Role of Ca, Cr, Ga and Gd promotor over lanthana-zirconia-supported Ni catalyst towards H2-rich syngas production through dry reforming of methane

被引：32

作者：

Al-Fatesh, Ahmed S. ^{[1
]}

Khatri, Jyoti ^{[2
]}

Kumar, Rawesh ^{[3
]}

Srivastava, Vijay Kumar ^{[3
]}

Osman, Ahmed, I ^{[4
]}

AlGarni, Tahani S. ^{[5
]}

Ibrahim, Ahmed A. ^{[1
]}

Abasaeed, Ahmed E. ^{[1
]}

Fakeeha, Anis H. ^{[1
]}

Rooney, David W. ^{[4
]}

机构：

[1] King Saud Univ, Coll Engn, Chem Engn Dept, POB 800, Riyadh 11421, Saudi Arabia

[2] Sankalchand Patel Univ, Dept Chem, Visnagar, India

[3] Indus Univ, Dept Chem, Ahmadabad 382115, Gujarat, India

[4] Queens Univ Belfast, Sch Chem & Chem Engn, David Keir Bldg,Stranmillis Rd, Belfast BT9 5AG, Antrim, North Ireland

[5] King Saud Univ, Coll Sci, Dept Chem, Riyadh, Saudi Arabia

来源：

ENERGY SCIENCE & ENGINEERING | 2022年 / 10卷 / 03期

基金：

英国工程与自然科学研究理事会;

关键词：

Ca; Cr; Ga and Gd promoters; DRM; H-2; production; lanthana-zirconia support; Ni-based catalysis; oxygen replenishment; CARBON-DIOXIDE; NI-CAO-ZRO2; CATALYSTS; NI/AL2O3; CATALYST; OXIDE CATALYST; CO2; NICKEL; CH4; DEHYDROGENATION; PERFORMANCE; HYDROGEN;

D O I：

10.1002/ese3.1063

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

Hydrogen production through methane dry reforming holds the promise of lowering greenhouse gases, that is CO2 and CH4, concentrations. Herein, Ca-, Cr-, Ga- and Gd-promoted lanthana-zirconia-supported Ni catalysts are investigated and characterized by X-ray diffraction, Raman, infrared and UV-vis spectroscopy, CH4-temperature programmed surface reaction and cyclic reduction-desorption experiment. All promoted catalyst systems had high and constant hydrogen yield (>70%) due to pronounced reoxidation capacity of reduced 'NiO species strongly interacted with support' through oxygen replenishment by CO2. The presence of mixed oxide and regeneration of reduced catalyst up to optimum level through oxygen replenishment by CO2 in Gd, as well as Cr-promoted catalyst, outperformed (80% initially) than other promotors, Ca and Ga. In the long run (440 min to 33 h), Cr-promoted catalyst system performed better than Gd-promoted catalyst system as H-2 yield remained constant similar to 79% due to the smallest energy gap between valance and conduction band, Ni-Cr interaction species for wide range CH4 decomposition and chromate species for profound carbon deposit oxidation.

引用

页码：866 / 880

页数：15

共 66 条

[1] In situ auto-gasification of coke deposits over a novel Ni-Ce/W-Zr catalyst by sequential generation of oxygen vacancies for remarkably stable syngas production via CO2 -reforming of methane [J].