Preparation of metal-free nitrogen-doped activated carbon as catalysts for carbon dioxide reforming of methane

被引：0

作者：

Qin X. ^{[1
,2
]}

Zhang G. ^{[1
,2
]}

Li S. ^{[1
,2
]}

Guo X. ^{[1
,2
]}

Yan H. ^{[1
,2
]}

Xu Y. ^{[1
,2
]}

Liu J. ^{[1
,2
]}

机构：

[1] State Key Laboratory of Clean and Efficient Coal Utilization, Taiyuan University of Technology, Taiyuan

[2] Key Laboratory of Coal Science and Technology, Ministry of Education, Taiyuan University of Technology, Taiyuan

来源：

Huagong Jinzhan/Chemical Industry and Engineering Progress | 2021年 / 40卷 / 06期

关键词：

Activated carbon; Catalyst; CO[!sub]2[!/sub] reforming of CH[!sub]4[!/sub; Greenhouse gas; Nitrogen doping;

D O I：

10.16085/j.issn.1000-6613.2020-1318

中图分类号：

学科分类号：

摘要：

Nitrogen-doped activated carbon was prepared by modifying activated carbon with nitric acid and urea. The effects of pore structure, nitrogen content and nitrogen species (pyridine nitrogen, pyrrole nitrogen and quaternary nitrogen) on the catalytic performance of CO2 reforming of CH4 were investigated. The physicochemical properties of the catalysts before and after the reaction were characterized by BET, SEM, EA, FTIR, XPS, CO2-TPD and TG. The types of the nitrogen-containing functional groups introduced on the surface of activated carbon and their roles in the reforming process were analyzed. Compared with the unmodified activated carbon, the nitrogen-doped activated carbon (AC-U.NA) simultaneously introduced more hydroxyl and nitrogen-containing functional groups. Especially, the content of pyridine nitrogen functional groups in AC-U.NA was significantly increased, which provided more active sites for CO2 reforming of CH4. The initial conversion of CH4 and CO2 was 55.94% and 66.46%, respectively. At the same time, the prepared AC-U.NA surface had polarity, which was conducive not only to the adsorption and activation of the acidic CO2 molecules, but also to the carbon elimination reaction of CO2, and hence reduced the carbon deposition, which is of great significance to the activity and anti-carbon deposition of the prepared metal-free reforming catalyst. © 2021, Chemical Industry Press Co., Ltd. All right reserved.

引用

页码：3203 / 3214

页数：11

共 52 条

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