Exploring new solvents for efficient acid gas removal is one of the most attractive topics in industrial gas purification. Herein, using 2-tertiarybutylamino-2-ethoxyethanol as an absorbent in a packed column at atmospheric pressure was examined for selective absorption of H₂S from mixed gas streams. In the present work, the acid gas load, H₂S absorption selectivity, acid gas removal ratio, amine solution regeneration performance, and corrosion performance were investigated through evaluating experiments absorbing H₂S and CO₂ by using methyldiethanolamine and 2-tertiarybutylamino-2-ethoxyethanol. The experimental results illustrate that the H₂S absorption selective factors were 3.88 and 15.81 by using 40% methyldiethanolamine and 40% 2-tertiarybutylamino-2-ethoxyethanol at 40 °C, respectively, showing that 2-tertiarybutylamino-2-ethoxyethanol is an efficient solvent for selective H₂S removal, even better than methyldiethanolamine. Based on the consideration of cost, we added 5% TBEE to 35% MDEA to form a blended aqueous solvent. To our satisfaction, the blended amine solvent obtained a 99.79% H₂S removal rate and a 22.68% CO₂ co-absorption rate, while using the methyldiethanolamine alone achieved a 98.33% H₂S removal rate and a 23.52% CO₂ co-absorption rate; the blended solvent showed better H₂S absorption efficiency and selectivity. Taken together, this work provides valuable information for a promising alkanolamine for acid gas removal, and the preliminary study has found that the aqueous blend of methyldiethanolamine and 2-tertiarybutylamino-2-ethoxyethanol is an efficient solvent for selective H₂S removal, which not only extends the application field for sterically hindered amines, but also opens up new opportunities in blended solvent design.

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仲链烷醇胺选择性吸收混合气中H2S的研究与性能评价

探索有效去除酸性气体的新溶剂是工业气体净化中最具吸引力的课题之一。在此，研究了在大气压下使用 2-叔丁基氨基-2-乙氧基乙醇作为填充塔中的吸收剂，以从混合气流中选择性吸收 H _{2 S。}本工作通过甲基二乙醇胺和2-叔丁基氨基-2吸收H ₂ S和CO ₂的实验评价研究了酸性气体负荷、H ₂ S吸收选择性、酸性气体去除率、胺溶液再生性能和腐蚀性能。-乙氧基乙醇。实验结果表明，H ₂使用 40% 甲基二乙醇胺和 40% 2-叔丁基氨基-2-乙氧基乙醇在 40 °C 下的 S 吸收选择因子分别为 3.88 和 15.81，表明 2-叔丁基氨基-2-乙氧基乙醇是选择性去除 H ₂ S 的有效溶剂，甚至优于甲基二乙醇胺。基于成本的考虑，我们在35%的MDEA中加入5%的TBEE，形成混合水溶剂。令我们满意的是，混合胺溶剂获得了 99.79% 的 H ₂ S 去除率和 22.68% 的 CO ₂共吸收率，而单独使用甲基二乙醇胺获得了 98.33% 的 H ₂ S 去除率和 23.52% CO ₂共吸收率。吸收率; 混合溶剂表现出更好的H ₂S吸收效率和选择性。综上所述，这项工作为有前途的烷醇胺去除酸性气体提供了有价值的信息，初步研究发现，甲基二乙醇胺和 2-叔丁基氨基-2-乙氧基乙醇的水性混合物是选择性去除 H ₂ S 的有效溶剂，而不是不仅扩展了位阻胺的应用领域，而且为混合溶剂的设计开辟了新的机遇。