The effect of modifier identity on the performance of Ni-based catalyst supported on γ-Al2O3 in dry reforming of methane

被引:68
作者
Al-Fatesh, Ahmed Sadeq [1 ]
Kumar, Rawesh [2 ]
Kasim, Samsudeen Olajide [1 ]
Ibrahim, Ahmed Aidid [1 ]
Fakeeha, Anis Hamza [1 ]
Abasaeed, Ahmed Elhag [1 ]
Alrasheedu, Rasheed [3 ]
Bagabas, Abdulaziz [3 ]
Chaudhary, Mayankkumar Lakshmanbhai [2 ]
Frusteri, Francesco [4 ]
Chowdhury, B. [5 ]
机构
[1] King Saud Univ, Chem Engn Dept, Coll Engn, POB 800, Riyadh 11421, Saudi Arabia
[2] Sankalchand Patel Univ, Visnagar 384315, Gujarat, India
[3] King Abdulazis City Sci & Technol KACST, Mat Sci Res Inst MSRU, Natl Petrochem Technol Ctr NPTC, POB 6086, Riyadh 11442, Saudi Arabia
[4] CNR ITAE, Ist Tecnol Avanzate Energia Nicola Giordano, Via S Lucia Sopra Contesse 5, I-98126 Messina, Italy
[5] Indian Sch Mines, Indian Inst Technol, Dhanbad 826004, Bihar, India
关键词
Dry reforming of methane; Metal oxide modifiers; Supported NiO; Syngas; gamma-Al2O3; CARBON-DIOXIDE; HYDROGEN-PRODUCTION; CERIA-ZIRCONIA; SYNTHESIS GAS; CO2; XPS; CH4; DISPERSION; REDUCTION; SIO2-ZRO2;
D O I
10.1016/j.cattod.2019.09.003
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
Dry reforming of methane (DRM) for the production of synthesis gas (syngas: H-2 + CO) was performed over a series of nickel-based catalysts supported on.-alumina promoted by B, Si, Ti, Zr, Mo and W. All catalysts were prepared by the wet incipient impregnation method and were characterized by X-ray diffraction (XRD), N-2 physisorption, H-2-TPR, CO2-TPD, XPS, SEM and TGA. Among different catalysts investigated, 5Ni3SiAl and 5Ni3WAl catalytic systems were found highly active with excellent coke resistance in DRM, as both catalyst systems showed >64% CH4 conversion, >70% CO2 conversion, and >0.90 mol H-2/CO ratio over seven hours of reaction. The strong interaction between NiO and gamma-alumina support in the presence of Si or W oxide modifier (in 5Ni3SiAl or 5Ni3WAl) was indicated as the main factor positively affecting both Ni dispersion and stability.
引用
收藏
页码:236 / 242
页数:7
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