Nitrogen and phosphorus co-doped activated carbon induces high density Cu+ active center for acetylene hydrochlorination

doi:10.1016/j.cjche.2023.01.017

Abstract

Abstract: This work aims to solve the problems of low reaction activity of Cu-based catalysts and agglomeration of active centers in acetylene hydrochlorination. Cu-based catalysts supported by NP co-doped activated carbon (AC) with different content (mCu-xNP/AC) were manufactured and applied in the acetylene hydrochlorination reaction. It was found that the doping of carriers N and P induced the transformation of Cu²⁺ to Cu⁺, and the catalytic activity was markedly improved. Under the optimal reaction temperature of 220 ℃, the gas hourly space velocity (GHSV) of C₂H₂ was 90 h^-1 and V_HCL : V_C₂H₂ was 1.15. The initial activity of the 5%Cu-30NP/AC catalyst reached 95.59%. Through some characterization methods showed the addition of N and P improved the dispersion of Cu in carbon, which increased the ratio of Cu⁺/Cu²⁺. The measurement results confirmed that the chemisorption capacity of mCu-xNP/AC for C₂H₂ decreased slightly, and the chemisorption capacity for HCl increased significantly, which was the reason for the increased activity of the catalyst. The conclusion provides a reference for the development of acetylene hydrochlorination Cu catalyst.

Key words: Acetylene hydrochlorination, Cu-based catalysts, Catalytic activity, Heterogeneous catalysis, N and P co-doped

摘要： This work aims to solve the problems of low reaction activity of Cu-based catalysts and agglomeration of active centers in acetylene hydrochlorination. Cu-based catalysts supported by NP co-doped activated carbon (AC) with different content (mCu-xNP/AC) were manufactured and applied in the acetylene hydrochlorination reaction. It was found that the doping of carriers N and P induced the transformation of Cu²⁺ to Cu⁺, and the catalytic activity was markedly improved. Under the optimal reaction temperature of 220 ℃, the gas hourly space velocity (GHSV) of C₂H₂ was 90 h^-1 and V_HCL : V_C₂H₂ was 1.15. The initial activity of the 5%Cu-30NP/AC catalyst reached 95.59%. Through some characterization methods showed the addition of N and P improved the dispersion of Cu in carbon, which increased the ratio of Cu⁺/Cu²⁺. The measurement results confirmed that the chemisorption capacity of mCu-xNP/AC for C₂H₂ decreased slightly, and the chemisorption capacity for HCl increased significantly, which was the reason for the increased activity of the catalyst. The conclusion provides a reference for the development of acetylene hydrochlorination Cu catalyst.

关键词: Acetylene hydrochlorination, Cu-based catalysts, Catalytic activity, Heterogeneous catalysis, N and P co-doped

Fei Li, Xuemei Wang, Pengze Zhang, Qinqin Wang, Mingyuan Zhu, Bin Dai. Nitrogen and phosphorus co-doped activated carbon induces high density Cu⁺ active center for acetylene hydrochlorination[J]. Chinese Journal of Chemical Engineering, 2023, 59(7): 193-199.

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Nitrogen and phosphorus co-doped activated carbon induces high density Cu⁺ active center for acetylene hydrochlorination

Nitrogen and phosphorus co-doped activated carbon induces high density Cu⁺ active center for acetylene hydrochlorination

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