FSP制过渡金属(Co、Mn、Cu或Zn)掺杂La2O3材料负载的甲烷干重整Ni催化剂

IF 1.3 Q3 ENGINEERING, CHEMICAL
Phakampai Aunmunkong, C. Chaisuk
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引用次数: 3

摘要

采用火焰喷雾热解(FSP)技术制备了掺杂过渡金属(Co、Mn、Cu或Zn)的La2O3材料。采用XRD、N2物理吸附、TPR、H2化学吸附和TGA对负载在该材料上的2 wt.% Ni催化剂进行了表征,并用甲烷干重整法(DRM)对催化剂进行了评价。引入Co或Mn均可形成钙钛矿结构。Cu可生成La2CuO4尖晶石相,Zn则为La2O3、ZnO和La(OH)3的混合相。Ni/Co- la2o3催化剂对DRM的活性更强,因为Ni和Co金属的活性双位点大量分散在催化剂表面。反应过程中La2O2CO3的生成可以抑制焦炭的生成。La2O2CO3与MnO相在Ni/Mn-La2O3催化剂中的协同作用是减少催化剂表面积碳的促进作用。用少量的锰部分取代Co可以提高催化活性和产物收率。Ni/Mn0.05Co0.95-La2O3催化剂具有最高的CH4转化率、H2产率和H2/CO比。在LaCoO3的钙钛矿结构中插入的Mn是改变晶格内氧迁移率以保持催化剂高性能的重要因素。版权所有©2021作者,BCREC集团出版。这是一篇基于CC BY-SA许可(https://creativecommons.org/licenses/by-sa/4.0)的开放获取文章。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
The Ni Catalyst Supported on the FSP-made Transition Metal (Co, Mn, Cu or Zn) Doped La2O3 Material for the Dry Reforming of Methane
The transition metal (Co, Mn, Cu or Zn) doped La2O3 material was prepared by flame spray pyrolysis (FSP) technique. The 2 wt.% Ni catalyst supported on this material was characterized by XRD, N2 physisorption, TPR, H2 chemisorption and TGA, and evaluated by the dry reforming of methane (DRM). The perovskite structure was certainly formed when either Co or Mn was introduced. The Cu can generate the La2CuO4 spinel phase while the Zn showed a mixed phase of La2O3, ZnO and La(OH)3. The Ni/Co-La2O3 catalyst was more active for the DRM because of high amount of active dual sites of Ni and Co metals dispersed on the catalyst surface. The formation of La2O2CO3 during the reaction can inhibit the coke formation. The cooperation of La2O2CO3 and MnO phases in the Ni/Mn-La2O3 catalyst was promotional effect to decrease carbon deposits on the catalyst surface. The partial substitution of Co for Mn with a small content of Mn can enhance the catalytic activity and the product yield. The Ni/Mn0.05Co0.95-La2O3 catalyst showed the highest CH4 conversion, H2 yield and H2/CO ratio. The Mn inserted into the perovskite structure of LaCoO3 was an important player to change oxygen mobility within the crystal lattice to maintain a high performance of the catalyst. Copyright © 2021 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0). 
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来源期刊
CiteScore
3.20
自引率
6.70%
发文量
52
审稿时长
12 weeks
期刊介绍: Bulletin of Chemical Reaction Engineering & Catalysis, a reputable international journal, provides a forum for publishing the novel technologies related to the catalyst, catalysis, chemical reactor, kinetics, and chemical reaction engineering. Scientific articles dealing with the following topics in chemical reaction engineering, catalysis science and engineering, catalyst preparation method and characterization, novel innovation of chemical reactor, kinetic studies, etc. are particularly welcome. However, articles concerned on general chemical engineering process are not covered and out of scope of this journal
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