Comparative study of fluidized-bed and fixed-bed reactor for syngas methanation over Ni-W/TiO2-SiO2 catalyst

能源化学(英文) ›› 2013, Vol. 22 ›› Issue (5): 740-746.

Comparative study of fluidized-bed and fixed-bed reactor for syngas methanation over Ni-W/TiO₂-SiO₂ catalyst

Bo Liu^a,b, Shengfu Ji^a

a. State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China;
b. Beijing Research Institute of Chemical Industry, SINOPEC, Beijing 100013, China

收稿日期:2013-01-17 修回日期:2013-03-12 出版日期:2013-09-20 发布日期:2013-09-30
通讯作者: Shengfu Ji

Comparative study of fluidized-bed and fixed-bed reactor for syngas methanation over Ni-W/TiO₂-SiO₂ catalyst

Bo Liu^a,b, Shengfu Ji^a

a. State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China;
b. Beijing Research Institute of Chemical Industry, SINOPEC, Beijing 100013, China

Received:2013-01-17 Revised:2013-03-12 Online:2013-09-20 Published:2013-09-30

摘要/Abstract

摘要： In this work, syngas methanation over Ni-W/TiO₂-SiO₂ catalyst was studied in a fluidized-bed reactor (FBR) and its performance was compared with a fixed-bed reactor (FIXBR). The effects of main operating variables including feedstock gases space velocity, coke content, bed temperature and sulfur-tolerant stability of 100 h life were investigated. The structure of the catalysts was characterized by XRD, N₂ adsorption-desorption and TEM. It is found that under same space velocity from 5000 h^-1 to 25000 h^-1 FBR gave a higher CH₄ yield, lower coke content, and lower bed temperature than those obtained in FIXBR. Ni-W/TiO₂-SiO₂ catalyst possessed excellent sulfur-tolerant stability on the feedstock gases less than 500 ppm H₂S in FBR. The carbon deposits formed on the spent catalyst were in the form of carbon fibers in FBR, while in the form of dense accumulation distribution appearance in FIXBR.

关键词: syngas, methanation, Ni-W/TiO₂-SiO₂ catalyst, fluidized bed, fixed bed

Abstract: In this work, syngas methanation over Ni-W/TiO₂-SiO₂ catalyst was studied in a fluidized-bed reactor (FBR) and its performance was compared with a fixed-bed reactor (FIXBR). The effects of main operating variables including feedstock gases space velocity, coke content, bed temperature and sulfur-tolerant stability of 100 h life were investigated. The structure of the catalysts was characterized by XRD, N₂ adsorption-desorption and TEM. It is found that under same space velocity from 5000 h^-1 to 25000 h^-1 FBR gave a higher CH₄ yield, lower coke content, and lower bed temperature than those obtained in FIXBR. Ni-W/TiO₂-SiO₂ catalyst possessed excellent sulfur-tolerant stability on the feedstock gases less than 500 ppm H₂S in FBR. The carbon deposits formed on the spent catalyst were in the form of carbon fibers in FBR, while in the form of dense accumulation distribution appearance in FIXBR.

Key words: syngas, methanation, Ni-W/TiO₂-SiO₂ catalyst, fluidized bed, fixed bed

Bo Liu, Shengfu Ji. Comparative study of fluidized-bed and fixed-bed reactor for syngas methanation over Ni-W/TiO₂-SiO₂ catalyst[J]. 能源化学(英文), 2013, 22(5): 740-746.

Bo Liu, Shengfu Ji. Comparative study of fluidized-bed and fixed-bed reactor for syngas methanation over Ni-W/TiO₂-SiO₂ catalyst[J]. Journal of Energy Chemistry, 2013, 22(5): 740-746.

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Comparative study of fluidized-bed and fixed-bed reactor for syngas methanation over Ni-W/TiO₂-SiO₂ catalyst

Comparative study of fluidized-bed and fixed-bed reactor for syngas methanation over Ni-W/TiO₂-SiO₂ catalyst

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