高等学校化学学报Issue(7)：1515-1522,8.DOI:10.7503/cjcu20140108
离子液体和醇胺溶液复配脱硫剂吸收 H2S 及再生性能
H2 S Absorption Capacity of Ionic Liquid-MDEA-H2 O Combined Desulfurizers
摘要
Abstract
Three kinds of functionalized ionic liquids [Bmim]HCO3 , [TMG]L and [MEA]L were synthe-sized. The structure and thermostability of the synthetic ionic liquids(ILs) were confirmed by FTIR spectrum and thermogravimetry characterization, respectively. The new combined desulfurizers were prepared by mixing ionic liquid([Bmim]HCO3 , [TMG]L, [MEA] L, [Bmim] Cl or [Bmim] BF4 ) with methyldiethanolamine (MDEA) aqueous solution according to certain proportion. Under conditions of different ionic liquids, absorp-tion temperature and desulfurizer composition, H2 S absorption and bubble eliminating capacity of the desulfu-rizer were measured, and regeneration performance of the favorable desulfurizer was studied. The concentra-tion of SO4 2- in regenerated desulfurizer was analyzed by ion chromatography after deep oxidation by O3 , and the mechanism of absorption was analyzed based on the calculations from density functional theory. The results show that absorption capacity is in the sequence of [ Bmim] Cl-MDEA-H2 O >[ Bmim] HCO3-MDEA-H2 O >[Bmim]BF4-MDEA-H2 O>MDEA-H2 O>[TMG]L-MDEA-H2 O>[MEA]L-MDEA-H2 O, and the major factor is attributed to the stability of IL-MDEA; [ Bmim] HCO3 performs the best capacity of bubble elimination;[Bmim]Cl-MDEA-H2 O, [Bmim]HCO3-MDEA-H2 O and [Bmim]BF4-MDEA-H2 O can be nearly completely regenerated by air, and high stability of IL-H2 S leads to higher absorption efficiency, but smaller extent of regeneration.关键词
硫化氢/离子液体/N-甲基二乙醇胺/脱硫剂/密度泛函理论Key words
H2 S/Ionic liquid/Methyldiethanolamine(MDEA)/Desulfurizer/Density functional theory分类
化学化工引用本文复制引用
马云倩,王睿..离子液体和醇胺溶液复配脱硫剂吸收 H2S 及再生性能[J].高等学校化学学报,2014,(7):1515-1522,8.基金项目
国家自然科学基金(批准号:21276144)、教育部科技重点项目(批准号:109094)及博士点基金优先发展领域课题(批准号:20110131130001)资助. Supported by the National Natural Science Foundation of China(No.21276144), the Scientific Key Project from Chinese Ministry of Educa-tion, China( No.109094) and the Ph. D. Program Project for Priority Development Field from Chinese Ministry of Education, China ( No.20110131130001) （批准号:21276144）
