Abstract: Various activated amine solutions are used in current nature gas pretreatment. Among them，the most commonly used are activated MDEA amine solutions. As single amine solution has its own disadvantage，five kinds of activated MDEA amine solutions (MDEA+MEA，MDEA+DEA，MDEA+TEA，MDEA+DETA and MDEA+TETA) were studied experimentally in order to analyze absorption performance comparatively，including absorption rate，and absorption loading. MDEA added with MEA and DEA had higher absorption loading and got better decarbonization efficiency. MDEA mixed with DETA and TETA could enhance reaction rate significantly，but its reaction was be retarded by high acid gas loading. MDEA mixed with TEA had the lowest reaction rate. This paper plays positive role on industrial application of mixed amine.

Key words: methyldiethanolamine(MDEA), carbon dioxide, active amine, absorption

摘要： 目前天然气预处理工业中存在各种不同类型的胺液活化剂，不同的胺液活化剂具有各自的优缺点，其中，最常用的是甲基二乙醇胺（MDEA）的活化胺液。本文通过实验研究了以MDEA为主吸收剂，添加5种不同种类胺液活化剂（MEA、DEA、TEA、DETA、TETA）的吸收性能，包括吸收速率、吸收负荷等，并对实验结果进行了对比分析。实验结果表明：在本文实验条件下，MDEA与伯胺、仲胺的混合胺液吸收负荷较高，综合脱碳效果较好；MDEA与烯胺的混合胺液可以显著提高反应速率，但会受到胺液中CO2负荷的影响；TEA吸收速率最慢，不适合做MDEA的活化剂。本文研究内容为混合胺液工业应用提供了技术指导。

关键词: 甲基二乙醇胺, 二氧化碳, 活化胺液, 吸收