Pd/Al-Al<sub>2</sub>O<sub>3</sub>催化剂用于蒽醌加氢制备过氧化氢

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摘要蒽醌加氢制备H₂O₂是一个具有重大工业价值的反应。采用分步浸渍法制备了一系列不同AlCl₃含量的Pd/xAl-Al₂O₃催化剂。基于N₂吸附脱附、XRD、TEM、NH₃-TPD和XPS对催化剂进行表征分析。AlCl₃质量分数为1%的Pd/1.0Al-Al₂O₃催化剂对蒽醌加氢反应具有较高的加氢效率(8.3 g·L^-1)和选择性(99.5%),明显优于对照Pd/Al₂O₃催化剂(5.2 g·L^-1,97.2%)。表征结果表明AlCl₃改性的催化剂具有丰富的表面弱酸,为蒽醌分子提供了较多的吸附位点。同时,AlCl₃的引入可以改善催化剂的分散度,增加了金属颗粒与载体的相互作用,从而抑制了金属颗粒团聚和流失。

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	袁琴琴
	梁靖岳
	李韡
	张金利
	郭翠梨

关键词：蒽醌加氢 H₂O₂ Pd/Al₂O₃ 氯化铝弱酸

Abstract： Hydrogenation of anthraquinone to produce H₂O₂ is a great important industrial reaction. Here, a series of Pd/xAl-Al₂O₃catalysts with different AlCl₃ contents were prepared by step impregnation method. The catalysts were characterized and analyzed based on XRD, TEM, NH₃-TPD, XPS and N₂ adsorption and desorption. The Pd/1.0Al-Al₂O₃ catalyst with 1% AlCl₃ content exhibits excellent hydrogenation efficiency of 8.3 g·L^-1 and selectivity of 99.5% toward anthraquinone hydrogenation, obviously superior to Pd/Al₂O₃ catalyst (5.2 g·L^-1 and 97.2%). The characterization results show that the catalysts modified by AlCl₃ have abundant surface weak acids, which provide more adsorption sites for anthraquinone molecules. At the same time, the introduction of AlCl₃ could improve the dispersion of metal and increase the interaction between the metal particles and the support, which inhibits the agglomeration and loss of metal particles.

Keywords： anthraquinone hydrogenation H₂O₂ Pd/Al₂O₃ AlCl₃ weak acid

Received 2023-03-08;

Fund:国家自然科学基金(21776215)。

Corresponding Authors: 郭翠梨,研究员,E-mail:gcl@tju.edu.cn。 Email: gcl@tju.edu.cn

About author: 袁琴琴(1998-),女,硕士研究生,主要研究方向为催化剂制备与改性。

引用本文:

袁琴琴, 梁靖岳, 李韡, 张金利, 郭翠梨.Pd/Al-Al₂O₃催化剂用于蒽醌加氢制备过氧化氢[J]. 化学工业与工程, 2023,40(6): 28-36

YUAN Qinqin, LIANG Jingyue, LI Wei, ZHANG Jinli, GUO Cuili.Pd/Al-Al₂O₃ catalyst for anthraquinone hydrogenation to hydrogen peroxide[J]. Chemcial Industry and Engineering, 2023,40(6): 28-36

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