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Attrition-resistant Ni-Mg/SiO2-Al2O3 catalysts with different silica sources for fluidized bed syngas methanation
Cui, Dianmiao1,2; Liu, Jiao1; Yu, Jian1; Su, Fabing1; Xu, Guangwen1

Attrition-resistant Ni-Mg/SiO2-Al2O3 catalysts for fluidized bed syngas methanation were prepared by combining co-precipitation and spray granulation using different silica sources including acidic silica sol (SS), sodium silicate (NS) and tetraethyl orthosilicate (TEOS). Air-jet attrition tests showed that the attrition strength of the resulting catalysts followed an order of C-10TEOS > C-33SS > C-1ONS > C-10SS, where C-10TEOS, as an example, refers to the catalyst with 10 wt.% silica using TEOS as its silica source. Characterizations show that the porosity and skeletal structure have strong correlation with catalyst attrition strength. Simultaneous hydrolysis of TEOS and co-precipitation caused C-10TEOS to have dense and continuous skeletal structure to have the high strength of its Ni-Mg/SiO2-Al2O3 precursor particles and thus the improved attrition resistance of sprayed catalyst. Silica sol filled in the voids among precursor particles resulted in a compact framework in C-33SS but its Ni-Mg/Al2O3 precursor had weak attrition resistance. Atmospheric syngas methanation over these catalysts at an SV of 600 NL g(-1) h(-1) in a fixed bed reactor clarified an activity order of C-10TEOS > C-1ONS approximate to C-33SS. The TEOS also enabled highly dispersed metallic Ni and many surface active sites to facilitate the methanation activity and stability of this catalyst. (C) 2017 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

KeywordMethanation Fluidized Bed Silica Support Tetraethyl Orthosilicate Spray Granulation Attrition Resistance
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
Indexed BySCI
WOS KeywordFischer-tropsch Synthesis ; Synthetic Natural-gas ; Ni-mg/al2o3 Catalyst ; Particle Attrition ; Precipitated Sio2 ; Iron Catalysts ; Performance ; Reactors ; Alumina ; Binder
WOS Research AreaChemistry ; Electrochemistry ; Energy & Fuels
WOS SubjectChemistry, Physical ; Electrochemistry ; Energy & Fuels
Funding OrganizationNational High Technology Research and Development Program of China(2015AA050502)
WOS IDWOS:000403852600026
Citation statistics
Document Type期刊论文
Affiliation1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Cui, Dianmiao,Liu, Jiao,Yu, Jian,et al. Attrition-resistant Ni-Mg/SiO2-Al2O3 catalysts with different silica sources for fluidized bed syngas methanation[J]. INTERNATIONAL JOURNAL OF HYDROGEN ENERGY,2017,42(8):4987-4997.
APA Cui, Dianmiao,Liu, Jiao,Yu, Jian,Su, Fabing,&Xu, Guangwen.(2017).Attrition-resistant Ni-Mg/SiO2-Al2O3 catalysts with different silica sources for fluidized bed syngas methanation.INTERNATIONAL JOURNAL OF HYDROGEN ENERGY,42(8),4987-4997.
MLA Cui, Dianmiao,et al."Attrition-resistant Ni-Mg/SiO2-Al2O3 catalysts with different silica sources for fluidized bed syngas methanation".INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 42.8(2017):4987-4997.
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