MCM-41负载Pt-Al催化剂的制备及其表征

doi:10.11949/j.issn.0438-1157.20180789

化工学报 ›› 2018, Vol. 69 ›› Issue (S1): 72-79.DOI: 10.11949/j.issn.0438-1157.20180789

• 催化、动力学与反应器 • 上一篇下一篇

MCM-41负载Pt-Al催化剂的制备及其表征

陈秀莹, 谢慧琳, 胡文斌, 周新华, 周红军, 舒绪刚

仲恺农业工程学院化学化工学院, 广州市农用化学品高效利用重点实验室, 广东广州 510225

收稿日期:2018-07-13 修回日期:2018-07-16 出版日期:2018-09-30 发布日期:2018-09-30
通讯作者: 胡文斌,E-mail:wbhu2000@163.com
基金资助:
国家自然科学基金项目（21476272）；广东省自然科学基金项目（2015A030313595）；广东省科技厅项目（2014A010105049，2015A040404044）；惠州市科技项目（2013B050013014）；惠州市大亚湾区科技项目（2015A01007）。

Preparation and characterization of MCM-41 supported Pt-Al catalysts

CHEN Xiuying, XIE Huilin, HU Wenbin, ZHOU Xinhua, ZHOU Hongjun, SHU Xugang

Guangzhou Key Laboratory of Efficient Utilization of Agrochemicals, College of Chemistry and Chemical Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, Guangdong, China

Received:2018-07-13 Revised:2018-07-16 Online:2018-09-30 Published:2018-09-30
Supported by:
supported by the National Natural Science Foundation of China (21476272), the Natural Science Foundation of Guangdong Province (2015A030313595), the Guangdong Science and Technology Department Project (2014A010105049,2015A040404044), the Huizhou Science and Technology Project (2013B050013014) and the Huizhou Daya Bay District Science and Technology Project (2015A01007).

摘要/Abstract

摘要：

以介孔硅MCM-41为载体、无水乙醇为溶剂、氯化铝为促进剂，采用浸渍法制备了Pt-Al/MCM-41催化剂。利用XRD、XPS、TEM、FTIR、N₂吸附-脱附、NH₃-TPD对催化剂进行了表征，重点讨论了不同Pt-Al负载顺序对催化剂结构和性能的影响，并将其应用于硅氢加成反应。结果表明，Pt和Al的负载顺序不同会影响催化剂的有序度、Pt颗粒的分散程度和酸性，其中，Pt-Al/MCM-41催化剂的有序度和Pt颗粒的分散程度相对最好，酸性相对较强。在七甲基三硅氧烷与烯丙醇聚氧乙烯醚的硅氢加成反应中，不同催化剂对七甲基三硅氧烷的转化率影响顺序为Pt-Al/MCM-41 > Pt+Al/MCM-41 > Al-Pt/MCM-41 > Pt/MCM-41。

关键词: 载体, 硅氢加成反应, 氯化铝, 催化, 活性

Abstract:

The Pt-Al/MCM-41 catalysts were prepared by impregnation method, using mesoporous silica MCM-41 as carrier, anhydrous alcohol as dissolvent and AlCl₃ as accelerator. The catalysts were systematically characterized by X-ray diffraction assay, X-ray photoelectron spectroscopy, transmission electron microscopy, Fourier transform infrared spectroscopy, N2 adsorption-desorption and automatic chemical adsorption analyzer. The effects of different Pt-Al interaction sequences on the structure and performance of the catalysts were emphatically discussed, and the catalytic application in hydrosilylation was investigated. The results showed that different Pt-Al interaction sequences had an effect on degree of order and acidity of the catalysts and the dispersion of platinum particle, among them, the Pt-Al/MCM-41 catalyst has the relatively best degree of order, acidity and platinum dispersion. The order of influence of different catalysts on the conversion with reaction time in the hydrosilylation of heptamethyltrisiloxane and allyl polyether is Pt-Al/MCM-41 > Pt+Al/MCM-41 > Al-Pt/MCM-41 > Pt/MCM-41.

Key words: support, hydrosilylation, aluminum chloride, catalysis, reactivity

中图分类号:

TQ426.82

陈秀莹, 谢慧琳, 胡文斌, 周新华, 周红军, 舒绪刚. MCM-41负载Pt-Al催化剂的制备及其表征[J]. 化工学报, 2018, 69(S1): 72-79.

CHEN Xiuying, XIE Huilin, HU Wenbin, ZHOU Xinhua, ZHOU Hongjun, SHU Xugang. Preparation and characterization of MCM-41 supported Pt-Al catalysts[J]. CIESC Journal, 2018, 69(S1): 72-79.

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MCM-41负载Pt-Al催化剂的制备及其表征

Preparation and characterization of MCM-41 supported Pt-Al catalysts

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