Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture – Carbon dioxide or hydrogen sulfide component
Patent
1998-05-06
1999-11-09
Yoon, Tae
Chemistry of inorganic compounds
Modifying or removing component of normally gaseous mixture
Carbon dioxide or hydrogen sulfide component
42324303, 42324402, 423570, 481987, B01D 5348, B01D 5334
Patent
active
059808462
ABSTRACT:
This invention relates to a gas refining system wherein a high-temperature and high-pressure reducing gas is introduced into a fixed-bed desulfurizer packed with an adsorbent by which sulfur compounds contained in the high-temperature and high-pressure reducing gas are adsorbed and removed in the form of a sulfide, and the adsorbent having the sulfide adsorbed thereon is regenerated by roasting it with a regenerating gas containing oxygen, characterized in that the gas refining system is equipped with oxygen concentration control means for controlling the oxygen concentration in the regenerating gas introduced into the desulfurizer so as to keep the internal temperature of the desulfurizer during the regeneration reaction within the allowable temperature range of the adsorbent. This invention includes an embodiment in which the exhaust gas obtained after the regeneration reaction gas is brought into contact with a calcium compound-containing slurry to recover gypsum is recycled to the desulfurizer for use as the regenerating gas for the adsorbent. Thus, the adverse effect of the heat of regeneration reaction on the adsorbent used in the fixed-bed desulfurizer can be avoided positively and easily.
REFERENCES:
patent: 4478800 (1984-10-01), Van Der Wal
patent: 4533531 (1985-08-01), Shinoda et al.
patent: 5154900 (1992-10-01), Nakayama et al.
Inoue Kenji
Kimura Kazuaki
Sera Toshikuni
Susaki Makoto
Tatani Atsushi
Mitsubishi Jukogyo Kabushiki Kaisha
Yoon Tae
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