文献类型：期刊文献

英文题名：Platinum-Copper Bimetallic-Modified Nanoprism Mordenite for Carbonylation of Dimethyl Ether

作者：Sheng, Haibing[1];Ma, Hongfang[1];Qian, Weixin[1];Fei, Nina[1];Zhang, Haitao[1];Ying, Weiyong[1]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, Minist Educ, Engn Res Ctr Large Scale Reactor Engn & Technol, Shanghai 200237, Peoples R China

年份：2019

卷号：33

期号：10

起止页码：10159

外文期刊名：ENERGY & FUELS

收录：;EI(收录号：20194107511799);WOS:【SCI-EXPANDED(收录号:WOS:000492113000072)】；

基金：We acknowledge financial support from the Fundamental Research Funds for the Central Universities (No. 222201917013).

语种：英文

外文关键词：Carbonylation - Copper compounds - Nanocatalysts - Nanostructures - Catalyst activity - Methanol - Temperature programmed desorption - Zeolites - Catalyst selectivity - Inductively coupled plasma - High resolution transmission electron microscopy - Fuels - Ion exchange - Atomic emission spectroscopy - X ray photoelectron spectroscopy - Particle size - Scanning electron microscopy

摘要：Platinum-copper bimetallic-modified mordenite catalysts for the dimethyl ether (DME) carbonylation to methyl acetate (MA) were carried out using a laboratory-made nanoprism mordenite, which was synthesized by hydrothermal method and modified by ion exchange with Cu(NO3)(2) and wet impregnation with H2PtCl6. The catalyst was characterized by X-ray diffraction, inductively coupled plasma atomic emission spectroscopy, N2O titration, NH3 temperature-programmed desorption, H-2 temperature-programmed reduction, pyridine-infrared, Fourier transform infrared, Brunauer-Emmett-Teller, high-resolution transmission electron microscopy, energy-dispersive spectrometry mapping, scanning electron microscopy, X-ray photoelectron spectroscopy, and temperature-programmed oxidation. Bimetallic platinum-copper catalysts exhibited high catalytic activity for carbonylation of DME, which was attributed to the large quantity of the Bronsted acid sites in the eight-membered ring (8-MR). Moreover, the bimetallic catalyst with small copper particle size and bimetallic synergism promoted conversion of DME and MA selectivity. Over the 1Pt/Cu-mor catalyst (1 wt % Pt and 2 wt % Cu), DME conversion and MA selectivity reached 86.0% and 96.0%, respectively. What's more, the addition of Pt reduced the acidity of the 12-membered ring (12-MR) in the Cu-mor catalyst, resulting in a suppression of hard coke formation.