Active ruthenium species in acetylene hydrochlorination
Active ruthenium species in acetylene hydrochlorination
复制标题
乙炔氢氯化反应中的活性钌物质
DOI：
10.1016/j.apcata.2014.09.037
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发表时间：
2014-11-01
影响因子：
5.5
通讯作者：
Li, Wei
中科院分区：
文献类型：
--
作者：
Pu, Yanfeng;Zhang, Jinli;Li, Wei
以球形活性炭为载体，经氧化或还原处理，制备了一系列铈基催化剂。采用BET、TG、TEM、TPR、拉曼和XPS等表征手段对所制备的催化剂进行了乙炔氢氯化反应的性能评价。氧化催化剂Ru/SAC-C300的催化性能最好，在170 ℃下48 h内乙炔转化率稳定在96.5%，GHSV（C2 H2）为180 h（-1）。提出了乙炔氢氯化钌基催化剂表面存在三个主要活性中心，氧化态（RuO 2）、还原态（金属Ru）和Ru/RuOy复合物。与还原处理后的活性组分金属Ru和Ru/RuOy相比，氧化处理后的活性组分RuO 2是提高Ru基催化剂催化性能的关键，为探索乙炔氢氯化反应高效无汞催化剂提供了一条有前景的途径。(C)2014爱思唯尔有限公司版权所有。
A series of ruthenium-based catalysts were prepared using spherical activated carbon as a support with the treatment of oxidation or reduction. The catalytic performances of the prepared catalysts were assessed in the hydrochlorination of acetylene based on their characterisation by BET, TG, TEM, TPR, Raman, and XPS. The best catalytic performance was achieved with the oxidised catalyst Ru/SAC-C300, which exhibited a stable acetylene conversion at 96.5% in 48 h at 170 degrees C and a GHSV (C2H2) of 180 h(-1). It is proposed that there exist three major active sites on the surface of Ru-based catalysts for acetylene hydrochlorination, i.e., the oxidised site (RuO2), the reduced state (metallic Ru) and the complexes of Ru/RuOy. Compared with the active ingredient of metallic Ru and Ru/RuOy through the reductive treatment, the active ingredient of RuO2 is key for improving the catalytic performance of Ru-based catalysts through the oxidative treatment, which provides a promising route to explore high efficient non-mercuric catalysts for acetylene hydrochlorination. (C) 2014 Elsevier B.V. All rights reserved.