Effect of sequence of P and Co addition over silica for Fischer-Tropsch synthesis

Muthu Kumaran Gnanamani; Gary Jacobs; Uschi M. Graham; Venkat Ramana Rao Pendyala; Michela Martinelli; Aimee MacLennan; Yongfeng Hu; Burtron H. Davis

doi:10.1016/j.apcata.2017.03.033

Effect of sequence of P and Co addition over silica for Fischer-Tropsch synthesis

Muthu Kumaran Gnanamani, Gary Jacobs, Uschi M. Graham, Venkat Ramana Rao Pendyala, Michela Martinelli, Aimee MacLennan, Yongfeng Hu, Burtron H. Davis

Center for Applied Energy Research (CAER)

Research output: Contribution to journal › Article › peer-review

20 Scopus citations

Abstract

The effect of the sequence of phosphorous and cobalt addition to silica on the activity and product selectivity for Fischer-Tropsch synthesis was investigated using a slurry phase continuously stirred-tank reactor. Advantages of P-modified silica supported cobalt included higher activity and C₅+ selectivity in comparison with both the undoped and P-doped cobalt silica catalysts. Results of hydrogen chemisorption revealed that cobalt dispersion was higher for all three P-containing cobalt catalysts compared to the undoped cobalt catalyst. H₂-TPR profiles indicate P increases the fraction of high-temperature reducible cobalt oxide species and these surface species were dominant in the case of co-impregnated and P-doped cobalt silica catalysts. P-modified silica had enhanced FT activity likely by altering the surface interactions of cobalt with the hydroxyl groups on silica.

Original language	English
Pages (from-to)	190-198
Number of pages	9
Journal	Applied Catalysis A: General
Volume	538
DOIs	https://doi.org/10.1016/j.apcata.2017.03.033
State	Published - 2017

Bibliographical note

Funding Information:
This work carried out at the CAER was supported by the Commonwealth of Kentucky. Research described in this paper was performed in part at the Canadian Light Source, which is funded by the Canada Foundation for Innovation, the Natural Sciences and Engineering Research Council of Canada, the National Research Council Canada, the Canadian Institutes of Health Research, the Government of Saskatchewan, Western Economic Diversification Canada, and the University of Saskatchewan.

Publisher Copyright:
© 2017 Elsevier B.V.

Keywords

Cobalt
EXAFS/XANES
Fischer-Tropsch
H-TPR
Phosphorous

ASJC Scopus subject areas

Catalysis
Process Chemistry and Technology

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10.1016/j.apcata.2017.03.033

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title = "Effect of sequence of P and Co addition over silica for Fischer-Tropsch synthesis",

abstract = "The effect of the sequence of phosphorous and cobalt addition to silica on the activity and product selectivity for Fischer-Tropsch synthesis was investigated using a slurry phase continuously stirred-tank reactor. Advantages of P-modified silica supported cobalt included higher activity and C5+ selectivity in comparison with both the undoped and P-doped cobalt silica catalysts. Results of hydrogen chemisorption revealed that cobalt dispersion was higher for all three P-containing cobalt catalysts compared to the undoped cobalt catalyst. H2-TPR profiles indicate P increases the fraction of high-temperature reducible cobalt oxide species and these surface species were dominant in the case of co-impregnated and P-doped cobalt silica catalysts. P-modified silica had enhanced FT activity likely by altering the surface interactions of cobalt with the hydroxyl groups on silica.",

keywords = "Cobalt, EXAFS/XANES, Fischer-Tropsch, H-TPR, Phosphorous",

author = "Gnanamani, {Muthu Kumaran} and Gary Jacobs and Graham, {Uschi M.} and Pendyala, {Venkat Ramana Rao} and Michela Martinelli and Aimee MacLennan and Yongfeng Hu and Davis, {Burtron H.}",

note = "Funding Information: This work carried out at the CAER was supported by the Commonwealth of Kentucky. Research described in this paper was performed in part at the Canadian Light Source, which is funded by the Canada Foundation for Innovation, the Natural Sciences and Engineering Research Council of Canada, the National Research Council Canada, the Canadian Institutes of Health Research, the Government of Saskatchewan, Western Economic Diversification Canada, and the University of Saskatchewan. Publisher Copyright: {\textcopyright} 2017 Elsevier B.V.",

year = "2017",

doi = "10.1016/j.apcata.2017.03.033",

language = "English",

volume = "538",

pages = "190--198",

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AU - Gnanamani, Muthu Kumaran

AU - Jacobs, Gary

AU - Graham, Uschi M.

AU - Pendyala, Venkat Ramana Rao

AU - Martinelli, Michela

AU - MacLennan, Aimee

AU - Hu, Yongfeng

AU - Davis, Burtron H.

N1 - Funding Information: This work carried out at the CAER was supported by the Commonwealth of Kentucky. Research described in this paper was performed in part at the Canadian Light Source, which is funded by the Canada Foundation for Innovation, the Natural Sciences and Engineering Research Council of Canada, the National Research Council Canada, the Canadian Institutes of Health Research, the Government of Saskatchewan, Western Economic Diversification Canada, and the University of Saskatchewan. Publisher Copyright: © 2017 Elsevier B.V.

PY - 2017

Y1 - 2017

N2 - The effect of the sequence of phosphorous and cobalt addition to silica on the activity and product selectivity for Fischer-Tropsch synthesis was investigated using a slurry phase continuously stirred-tank reactor. Advantages of P-modified silica supported cobalt included higher activity and C5+ selectivity in comparison with both the undoped and P-doped cobalt silica catalysts. Results of hydrogen chemisorption revealed that cobalt dispersion was higher for all three P-containing cobalt catalysts compared to the undoped cobalt catalyst. H2-TPR profiles indicate P increases the fraction of high-temperature reducible cobalt oxide species and these surface species were dominant in the case of co-impregnated and P-doped cobalt silica catalysts. P-modified silica had enhanced FT activity likely by altering the surface interactions of cobalt with the hydroxyl groups on silica.

AB - The effect of the sequence of phosphorous and cobalt addition to silica on the activity and product selectivity for Fischer-Tropsch synthesis was investigated using a slurry phase continuously stirred-tank reactor. Advantages of P-modified silica supported cobalt included higher activity and C5+ selectivity in comparison with both the undoped and P-doped cobalt silica catalysts. Results of hydrogen chemisorption revealed that cobalt dispersion was higher for all three P-containing cobalt catalysts compared to the undoped cobalt catalyst. H2-TPR profiles indicate P increases the fraction of high-temperature reducible cobalt oxide species and these surface species were dominant in the case of co-impregnated and P-doped cobalt silica catalysts. P-modified silica had enhanced FT activity likely by altering the surface interactions of cobalt with the hydroxyl groups on silica.

KW - Cobalt

KW - EXAFS/XANES

KW - Fischer-Tropsch

KW - H-TPR

KW - Phosphorous

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SN - 0926-860X

VL - 538

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JO - Applied Catalysis A: General

JF - Applied Catalysis A: General

ER -

Effect of sequence of P and Co addition over silica for Fischer-Tropsch synthesis

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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