低性HKUST-1/聚合物挤出剂用于PSA分离CO2/CH4
Muhamad Tahriri Rozaini1,2, Denys I Grekov2, Mohamad Azmi Bustam1
1Centre of Research in Ionic Liquids, CORIL, Chemical Engineering Department, Universiti Teknologi Petronas, Bandar Seri Iskandar 32610, Perak, Malaysia.
Molecules (Basel, Switzerland)
|May 11, 2024
概括
用热塑性聚氨 (TPU) 等疏水性粘合剂塑造金属有机框架 (MOF) HKUST-1 增强了其水分稳定性和气体吸附性. 这种方法提高了气体分离柱的性能.
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.
- 吸附科学 吸附科学
背景情况:
- 像HKUST-1这样的金属有机框架 (MOF) 是有效的吸附剂,但需要为工业应用进行后成型.
- 由于HKUST-1对水分的敏感性会降低其结构,限制其在潮湿的环境中使用.
- 开发稳定,有形的MOF吸附剂对于固定床分离过程至关重要.
研究的目的:
- 为了研究将HKUST-1粉末挤出成颗粒,使用疏水性热塑性聚氨 (TPU) 作为粘合剂.
- 为了提高HKUST-1.的水分稳定性和气体分离性能.
- 将HKUST-1/TPU复合材料的性能与使用水友性粘合剂 (聚乳酸,PLA) 的复合材料进行比较.
主要方法:
- 用TPU和PLA粘合剂挤出HKUST-1.使用TPU和PLA粘合剂.
- 使用X射线衍射 (XRD),热重力测量分析 (TGA),扫描电子显微镜与能量分散式X射线光谱学 (SEM-EDS) 和N2吸附异热法进行表征.
- 在各种温度和压力下测量气体吸附量 (CO2和CH4).
- 通过在潮湿条件下的老化分析进行湿度稳定性测试.
主要成果:
- HKUST-1/TPU挤出剂保留了HKUST-1的晶体结构,并显示出良好的热稳定性.
- 与原始的HKUST-1相比,复合材料的纹理特性基本上没有受到影响.
- 无论是HKUST-1/TPU还是HKUST-1/PLA,都显示出与原始HKUST-1相比,二氧化碳和CH4吸附能力增加.
- 在HKUST-1/TPU表现出优越的水分稳定性,在三个月后,二氧化碳吸附量仅减少了10%,而HKUST-1/PLA的25%和原始HKUST-1的54%相比.
结论:
- 使用疏水粘合剂 (TPU) 挤出是一种有效的方法,用于塑造像HKUST-1这样的MOF粉末.
- HKUST-1/TPU复合材料表现出增强的湿度稳定性,使其适用于气体分离应用.
- 这种方法提供了一个可行的策略,用于开发强大的MOF基吸附剂,用于工业气体分离柱.
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