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Acetoxylation of acetylene to vinyl acetate monomer over bimetallic Zn-Ni/AC catalysts
Catalysis Communications ( IF 3.4 ) Pub Date : 2018-02-28 , DOI: 10.1016/j.catcom.2018.02.022
Peijie He , Xueyi Wu , Liuhua Huang , Mingyuan Zhu , Xugen Wang , Bin Dai

Zinc and bimetallic zinc-nickel catalysts for acetylene acetoxylation were prepared with Zn(OAc)2·2H2O and Ni(OAc)2·4H2O as precursors, and characterized by ICP-AES, BET, XPS, TEM, TPD-MS and TG. The catalytic performances of the obtained Zn-Ni/AC catalysts were tested in a fixed-bed reactor. The results indicated that the addition of nickel decreased the size of Zn(OAc)2 particles and inhibited carbon deposition on the catalyst surface; there was a synergistic effect between the two metal components, which modified the electronic properties of Zn(OAc)2 particles and modulated the catalytic adsorption of acetylene and acetic acid, thereby enhancing the activity and stability of the zinc catalysts.



中文翻译:

双金属Zn-Ni / AC催化剂上乙炔乙氧基化为乙酸乙烯酯单体

以Zn(OAc)2 ·2H 2 O和Ni(OAc)2 ·4H 2 O为前驱体制备了用于乙炔乙氧基化的锌和双金属锌镍催化剂,并通过ICP-AES,BET,XPS,TEM,TPD- MS和TG。在固定床反应器中测试了所获得的Zn-Ni / AC催化剂的催化性能。结果表明,镍的加入减少了Zn(OAc)2颗粒的尺寸并抑制了碳在催化剂表面的沉积。两种金属成分之间存在协同效应,从而改变了Zn(OAc)2的电子性能 并调节乙炔和乙酸的催化吸附,从而增强锌催化剂的活性和稳定性。

更新日期:2018-02-28
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