Abstract: A method for ammonia decomposition to produce hydrogen, the method comprising the steps of introducing an ammonia stream to a reactor, wherein the ammonia stream comprises ammonia, wherein the reactor comprises a cobalt-based catalyst, the cobalt-based catalyst comprising 15 wt % and 70 wt % of cobalt, 5 wt % and 45 wt % of cerium, and 0.4 wt % and 0.5 wt % barium, wherein a remainder of weight of the cobalt-based catalyst is oxygen; contacting the ammonia in the ammonia stream with the cobalt-based catalyst, wherein the cobalt-based catalyst is operable to catalyze an ammonia decomposition reaction; catalyzing the ammonia decomposition reaction to cause the ammonia decomposition in the presence of the cobalt-based catalyst to produce hydrogen; and withdrawing a product stream from the reactor, the product stream comprising hydrogen.

Abstract: A method for ammonia decomposition to produce hydrogen, the method comprising the steps of introducing an ammonia stream to a reactor, wherein the ammonia stream comprises ammonia, wherein the reactor comprises a cobalt-based catalyst, the cobalt-based catalyst comprising 15 wt % and 70 wt % of cobalt, 5 wt % and 45 wt % of cerium, and 0.4 wt % and 0.5 wt % barium, wherein a remainder of weight of the cobalt-based catalyst is oxygen; contacting the ammonia in the ammonia stream with the cobalt-based catalyst, wherein the cobalt-based catalyst is operable to catalyze an ammonia decomposition reaction; catalyzing the ammonia decomposition reaction to cause the ammonia decomposition in the presence of the cobalt-based catalyst to produce hydrogen; and withdrawing a product stream from the reactor, the product stream comprising hydrogen.

Abstract: A method for ammonia decomposition to produce hydrogen, the method comprising the steps of introducing an ammonia stream to a reactor, wherein the ammonia stream comprises ammonia, wherein the reactor comprises a cobalt-based catalyst, the cobalt-based catalyst comprising 15 wt % and 70 wt % of cobalt, 5 wt % and 45 wt % of cerium, and 0.4 wt % and 0.5 wt % barium, wherein a remainder of weight of the cobalt-based catalyst is oxygen; contacting the ammonia in the ammonia stream with the cobalt-based catalyst, wherein the cobalt-based catalyst is operable to catalyze an ammonia decomposition reaction; catalyzing the ammonia decomposition reaction to cause the ammonia decomposition in the presence of the cobalt-based catalyst to produce hydrogen; and withdrawing a product stream from the reactor, the product stream comprising hydrogen.

Abstract: A method for ammonia decomposition to produce hydrogen, the method comprising the steps of introducing an ammonia stream to a reactor, wherein the ammonia stream comprises ammonia, wherein the reactor comprises a cobalt-based catalyst, the cobalt-based catalyst comprising 15 wt % and 70 wt % of cobalt, 5 wt % and 45 wt % of cerium, and 0.4 wt % and 0.5 wt % barium, wherein a remainder of weight of the cobalt-based catalyst is oxygen; contacting the ammonia in the ammonia stream with the cobalt-based catalyst, wherein the cobalt-based catalyst is operable to catalyze an ammonia decomposition reaction; catalyzing the ammonia decomposition reaction to cause the ammonia decomposition in the presence of the cobalt-based catalyst to produce hydrogen; and withdrawing a product stream from the reactor, the product stream comprising hydrogen.

Abstract: An oxidizer catalyst assembly for use in a fuel cell system for oxidizing anode exhaust gas and in which a first catalyst member is situated along a gas flow path and a second catalyst member is situated along the gas flow path following the first catalyst member. Each of the catalyst members includes a plurality of channels for passing the gas therethrough and an oxidizing catalyst deposited in the channels. The channel density of the channels of the second catalyst member is greater than the channel density of the channels of the first catalyst member and the channel width of the channels of the second catalyst member is less than the channel width of the channels of the first catalyst member.

Abstract: A reforming catalyst member having an elongated body whose outer surface has a number of peak and valley regions so as to increase the area of the outer surface to enhance catalyst utilization.

Abstract: An oxidizer catalyst assembly for use in a fuel cell system for oxidizing anode exhaust gas and in which a first catalyst member is situated along a gas flow path and a second catalyst member is situated along the gas flow path following the first catalyst member. Each of the catalyst members includes a plurality of channels for passing the gas therethrough and an oxidizing catalyst deposited in the channels. The channel density of the channels of the second catalyst member is greater than the channel density of the channels of the first catalyst member and the channel width of the channels of the second catalyst member is less than the channel width of the channels of the first catalyst member.

Abstract: A method and apparatus for use with an oxidizer assembly of a fuel cell system in which the oxidizer assembly has an oxidizing unit for oxidizing anode exhaust gas containing electrolyte particulates and is adapted or conditioned so as to enable the electrolyte particulates to be removable from the assembly and to be removed from the assembly, and wherein the conditioning and removing occur with the oxidizing unit retained in the oxidizer assembly. The fuel cell system is also adapted so that such conditioning and removing occur with the oxidizing assembly retained in the fuel cell system.

Abstract: A pre-processing assembly and method for processing fuel feedstock containing oxygen and hydrocarbons having higher and lower hydrocarbon content for a fuel cell, wherein the pre-processing assembly has a deoxidizing bed for reducing oxygen in the fuel feedstock and a pre-reforming bed for reducing higher hydrocarbon content in the fuel feedstock and wherein the deoxidizing bed and the pre-reforming bed are disposed within a common reaction vessel such that the fuel feedstock first passes through the deoxidizing bed and thereafter through the pre-reforming bed. The pre-reforming assembly may further include a propane processor bed for processing propane and propylene in the fuel feedstock, where the propane processor bed is disposed within the common reaction vessel with the deoxidizing bed and the pre-reforming bed.

Abstract: An oxidizer assembly provided with a housing having a plurality of inlets each for receiving a different gas and a plurality of outlets each corresponding to a different one of the inlets and outputting gas resulting from the gas received from its corresponding inlet. A catalyst assembly able to support gas flow therethrough is disposed within the housing and includes a catalyst able to oxidize carbon monoxide gas and to be regenerated. The catalyst assembly is further adapted to be movable such that successive parts of the assembly are able to be brought repeatedly in communication with a first inlet and its corresponding first outlet and then a second inlet and its corresponding second outlet of the housing.

Abstract: A PEM fuel cell system in which an oxidizer is provided and in which the catalyst for the oxidizer is an OMS-2 catalyst and, in particular, an M-OMS-2 catalyst. Preferable catalysts are Co-OMS-2, Cu-OMS-2 and Ag-OMS-2 and, more preferably, Ag-OMS-2. Also, the effectiveness of the oxidizer is enhanced by one or more of the controlled addition of oxidant to the fuel feed and/or oxidizer, controlling the space velocity of the fuel feed and controlling the operating temperature of the oxidizer. A system for regeneration of the M-OMS-2 catalyst and a method of making the catalyst are additionally provided.

Abstract: A fuel processing system and method for processing fuel for a fuel cell having a first adsorbent bed for adsorption of high molecular weight organic sulfur-containing compounds and inorganic sulfur-containing compounds, and a second adsorbent bed for adsorption of low molecular weight organic sulfur-containing compounds, where the adsorbent beds are arranged such that the fuel to be processed passes through one of the adsorbent beds and, thereafter through the other adsorbent bed.