文献类型：期刊文献

英文题名：High performance of CuY zeolite for catalyzing acetylene carbonylation and the effect of copper valence states on catalyst

作者：Xie, Hao[1];Yi, Dezhi[1];Shi, Li[1];Meng, Xuan[1]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2017

卷号：313

起止页码：663

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20170203228915);WOS:【SCI-EXPANDED(收录号:WOS:000394723200067)】；

基金：We are so grateful and want to extend our sincere appreciations for the financial support from Shanghai Sailing Program (15YF1403000) and the Special Fund of Fundamental Research and Exploration (22A201514014).

语种：英文

外文关键词：Valence state; CuY; Carbonylation; Acid property; Location

摘要：Catalytic reactions of acetylene have become a subject of renewed interest. However, recent literatures about the synthesis of acrylic acid by acetylene carbonylation were rare to be found. In our research, the yield of acrylic acid is greatly improved to similar to 86% (242.85 g Acrylic acidig Cat..h) by using heterogeneous catalyst Cu(I)Y, against similar to 70% from other reports using complex homogeneous catalyst. Y modified with different valence states copper Were prepared by heating the precursor at various atmospheres and characterized by XRD, BET, XPS and FT-IR. More than one type of copper (Cu2+, CuO, Cu2O, Cu+ or Cu-0) was found on one sample. Moreover, the distribution and the forming process of these types of copper were determined. According to FT-IR using pyridine or CO as probe, Cu+ at site II' not only enhanced the acid strength obviously, but also promoted the formation of the most stable monocarbonyls. Furthermore, the strong acid site and the stable monocarbonyls are beneficial for the acetylene carbonylation. (C) 2016 Elsevier B.V. All rights reserved.