本文讨论了硫化氢在氢氧化物溶液、碱性缓冲溶液和醇胺溶液等碱性介质中吸收反应的机理和动力学,并给出了相应的数学表达式。一般情况下,此吸收反应可以作为瞬时不可逆反应处理。二氧化碳在上述碱性介质中的吸牧反应机理和硫化氢有很大不同,通常为快速或慢速的假一级反应。当硫化氢和二氧化碳混合气体在碱性介质中共吸收时,可利用它们反应机理的不同,选择适当的条件,达到选择性吸收硫化氢的目的。 In this paper, the mechanism and kinetics of hydrogen sulfide absorption in alkaline solution such as hydroxide solution, alkaline buffer solution and alcoholamine solution are discussed. The corresponding mathematical expressions are also given. In general, this absorption reaction can be treated as a transient irreversible reaction. The mechanism of sorption of carbon dioxide in the above alkaline medium is quite different from that of hydrogen sulfide and is usually a fast or slow pseudo first order reaction. When hydrogen sulfide and carbon dioxide gas mixture in the alkaline medium co-absorption, the reaction mechanism can be used in their different, select the appropriate conditions to achieve the selective absorption of hydrogen sulfide purposes.