Phnsncl4-N Supported on Activated Carbon as Novel Tin-Based Catalysts for Acetylene Hydrochlorination

Wu, Yibo; Cui, Longjie; Zhang, Rong; Pei, Rujing; Hu, Shiqing; Han, Ruyue; Yang, Huimin; Li, Fuxiang; Xue, Jiang; Lv, Zhen

doi:10.21577/0100-4042.20170390

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“…Despite the initial activity of tin-based catalysts is close to traditional mercury-based acetylene hydrochlorination catalysts, there is still an ongoing study in prolonging the lifetime. The tin-based acetylene hydrochlorination catalysts can be classified into three categories: bimetallic or multimetallic tin-based catalysts [2][3][4][5][6][7][8], organotin-based catalysts [9][10][11] and tin complex-based catalysts [4,12]. Given the easily sublimation of SnCl4 under industrially relevant process conditions [2], the efficient durability of SnCl4/AC in acetylene hydrochlorination can be prolonged by the incorporation of BiCl3 and CoCl2 [8].…”

Section: Introductionmentioning

confidence: 99%

“…Given the easily sublimation of SnCl4 under industrially relevant process conditions [2], the efficient durability of SnCl4/AC in acetylene hydrochlorination can be prolonged by the incorporation of BiCl3 and CoCl2 [8]. Moreover, the Kocheshkov redistribution reaction of SnCl4 and Ph3ClSn can further improve the catalytic behavior of SnCl4/AC [10]. Later on, Guo et al founded that the synergistic effect of SnCl2, ZnCl2 and Tb4O7 can strengthen stability of SnCl2/AC in acetylene hydrochlorination [5].…”

Section: Introductionmentioning

confidence: 99%

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Sn(II)/PN@AC catalysts: synthesis, physical-chemical characterization, and applications

Li³

et al. 2021

Turk J Chem

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In this study, the novel tin-based catalysts (Sn(II)/PN@AC) were prepared using the phosphorus and nitrogen dual-modified activated carbon as support and SnCl2 as active compounds, as well as then evaluated in acetylene hydrochlorination.Under the reaction temperature of 180°C and an acetylene gas hourly space velocity (GHSV-C2H2) of 30 h -1 , the 15%Sn(II)/PN@AC-550 showed the initial acetylene conversion of 100% and vinyl chloride selectivity over 98.5%. Additionally, the deactivation rate of 15%Sn(II)/PN@AC-550 reached 0.47%•h -1 , which was lower than that of 15%Sn(II)/AC-550 (1.02%•h -1 ), suggesting that PN@AC-550 as novel 2 support can retarded the deactivation of Sn(II)/AC-550 catalysts during acetylene hydrochlorination. Based on the catalytic tests and characterization results (XRD, Raman, BET surface area, TEM, C2H2-TPD, H2-TPR, XPS, FT-IR, TGA and ICP), it demonstrated that PN@AC-550 as support could effectively improve the dispersion of tin species, retard the formation of coke deposition, lessen the oxidation of SnCl2 during the preparation process, as well as relatively inhibit the leach of tin species during the reaction. By combing the FTIR results and Rideal-Eley mechanism, we proposed that that HSnCl3 was transition state of SnCl2 in catalysis acetylene hydrochlorination and then adsorbed the acetylene to produce the vinyl chloride.

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