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	乙醇胺热降解-氧化降解循环过程及SO_2在其中的影响
	孙晨辰 ; 王淑娟 ; 周姗 ; SUN Chenchen ; WANG Shujuan ; ZHOU Shan
	2016-03-30 ; 2016-03-30
关键词	乙醇胺 热降解 氧化降解 循环过程 二氧化硫 monoethanolamine thermal degradation oxidative degradation cycle SO 2 X51
其他题名	Monoethanolamine thermal-oxidative degradation in CO_2 capture process and the effect of SO_2
中文摘要	使用半连续式不锈钢搅拌反应釜,研究了质量分数30%的乙醇胺(MEA)水溶液(CO2负载量0.4 mol·mol-1)的热降解-氧化降解循环过程,旨在探讨循环过程对MEA降解的影响,以及SO2对MEA热降解、氧化降解和循环过程产生的影响.其中,热降解的实验条件为120℃,降解时间为2周,在密闭反应器内进行;氧化降解的实验条件为55℃,约121.59 kPa,向溶液中持续通入模拟烟气,总气量为7.5 L·min-1,其中包括2%CO2、0~150 ppm SO2和空气.实验结果表明,在先进行热降解再进行氧化降解的过程中,MEA的热降解产物N-(2-羟乙基)乙二胺等会在氧化降解的过程中发生进一步反应,且原本氧化降解中生成的亚硝酸根会有部分进一步被氧化,生成硝酸根.在循环过程中,MEA的整体降解程度比单独进行热降解、氧化降解实验中有所提高.研究表明,添加亚硫酸根会加剧热降解中的氨气生成量,而在氧化降解中,SO2又表现出了明显的抑制作用.在循环过程中,这两者均有体现,SO2仍起到一定的抑制降解的作用.; We studied thermal-oxidative degradation of 30% aqueous monoethanolamine( MEA) with 0.4 mol·mol-1CO 2 loading during CO 2 capture process.This work aimed at studying the thermal-oxidative cycle and SO 2 effect on MEA degradation during the entire process.For thermal degradation, MEA was degraded at 120 ℃ in an airtight reactor for 2 weeks; for oxidative degradation,MEA was degraded with 7.5 L·min-1mixed gas( Air /2% CO 2 /0 ~ 150 ppm SO 2) under 55 ℃ and 121.59 kPa; for the thermal-oxidative cycle,250 g thermal-degraded MEA was mixed with 300 g fresh MEA for the oxidation.Degraded samples were analyzed by ion chromatography( IC).It was suggested that MEA thermal degradation product N-( 2-hydroxyethyl)-ethylenediamine( HEEDA) was consumed in the oxidative process and MEA oxidative product nitrite was further oxidized into nitrate with the thermal-oxidative cycle.Besides,MEA total degradation rate increased with the cycle.SO 2 may exacerbate the generation of ammonia in thermal degradation,and is a potent inhibitor of oxidative degradation.SO 2 has multiple effects during the thermal-oxidative cycle process.
语种	中文 ; 中文
内容类型	期刊论文
源URL	[http://ir.lib.tsinghua.edu.cn/ir/item.do?handle=123456789/144876]
专题	清华大学
推荐引用方式 GB/T 7714	孙晨辰,王淑娟,周姗,等. 乙醇胺热降解-氧化降解循环过程及SO_2在其中的影响[J],2016, 2016.
APA	孙晨辰,王淑娟,周姗,SUN Chenchen,WANG Shujuan,&ZHOU Shan.(2016).乙醇胺热降解-氧化降解循环过程及SO_2在其中的影响..
MLA	孙晨辰,et al."乙醇胺热降解-氧化降解循环过程及SO_2在其中的影响".(2016).

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