摘要：用浸渍法将四乙烯五胺（TEPA）、多乙烯多胺（DYXDA）分别负载到凹凸棒石（ATP）上，制备出两种不同的氨基改性吸附剂，分别记作TEPAn-ATP和DYXDAn-ATP。利用傅里叶变换红外光谱(FT-IR)、热重分析(TGA)和扫描电镜（SEM）等分析方法对样品进行了表征，并考察了负载量、吸附温度、水分等对CO2吸附性能的影响。结果表明，吸附剂对CO2的吸附容量随吸附温度的升高先增大后减小，在60℃时吸附效果最好；CO2吸附容量随氨基改性剂浸渍量的增加而增大，在60℃时，TEPA60-ATP对CO2吸附容量可高达1。8315mmol/g；当有水分存在时，两种氨基改性吸附剂对CO2的吸附容量都明显增大；CO2流速对吸附剂的吸附性能无明显影响；吸/脱附循环实验显示， DYXDAn-ATP具有更好的吸附稳定性。90734

毕业论文关键词：凹凸棒土，四乙烯五胺，多乙烯多胺，CO2吸附

Abstract: The attapulgite(ATP) adsorbents modified were prepared with triethylenetetramine (TETA) and polyethylenepolyamine(DYXDA) under the same loading amount, respectively。 The two different adsorbents were described as TEPAn-ATP and DYXDAn-ATP, respectively。 The prepared samples were characterized by Fourier transform infrared spectroscopy (FT-IR) , thermogravimetric analysis (TGA) , scanning electron microscopy (SEM) and so on。 Meanwhile, the effects of the loading amount, adsorption temperature, moisture and other effects on the adsorption capacity of CO2  were investigated。 The results showed that the adsorption capacity of CO2 increased firstly and then decreased with the increase of temperature。 The adsorption effect was best at 60 ℃。 The adsorption capacity of CO2 increased with the increase of soaking amount of amino modifier。 At 60 ℃, the adsorption capacity of TEPA60-ATP to CO2 can be as high as 1。8315mmol/g。 When there was water, the adsorption capacity of CO2 modified by two kinds of amino modifier can increase obviously。 The CO2 velocity had no obvious influence on the adsorption properties of adsorbent。 The absorption / desorption cycle experiments showed that DYXDAn-ATP had better adsorption stability。

Key words：attapulgite,tetraethylenepentamine, polyethylenepolyamine,CO2 adsorption

目录

1 文献综述 3

1。1 前言 3

1。2 常用 CO2分离捕集方法 3

1。3 CO2分离吸附剂的研究进展 4

1。4吸附材料氨基化改性的方法 5

1。5 基于氨基改性的吸附剂的研究进展 6

1。6 凹凸棒土的概述和性能 9

1。7 本文研究目的、路线及内容 9

2 实验部分 10

2。1 实验原料 10

2。2 吸附剂的制备 10

2。3 吸附剂的表征 10

2。4 CO2吸附性能的测定 11

3 结果与讨论 12

3。1吸附剂的表征 12

3。2 TEPAn-ATP与DYXDAn-ATP的CO2吸附性能 17

结论 22

参考文献 23

致谢 26

1 文献综述

1。1 前言

地球温室效应是世界各国共同关注的环境问题之一，温室效应主要是因为处于现代化工业社会，煤炭、石油和天然气等燃料会被过多燃烧并且放出大量的二氧化碳气体进入大气中。温室效应会导致全球气温升高、海平面上升、病虫害增多和沙漠化面积增大等问题，从而会破坏自然生态平衡，对地球上生物的生存和发展构成威胁。