Abstract: Zeolite/alumina composite, and a method for making, the composite for use as a catalyst substrate or catalyst carrier and comprising zeolite having a silica/alumina ratio of greater than 300 and gamma alumina having a specific surface area of greater than 100 m2/g. The zeolite/alumina composite exhibits a modulus of rupture of at least 750 psi. Additionally, the invention is also directed at a three catalyst (TWC) system for use in the removal of hydrocarbons, carbon monoxide and oxides of nitrogen from waste gas, the TWC system comprising the following components: (1) a zeolite/alumina composite catalyst support exhibiting a modulus of rupture of at least 750 psi and having a zeolite with a silica/zeolite ratio of at least 300 and the alumina comprising a gamma alumina having a specific surface area of greater than 100 m2/g; and, (2) a noble metal catalyst impregnated on the catalyst support, the noble metal selected from the group consisting of platinum, rhodium, iridium and palladium.

Abstract: A catalyst for purifying an exhaust gas to remove nitrogen oxides, carbon monoxide and hydrocarbons from exhaust gas comprising a zeolite having a silica/alumina molar ratio of greater than 55, and at least 1.5%, by weight, each of nickel and cobalt incorporated therein. A second embodiment of the is an adsorber catalyst system for use in the removal of the oxides of nitrogen from waste gas, the adsorber/catalyst system comprising the following components: (1) a zeolite having a silica/alumina ratio of greater than 55; (2) at least 1.5%, by weight, each of nickel and cobalt incorporated therein; and, (3) an adsorber component comprising a mixture of gamma alumina support and a adsorber material selected from the group consisting of metal oxides, metal hydroxides, metal carbonates and mixed metal oxides.

Abstract: Zeolite/alumina composite, and a method for making, the composite for use as a catalyst substrate or catalyst carrier and comprising zeolite having a silica/alumina ratio of greater than 300 and gamma alumina having a specific surface area of greater than 100 m2/g. The zeolite/alumina composite exhibits a modulus of rupture of at least 750 psi. Additionally, the invention is also directed at a three catalyst (TWC) system for use in the removal of hydrocarbons, carbon monoxide and oxides of nitrogen from waste gas, the TWC system comprising the following components: (1) a zeolite/alumina composite catalyst support exhibiting a modulus of rupture of at least 750 psi and having a zeolite with a silica/zeolite ratio of at least 300 and the alumina comprising a gamma alumina having a specific surface area of greater than 100 m2/g; and, (2) a noble metal catalyst impregnated on the catalyst support, the noble metal selected from the group consisting of platinum, rhodium, iridium and palladium.

Abstract: A catalyst for purifying an exhaust gas to remove nitrogen oxides, carbon monoxide and hydrocarbons from exhaust gas comprising a zeolite having a silica/alumina molar ratio of greater than 55, and at least 1.5%, by weight, each of nickel and cobalt incorporated therein. A second embodiment of the is an adsorber catalyst system for use in the removal of the oxides of nitrogen from waste gas, the adsorber/catalyst system comprising the following components: (1) a zeolite having a silica/alumina ratio of greater than 55; (2) at least 1.5%, by weight, each of nickel and cobalt incorporated therein; and, (3) an adsorber component comprising a mixture of gamma alumina support and a adsorber material selected from the group consisting of metal oxides, metal hydroxides, metal carbonates and mixed metal oxides.

Abstract: Zeolite/alumina composite, and a method for making, the composite for use as a catalyst substrate or catalyst carrier and comprising zeolite having a silica/alumina ratio of greater than 300 and gamma alumina having a specific surface area of greater than 100 m2/g. The zeolite/alumina composite exhibits a modulus of rupture of at least 750 psi. Additionally, the invention is also directed at a three catalyst (TWC) system for use in the removal of hydrocarbons, carbon monoxide and oxides of nitrogen from waste gas, the TWC system comprising the following components: (1) a zeolite/alumina composite catalyst support exhibiting a modulus of rupture of at least 750 psi and having a zeolite with a silica/zeolite ratio of at least 300 and the alumina comprising a gamma alumina having a specific surface area of greater than 100 m2/g; and, (2) a noble metal catalyst impregnated on the catalyst support, the noble metal selected from the group consisting of platinum, rhodium, iridium and palladium.

Abstract: A sensor for measuring the non-methane HC concentration of gas sample, e.g., automotive exhaust gas, the sensor comprises a sensor base, capable of producing a output signal representative of the exothermic effect of the hydrocarbon species in the gas sample. The sensor base has disposed on, and integral with, its surface, a porous selective oxidation catalyst layer comprising capable of selectively oxidizing a combination of CO+H2+alkene species in the gas sample and leaving unoxidized the alkane and aromatic hydrocarbons. The sensor base further includes a first supported resistance temperature device which has disposed thereon a total oxidation catalyst layer capable of oxidizing the remaining alkane and aromatic hydrocarbon species in the gas sample, and a non-catalyzed second resistance temperature device.

Abstract: A system for measuring the non-methane HC concentration of gas sample, e.g., automotive exhaust gas, comprises a sensor catalyst capable of selectively oxidizing the combination of CO+H2+alkene hydrocarbons in a gas sample and a catalytic differential calorimetric sensor downstream of the sensor catalyst, capable of producing an output signal representative of the exothermic effect of oxidation of the remaining aromatic and alkane hydrocarbons in the gas sample. The system also includes a heater for maintaining both the sensor catalyst and the catalytic calorimetric sensor at a temperature sufficient to achieve substantially complete oxidation of the CO+H2+alkene hydrocarbon combination and the aromatic and alkane hydrocarbons, respectively. Lastly, the system includes a means for analyzing the output signal representative of the concentration of unburned aromatic and alkane hydrocarbons in the exhaust gas to determine concentration of the total non-methane hydrocarbon species.

Abstract: A system for measuring the non-methane HC concentration of gas sample, e.g. automotive exhaust gas, comprising first and second catalytic differential calorimetric sensors. The first catalytic differential calorimetric sensor is capable of producing a first output signal representative of the exothermic effect of the oxidation of the predominate oxidizable species (CO+H.sub.2 +non-methane HC combination) in the gas sample. The second catalytic differential calorimetric sensor is capable of producing a second output signal representative of the exothermic effect of the combined oxidation of the CO+H.sub.2 +alkene hydrocarbon species in the gas sample. Lastly, the system includes a means for comparing the first output signal with the second output signal, thereby indicating the total concentration of unburned aromatic and alkane hydrocarbon species in the gas sample which directly correlates to the total non-methane HC concentration.

Abstract: A getter for immobilizing water and organic molecules which may be present as impurities in an enclosure for a high power laser. The getter is formulated from selected zeolite compositions having a pore or channel size suitable for immobilizing water and a size range of organic molecules up to about 40 microns. A binder is used to provide a getter having sufficient strength to allow use of the getter in a laser enclosure in a telecommunications application. The binder also provides a substantially dust free getter body to maintain the cleanliness of the interior of the laser enclosure. Getters which immobilize only organics or only water are contemplated.

Abstract: This invention is directed at a cross-flow filtration device for receiving a feed stock and for separating the feed stock into filtrate and retentate, comprising a multicellular monolith structure having a central longitudinal axis and a peripheral surface. The monolith structure has both an inlet and outlet end face and a matrix of porous walls which define a plurality of cells; these mutually parallel cells extending longitudinally between the inlet and outlet end faces. The cells exhibit a uniform transverse cross section throughout each respective cell's length and each cell's cross-section and shape is variable when compared to at least one other cell such that all of the cells of the structure exhibit an equivalent hydraulic diameter. Lastly, the monolith structure's cells exhibit an increasing aggregate wall thickness in at least one direction as the cells approach the peripheral surface.

Abstract: A method of forming complex shapes from soft solvent-containing batches and maintaining the integrity of such formed bodies. The formed bodies are made self-supporting immediately after forming or soon thereafter by contacting the shaped body with a drying or hardening liquid in which the solvent is soluble. A method is also disclosed for simultaneously drying a formed body and creating or increasing the porosity of the body by adding solid particles which are soluble in the drying liquid.

Abstract: Thermal-shock-resistant fuel cell designs comprising flat and corrugated ceramic sheets combined to form channeled structures, the sheets being provided as thin, flexible ceramics and being particularly effective when used as components of compliant electrolyte substructures incorporating the flexible ceramics with fuel cell electrodes and/or current conductors bonded thereto, are described.

Abstract: The invention features porous substrates or supports fabricated from titania powder(s) having mean particle size of at least 7 .mu.m. The titania substrates are useful for supporting porous membranes for separation and filtration processes. The titania powders provide supports with mean pore sizes in the approximate range of 3 to 15 .mu.m, a sharp or narrow pore size distribution, total Hg porosities of at least about 30%, and MOR strengths of 50 up to 280 or more Kg/cm.sup.2. A combination of several different titania powders produced the best results. Titania membranes can be formed on the titania supports.