Preparation of copper-based biochar adsorbent with outstanding H2S adsorption capacity and study on H2S removal

In this study, a H 2 S adsorbent with outstanding adsorption capacity and low cost based on the hybrid of biochar and copper was prepared for the removal of gaseous H 2 S. The effects of preparation parameters and process parameters on desulfurization performance on the developed adsorbent, and the mechanism and kinetics of H 2 S removal were studied systematically. The regeneration performance of Cu2.56WRS300 adsorbent after H 2 S adsorption and its mercury removal performance after deactivation were also tested. The results show that although copper loading is not conducive to the development of physical structure of the adsorbent, it promotes the formation of a large number of copper oxide adsorption sites on surface of the adsorbent, which greatly increasing H 2 S adsorption capacity. Under the optimized tested conditions, the best H 2 S adsorption capacity on the Cu2.56WRS300 adsorbent is up to 1191.1 mg/g, which is far more than most similar adsorbents. The chemisorption are the decisive step of the H 2 S adsorption process . The inactivated Cu2.56WRS300 adsorbent shows good regeneration ability and better Hg 0 removal performance than commercial activated carbon. This study provides a new idea for the development of cost-effective H 2 S adsorbent.