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Strategies & Market Trends : SASOL LTD. (SASOY)
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To: IPOJunkie who wrote (14)5/16/1998 3:33:00 PM
From: John M  Read Replies (1) of 27
 
IPO,

Sorry for not getting back sooner. Cobalt catalysts are poisened by H2S and or sulfur compounds. There are many ways to remove these compounds from the feed stream before they become syngas and feed the FT reactor. The most notable application is for refinery bottoms. The bottoms (such as petroleum coke or asphalt) contain up to 5% sulfur by wieght. In a steam reforming process to gasify the material, H2S is made from reaction of sulfur and hydrogen. H2S is removed in an amine/claus plant (technology been around for many years and is perfected). The H2S is converted to sulfur in this process and tankered off for sale. The remaining syngas is free of impurities and ready for FT. There are other ways to form the H2S as well and to remove them. Really not an issue.

Both iron and colbalt FT systems require that the sulfur be removed before the FT reactor. There is really no difference.

JCM
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