可循环胺类用于烟气脱硫吸收剂的实验研究

发布时间：2017-12-28 16:11

本文关键词：可循环胺类用于烟气脱硫吸收剂的实验研究　出处：《石油学报(石油加工)》2017年06期 　论文类型：期刊论文

【摘要】：在水相中,将二乙烯三胺(DETA)、三乙烯四胺(TETA)、四羟丙基乙二胺(EDTP)、四甲基乙二胺(TEMED)、三乙烯二胺(TEDA)分别与磷酸(H_3PO_4)等摩尔反应,制得不同胺类烟气脱硫吸收剂。结果表明,吸收剂EDTP/H_3PO_4对SO_2具有良好的吸收和解吸性能,对SO_2有效吸收容量为0.342mol/L;脱硫率大于98%;解吸率均大于90%;可多次重复循环使用;富液pH值为4.30±0.02,贫液pH值为5.45±0.02。此外,EDTP/H_3PO_4可选择性吸收CO_2+SO_2混合气中的SO_2,富液中SO_3~(2-)和HSO_3~-的氧化率与时间呈线性关系,富液对金属的腐蚀性不满足GB 6944-2005危险类别4.2项要求。
[Abstract]:In the aqueous phase, two amine three amine (DETA), three ethylene four amine (TETA), four hydroxypropyl ethylenediamine (EDTP), four methyl ethylenediamine (TEMED), three ethylene two amine (TEDA) were phosphorylated with phosphoric acid (H_3PO_4) respectively. The results showed that the absorbents EDTP/H_3PO_4 had good absorption and desorption properties for SO_2, the effective absorption capacity for SO_2 was 0.342mol/L, the desulphurization rate was more than 98%, the desorption rate was over 90%, and it could be repeated for many times. The pH value of the rich liquid was 4.30 + 0.02, and the pH value of the lean solution was 5.45 + 0.02. In addition, EDTP/H_3PO_4 can selectively absorb SO_2 in CO_2+SO_2 mixture. The oxidation rate of SO_3~ (2-) and HSO_3~- in liquid rich is linear with time. The corrosion of rich liquid to metals does not meet 4.2 requirements of GB 6944-2005 risk categories.
【作者单位】：青岛科技大学化工学院;
【基金】：泰山学者专项经费项目(ts201511033)资助
【分类号】：X701.3
【正文快照】： 2015年中国环境状况公报表明,中国SO2排放总量居世界首位[1]。根据新修订的国家标准GB13271-2014(《锅炉大气污染物排放标准》)的要求,现有燃煤机组自2014年7月1日起,SO2排放限值为200 mg/m3。如能把烟气脱除的SO2回收,不但改善我国硫资源短缺,硫酸、硫磺依赖进口的现状[2],而

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