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Keywords = anhydrous Nieuwland catalyst

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Article
Effect of Cu+/Cu2+ Ratio on the Catalytic Behavior of Anhydrous Nieuwland Catalyst during Dimerization of Acetylene
by Haiyue Liu, Jianwei Xie, Ping Liu and Bin Dai
Catalysts 2016, 6(8), 120; https://doi.org/10.3390/catal6080120 - 4 Aug 2016
Cited by 55 | Viewed by 10800
Abstract
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 [...] Read more.
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. Full article
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