温度对CO2的影响 吸附到氨基功能化KIT-6吸附剂上
Mariana Suba1, Orsina Verdeș1, Silvana Borcănescu1
1Coriolan Drăgulescu Institute of Chemistry, Mihai Viteazul No.24, 300223 Timișoara, Romania.
Molecules (Basel, Switzerland)
|July 13, 2024
概括
使用氨基三西西兰 (APTES) 的功能化中孔化KIT-6有效吸附二氧化碳 (CO2). 通过APTES移植的KIT-6材料在多个循环中表现出稳定的二氧化碳吸附,显示出气体捕获应用的前景.
科学领域:
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
- 环境科学 环境科学
背景情况:
- 像KIT-6这样的半孔材料为吸附应用提供了很大的表面积.
- 氨基组的功能化是提高二氧化碳吸附能力的常见策略.
- 开发高效和稳定的二氧化碳吸附剂对于减轻温室气体排放至关重要.
研究的目的:
- 合成和描述KIT-6用3-aminopropyltriethoxysilane (APTES) 功能化的.
- 为了研究APTES移植的KIT-6复合材料的二氧化碳吸附-脱附性能.
- 评估氨基组在二氧化碳捕获中的稳定性和效率.
主要方法:
- 半孔二氧化KIT-6的合成.
- 用APTES在110°C的温度下对KIT-6进行移植,其度各不相同 (20,30,40重量%).
- 使用TG/DTA,FT-IR,X射线衍射和N2吸附-脱附的特性.
- 使用温度编程溶解质谱法 (TPD-MS) 进行二氧化碳吸附-溶解研究.
主要成果:
- 通过APTES移植的KIT-6复合材料已成功准备和表征.
- 观察到CO2吸附能力在40°C时为2.23 mmol/g,在70°C时降至0.95 mmol/g.
- 氨基基组对二氧化碳捕获的最高效率是0.512毫摩尔CO2/毫摩尔NH2在40°C.
- 该材料在9个吸附-脱附周期中表现出良好的周期稳定性.
结论:
- 用APTES功能化KIT-6的半孔是捕获二氧化碳的一个有前途的材料.
- 该材料具有显著的二氧化碳吸附能力和良好的可重复使用性.
- 优化移植度和温度可以提高二氧化碳吸附效率.
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