离子液体溶剂法吸收CO2的基础研究
文献类型：学位论文
| 作者 | 赵延松 |
| 学位类别 | 硕士 |
| 答辩日期 | 2011-05-24 |
| 授予单位 | 中国科学院研究生院 |
| 导师 | 张香平 ; 张锁江 |
| 关键词 | 离子液体 CO2吸收 热力学性质 传质 |
| 其他题名 | Fundamental Research on CO2 Capture Using Ionic Liquids |
| 学位专业 | 化学工程 |
| 中文摘要 | 近年来，随着全球温室效应日趋严重，CO2吸收越来越受到人们的重视。目前，应用较为广泛的CO2吸收方法是醇胺法，但醇胺法吸收CO2存在着溶剂损耗较大、能耗高、设备腐蚀比较严重等缺点。由于离子液体具有挥发性低、稳定性好、循环利用性好等优点，用其吸收CO2可以降低能耗、减少溶剂损失、改善对设备的腐蚀性，因此近年来离子液体吸收CO2受到国内外学者的广泛关注。研究发现文献报道的大多数离子液体吸收CO2存在着成本较高、传质性能相对较差等问题。针对这些问题，本研究中合成了一系列低成本的功能化离子液体，并将其配制成离子液体溶剂，用离子液体溶剂法吸收CO2，其目的是降低吸收剂成本、粘度和解吸能耗，改善传质性能。论文的主要研究内容和取得的结果如下： 1. 合成8种新型低成本功能化离子液体，并用红外、核磁等表征其结构，热重考察其热稳定性。测定了离子液体及离子液体溶剂等16个吸收体系的密度、粘度等主要基础物性数据。从20多种离子液体溶剂中经过筛选，根据不同体系的物性数据及吸收CO2能力，最终综合考虑筛选出最优离子液体溶剂MCHP。进行离子液体溶剂MCHP吸收及解吸CO2的条件优化实验，考察温度、压力、溶剂组分配比等条件对吸收及解吸CO2的影响。离子液体溶剂MCHP对钢材腐蚀性测定，结果表明MCHP对碳钢和不锈钢基本无腐蚀性，性能优于醇胺。 2. 研究离子液体[MDEA]Cl(其为MCHP的组分)与不同常见气体的气液相平衡实验,实验结果表明[MDEA]Cl吸收CO2的选择性较好。 3. 研究离子液体与离子液体溶剂吸收CO2的传质实验。考察了温度、压力、气体体积流量、吸收时间和分布器类型等对离子液体及离子液体溶剂吸收CO2过程中气泡速度、气泡速度直径、气含率、气液传质面积和气液传质系数的影响，最终总结出离子液体与离子液体溶剂吸收CO2过程中的传质规律，为以后离子液体及离子液体溶剂吸收CO2的工艺设计提供了一定的理论基础。 |
| 英文摘要 | With the deterioration of climate change, CO2 capture has become more and more important in recent years. The main technology for CO2 capture is amines absorption method, which has been widely used in industries. However, there are some disadvantages of amines methods, such as amines solvents loss, high energy consumption, high corrosion and so on. Ionic liquids with lower solvent loss, high stability and recyable properties, have shown many advantages for CO2 capture in resent years, such as reducing energy consumption, cutting amines solvents loss and decreasing corrosion properties. However, it is also recognized that the cost and mass transfer properties of CO2 capture with ionic liquids is not as excellent as expected. Therefore, in this work, a series of low cost ionic liquids and ionic liquids solvents have been synthesized for CO2 capture. The objective of CO2 capture by ionic liquids solvents is to reduce the cost of CO2 capture, decreasing the viscosity of solvents and improve the mass transfer properties. The major work and innovative results for this dissertation are listed as follows. 1. 8 low cost ionic liquids are synthesized and characterized by FT-IR, HNMR and TGA. Density and viscosity of 16 ionic liquids and ionic liquids solvents systems were measured an obtained. The proper ionic liquids solvent MCHP was selected from more than 20 ionic liquids solvents according to the CO2 capture abilities and physical properties of ionic liquids. Experimental conditions optimization of CO2 capture and desorption by ionic liquids solvent MCHP were carried out. In this work, the effects of temperature, pressure and mass fraction on CO2 capture and desorption were investigated. Corrosion of ionic liquids solvents MCHP on steel was investigated, which shows that there is no obvious corrison on carbon steel and stainless steel and the corrosion property is better than amines. 2. Phase equilibra experiments of ionic liquids [MDEA]Cl was investigated, which manifested that the CO2 capture selection of [MDEA]Cl is excellent. 3. Mass transfer experiments of CO2 capture by ionic liquids and ionic liquids solvents were carried out. In this work, effects of temperature, pressure, gas volume flow rate, CO2 capture time and type of distributor on bubble velocity, bubble diameter, gas holdup, specific interfacial area and mass transfer coefficient in the process of CO2 capture by ionic liquids and ionic liquids solvents were investigated, which is useful to the further study on CO2 capture by ionic liquids solvents in large scale. |
| 语种 | 中文 |
| 公开日期 | 2013-09-24 |
| 页码 | 131 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/1726]  |
| 专题 | 过程工程研究所_研究所（批量导入） |
| 推荐引用方式 GB/T 7714 | 赵延松. 离子液体溶剂法吸收CO2的基础研究[D]. 中国科学院研究生院. 2011. |
入库方式： OAI收割
来源：过程工程研究所
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