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Frontiers of Chemical Science and Engineering >> 2011, Volume 5, Issue 3 doi: 10.1007/s11705-010-0569-7

PSS sorbents for removing trace hydrogen sulfide in methane

1. Qingdao University of Science & Technology, Qingdao 266042, China; 2. High Pressure Adsorption Laboratry, Tianjin University, Tianjin 300072, China

Available online: 2011-09-05

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Sorbents of the pressure swing sorption process (PSS) to remove trace amount of H S (190 ppm) contained in methane were experimentally studied. The sorbents consist of adsorbent carrier (silica gel or activated carbon) and absorbent which spreads outside the carrier granules’ pores (triethanolamine, TEA or -methyl-2-pyrrolidone, NMP). The results of breakthrough and regeneration tests show that silica gel is more suitable to be the carrier than activated carbon and TEA is more suitable to be the absorbent than NMP. The loaded absorbent could enlarge the sorption capacity of H S considerably. And the BET tests indicate that the absorbent deposits on the surface of the carrier’s pores and can reduce the mesopores’ size and block the micropores.

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