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Abstract <p>Non-metallic carbonaceous materials, among numerous non-mercury catalysts, display great prospects for acetylene hydrochlorination, which are mainly attributed to their wide source of raw materials, low price and easy adjustment of chemical structure. Although the abundant functional groups on the surface of carbon materials may affect the progress of acetylene hydrochlorination, the research on the catalytic mechanism is still scarce. In the present study, biomass-derived-carbon material contained many heteroatoms was prepared by hydro-thermal treatment using kitchen waste onion as raw material. The obtained carbon catalyst enabled excellent catalytic activity with the highest acetylene conversion of 96.4% at an acetylene gas hourly space velocity (GHSV) of 30 h<sup>–1</sup>, which was attributed to the high contents of pyridine–N, graphite–N and –C=O. Among them, the high contents of pyridine–N and –C=O species provided abundant alkaline sites, which enhanced the adsorption and activation ability of catalyst for HCl. Simultaneously, the abundant graphite-N species acted as the adsorption site to activate C<sub>2</sub>H<sub>2</sub>, thus together accelerating the process of acetylene hydrochlorination. This work provides an innovative idea to design the environment-friendly carbon-based catalysts for acetylene hydrochlorination.</p>

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Acetylene Hydrochlorination Catalyzed by Biochar Material from Onions

  • 期刊论文

  • 发表日期：

    2025年6月1日

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  • Qingxin Wu,
  • Dan Zhang,
  • Jian Li,
  • Xueying Wang,
  • Haiyang Zhang,
  • Jinli Zhang,
  • Yanzhao Dong

摘要

Abstract

Non-metallic carbonaceous materials, among numerous non-mercury catalysts, display great prospects for acetylene hydrochlorination, which are mainly attributed to their wide source of raw materials, low price and easy adjustment of chemical structure. Although the abundant functional groups on the surface of carbon materials may affect the progress of acetylene hydrochlorination, the research on the catalytic mechanism is still scarce. In the present study, biomass-derived-carbon material contained many heteroatoms was prepared by hydro-thermal treatment using kitchen waste onion as raw material. The obtained carbon catalyst enabled excellent catalytic activity with the highest acetylene conversion of 96.4% at an acetylene gas hourly space velocity (GHSV) of 30 h–1, which was attributed to the high contents of pyridine–N, graphite–N and –C=O. Among them, the high contents of pyridine–N and –C=O species provided abundant alkaline sites, which enhanced the adsorption and activation ability of catalyst for HCl. Simultaneously, the abundant graphite-N species acted as the adsorption site to activate C2H2, thus together accelerating the process of acetylene hydrochlorination. This work provides an innovative idea to design the environment-friendly carbon-based catalysts for acetylene hydrochlorination.