Abstract: An improvement in the operation of a thermal oxidizer during regeneration of an adsorber, wherein adsorbates collected in the adsorber are removed from the adsorber and introduced into the thermal oxidizer, by regenerative steam passed through the adsorber, to be oxidized in the thermal oxidizer during a regenerative cycle of prescribed duration, regulates the concentration of adsorbates in the regenerative steam passed to the thermal oxidizer such that the concentration of adsorbates introduced into the thermal oxidizer throughout the duration of the regenerative cycle is regulated to avoid excessive deviations from a selected average concentration of adsorbates, the regulated concentration of adsorbates enabling more efficient operation of the thermal oxidizer throughout the full duration of the regenerative cycle.

Abstract: A particulate trap for use in a diesel engine can efficiently trap particulates contained in exhaust gas with low pressure drop and can burn collected particulates for regeneration with less power consumption. A filter element having a built-in electric heater is mounted in a case provided in the exhaust line of a diesel engine. The filter has two mutually opposed surfaces between which is mounted the electric heater. With this arrangement, it is possible to increase the filtration area and also the heating efficiency.

Abstract: A continuous system and method for purging waste gases from dual heat exchange beds associated with a regenerative thermal oxidizer are disclosed. The system includes a purge recovery tank, a stack open to the atmosphere, a stack bypass, a stack valve in the stack, and a stack bypass valve in the stack bypass. The purge recovery tank is in fluid communication with two heat exchange beds, the stack, and the stack bypass. The stack is in fluid communication with the stack bypass and the heat exchange beds. A purge recycle control valve is used to recycle untreated waste gases from the purge recovery tank to the heat exchange beds and into the regenerative thermal oxidizer. A second embodiment wherein the purge recovery tank is positioned between the two heat exchange beds is also disclosed.

Abstract: An exhaust management control method comprising the steps of: immediately following a cold start of an engine, adsorbing hydrocarbons from engine exhaust into a hydrocarbon adsorber; determining when a catalytic converter catalyst light-off is obtained and thereafter purging the adsorber, wherein a first regeneration of the adsorber is obtained; detecting an engine off condition of the vehicle; and injecting air through the adsorber following the detected engine off condition while the adsorber is hot enough that coke deposits thereon are oxidized and thereby removed from the adsorber, wherein a second regeneration of the adsorber is achieved.

Abstract: A method of removing harmful gas is performed by a manner that a mixture of photocatalyzer and active carbon with air containing harmful gas and the mixture of photocatalyzer and active carbon are mixed in a chamber so as to drift the mixture in the air, the drifting mixture reacting with the harmful gas in illumination by lighting means, and the mixture catching said harmful gas so as to remove said harmful gas.

Abstract: The described exhaust gas purifier arrangement for an internal combustion engine provides gas purification efficiency while maintaining high output levels by providing an annular thin-walled catalyst element surrounding gas discharge openings in an expansion pipe having a closed downstream end whereby gas flowing in the expansion pipe is caused to flow radially through the thin-walled catalyst element into a chamber from whence it is conducted to a silencer element for further processing prior to discharge from a tail pipe.

Abstract: Disclosed is an ammonia adsorption apparatus for removing ammonia contained in a treated gas discharged from a denitrator for decomposing nitrogen oxides present in exhaust gas using ammonia as a reducing agent, comprising at least two adsorption towers into which ammonia-containing exhaust gas is introduced in a vertical direction for removing the ammonia by adsorption, wherein, during regeneration of each adsorption tower, hot gas used for desorption purposes flows from a top toward a bottom of the adsorption tower and cooling gas flows from the bottom toward the top of the adsorption tower.

Abstract: A method of quick purging beds of a regenerative fume incinerator which is practically applicable for use in 2, 3 and 4 bed incinerators. For a very short purge period near the end of an operating time cycle, the bed being switched from receiving impure gases to discharge of clean gas is purged of impure gases by being supplied with clean gas discharged by the incinerator. The quick purging takes less than 4% of the cycle time and thus inflow of impure gases is stopped for a very brief period when this quick purge method is used in a 2 bed incinerator. When using this quick purge method in a three or four bed regenerative fume incinerator there is always at least one bed receiving impure gases. This quick purge method improves the quality of the discharged clean gas without significant loss of thermal efficiency and without significant reduction in operating capacity.

Abstract: The invention provides a regenerable supported amine sorbent having an amine concentration of from about 35 wt. % to about 75 wt. %. The balance of the sorbent is a porous support which provides the sorbent with structural rigidity and a surface for gas/solid contact. The invention further provides a process for making the sorbent and system for cyclically absorbing and desorbing carbon dioxide using a plurality of sorbent beds.

Abstract: A process and device for removing and oxidizing organic substances from an extracted air stream. The air stream is flowed through a filter which adsorbs the organic material, where the airstream is bypassed around a catalyst until the filter is saturated. At saturation a heater supplies heat to the filter to desorb the organic material. The catalyst is heated by another heater at the desorption period and receives the organic material and extracted air stream to oxidize the organic substances.

Abstract: The present invention provides an exhaust gas purifier for collecting particulates with fiber filters while reducing NO.sub.x by the action of granulated materials disposed on the outer sides of the fiber filters and having an NO.sub.x -reducing action. In this exhaust gas purifier, the fiber filters for collecting particulates contained in exhaust gas are constituted of a randomly laminated nonwoven fabric, and electric wire nets are disposed on the inner sides of the fiber filters. The granulated materials made of Ba.sub.3 Y.sub.4 O.sub.9, BaLa.sub.2 O.sub.4 or Ba.sub.2 In.sub.2 O.sub.5 having an NO.sub.x -reducing action are filled in a large numbers of cells of porous members disposed on the downstream sides of the fiber filters.

Abstract: The present invention relates to an exhaust gas treatment unit which possesses a stable treating capacity, with a reduced running cost. The exhaust gas treatment unit removes noxious gases such as monosilane contained in an exhaust gas by thermal decomposition. The exhaust gas treatment unit includes a heating drum (5) into which the exhaust gas and oxygen or air are introduced and a heating source (6) disposed on the outer periphery of the heating drum (5) so as to heat the inside of said heating drum (5). A temperature sensor (14) detects the temperature of the inside of said heating drum (5) in the vicinity of its outlet and a controller (16) controls the heating source (6) in accordance with a detected temperature value from the temperature sensor (14) so that the temperature of the inside of said heating drum (5) in the vicinity of the outlet is maintained within a predetermined temperature range.

Abstract: A filter is provided for treating carbon-based particles in exhaust gas discharged from a diesel internal combustion engine, etc., said filter providing in addition to a high throughput capacity, excellent durability, and good economic and maintenance properties, and a device for treating carbon-based particles in exhaust gas having a high throughput capacity, the regeneration of which is easy. This filter is obtained by cutting an end face of a coiled material that is obtained by winding a sheet of a high-temperature resistant stainless steel having resistance heat-generating properties to produce fibers, gathering the thus-produced fibers to form a web, sintering the web, heat-treating the sintered web to form an alumina film on the surface of the sintered fibers, and optionally supporting a catalyst on the alumina film.

Abstract: Substantial improvements in the control of pollutants from internal combustion engines may be obtained by pre-drying a catalyst/hydrocarbon trap system and preferably incorporating a water trap in a catalyst/hydrocarbon trap system. A pre-drying system dries the water trap, HC trap and catalyst, eg upon engine switch-off.

Abstract: For a system having a source of nitrogen oxide-containing gas, an ammonia reduction denitrator, and a leak ammonia recovery unit which adsorbs and removes ammonia escaping from said ammonia reduction denitrator, a method of removing adsorbed ammonia from said leak ammonia recovery unit and reusing the removed ammonia is provided which includes the steps of: introducing hot exhaust gas discharged from said nitrogen oxide-containing gas source into said leak ammonia recovery unit to desorb ammonia therefrom; after desorption of ammonia, cooling said heated leak ammonia recovery unit with cool air; and feeding ammonia carried away by said hot exhaust gas and said cool air to an upstream side of said ammonia reduction denitrator or to the source of nitrogen oxide-containing gas.

Abstract: An apparatus for regenerating a catalyst absorber after contact with a combustion exhaust which consist of a pair of cooperating louvered doors one on each side of a bed of catalyst absorber, there being at least two beds such that closing a cooperating pair of louvers, isolates the bed contained between the louvers from the exhaust gases while the other bed is left with the louvers open to continue treating the exhaust gas. Between each pair of louvers and associated with the catalyst absorber bed between the respective pair of louvers, there are positioned a regeneration inlet nozzle and a used regeneration gas outlet. By selectively closing various pairs of the louvers, a portion of the bed can be regenerated while the remainder of the bed continues to treat the exhaust gases. In this way an equivalent amount of active or regenerated catalyst absorber is in contact with the combustion exhaust gases to maintain a specified outlet pollution concentration limit.

Abstract: This invention relates to a flue gas treating system including a desulfurization apparatus for bringing flue gas into contact with a calcium compound-containing slurry so as to cause sulfur dioxide present in the flue gas to be absorbed into the slurry, oxidizing the slurry having undergone contact with flue gas, and subjecting the oxidized slurry to solid-liquid separation so as to obtain gypsum as a by-product; a waste water treating apparatus for treating part of a first filtrate produced during solid-liquid separation of the slurry having undergone contact with flue gas in the desulfurization apparatus; and solid-liquid separation device for subjecting sludge produced in the waste water treating apparatus to solid-liquid separation independently of the slurry having undergone contact with flue gas, wherein a solid material separated from the sludge by the solid-liquid separation device is incorporated into the gypsum and all of a second filtrate produced during solid-liquid separation of the sludge by the

Abstract: Improved gas exhaust apparatus of a semiconductor plant for substantially reducing the accumulation of solid substance on the surface of a gas exhaust system is disclosed. The apparatus includes a heating section for providing a thermal chamber, thereby transforming incoming gas and oxygen into solid substance. A barrier section is secured to an inner surface of the heating section for preventing the solid substance from accumulating on the inner surface of the heating section. A scrubbing section attached to the heating section is used to expel the solid substance out of the gas exhaust apparatus.

Abstract: A reforming reactor is provided with a catalyst and a heating resistor. The heating resistor is embedded in a catalyst. A reforming reactor can start rapidly with high thermal efficiency and which is excellent in recovery of hydrogen.

Abstract: In a hydrogen treating plant which includes a recycle gas line having a reactor for regenerating a hydrogen sulfide by hydrogenating sulfur and an H2S absorber for absorbing the hydrogen sulfide generated in the reactor, and includes the liquid cyclic line circulating liquid for absorbing the hydrogen sulfide in the H2S absorber therein, a refrigerant unit provided in the liquid cyclic line which is lower temperature and lower pressure relative to the recycle gas line.

Abstract: A purge retention chamber is incorporated into an inlet manifold for a two heat exchanger RTO system. A bypass valve is mounted into the purge retention chamber adjacent a downstream end, and a purge face valve is mounted in the inlet manifold between upstream and downstream connection ends of the purge retention chamber. During normal operation, the bypass valve is closed and clean air fills the purge retention chamber. Dirty air to be cleaned passes through the purge face valve and moves to a heat exchanger in an inlet mode. When a purge mode begins, the purge face valve is closed and the purge bypass valve is opened. Now, clean purge gas moves into the inlet manifold and is delivered to a heat exchanger which is beginning to switch from an inlet mode to an outlet mode. The clean purge gas purges the heat exchanger. Once the purging is complete, the heat exchangers are switched between inlet and outlet modes.

Abstract: The present invention relates to a method and to a device for separating plasma from whole blood. The method and device utilize a permeable non-glass fiber matrix containing a polyol which is capable of clumping red blood cells. The matrix, in the absence of such a polyol, would otherwise be porous to red blood cells. The polyol-containing matrix has a first surface and a second surface such that a whole blood sample which is applied to the first surface flows directionally toward the second surface. Plasma separated from whole blood becomes available at the second surface of the matrix and can be tested for the presence of a particular analyte, such as glucose or fructosamine, as provided by multi-layer test devices of the present invention.

Abstract: An apparatus for controlling the hydrogen sulfide concentration in an acid gas stream and the hydraulic loading of a sulfur recovery unit of the type having an absorber for contacting a sour gas stream with an absorbent, a regenerator for regenerating the absorbent to form an acid gas stream and a recycle system. Embodiments using multiple absorbers and/or multiple regenerators are disclosed.

Abstract: An apparatus is disclosed for removal of contaminate(s) from a gas stream in an oil or gas refinery using an absorber-regenerator process wherein a portion of the contaminate rich overhead gas from the regenerator is utilized to increase the partial pressure of the contaminate at the absorber so as to enhance selective absorption of the contaminate(s).

Abstract: An exhaust gas purification system includes an adsorbent containing an adsorbent element for adsorbing harmful compounds such as hydrocarbon in an exhaust gas and a catalyst containing a catalyst element for lowering the harmful compounds in the exhaust gas, each disposed in the exhaust gas pipe of an internal combustion engine. When an oxidizing gas is added to the exhaust gas or amounts of combustion gas and fuel are regulated, for a given period, in the process in which the hydrocarbon in the exhaust gas produced at the cold start-up of the internal combustion engine are adsorbed by the adsorbent and desorbed from the adsorbent as a temperature of the adsorbent is increased by the exhaust gas, an exhaust gas composition containing excessive oxygen is provided and the desorbed hydrocarbon are oxidized on the catalyst. With this arrangement, the harmful compounds in the exhaust gas, in particular, the hydrocarbon produced in a large amount at the cold start-up of the engine can be effectively purified.

Abstract: A process and system for reducing cold start NO.sub.x, carbon monoxide, and hydrocarbon emissions from mobile source engine exhaust utilizes adsorption and desorption of NO.sub.x compounds on a regenerable sorbent material. Molecules of NO.sub.x are adsorbed onto the sorbent material during the ineffective warm up period of a three-way catalytic converter. When the catalytic converter reaches operating temperatures, the NO.sub.x molecules are thermally desorbed from the sorbent material and delivered to the catalytic converter for effective reduction to molecular nitrogen.

Abstract: A filter utilizes a filter bed having a ceramic media to remove particulates from process emissions upstream of a regenerative incinerator to prevent fouling of the incinerator. To prevent the filter from fouling, the filter is adapted to "bake-off" contaminants from the filter bed by providing a flow of hot innocuous air through the filter. In addition, fluid can be flushed through the filter.

Abstract: This invention relates to a gas-liquid contacting device for efficiently bringing a gas into contact with a slurry solution, and a wet flue-gas desulfurization system using the contacting device. The contacting device incorporated in the system comprises a tank to be supplied with a slurry solution, a set of agitator bars held above the bottom of the tank to be horizontally rotatable, a plurality of gas supply pipes for supplying a gas to the vicinity of the agitator bars, nozzles directed to the region through which the agitator bars rotate or to its vicinity, and a plurality of liquid supply pipes for supplying a liquid to the nozzles.

Abstract: The invention discloses a NOx adsorption and removal apparatus employed in the method of passing NOx containing gas into the adsorber 1 filled with NOx adsorbent to adsorb a specific volume of NOx on the adsorbent, passing hot air into the adsorber to desorb NOx, and regenerating the adsorbent, wherein the adsorber is divided in plural zones arranged parallel in the gas flow direction. In this invention, by regenerating after adsorbing NOx in each zone, the regenerating apparatus can be reduced in size, and the energy may be saved by effective utilization of preheat.

Abstract: A two chamber regenerative thermal oxidizer comprises an oxidizing chamber and a pair of regenerator chambers. Inlet and outlet valves control fluid flow to and from said regenerator chambers. A transition duct communicates with a contaminated fluid feed duct upstream of the regenerator inlet valves and with the oxidizing chamber of said oxidizer. Electronic control means opens and closes valves, selectively, in a prearranged sequence whereby the inlet and outlet valves in an individual regenerator are never open at the same time, thereby precluding short circuiting of the regenerative chamber, yet all of the inlet and outlet valves to the regenerative chambers are never simultaneously closed thereby to maintain the pressure of fluid flow through said regenerator chambers relatively constant.

Abstract: In order to economically remove harmful components in exhaust gases by using a simple and extremely durable system, an exhaust gas to be treated is introduced into a neutralizing tower provided with a first duct and a second duct. Harmful components in the exhaust gas chemically react with a neutralizing agent randomly stacked within the neutralizing tower, and such components become deposited on the surface of the neutralizing agent. Water is supplied from a water supply pipe to the surface of the neutralizing agent by driving a pump after passage of a predetermined period of time, and the surface of the neutralizing agent is washed thereby. Additional exhaust gases are further fed and reacted with the neutralizing agent, which has a renewed surface exposed again. The neutralizing agent can thus be repeatedly used for removal of harmful components in the exhaust gases.

Abstract: A method of decreasing the level of NOx, CO and SO.sub.2 emissions in a gas turbine is disclosed. A catalyst absorber, preferably made of alumina/platinum/carbonate salt, is used to oxidize the pollutant oxides and absorb them. The catalyst absorber can then be regenerated and reused. An apparatus for treating the stack gases and a method of making the catalyst absorber are also described.

Abstract: A system for the abatement of industrial process emissions comprises a catalytic oxidizer and a selective catalytic reduction bank integrated into a single housing. The system utilizes at least two regenerative chambers in a controlled abatement process. The integrated system removes volatile organic compounds (VOCs), carbon monoxide (CO), and toxic oxides of nitrogen (NO.sub.x) from the process emissions. The singular housing of the present invention is efficient and eliminates the need for more than one supplementary heat source, while eliminating major pollutants from the emissions.

Abstract: A hot gas cleanup system for removing particulates, alkali and sulfur from fuel gas produced by the gasification of coal in a gasifier, especially in an integrated gas turbine gasification power plant. A calcium based sulfur sorbent and an alkali sorbent are injected directly into the fuel gas and then recovered, along with the used sorbent, in a high efficiency, high temperature ceramic barrier filter. The fuel gas is then subjected to further de-sulfurization in a polishing de-sulfurizer supplied with a copper based sulfur sorbent. The used copper based sorbent is regenerated in fluidized bed regenerator. The regenerated sorbent is returned to the polishing de-sulfurizer and sulfur dioxide produced by the regeneration is directed to an oxidizer to which the used and unused sulfur sorbent from the filter is supplied so that the sulfur dioxide can be captured and so that the used sulfur sorbent can be converted to a more stable form for disposal.

Abstract: An apparatus for purifying a pollutant-containing outgoing air from the industrial installations has a heat exchanging bed, which has a predetermined thickness, consist of a suitable, preferably mineral, material, and is located in the interior of a shaft-like reactor housing. During the purifying operation, the pollutant-containing air flows through the heat exchanging bed into a combustion chamber, and heated purified air flows from the combustion chamber through the heat exchanging bed in opposite direction, giving up its heat to the heat exchanging bed and thereby being cooled down. The pollutants contained in the pollutant-containing air are burned in the heat exchanging bed and, if needed, in the combustion chamber.

Abstract: A method is provided for selectively removing nitrogen oxides from gaseous mixtures using alkali and/or alkaline earth oxides as sorbents, followed by conversion of the adsorbed NO.sub.x into N.sub.2 and O.sub.2 using a solid-oxide electrochemical cell. The method is useful for treating many sources of nitrogen oxide pollutants, e.g., vehicle exhaust, industrial manufacturing, coal burning, and the like.

Abstract: An acid gas removal process employing a regenerator with an internal flash section is described. The regenerator uses gravitational flow to feed the flash section, eliminating the need for an external flash tank, and charge pump even without vacuum. The internal flash section has a first pressure side, a second pressure side having a lower pressure than the first pressure side during gas flow and a pressure reduction zone disposed therebetween. The pressure drop in the pressure reduction zone is due to liquid flow pressure losses occurring as liquid flows from said first pressure side to said second pressure side. A liquid seal between the first pressure and second pressure sides eliminates the need for a pressure let down valve. Vacuum control is provided by the first pressure side liquid level.

Abstract: A regenerative bed incinerator 10 is provided with a gas recirculation duct 80 through which a controlled amount of gaseous fuel is injected in the contaminated process exhaust gases 3 prior to admission to the regenerative bed incinerator 10 to increase the heating value of the process exhaust gases 3 so as to improve overall contaminated destruction efficiency for process exhaust gases which have a low level of combustible contaminants therein.

Abstract: A multiple bed regenerative incinerator is cycled at regular intervals by an automatic control which causes fuel gas to be added to the impure inlet air for a first part of each cycle interval and interrupts the flow of fuel gas to the impure air inlet during a last part of each cycle interval thereby improving the purging of fuel gas from the regenerator being fed the impure air. Fuel gas flow may be adjusted by the control in response to signals from a monitor sensing the lower explosive limit of the impure air/fuel gas mixture. The control may cause the fuel gas to be delivered to a burner in a combustion chamber interconnecting the hot ends of the regenerators during the last part of each cycle interval. High dilution of fuel limits fume temperature and NOx production.

Abstract: A process and apparatus for generating elemental sulfur and re-usable metal oxide from spent metal-sulfur compound. Spent metal-sulfur compound is regenerated to re-usable metal oxide by moving a bed of spent metal-sulfur compound progressively through a single regeneration vessel having a first and second regeneration stage and a third cooling and purging stage. The regeneration is carried out and elemental sulfur is generated in the first stage by introducing a first gas of sulfur dioxide which contains oxygen at a concentration less than the stoichiometric amount required for complete oxidation of the spent metal-sulfur compound. A second gas containing sulfur dioxide and excess oxygen at a concentration sufficient for complete oxidation of the partially spent metal-sulfur compound, is introduced into the second regeneration stage. Gaseous sulfur formed in the first regeneration stage is removed prior to introducing the second gas into the second regeneration stage.

Abstract: A ceramic exhaust trap regenerator provides a push-pull heat channeling method of transferring heat to and through the ceramic monolith with a flow of super-heated air. The application of heat is controlled by pulling the hot air through the monolith and away from the downstream side of the monolith through a vacuum hose. The regeneration process is started and completely controlled by an off-board mobile regeneration console with the engine off. The console is a wheeled cart with attachments that include an air heater, vacuum and positive pressure air pumps with attaching hoses, a temperature-actuated relay, a particulate filter, process timers, a heat exchanger, a cooling fan, and an electrical controller.

Abstract: A catalyst system comprising a metal catalyst in a liquid catalyst solution, means for adding metal catalyst from the solution to a combustion system, and a catalyst collector for collecting the metal catalyst which serves as a reaction vessel. A method for converting emissions from a combustion chamber comprising providing a source of metal catalyst in a liquid solution; adding the metal catalyst to a combustion system; carrying the metal catalyst to a catalyst collector: depositing the metal catalyst on a solid surface in the catalyst collector; and converting the emissions for the combustion chamber by contacting the emissions and the metal catalyst. Preferably, the metal catalyst solution contains a plurality of metals.

Abstract: A regenerative thermal oxidizer for oxidizing a contaminant in an air or other gas stream includes a heat transfer material which heats the incoming air and collects heat from the exiting air. The direction of flow of the air through the oxidizer is periodically reverse for the regenerative heat exchange. When flow is reversed, a quantity of untreated air in the oxidizer which would otherwise be discharged to the atmosphere is collected in a purge chamber which surrounds the lower portion of the discharge stack. The untreated air enters the bottom of the chamber and the air already in the chamber is forced out from vent holes in the top of the chamber into the stack. The untreated air in the chamber is fed back to the oxidizer through the inlet of the blower feeding the oxidizer while clean air is drawn into the chamber from the stack through the vent holes.

Abstract: An improved process and apparatus for the gas phase reaction of a feed gas mixture in a regenerative incinerator comprising a combustion zone in fluid communication with at least three separately-housed chambers. Each chamber contains a layer of solid heat exchange material, and is in selective fluid communication with an inlet manifold and an exhaust manifold such that each chamber is selectively operable in an intake mode and an exhaust mode. A layer of catalyst is disposed in each chamber such that catalytic reaction of the feed gas mixture occurs and the operating temperature of the combustion zone may be reduced.

Abstract: The present invention provides a flue gas conditioning system and method for generating conditioning agent used in the removal of entrained particles in a flue gas flow with an electrostatic precipitator. The invention involves the use of a catalytic converter movable between an operative position where the flue gas flows through the catalyst and converts SO.sub.2 contained in the flue gas to SO.sub.3 when conditioning agent is needed and an inoperative position where the flue gas does not flow through the catalyst when conditioning agent is no longer needed. The movable catalytic converter and related assembly may take variable configurations to accommodate various flue gas ductworks and space limitations and may carry one or more SO.sub.2 /SO.sub.3 converters providing a plurality of open and generally parallel flow paths of the flue gas that are formed by a catalyst effective over a wide range of temperatures for the controlled conversion of preferably a low percentage of SO.sub.2 in the flue gas to SO.

Abstract: The invention includes a method of reducing hydrocarbon emissions from electronic port fuel injected engines by feeding to the catalytic converter an amount effective to reduce hydrocarbon emissions from the engines of chlorine or a chlorine compound.

Abstract: A process and system for simultaneously removing from a gaseous mixture, sulfur oxides by a solid sulfur oxide acceptor sorbent on a porous carrier, nitrogen oxides by ammonia gas and particulate matter by filtration and for the regeneration of loaded solid sulfur oxide acceptor sorbent. Finely-divided solid sulfur oxide acceptor sorbent is entrained in a gaseous mixture to deplete sulfur oxides from the gaseous mixture, the finely-divided solid sulfur oxide acceptor sorbent being dispersed on a porous carrier material having a particle size up to about 200 microns. In the process, the gaseous mixture is optionally prefiltered to remove particulate matter and thereafter finely-divided solid sulfur oxide acceptor sorbent is injected into the gaseous mixture to form an entrained bed. Ammonia gas is also injected into the exhaust gas stream. A filter separates spent solid sorbent and particulate matter from clean gas. A classifier is used to separate mixtures of spent sorbent from particulate matter.

Abstract: An apparatus for regenerating depleted deNO.sup.d catalysts includes a combustion chamber having a combustion zone, a flue gas conduit communicating with the combustion zone and a deNO.sub.x catalyst having surfaces in the flue gas conduit. An injection device may be disposed between the combustion zone and the surfaces for injecting molybdenum-oxide-containing dust when the deNO.sub.x catalyst is depleted, or a molybdenum-oxide-containing surface may be disposed in the flue gas conduit between the combustion zone and the surfaces for regeneration when the deNO.sub.x catalyst is depleted.

Abstract: A system for high temperature desulfurization of coal-derived gases using regenerable sorbents. One sorbent is stannic oxide (tin oxide, SnO.sub.2), the other sorbent is a metal oxide or mixed metal oxide such as zinc ferrite (ZnFe.sub.2 O.sub.4). Certain otherwise undesirable by-products, including hydrogen sulfide (H.sub.2 S) and sulfur dioxide (SO.sub.2) are reused by the system, and elemental sulfur is produced in the regeneration reaction. A system for refabricating the sorbent pellets is also described.

Abstract: A method for continuously treating a gas using an apparatus with a catalyst bed housed therein comprises the steps of passing a subject gas through the catalyst bed to adsorb the adsorbable substances in the subject gas thereto; and passing a regenerating gas through the catalyst bed adsorbed by the adsorbable substances in the subject gas to react and decompose them and simultaneously regenerate the catalyst bed. A particular apparatus is used with this method.By carrying out this method of the present invention using the gas treating apparatus, it is possible to continuously, efficiently and economically advantageously treat a gas containing a malodorous component, harmful component, organic solvent, hydrocarbon vapor or the like.