The removal of H2S derived from livestock farm on activated carbon modified by combinatory method of high-pressure hydrothermal method and impregnation method

摘要

H2S is considered as the main gas pollutant from livestock farm and activated carbon (AC) is widely used as adsorbent for H2S. This paper focuses on the influence of modification conditions and operation conditions on the H2S adsorption performance on AC samples. The H2S adsorption performance on modified AC (MAC) samples by single and combinatory method has been investigated. It is concluded that the MAC by combinatory method of high-pressure hydrothermal method followed by alkaline solution impregnation method could promote the H2S adsorption performance remarkably. The H2S adsorption performance differs with different operation conditions. Meanwhile the samples of fresh AC and exhausted AC have been characterized using BET, FTIR, TPD and Boehm titration method. The experimental results are confirmed that the characteristics of AC have significant influence on the adsorption ability for H2S.