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首页> 外文期刊>Journal of industrial and engineering chemistry >Hydrochlorination of acetylene to vinyl chloride monomer over bimetallic Au-La/SAC catalysts
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Hydrochlorination of acetylene to vinyl chloride monomer over bimetallic Au-La/SAC catalysts

机译：双金属Au-La / SAC催化剂上乙炔的氯化氢制氯乙烯单体

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摘要

Gold and gold-based bimetallic catalysts for acetylene hydrochlorination were prepared with HAuCl4·4H2O and LaCl3·7H2O as precursors and analyzed by the characterization methods of BET, XRD, SEM, TG and ICP-AES. The results indicate that pitch-based spherical activated carbon SAC is the optimal carrier; Au/C catalyst deactivates easily for coke deposition and the valence change of Au in the reaction, the addition of lanthanum to gold can weaken the occurrence of coke deposition and inhibit the valence change of gold to improve the stability of the catalyst; Under the reaction conditions of temperature 423 K, C2H2 hourly space velocity (GHSV) 360 h~(-1), feed volume ratio V(HC1)/V (C2H2) = 1.15 and Au loading of 1 wt%, the optimal atomic ratio of Au, La (a/a) was 1:3, the conversion of acetylene was up to 98% and the selectivity to VCM was more than 99.8%.
机译：以HAuCl4·4H2O和LaCl3·7H2O为前驱体制备了用于乙炔加氢的金和金基双金属催化剂，并通过BET，XRD，SEM，TG和ICP-AES表征。结果表明，沥青基球形活性炭SAC是最佳载体。 Au / C催化剂容易失焦，导致焦炭沉积，反应中Au的价态变化;向金中添加镧可以减弱焦炭沉积的发生，抑制金的价态变化，提高催化剂的稳定性。在温度423 K，C2H2时空速度（GHSV）360 h〜（-1），反应进料体积比V（HC1）/ V（C2H2）= 1.15，Au负载量为1 wt％（最佳原子比）的条件下Au，La（a / a）的摩尔比为1∶3，乙炔的转化率高达98％，并且对VCM的选择性大于99.8％。

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