石油化工高等学校学报

石油化工高等学校学报 ›› 2021, Vol. 34 ›› Issue (4): 21-26.DOI: 10.3969/j.issn.1006-396X.2021.04.004

• 石油化工 • 上一篇    下一篇

可控条件对钾铈镧氧化物催化氧化碳烟颗粒的影响

孟秀红1(), 张乐1, 梁雪珍2, 段晓静1, 林文杰3, 段林海1()   

  1. 1.广东石油化工学院,广东省劣质油加工重点实验室,广东 茂名 525000
    2.广西工业职业技术学院 通识教育学院,广西 南宁 530001
    3.正和集团股份有限公司,山东 东营 257300
  • 收稿日期:2021-05-17 修回日期:2021-05-31 出版日期:2021-08-25 发布日期:2021-09-18
  • 通讯作者: 段林海
  • 作者简介:孟秀红(1977⁃),女,博士,副教授,从事催化材料及其表面物理化学方面研究;E⁃mail: mengxiuh@163.com
  • 基金资助:
    广东省自然科学基金项目“贫燃条件下NOx和PM同时去除的催化剂设计和反应机理研究”(2018A030307058);广东石油化工学院校级人才引进项目(2020RC039)

Effect of Controllable Reaction Conditions on Catalytic Oxidation of Soot Particles by Potassium⁃Cerium⁃Lanthanum Composite Oxide

Xiuhong Meng1(), Le Zhang1, Xuezhen Liang2, Xiaojing Duan1, Wenjie Lin3, Linhai Duan1()   

  1. 1.Key Laboratory of Inferior Crude Oil Processing of Guangdong Provincial Higher Education Institutes,Guangdong University of Petrochemical Technology,Maoming Guangdong 525000,China
    2.College of General Studies,Guangxi Vocational & Technical Institute of Industry,Nanning Guangxi 530001,China
    3.Zhenghe Group Company Limited,Dongying Shandong 257300,China
  • Received:2021-05-17 Revised:2021-05-31 Published:2021-08-25 Online:2021-09-18
  • Contact: Linhai Duan

摘要:

采用柠檬酸络合燃烧法制备得到钾铈镧复合氧化物催化剂,利用程序升温反应(TPR),研究了各反应条件对催化剂活性的影响,考察并确定了催化氧化碳烟颗粒过程中各反应条件的最优水平,并对各反应条件在催化剂活性中的贡献大小进行了分析和讨论。结果表明,尾气中O2体积分数的升高,剂碳比的增大,都有利于碳烟颗粒的催化氧化。在碳烟氧化过程中,升温速率较低更有利于催化剂催化性能的提高。水的存在会使钾铈镧复合氧化物催化剂发生部分失活,但该失活现象经干燥后,有可再生性。钾铈镧复合氧化物对一定范围内尾气流量波动具有良好的包容性。各可控反应条件对钾铈镧复合氧化物催化活性的贡献大小为:剂碳比>接触方式>升温速率>水的存在>O2体积分数>尾气流量。

关键词: 催化剂, 碳烟颗粒, 环境保护, 反应条件, 活性

Abstract:

Potassium?cerium?lanthanum composite oxide catalyst was prepared by citric acid complexing combustion method.The influence of reaction conditions on catalyst activity was studied by temperature programmed reaction (TPR).The optimal reaction conditions during catalytic oxidation process of soot particles were investigated and determined.The contribution of each reaction condition to catalyst activity was analyzed and compared.The results show that the increase of O2 concentration and catalyst?carbon ratio in exhaust gas are beneficial to the catalytic oxidation of soot particles.In the process of soot oxidation, the lower heating rate is more beneficial to improve the catalytic performance of the catalyst.The existence of water will partially deactivate the K?Ce?La composite oxide catalyst,which can be regenerated after drying.K?Ce?La composite oxide has good tolerance to the fluctuation of exhaust gas flow in a certain range.The contributions of reaction conditions to the catalytic activity of K?Ce?La composite oxides are as follows:catalyst?carbon ratio>contact mode>heating rate>water content>O2 concentration>tail gas flow rate.

Key words: Catalyst, Soot particles, Environment protection, Reaction conditions, Reactivity

中图分类号: 

引用本文

孟秀红, 张乐, 梁雪珍, 段晓静, 林文杰, 段林海. 可控条件对钾铈镧氧化物催化氧化碳烟颗粒的影响[J]. 石油化工高等学校学报, 2021, 34(4): 21-26.

Xiuhong Meng, Le Zhang, Xuezhen Liang, Xiaojing Duan, Wenjie Lin, Linhai Duan. Effect of Controllable Reaction Conditions on Catalytic Oxidation of Soot Particles by Potassium⁃Cerium⁃Lanthanum Composite Oxide[J]. Journal of Petrochemical Universities, 2021, 34(4): 21-26.

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