关于MoO/SBA-16催化转化合成二碳酸盐的研究
1School of Chemical Engineering, Chongqing University of Technology, Chongqing, China.
Turkish journal of chemistry
|August 25, 2023
概括
该研究开发了MoO3/SBA-16催化剂,用于从二甲基碳酸盐 (DMC) 和乙酸 (PA) 中合成二碳酸盐 (DPC). 最好的催化剂在550°C烧焦,达到78.5%的DMC转化,并且很容易再生.
科学领域:
- 材料科学 材料科学 材料科学
- 催化剂是一种催化剂.
- 化学工程是化学工程的重要组成部分.
背景情况:
- 像SBA-16这样的半孔分子提供了高表面积和可调节的多孔性,用于催化应用.
- 二碳酸盐 (DPC) 是聚碳酸盐生产的关键中间体,高效的合成途径具有重要的工业利益.
- 双甲基碳酸盐 (DMC) 和乙烯酸 (PA) 的转化为DPC合成提供了一个可行的途径.
研究的目的:
- 准备和描述用于DPC合成的MoO3/SBA-16催化剂.
- 为了研究烧温度对催化剂性能的影响.
- 为了优化DMC和PA的转化反应条件.
主要方法:
- 支持SBA-16的热水合成.
- 用MoO3浸SBA-16,然后在不同温度 (550°C,650°C,750°C) 进行化.
- 使用XRD,TG-DTA,XPS,ICP-MS,FT-IR,BET,SEM和TEM进行表征.
- 对DMC和PA转化进行催化试验.
主要成果:
- 在550°C加热的MoO3/SBA-16催化剂表现出最佳的性能.
- 在优化条件下 (Si/Mo=1.0,PA/DMC=2.0,6.0g催化剂,180°C,5小时),DMC转化达到78.5%,甲基碳酸盐 (MPC) 的选择性为51.1%,DPC的选择性为46.5%.
- 催化剂显示出良好的可重复使用性;通过化在550°C的再生恢复了其活性,尽管活性在五个周期后下降.
结论:
- 化温度显著影响DPC合成MoO3/SBA-16的催化活性.
- 在550°C的化MoO3/SBA-16催化剂是有效的DMC和PA转化.
- 催化剂表现出良好的稳定性和可再生性,使其成为工业应用的有希望的候选者.
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