空间位阻胺脱硫选择性及再生性能的研究

Desulfurization Selectivity and Regeneration Studies of Sterically Hindered Amines

李云涛 李露露 李辉 张智 徐计雷

LIYuntao LILulu LIHui ZHANGZhi XUJilei

"油气藏地质开发工程"国家重点实验室·西南石油大学, 四川 成都 610500 西南石油大学材料科学与工程学院, 四川 成都 610500

State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, China School of Material Science and Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500, China

设计搭建了一套用于测评空间位阻胺脱硫选择性的装置，在CO存在的条件下考察了3种位阻胺TBE（叔丁氨基乙醇）、TBDEE（叔丁氨基二乙氧基乙醇）和AMP（2-氨基-2-甲基-1-丙醇）水溶液的脱硫选择性和再生性能随时间的变化规律。研究发现，3种位阻胺对HS的吸收率均大于CO，且HS吸收率和脱硫选择性随反应时间的延长呈先增大后减小的变化趋势。TBE具有最好的脱硫选择性，其选择因子在22 min时达到最大值34。最后，通过加热回流的方法对胺液进行解吸再生，考察解吸时间对胺液再生性能的影响。结果表明，胺液经过再生后的脱硫选择性低于新鲜胺液。AMP具有最好的再生性能，经过1 h再生后对HS仍具有85%的吸收率。

A set of devices was designed and constructed for the desulfurization selectivity studies of sterically hindered amines. In the presence of CO, the changing patterns of the desulfurization selectivity and regeneration over time of three aqueous sterically hindered amines-TBE (tert-butylaminoethanol), TBDEE (tert-butylaminodiethoxyethanol), and AMP (2-amino-2-methyl-1-propanol)-were investigated. The results showed that the absorption rate of HS for all three sterically hindered amines was higher than that of CO and the HS absorption rate and desulfurization selectivity initially increased but decreased over prolonged time periods. TBE showed the highest desulfurization selectivity, and its selectivity reached a maximal value of 34 at 22 min. Finally, the desorption regeneration of these amine solutions was carried out via heating reflux, and the effects of desorption duration on the regeneration capacity of amine solutions were studied. The results showed that the desulfurization selectivity of regenerated amine solutions was lower than that of fresh amine. AMP showed the highest regeneration capacity, for which 85% of the absorption rate for HS was retained even after 1 h of regeneration.

10.11885/j.issn.1674-5086.2016.03.23.03