四乙烯五胺活化N-甲基二乙醇胺溶液吸收CO_2  

Absorption of CO_2 into solution of N-methyldiethanolamine activated by tetraethylenetetramine

作　　者：高涵[1] 郭亚平[1] 褚联峰[1] 郭亚军[1] 

机构地区：[1]上海师范大学化学系,上海200234

出　　处：《化学工程》2011年第9期30-33,65,共5页Chemical Engineering(China)

摘　　要：研究了四乙烯五胺(TEPA)与N-甲基二乙醇胺(MDEA)混合溶液在总胺浓度一定时,TEPA浓度对CO2吸收情况的影响,考察了吸收过程中尾气摩尔分数、吸收速率、吸收物质的量及吸收时间的相互关系;并比较了TEPA与二乙烯三胺(DETA)、三乙烯四胺(TETA)对MDEA吸收CO2的活化作用,考察了3种烯胺在吸收与解吸循环条件下的综合脱碳能力。实验结果表明:增大TEPA浓度可提高TEPA+MDEA体系吸收能力;相比DETA和TETA,TEPA作为活化剂可使混胺溶液具有更高的吸收速率和吸收物质的量;在有解吸同时进行的吸收过程中,TEPA脱碳能力仍好于其他2种烯胺。The absorption efficiency of CO2 into the aqueous solution of tetraethylenetetramine（TEPA）＋N-methyldiethanolamine（MDEA） under a certain total concentration of amines was investigated.The relations of tail gas mole fraction,absorption rate,absorption capacity and absorption time were studied.The activities of diethylenetriamine（DETA）,triethylenetetramine（TETA） and TEPA for CO2 absorption were also compared.The decarburization capacity of the three enamines was investigated when regeneration existed.The results indicate that the absorption capacity of TEPA＋MDEA is enhanced by increasing the concentration of TEPA.The absorption rate and capacity of amines containing TEPA as activator are higher than those with TETA and DETA.The decarburization capacity of TEPA＋MDEA is also better than the other two enamines blending with MDEA when absorption and regeneration are carried out synchronously.

关 键 词：吸收 CO2 TEPA MDEA 解吸 

分 类 号：TE644[石油与天然气工程—油气加工工程]