表面胺基修饰的钠基CO2固体吸收剂的脱碳特性研究
关键词 CO2 捕集 钠基吸收剂 氨基修饰 超临界干燥法 溶胶凝胶法
毕业论文设计说明书外文摘要
Title Study on Carbonation Characteristics of Sodium-Based Sorbents with Amino Modification for CO2 Capture
Abstract
Reducing the greenhouse gases’emissions and protecting the humanities’living environment are the key problems that people have to face. Dry alkali metal based sorbents technology for CO2 capture from flue gas has been attracted more attention due to that it is low energy consumption, high recycling efficiency and no corrosion or secondary pollution,.In order to improve the CO2 sorption performance of sodium-based sorbents, a series of sodium-based sorbents modified with amine were prepared by sol-gel method and then dried with conventional/supercritical fluid drying method and the corresponding amine loss ratio and CO2 sorption capacity were investigated. TEOS was chosen as the support precursor and Na2CO3 as the active ingredient and APTES, DETA, TETA and PEI as the amine precursor. Results showed that the sorbent modified with TETA had the highest CO2 sorption capacity if dried with conventional drying method, while the sorbent modified with APTES had the highest CO2 sorption capacity if dried with supercritical fluid drying method.
Keywords CO2 capture sodium-based sorbents amine modification supercritical fluid drying method sol-gel method
目 次
1 引言 1
1.1 研究背景与意义 1
1.2 CO2捕集与封存技术 1
1.2.1 CO2燃烧前捕集技术 2
1.2.3 钙基吸收剂循环煅烧/碳酸化捕集技术 3
1.2.4 燃烧后捕获技术 3
1.3 碱金属基固体吸收剂干法脱碳技术 4
1.4 碱金属基固体吸收剂脱碳的国内外进展 5
1.5本文研究目的和思路 7
2. 实验装置、方法及计算方法 9
2.1 溶胶凝胶法技术 9
2.1.1 溶胶凝胶法的技术发展和制备过程 9
2.1.2 溶胶凝胶法在本实验中的运用 10
2.2超临界干燥法 11
2.3 吸收剂制备及其表征 11
2.4吸收剂固定床测试 14
2.5 吸收剂理论吸收量的计算方法 16
2.5.1 N和Na含量 16
2.5.2 吸收剂理论吸收量计算方法 17
2.6 吸收剂实际吸收量计算方法及误差分析 17
3. 常规干燥法制得的不同氨基修饰的吸收剂脱碳特性 19
3.1 常规干燥复合型钠基吸收剂中N元素含量和Na元素含量 19
3.2 常规干燥复合型钠基吸收剂的的脱碳特性 20
4. 超临界干燥法制得的不同氨基修饰的吸收剂脱碳特性 21