载体结构对钙钛矿氨分解催化活性的影响

摘要

采用溶胶凝胶法，制备了负载型镍基钙钛矿型催化剂，并在常压微反应装置上对其氨分解催化活性进行了评价。采用BET、XRD、TPR、TEM等方法对催化剂进行表征。研究结果表明，以MCM-41分子筛为载体的催化剂，由于其较大的比表面积和规整的介孔结构，使活性组分能够很好地分散在载体表面，有利于增加有效活性位，提高活性组分的反应能力，表现出很好的氨分解催化活性。以NiO计，负载量为20%的LaNiO₃/MCM-41具有比非负载的LaNiO₃更好的催化活性，这样不仅提高了催化活性，还大大地减少了活性组分用量，降低了生产成本，从而具有很好的应用前景。

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	张园园
	丁彤
	祁晓烨
	马智

关键词：镍基钙钛矿型催化剂氨分解载体 MCM-41

Abstract：

In this work, supported nickel-based perovskite catalysts were prepared by the sol-gel method, and its catalytic activities for ammonia decomposition were evaluated. The structure and surface properties of catalysts were characterized by XRD, TPR, BET and TEM. The results show that the catalyst of LaNiO₃/MCM-41 has good catalytic performance. The effective active sites are increased and the catalytic performance is improved. The catalyst of LaNiO₃/MCM-41 with the loading of 20% NiO has better catalytic performance than that of single LaNiO₃. Not only the catalytic activity can be improved, but also the amount of active component is greatly reduced, thus the production costs are lowered. Above all, LaNiO₃/MCM-41 is promising for application.

Keywords： nickel-based perovskite catalyst； ammonia decomposition； support； MCM-41

Received 2014-05-02;

Corresponding Authors: 丁彤,E-mail:d_tong@tju.edu.cn。 Email: d_tong@tju.edu.cn

About author: 张园园(1985-),女,硕士研究生,主要研究方向为氨分解制氢。

引用本文:

张园园, 丁彤, 祁晓烨, 马智.载体结构对钙钛矿氨分解催化活性的影响[J]. 化学工业与工程, 2016,33(4): 23-27

Zhang Yuanyuan, Ding Tong, Qi Xiaoye, Ma Zhi.Effection of Structure of Support on Ammonia Decomposition[J]. Chemcial Industry and Engineering, 2016,33(4): 23-27

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