Catalytic combustion of toluene over cerium modified CuMn/Al2O3/cordierite monolithic catalyst

Q3 Energy

燃料化学学报 Pub Date : 2024-01-01 DOI:10.1016/S1872-5813(23)60381-0

Yuhang DAI , Kaige LI , Jinxian ZHAO , Jun REN , Yanhong QUAN

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引用次数: 0

Abstract

Catalytic combustion is an effective approach to remove volatile organic compounds, in which the development of highly active and durable catalyst is extremely crucial. Herein, a series of CuMnCe_x/Al₂O₃/cordierite monolithic catalysts were synthesized by using the ultrasonic-assisted impregnation method. The physicochemical properties were comprehensively characterized via the BET, XRD, SEM, EDX, H₂-TPR, O₂-TPD, XPS and EPR techniques. The results showed that the catalytic activity of CuMnCe_x/Al₂O₃/Cor for toluene combustion was strongly affected by the Ce content. The CuMnCe₂/Al₂O₃/Cor monolithic catalyst showed the best catalytic activity with toluene conversion of 90% at 263 °C under toluene concentration of 1 g/L and space velocity of 78000 mL/(g·h). Meanwhile, the well-dispersed CeO₂ in the CuMn matrix not only improved the content of oxygen vacancies and the mobility of oxygen species, but also enhanced the low-temperature reducibility of the catalyst. Moreover, the CuMnCe₂/Al₂O₃/Cor monolithic catalyst exhibited an excellent stability in the long-term test and cycle ability test.

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铈改性铜锰/Al2O3/堇青石整体催化剂催化燃烧甲苯

催化燃烧是去除挥发性有机化合物的一种有效方法，其中开发高活性、高耐久性催化剂至关重要。本文采用超声波辅助浸渍法合成了一系列 CuMnCex/Al2O3/cordierite 整体催化剂。通过 BET、XRD、SEM、EDX、H2-TPR、O2-TPD、XPS 和 EPR 技术对其理化性质进行了综合表征。结果表明，CuMnCex/Al2O3/Cor 对甲苯燃烧的催化活性受 Ce 含量的影响很大。CuMnCe2/Al2O3/Cor 整体催化剂的催化活性最好，在甲苯浓度为 1 g/L 和空间速度为 78000 mL/(g-h) 的条件下，263 ℃ 的甲苯转化率为 90%。同时，CuMn 基体中分散良好的 CeO2 不仅提高了氧空位的含量和氧物种的流动性，还增强了催化剂的低温还原性。此外，CuMnCe2/Al2O3/Cor 整体催化剂在长期试验和循环能力试验中表现出了极佳的稳定性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

燃料化学学报 Chemical Engineering-Chemical Engineering (all)

CiteScore

2.80

自引率

0.00%

发文量

5825

期刊介绍： Journal of Fuel Chemistry and Technology (Ranliao Huaxue Xuebao) is a Chinese Academy of Sciences(CAS) journal started in 1956, sponsored by the Chinese Chemical Society and the Institute of Coal Chemistry, Chinese Academy of Sciences(CAS). The journal is published bimonthly by Science Press in China and widely distributed in about 20 countries. Journal of Fuel Chemistry and Technology publishes reports of both basic and applied research in the chemistry and chemical engineering of many energy sources, including that involved in the nature, processing and utilization of coal, petroleum, oil shale, natural gas, biomass and synfuels, as well as related subjects of increasing interest such as C1 chemistry, pollutions control and new catalytic materials. Types of publications include original research articles, short communications, research notes and reviews. Both domestic and international contributors are welcome. Manuscripts written in Chinese or English will be accepted. Additional English titles, abstracts and key words should be included in Chinese manuscripts. All manuscripts are subject to critical review by the editorial committee, which is composed of about 10 foreign and 50 Chinese experts in fuel science. Journal of Fuel Chemistry and Technology has been a source of primary research work in fuel chemistry as a Chinese core scientific periodical.