Effect of Cu+/Cu2+ Ratio on the Catalytic Behavior of Anhydrous Nieuwland Catalyst during Dimerization of Acetylene
Effect of Cu+/Cu2+ Ratio on the Catalytic Behavior of Anhydrous Nieuwland Catalyst during Dimerization of Acetylene
复制标题
Cu/Cu2比对无水Nieuwland催化剂乙炔二聚催化行为的影响
DOI：
10.3390/catal6080120
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发表时间：
2016-08-01
期刊：
影响因子：
3.9
通讯作者：
Dai, Bin
中科院分区：
文献类型：
--
作者：
Liu, Haiyue;Xie, Jianwei;Dai, Bin
用X射线光电子能谱(XPS)测定了无水Nieuwland催化剂和添加CuCl2的无水Nieuwland催化剂溶液中Cu2+和Cu2+的相对含量。结果表明，在乙炔二聚生成单乙烯基乙炔的过程中，Cu2+会转化为Cu2+，导致催化剂失活。此外，Cu2+的加入抑制了Cu2+氧化成Cu2+的作用，提高了催化剂的性能和寿命。Cu2+与Cu2+的最佳摩尔比约为2：1，在此摩尔比下，乙炔转化率可达40%。
The relative contents of Cu+ and Cu2+ in solutions of anhydrous Nieuwland catalyst and CuCl2-added anhydrous Nieuwland catalyst were detected by X-ray photoelectron spectroscopy (XPS). Results indicated that Cu+ could be transformed into Cu2+ during the process of acetylene dimerization into monovinylacetylene, leading to deactivation of the catalyst. Moreover, the addition of Cu2+ inhibited the oxidation of Cu+ into Cu2+ and enhanced the performance and lifetime of the catalyst. The optimum molar ratio of Cu+ to Cu2+ was approximately 2:1; at this ratio, up to 40% acetylene conversion may be achieved.