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首页> 外文期刊>Catalysis science & technology >Non-mercury catalytic acetylene hydrochlorination over activated carbon-supported Au catalysts promoted by CeO2
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Non-mercury catalytic acetylene hydrochlorination over activated carbon-supported Au catalysts promoted by CeO2

机译：Non-mercury催化乙炔氢氯化反应在激活carbon-supported盟催化剂由CeO2

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摘要

Gold-cerium oxide catalysts were prepared to study the effects of cerium oxide additives on the catalytic performance of gold catalysts for acetylene hydrochlorination, using activated carbon as the support. The optimal catalytic performance is achieved over the 1Au-5CeO(2)/AC catalyst with an acetylene conversion of 98.4% and a selectivity to vinyl chloride monomer (VCM) of 99.9% after 20 h on stream under the conditions of 180 degrees C, C2H2 gas hourly space velocity (GHSV) of 852 h(-1) and HCl/C2H2 feed volume ratio of 1.15. It is indicated that the addition of cerium oxide can make active Au species uniformly dispersed and improve the adsorption properties of reactants on the catalysts, but also suppress the reduction of active gold species and inhibit coke deposition on the catalyst surfaces during the reaction. Characterization was carried out using transmission electron microscopy, Raman spectroscopy, N-2 adsorption/desorption analysis, thermogravimetric analysis, temperature-programmed reduction, temperature-programmed desorption, powder X-ray diffraction, atomic absorption spectroscopy and X-ray photoelectron spectroscopy.
机译：Gold-cerium氧化物催化剂研究的准备的铈氧化物添加剂的影响金催化剂的催化性能乙炔氢氯化反应,使用激活碳的支持。性能达到了1 au-5ceo(2) /交流催化剂的乙炔转化率98.4%和氯乙烯单体的选择性(VCM)99.9%,此前20 h在流180摄氏度的条件下,每小时乙炔气体空间速度(GHSV) 852 h(1)和盐酸/乙炔饲料体积比为1.15。氧化铈的加入可以使活跃的非盟物种均匀分散,提高反应物的吸附特性催化剂,还抑制减少活跃的黄金物种和抑制焦炭沉积在催化剂表面的反应。描述使用透射电子显微镜、拉曼光谱学、n -吸附/解吸分析,热重分析,程序升温还原、程序升温解吸、粉末x射线衍射、原子吸收光谱和x射线光电子能谱。

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