Sulfur poisoning in the nickel catalyzed gasification of activated carbon in hydrogen

✍ Scribed by Akira Tomita; Akira Kimura; Yasuo Ohtsuka; Yasukatsu Tamai

• Publisher: Elsevier Science
• Year: 1983
• Tongue: English
• Weight: 579 KB
• Volume: 21
• Category: Article
• ISSN: 0008-6223
• DOI: 10.1016/0008-6223(83)90084-2

✦ Synopsis

The effect of hydrogen sulfide on the catalytic activity of nickel has been investigated in the hydrogasification of activated carbon. The low-temperature gasification activity in the range of 400-700" C was seriously suppressed when hydrogen sulfide was added to the hydrogen stream. The carbon conversion in this temperature region was approx. X.50.20 and 0% for hydrogen sulfide concentration of 0.20.50 and 100 ppm. respectively. A similar deactivation was observed even in pure hydrogen if the catalyst had been previously treated with hydrogen sulfide. On the other hand, the re~datjon effect was much smaher in the tempe~t~e region higher than 900" C. and the original activity was easily reproduced when the catalyst was exposed to pure hydrogen. The suffur problems in the catalytic gasification of activated carbon are discussed in connection with the gasification of coal.