Abstract: Methods of treating radioactive materials are disclosed. In one aspect, a method may include mixing a radioactive isotope diluted in a filler material with a radioactive material treatment composition to form a resulting material. The radioactive material treatment composition may include mostly salt, and from 0.5 to 15 wt % sorbent. The method may further include mixing the resulting material with one or more inorganic binding agents. Other methods of treating radioactive materials are also disclosed, as well as compositions for treating radioactive materials.

Abstract: A method for reducing the emissions from combustion gases produced during a combustion process includes injecting a hydrocarbon-based reducing agent into the combustion gases to form a combustion gas mixture. The combustion gas mixture including oxides of nitrogen, NOx, is directed through a selective catalyst reduction (SCR) system including a catalyst bed to remove NOx from the combustion gas mixture and to produce an exhaust gas. In one embodiment, the exhaust gases are released from the SCR to the atmosphere.

Abstract: A pair of reactant cover plates, e.g., fluid manifolds or protective covers (11, 12), on opposite sides of a fuel cell stack (7) are drawn to the fuel cells (14) and pressure plates (8) by tensioning lines, e.g., cables (23) or straps (23a), which may extend around structures, e.g., pins or extensions (11a, 12a; 11e, 12e) extending outwardly from the ends of the cover plates or guides (22a) on the stack, e.g., on the pressure plates in a closed loop, and are tensioned by a tensioning device, such as a turnbuckle (24).

Abstract: The invention relates to synthetic hybrid rock compositions, articles of manufacture and related processes employing mineral waste starting materials such as mine tailings, mine development rock, ash, slag, quarry fines, and slimes, to produce valuable articles of manufacture and products, which are characterized by superior physical and structural characteristics, including low porosity, low absorption, increased strength and durability, and retained plasticity. The resulting materials are compositionally and chemically distinct from conventional synthetic rock materials as demonstrated by scanning electron microprobe analysis, and are useful in a wide variety of applications, particularly with respect to commercial and residential construction.

Abstract: The present invention relates to a process and a plant for producing sulfuric acid, in which a starting gas containing sulfur dioxide at least partly reacts with molecular oxygen in at least one contact with at least one contact stage to form sulfur trioxide, and in which the sulfur-trioxide-containing gas produced is introduced into an absorber and converted there to sulfuric acid. To achieve that only small gas volumes must be supplied to the first contact stage, based on the amount of sulfur dioxide used, with at least the same capacity of the plant and by using conventional catalysts, it is proposed in accordance with the invention to supply to the first contact stage a contact gas with a sulfur dioxide content of more than 16 vol-% and with a volumetric ratio of sulfur dioxide to oxygen of more than 2.67:1.

Abstract: One exemplary embodiment can be a process for lowering an amount of carbon monoxide in a stream rich in hydrogen. The process can include passing the stream rich in hydrogen through a carbon monoxide removal zone to produce a product stream having no more than about 10 vppm carbon monoxide and communicating the product stream to a reduction zone receiving a catalyst comprising unreduced metal species.

Abstract: Alunite type compound particles represented by the following general formula (I) and having a specific value of D75/D25 when D25 is the particle diameter of particles which account for 25% of the total and D75 is the particle diameter of particles which account for 75% of the total in the cumulative particle size distribution curve measured by a laser diffraction method: Ma[Al1-xM?x]3(SO42?)y(OH)z.mH2O??(I) wherein M is at least one cation selected from the group consisting of Na+, K+, NH4+ and H3O+, M? is at least one cation selected from the group consisting of Cu2+, Zn2+, Ni2+, Sn4+, Zr4+ and Ti4+, and a, m, x, y and z satisfy 0.8?a?1.35, 0?m?5, 0?x?0.4, 1.7?y?2.5, and 4?z?7, respectively. The above particles of the present invention have a small average particle diameter, are spherical, disk-like or hexagonal and have an extremely narrow particle size distribution.

Abstract: Provided are a mesoporous carbon and a method of preparing the same, where the mesoporous carbon is prepared using phenanthrene as a carbon source and a mesoporous silica as a template. The mesoporous carbon has a significantly low plane resistance, which can be obtained without sacrificing other physical properties, and thus obtains a high conductivity and effectively transfers electrical energy. Accordingly, a fuel cell electrode or a fuel cell which is produced using the mesoporous carbon as a conductive material has high efficiency. Furthermore, the mesoporous carbon may be used in various electrochemical devices as a conductive material.

Abstract: The invention reveals a process and an apparatus for treating flue gas from sintering plants, in which dry additive consisting at least of adsorbent and recirculated material is added by the entrained-flow process to the flue gas from a sintering plant in a flue gas duct, and the additive is then separated out of the flue gas by fabric filters and at least partially recirculated. In this context, it is provided that additive is introduced at least one location in the opposite direction to the direction of flow of the flue gas.

Abstract: Process for the production of ammonium thiosulfate from gas streams comprising ammonia and hydrogen sulfide. One embodiment of the invention provides absorbing SO2 into a solution of ammonium sulfite and then contacting gaseous feed streams with portions of the resulting solution in a plurality of contact zones where portions of ammonium sulfite in the liquid streams are converted to ammonium thiosulfate upon contact with the gaseous feed streams.

Abstract: When titanium oxide is doped with nitrogen, the resulting titanium oxide photocatalyst can be driven with visible light, which is a main component of sunlight. However, in a known process, since a high-temperature heat treatment process necessary for nitrogen doping degrades the photocatalytic activity inherent in titanium oxide, it is difficult to produce a titanium oxide photocatalyst that can be driven with a high efficiency under sunlight. A titania/organic substance composite, which includes an organic ligand coordinated to flaky titania and forms a layered structure, is immersed in aqueous ammonia to substitute the organic ligand between layers with a hydroxyl group by a ligand exchange reaction, and at the same time, to introduce ammonium into between layers of the titania having the layered structure. The resulting composite of titania and ammonium is heated at a temperature of 400° C.

Abstract: The present invention is directed to a precious metal recovery process in which basic ferric sulphates and/or jarosites are controlled by a number of mechanisms, including control of the oxidation reaction conditions in the first autoclave compartment, hot curing of the autoclave discharge slurry, and/or contacting of the autoclave feed slurry with the hot cured discharge liquid.

Abstract: A device is disclosed for the generation of hydrogen peroxide. The device produces hydrogen peroxide on an as-needed basis through the use of electrolysis of water, wherein the hydrogen and oxygen are mixed in the electrolyzer, and the hydrogen and oxygen mixture in water are reacted in a reactor to produce hydrogen peroxide.

Abstract: A novel singlet oxygen quencher is disclosed. The quencher consists of a colloidal liquid of a platinum metal group. A composition comprising, as an active ingredient, the singlet oxygen quencher is also disclosed.

Abstract: A process for the complete destruction of gelled sulphur mustard (SM), comprising the steps of: (a) dissolving gelled sulphur mustard (SM) in organic solvent such as 2-chloroethanol, methanol, methyl cellosolve or mixtures of these to obtain a clear mixture, (b) incinerating the clear gelled sulphur mustard solvent mixture obtained from step (a); (c) dissolving residual gelled SM obtained from step (c) into non-toxic products; (d) chemically converting dissolved SM obtained from step (c) into non-toxic products.

Abstract: Feeding device for feeding burned lime to a reaction vessel for causticizing soda liquor to caustic soda. The feeding device, in its upper part, has an inlet for receiving slurry of the burned lime and the soda liquor for formation of said slurry inside said feeding device. The system further comprises a tall and slender feed vessel having a lower part having an outlet defined therein for the slurry. The outlet, via a pump, is operatively connected to the reaction vessel. The process and the feeding system utilize the feeding device, in which process the slurry is created of the burned lime and a first part of the soda liquor, a second part being preheated before addition to the slurry, whereafter slaking and causticizing reactions are completed under elevated temperature and pressure.