HYDROGEN GAS SEPARATION METHOD AND SEPARATION APPARATUS
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United States of America Patent
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Issued Date -
Jan 7, 2010
app pub date -
Oct 31, 2007
filing date -
Nov 8, 2006
priority date (Note) -
Abandoned
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Abstract
A method is provided for separating hydrogen gas from a mixed gas obtained by autothermal reforming reaction of hydrocarbon-based material in which air is added. In this method, by pressure swing adsorption using adsorption towers (A-C) each filled with an adsorbent, a cycle is repeatedly performed, including an adsorption step of introducing the mixed gas into the adsorption tower to adsorb unnecessary gas contained in the mixed gas by the adsorbent to discharge product gas with high hydrogen gas concentration from the adsorption tower, and a desorption step of desorbing the unnecessary gas from the adsorbent to discharge the unnecessary gas from the adsorption tower. The adsorbent includes a 10 to 50% filling percentage of activated carbon-based first adsorbent (D) arranged in the adsorption tower at an upstream portion in the flow direction of the mixed gas and a 90 to 50% filling percentage of zeolite-based second adsorbent (E) arranged in the adsorption tower at a downstream portion in the flow direction.
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