High temperature hydrogen sulfide adsorption on activated carbon - I. Effects of gas composition and metal addition

Carbon
By: , and 

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Abstract

Various types of activated carbon sorbents were evaluated for their ability to remove H2S from a simulated coal gas stream at a temperature of 550 ??C. The ability of activated carbon to remove H2S at elevated temperature was examined as a function of carbon surface chemistry (oxidation, thermal desorption, and metal addition), and gas composition. A sorbent prepared by steam activation, HNO3 oxidation and impregnated with Zn, and tested in a gas stream containing 0.5% H2S, 50% CO2 and 49.5% N2, had the greatest H2S adsorption capacity. Addition of H2, CO, and H2O to the inlet gas stream reduced H2S breakthrough time and H2S adsorption capacity. A Zn impregnated activated carbon, when tested using a simulated coal gas containing 0.5% H2S, 49.5% N2, 13% H2, 8.5% H2O, 21% CO, and 7.5% CO2, had a breakthrough time of 75 min, which was less than 25 percent of the length of breakthrough for screening experiments performed with a simplified gas mixture of 0.5% H2S, 50% CO2, and 49.5% N2.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title High temperature hydrogen sulfide adsorption on activated carbon - I. Effects of gas composition and metal addition
Series title Carbon
DOI 10.1016/S0008-6223(00)00010-5
Volume 38
Issue 13
Year Published 2000
Language English
Publisher Elsevier Science Ltd
Publisher location Exeter, United Kingdom
Larger Work Type Article
Larger Work Subtype Journal Article
Larger Work Title Carbon
First page 1757
Last page 1765