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Nano Research 2023, 16(5): 6178-6186 https://doi.org/10.1007/s12274-022-5237-y
Research Article | Issue | Published: 07 December 2022

Free radicals induced ultra-rapid synthesis of N-doped carbon sphere catalyst with boosted pyrrolic N active sites for efficient acetylene hydrochlorination

Show Author's Information Yuxiang Bao1,  Xiuhui Zheng1,  Jianlin Cao1,  Shuo Li4,  Yongxiao Tuo1,  Xiang Feng1( ),  Mingyuan Zhu4,  Bin Dai3,  Chaohe Yang1,  De Chen1,2( )
State Key Laboratory of Heavy Oil Processing, China University of Petroleum (East China), Qingdao 266580, China
Department of Chemical Engineering, Norwegian University of Science and Technology, Trondheim 7491, Norway
School of Chemistry and Chemical Engineering of Shihezi University, Shihezi 832000, China
College of Chemistry & Chemical Engineering of Yantai University, Yantai 264005, China
Keywords:
nitrogen-doped carbon, polymerization, free radical, acetylene hydrochlorination, ultrasonic chemistry
Topics:
Catalysts
Cite this article:
Bao Y, Zheng X, Cao J, et al. Free radicals induced ultra-rapid synthesis of N-doped carbon sphere catalyst with boosted pyrrolic N active sites for efficient acetylene hydrochlorination. Nano Research, 2023, 16(5): 6178-6186. https://doi.org/10.1007/s12274-022-5237-y
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Abstract Full text Electronic supplementary material About this article

Activated carbon-supported HgCl2 catalysts have seriously impeded the development of the polyvinyl chloride (PVC) industry due to the sublimation of Hg species and environmental pollution problems. Herein, the template-free and organic solvent-free strategy was devised to synthesize non-metallic based nitrogen-doped carbon (U-NC) sphere catalyst for acetylene hydrochlorination. This green strategy via ultrasonic chemistry initiates resin crosslinking reactions between aminophenol and formaldehyde resin by free radicals, leading to the ultra-rapid formation of U-NC with remarkably high pyrrolic N content in only 5 min. This U-NC catalyst exhibited an outstanding space-time-yield (1.6 gVCM·gcat−1·h−1), even comparable to the reported metallic catalyst. By combining kinetic analysis, advanced characterizations, and density functional theory, it is found that the amount of pyrrolic N is in linear with C2H2 conversion, and pyrrolic N in U-NC can effectively improve acetylene hydrochlorination performance by mediating HCl adsorption. This work sheds new light on rationally constructing metal-free catalyst for acetylene hydrochlorination.


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Electronic supplementary material
About this article

Free radicals induced ultra-rapid synthesis of N-doped carbon sphere catalyst with boosted pyrrolic N active sites for efficient acetylene hydrochlorination

Show Author's information Yuxiang Bao1, Xiuhui Zheng1, Jianlin Cao1, Shuo Li4, Yongxiao Tuo1, Xiang Feng1( ), Mingyuan Zhu4, Bin Dai3, Chaohe Yang1, De Chen1,2( )
State Key Laboratory of Heavy Oil Processing, China University of Petroleum (East China), Qingdao 266580, China
Department of Chemical Engineering, Norwegian University of Science and Technology, Trondheim 7491, Norway
School of Chemistry and Chemical Engineering of Shihezi University, Shihezi 832000, China
College of Chemistry & Chemical Engineering of Yantai University, Yantai 264005, China

Abstract

Activated carbon-supported HgCl2 catalysts have seriously impeded the development of the polyvinyl chloride (PVC) industry due to the sublimation of Hg species and environmental pollution problems. Herein, the template-free and organic solvent-free strategy was devised to synthesize non-metallic based nitrogen-doped carbon (U-NC) sphere catalyst for acetylene hydrochlorination. This green strategy via ultrasonic chemistry initiates resin crosslinking reactions between aminophenol and formaldehyde resin by free radicals, leading to the ultra-rapid formation of U-NC with remarkably high pyrrolic N content in only 5 min. This U-NC catalyst exhibited an outstanding space-time-yield (1.6 gVCM·gcat−1·h−1), even comparable to the reported metallic catalyst. By combining kinetic analysis, advanced characterizations, and density functional theory, it is found that the amount of pyrrolic N is in linear with C2H2 conversion, and pyrrolic N in U-NC can effectively improve acetylene hydrochlorination performance by mediating HCl adsorption. This work sheds new light on rationally constructing metal-free catalyst for acetylene hydrochlorination.

Keywords: nitrogen-doped carbon, polymerization, free radical, acetylene hydrochlorination, ultrasonic chemistry

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Acknowledgements

Publication history

Received: 04 September 2022
Revised: 22 October 2022
Accepted: 24 October 2022
Published: 07 December 2022
Issue date: May 2023

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© Tsinghua University Press 2022

Acknowledgements

Acknowledgements

This work was supported by the National Natural Science Foundation of China (No. 21978325), Innovation Research Projects (Nos. 20CX06072A, 20CX06095A, and 20CX06096A), the Natural Science Foundation of Shandong Province (Nos. ZR2020KB006 and ZR2020YQ17), and the Science and Technology Project of Xinjiang Bingtuan Supported by Central Government (No. 2022BC001).

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