Effect of Catalytic Factors of Activated Carbon and Gas Stream Properties on H2S Catalytic Conversion

Abstract

Catalyst-loaded activated carbons are the widely used adsorbents to remove H2S for purification of the gas streams. Virgin carbon, single, and mixed catalyst-loaded carbon are used as adsorbents. Their performance of H2S catalytic conversion was studied by evaluating their breakthrough curves in order to investigate the effect of catalyst contents, categories, assistant catalysts, and virgin carbon properties on the H2S adsorption. The effects of gas stream properties on H2S catalytic adsorption are also investigated. The results show the H2S u amount is increased with catalyst contents, and the assistant catalysts can enhance H2S catalytic conversion. NaOH-loaded carbon has better catalytic performance than KOH-loaded carbon with the same contents. Carbons after impregnation keep a relative high-pore volume between 2 and 20 nm, which is beneficial to give full play to the catalysis. The relative humidity and oxygen can enhance the H2S adsorption capacity and play important roles in H2S adsorption. CTC has little effects on the impregnated carbon for H2S catalytic conversion. Carbon impregnated with a specific catalyst can accelerate target substance adsorption and will restrict the pore volume for organics adsorption.