Method and apparatus for desulfurizing fuel gas
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United States of America Patent
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Jun 23, 1998
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app pub date -
May 31, 1996
filing date -
May 31, 1996
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Abstract
Sulfur and sulfur compounds are removed from a gas stream, such as a hydrocarbon fuel gas stream so as to render the gas stream suitable for use in a fuel cell power plant. Natural gas and recycled hydrogen enters the hydrodesulfurizer assembly at a temperature of about 120.degree. F. The gas stream is heated to a temperature of about 625.degree. F. whereupon it enters a desulfurizing bed formed from a mixture of platinum catalyst deposited on alumina pellets, and a pelletized zinc oxide hydrogen sulfide absorbent. The gas is cooled to an exit temperature of about 525.degree.F. as it passes through the desulfurizer bed. The desulfurizer bed is combined with a shift converter which reduces carbon monoxide in the desulfurized gas stream after the latter has passed through a steam reformer bed.
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