Comparison of Kinetics and Activity of Ni‐Based Catalysts for Benzyl Phenyl Ether Catalytic Hydrogenolysis. Issue 3 (6th March 2019)

• Record Type: Journal Article
• Authors: Zhu, Chen; Cao, Jing-Pei; Xie, Tao; Zhao, Xiao-Yan; Cui, Xin; Guo, Zhen-Xing; Shen, Wen-Zhong; Bai, Jin; Wei, Xian-Yong
• Is Part Of: Energy technology. Volume 7:Issue 3(2019:Mar.)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2019-03-06
• Subjects: apparent activation energies -- benzyl phenyl ether -- lignite -- Ni‐based catalysts -- turnover frequencies; Energy development -- Periodicals; Power resources -- Periodicals; 333.79
• DOI: 10.1002/ente.201800694
• Languages: English
• ISSNs: 2194-4288

Abstract

Abstract : The influence of the type of support [activated carbon (AC), HZSM‐5, and γ‐Al2 O3 ] on the performance of Ni‐based catalysts for the catalytic hydrogenolysis (CH) of benzyl phenyl ether (BPE) is investigated. The properties of an Ni‐based catalyst are investigated using diverse characterization techniques. An Ni/AC catalyst exhibits the highest dispersion of Ni atoms by CO pulse. The kinetic studies show that the apparent activation energies ( E a ) for CH of BPE increase in the order E a (Ni/AC) < E a (Ni/γ‐Al2 O3 ) < E a (Ni/HZSM‐5), and the initial turnover frequencies follow the order of Ni/AC (64 mol molNisurf −1 h −1 ) > Ni/γ‐Al2 O3 (58 mol molNisurf −1 h −1 ) > Ni/HZSM‐5 (45 mol molNisurf −1 h −1 ). All these results prove that the CH activity of BPE is significantly affected by the type of support, and Ni/AC is the highest activity catalyst in CH of the C—O bond of BPE. Toluene and phenol are major products in CH of BPE at a relatively low hydrogen pressure and high temperature. Based on catalytic experiments, a reaction mechanism is proposed, which provides the theoretical basis for converting lignite into high‐value organic molecules. Abstract : The turnover frequency (per mole of converted reactant on per mole of surface metal atom per hour) and apparent activation energies ( E a ) of benzyl phenyl ether (BPE) conversion are calculated to evaluate the activity of Ni‐based catalysts. Ni/AC is the highest activity catalyst in the catalytic hydrogenolysis of the C—O bond of BPE. Based on catalytic experiments, a reaction mechanism of BPE is proposed.