改性乙醇胺富集烟道气中CO_2的FTIR研究  

Investigation of FTIR spectra Analysis on Carbon Dioxide Absorption with Improved Amine Solution

作　　者：尹文萱[1,2] 刘建周[1] 高丽平[1] 江晶亮[1] 王志华[1] 

机构地区：[1]中国矿业大学化工学院,江苏徐州221116 [2]煤炭加工与高效洁净利用教育部重点实验室,江苏徐州221116

出　　处：《光谱学与光谱分析》2011年第5期1241-1244,共4页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金项目(20943005);中央高校基本科研业务费专项基金项目(2010LKHX04);中国矿业大学校基金项目(2007B009)资助

摘　　要：以四(3,5-二叔丁基-4-羟基苯基丙酸)季戊四醇酯(抗氧剂1010)、Na2SO3作为乙醇胺(MEA)的氧化降解的改性剂,考察改性MEA富集模拟烟道气中CO2的效果,利用气相色谱、红外光谱分析抗氧剂1010与Na2SO3的适宜用量、比较两种抗氧剂的抗氧化性能。结果表明,抗氧剂1010和亚硫酸钠的添加量在0.15%时效果均较好。红外光谱显示,其再生样品中存在酰胺的C O吸收峰,酰胺在碱性溶液中转变成伯胺,有利于MEA溶剂富集CO2;1010/20%MEA溶液的氧化产物为羧酸,Na2SO3/20%MEA溶液的氧化产物为酰胺,酰胺有利于溶液吸收CO2,Na2SO3的抗氧化性能优于抗氧剂1010。添加抗氧剂后的有机胺的氧化降解程度降低,胺溶液的再生能力显著提高。Carbon dioxide is a major sort of greenhouse gas as well as important carbon resource.With the developments of industries,emission of carbon dioxide has increased sharply.Hence,controls of carbon dioxide emission and resource transformation have become the hotspot of current study.As a new kind of carbon resource,the fields of CO2 research andapplication are very extensive.Among those methods,the amine absorption has good qualities of faster absorption rate,higher efficiency and so on,so it has been widely studied.But organic amine have such shortcomings： high consumption of heat energy,strong corrosive and easy oxidated,now pursuer mainly focused on the organic amine modified.The results showed that,when the time the amount of antioxidant 1010 is 0.15%,the absorption capacity is 2 503.53 mL.the volume of analysis is 982.00 mL,and the absorption rate changes more slowly,by FTIR,Samples of its renewable-OH associating is not apparent that the antioxidant content in 1010,oxidation products of the MEA is acid or less oxidation and antioxidant 1010 product in early to respond fully to form stable non-radical compounds.Therefore,the best dosage of antioxidant 1010 is 0.15%.When the time that the amount of Na2SO3 is 0.15%,the absorption capacity is 2 922.88 mL.Analysis of the volume is 7 23.00 mL,by FTIR,which reveals the oxidation products of the MEA is amide CO which in alkaline solution can be transiting into primary amine,and be easy absorbing CO2.Comparing the antioxygenic proerty of antioxidant 1010 with Na2SO3,from the absorption rate,the amount of absorption,Na2SO3＇s antioxidant properties is superior than antioxidant 1010;by infrared spectral analysis,1010/20% MEA solution＇s oxidation products is the acid,Na2SO3/20% MEA solutions,the oxidation product is amide,amide solution is advantaged for absorbing CO2,So Na2SO3＇s antioxidant properties is superior than antioxidant 1010.

关 键 词：烟道气 有机胺改性 吸附解吸 抗氧剂1010/Na2SO3 

分 类 号：O621.1[理学—有机化学] O623.7[理学—化学]