PURPOSE: To obtain high desulfurization efficiency with slight consumption of power by bringing a gas contg. H2S into contact with high-silica zeolite under pressure to adsorb H2S, and desorbing the adsorbed H2S under reduced pressure to regenerate the adsorbent.
CONSTITUTION: A gas contg. H2S is brought into contact with the high-silica zeolite 6 or superfine-grain silica packed in adsorption towers 7a-7c under pressure to adsorb H S, and the adsorbed H2S is desorbed under reduced pressure to regenerate the adsorbent. The zeolite 6 or silica, on which S is gradually deposited in the pressure-swinging H2S removal process over a long period, is heated to a high temp. to release the S and then cooled, and the pressure- swinging H2S removal is performed over a long period. Consequently, the adsorbent is hardly replaced, and high desulfurization efficiency is attained with slight consumption of power.
NAMIKI AKIO
IZUMI JUN
MORIMOTO TAKASHI
TSUTAYA HIROYUKI
