Supercritical water gasification of phenol over Ni-Ru bimetallic catalysts

被引：40

作者：

Zhang, Jiandong ^{[1
]}

Dasgupta, Anish ^{[2
]}

Chen, Zhifeng ^{[2
]}

Xu, Donghai ^{[1
]}

Savage, Phillip E. ^{[2
]}

Guo, Yang ^{[1
,2
]}

机构：

[1] Xi An Jiao Tong Univ, Sch Energy & Power Engn, Minist Educ, Key Lab Thermofluid Sci & Engn, Xian 710049, Shaanxi, Peoples R China

[2] Penn State Univ, Dept Chem Engn, University Pk, PA 16802 USA

来源：

WATER RESEARCH | 2019年 / 152卷

基金：

中国国家自然科学基金;

关键词：

Phenol; Supercritical water gasification; Bimetallic catalyst; Nickel; Ruthenium; PRESSURE AQUEOUS ENVIRONMENTS; HYDROTHERMAL GASIFICATION; HYDROGEN-PRODUCTION; RU-NI/TIO2; CATALYSTS; ALLOY NANOPARTICLES; BIOMASS; GLUCOSE; GAS; DEHYDROGENATION; CONVERSION;

D O I：

10.1016/j.watres.2018.12.030

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Incorporating Ru in a Ni catalyst for gasification of phenol in supercritical water at 450 degrees C and 30 min promoted formation of cyclohexanol via hydrogenation, which is a key step toward gasification. Both Ni and Ni-Ru catalysts were effective to reduce the formation of cyclohexanone and oligomerization products, compared with the case with no catalyst. H-2 and CH4 yields increased as the Ru/Ni ratio increased, as did the carbon and hydrogen yields in the gas phase products. The Ni80Ru20/Al2O3 catalyst provided good gasification performance and it exhibits Ru (101), Ru (100) and Ni (111) facets and evidence of overlaid bimetallic particles. DFT calculations show that the presence of Ru (either as pure Ru or as a Ni-Ru alloy) reduces the energy barrier for phenol hydrogenation by close to 0.2 eV relative to pure Ni, and that the energy barrier is not as largely affected by the amount of Ru present, provided it is non-zero. (C) 2019 Elsevier Ltd. All rights reserved.

引用

页码：12 / 20

页数：9

共 62 条

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