Characteristics of the sustained release of Cu-Al spinel pretreated by different methods for hydrogen production from methanol steam reforming

Q3 Energy

燃料化学学报 Pub Date : 2025-07-01 DOI:10.1016/S1872-5813(24)60523-2

Kunyun WU , Shiyu SU , Xia WANG , Yingqi ZHAO , Caishun ZHANG , Jiao HAN , Yuehong ZHANG , Xiaoning HOU , Lei ZHANG , Zhixian GAO

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引用次数: 0

Abstract

In this paper, three methods, namely hydrothermal, Al modification and acid washing, were used to modify Cu-Al spinel catalyst, and then the catalysts were characterized by XRD, BET, H₂-TPR and XPS techniques. In conjunction with the performances of methanol steam reforming, the effects of surface composition and structure on the catalytic behaviors of the sustained release process were investigated. The results showed that new crystalline phase formed and surface species changed after the hydrothermal treatment, while Al-modification and acid-treated catalysts didn't change the crystalline phase composition, but the surface Al/Cu ratio and the distribution of Cu species changed. Based on the characterization data of the released Cu, it could be inferred that all the three treatments led to variations of the microscopic surface structure, thus exhibiting different sustained release catalytic behaviors. Specifically, the hydrothermal treatment enhanced the catalytic activity, while Al-modification and acid-treated catalysts showed inferior activity but showing obvious sustained release behavior. The findings of this paper provide a basis for further studies on the surface modification of the Cu-Al spinel catalyst.

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甲醇蒸汽重整制氢不同方法预处理铜铝尖晶石的缓释特性

本文采用水热法、Al改性法和酸洗法对Cu-Al尖晶石催化剂进行了改性，并用XRD、BET、H2-TPR和XPS技术对催化剂进行了表征。结合甲醇蒸汽重整的性能，研究了表面组成和结构对甲醇蒸汽重整催化行为的影响。结果表明：水热处理后形成了新的晶相，改变了表面组分，而Al改性和酸处理后的催化剂没有改变晶相组成，但改变了表面Al/Cu比和Cu组分的分布。根据释放Cu的表征数据，可以推断三种处理都导致了微观表面结构的变化，从而表现出不同的缓释催化行为。其中，水热处理提高了催化剂的催化活性，而al改性和酸处理的催化剂活性较低，但表现出明显的缓释行为。本文的研究结果为进一步研究Cu-Al尖晶石催化剂的表面改性提供了基础。

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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.