Surface chemical characterization of deactivated low-level mercury catalysts for acetylene hydrochlorination

Chao Liu; Chenhui Liu; Jinhui Peng; Libo Zhang; Shixing Wang; Aiyuan Ma

doi:10.1016/j.cjche.2017.07.002

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Surface chemical characterization of deactivated low-level mercury catalysts for acetylene hydrochlorination

Process Systems Engineering and Process Safety | Updated：2026-01-06

- Surface chemical characterization of deactivated low-level mercury catalysts for acetylene hydrochlorination
- Chinese Journal of Chemical Engineering Vol. 26, Issue 2, Pages: 364-372(2018)
- Affiliations：
  
  1. 2 National Local Joint Laboratory of Engineering Application of Microwave Energy and Equipment Technology,Kunming,China,650093
  2. 3 Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology,Kunming,China,650093
  3. 4 Key Laboratory of Resource Clean Conversion in Ethnic Regions, Education Department of Yunnan Province, Yunnan Minzu University,Kunming,China,650500
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2017.07.002
  CLC：
- Published：2018
- Accepted：
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Chao Liu, Chenhui Liu, Jinhui Peng, Libo Zhang, Shixing Wang, Aiyuan Ma. Surface chemical characterization of deactivated low-level mercury catalysts for acetylene hydrochlorination[J]. Chin.J.Chem.Eng., 2018, 26(2): 364-372.
DOI：

Chao Liu, Chenhui Liu, Jinhui Peng, Libo Zhang, Shixing Wang, Aiyuan Ma. Surface chemical characterization of deactivated low-level mercury catalysts for acetylene hydrochlorination[J]. Chin.J.Chem.Eng., 2018, 26(2): 364-372. DOI： 10.1016/j.cjche.2017.07.002.

摘要

Abstract

Mercury-containing catalysts are widely used for acetylene hydrochlorination in China. Surface chemical characteristics of the fresh low-level mercury catalysts and spent low-level mercury catalysts were compared using multiple characterization methods. Pore blockage and active site coverage caused by chlorine-containing organics are responsible for catalyst deactivation. The reactions of chloroethylene and acetylene with chlorine free radical can generate chlorine-containing organic species. SiO

and functional groups on activated carbon contribute to the generation of carbon deposition. No significant reduction in the total content of mercury was observed after catalyst deactivation

while there was mercury loss locally. The irreversible loss of HgCl

caused by volatilization

reduction and poisoning of elements S and P also can lead to catalyst deactivation. Si

Ca and Fe oxides are scattered on the activated carbon. Active components are still uniformly absorbed on activated carbon after catalyst deactivation.

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