Studies on KIT-6 supported cobalt catalyst for fischer-tropsch synthesis

Muthu Kumaran Gnanamani; Gary Jacobs; Uschi M. Graham; Wenping Ma; Venkat Ramana Rao Pendyala; Mauro Ribeiro; Burtron H. Davis

doi:10.1007/s10562-009-0213-7

Studies on KIT-6 supported cobalt catalyst for fischer-tropsch synthesis

Muthu Kumaran Gnanamani
, Gary Jacobs
, Uschi M. Graham
, Wenping Ma
, Venkat Ramana Rao Pendyala
, Mauro Ribeiro
, Burtron H. Davis

Center for Applied Energy Research (CAER)

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

28 Scopus citations

Abstract

KIT-6 molecular sieve was used as a support to prepare cobalt catalyst for Fischer-Tropsch synthesis (FTS) using an incipient wetness impregnation method to produce cobalt loadings of 15 and 25 wt%. The catalysts were characterized by BET surface area, X-ray diffraction, scanning transmission election microscopy (STEM), extended X-ray absorption fine spectroscopy and X-ray absorption near edge spectroscopy. The catalytic properties for FTS were evaluated using a 1L CSTR reactor. XRD, pore size distribution, and STEM analysis indicate that the KIT-6 mesostructure remains stable during and after cobalt impregnation and tends to form smaller cobalt particles, probably located inside the mesopores. The mesoporous KIT-6 exhibited a slightly higher cobalt dispersion compared to amorphous SiO₂ supported catalyst. With the higher Co loading (25 wt%) on KIT-6, partial structural collapse was observed after the FTS reaction. Compared to an amorphous SiO₂ supported cobalt catalyst, KIT-6 supported cobalt catalyst displayed higher methane selectivity at a similar Co loading, likely due to diffusion effects.

Original language	English
Pages (from-to)	37-44
Number of pages	8
Journal	Catalysis Letters
Volume	134
Issue number	1-2
DOIs	https://doi.org/10.1007/s10562-009-0213-7
State	Published - 2010

Bibliographical note

Funding Information:
Acknowledgments This research was carried out, in part, at the National Synchrotron Light Source, Brookhaven National Laboratory, which is supported by the U.S. DOE, Divisions of Materials Science and Chemical Sciences, as well as at the Nanotechnology Center at the University of Louisville. Special thanks to Drs. Syed Khalid and Nebojsa Marinkovic (Beamline X18b, NSLS, Brookhaven) for help with XAFS studies and Joel Young (University of Oklahoma, Dept. of Physics) for XAFS cell construction.

Funding

Acknowledgments This research was carried out, in part, at the National Synchrotron Light Source, Brookhaven National Laboratory, which is supported by the U.S. DOE, Divisions of Materials Science and Chemical Sciences, as well as at the Nanotechnology Center at the University of Louisville. Special thanks to Drs. Syed Khalid and Nebojsa Marinkovic (Beamline X18b, NSLS, Brookhaven) for help with XAFS studies and Joel Young (University of Oklahoma, Dept. of Physics) for XAFS cell construction.

Funders
Divisions of Materials Science and Chemical Sciences
National Synchrotron Light Source
Michigan State University-U.S. Department of Energy (MSU-DOE) Plant Research Laboratory
Brookhaven National Laboratory (BNL)
University of Louisville

Keywords

Catalyst
Cobalt
Fischer-Tropsch synthesis
KIT-6
Mesoporous silica

ASJC Scopus subject areas

Catalysis
General Chemistry

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10.1007/s10562-009-0213-7

Cite this

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title = "Studies on KIT-6 supported cobalt catalyst for fischer-tropsch synthesis",

abstract = "KIT-6 molecular sieve was used as a support to prepare cobalt catalyst for Fischer-Tropsch synthesis (FTS) using an incipient wetness impregnation method to produce cobalt loadings of 15 and 25 wt\%. The catalysts were characterized by BET surface area, X-ray diffraction, scanning transmission election microscopy (STEM), extended X-ray absorption fine spectroscopy and X-ray absorption near edge spectroscopy. The catalytic properties for FTS were evaluated using a 1L CSTR reactor. XRD, pore size distribution, and STEM analysis indicate that the KIT-6 mesostructure remains stable during and after cobalt impregnation and tends to form smaller cobalt particles, probably located inside the mesopores. The mesoporous KIT-6 exhibited a slightly higher cobalt dispersion compared to amorphous SiO2 supported catalyst. With the higher Co loading (25 wt\%) on KIT-6, partial structural collapse was observed after the FTS reaction. Compared to an amorphous SiO2 supported cobalt catalyst, KIT-6 supported cobalt catalyst displayed higher methane selectivity at a similar Co loading, likely due to diffusion effects.",

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author = "Gnanamani, \{Muthu Kumaran\} and Gary Jacobs and Graham, \{Uschi M.\} and Wenping Ma and Pendyala, \{Venkat Ramana Rao\} and Mauro Ribeiro and Davis, \{Burtron H.\}",

note = "Funding Information: Acknowledgments This research was carried out, in part, at the National Synchrotron Light Source, Brookhaven National Laboratory, which is supported by the U.S. DOE, Divisions of Materials Science and Chemical Sciences, as well as at the Nanotechnology Center at the University of Louisville. Special thanks to Drs. Syed Khalid and Nebojsa Marinkovic (Beamline X18b, NSLS, Brookhaven) for help with XAFS studies and Joel Young (University of Oklahoma, Dept. of Physics) for XAFS cell construction.",

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language = "English",

volume = "134",

pages = "37--44",

number = "1-2",

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AU - Pendyala, Venkat Ramana Rao

AU - Ribeiro, Mauro

AU - Davis, Burtron H.

N1 - Funding Information: Acknowledgments This research was carried out, in part, at the National Synchrotron Light Source, Brookhaven National Laboratory, which is supported by the U.S. DOE, Divisions of Materials Science and Chemical Sciences, as well as at the Nanotechnology Center at the University of Louisville. Special thanks to Drs. Syed Khalid and Nebojsa Marinkovic (Beamline X18b, NSLS, Brookhaven) for help with XAFS studies and Joel Young (University of Oklahoma, Dept. of Physics) for XAFS cell construction.

PY - 2010

Y1 - 2010

N2 - KIT-6 molecular sieve was used as a support to prepare cobalt catalyst for Fischer-Tropsch synthesis (FTS) using an incipient wetness impregnation method to produce cobalt loadings of 15 and 25 wt%. The catalysts were characterized by BET surface area, X-ray diffraction, scanning transmission election microscopy (STEM), extended X-ray absorption fine spectroscopy and X-ray absorption near edge spectroscopy. The catalytic properties for FTS were evaluated using a 1L CSTR reactor. XRD, pore size distribution, and STEM analysis indicate that the KIT-6 mesostructure remains stable during and after cobalt impregnation and tends to form smaller cobalt particles, probably located inside the mesopores. The mesoporous KIT-6 exhibited a slightly higher cobalt dispersion compared to amorphous SiO2 supported catalyst. With the higher Co loading (25 wt%) on KIT-6, partial structural collapse was observed after the FTS reaction. Compared to an amorphous SiO2 supported cobalt catalyst, KIT-6 supported cobalt catalyst displayed higher methane selectivity at a similar Co loading, likely due to diffusion effects.

AB - KIT-6 molecular sieve was used as a support to prepare cobalt catalyst for Fischer-Tropsch synthesis (FTS) using an incipient wetness impregnation method to produce cobalt loadings of 15 and 25 wt%. The catalysts were characterized by BET surface area, X-ray diffraction, scanning transmission election microscopy (STEM), extended X-ray absorption fine spectroscopy and X-ray absorption near edge spectroscopy. The catalytic properties for FTS were evaluated using a 1L CSTR reactor. XRD, pore size distribution, and STEM analysis indicate that the KIT-6 mesostructure remains stable during and after cobalt impregnation and tends to form smaller cobalt particles, probably located inside the mesopores. The mesoporous KIT-6 exhibited a slightly higher cobalt dispersion compared to amorphous SiO2 supported catalyst. With the higher Co loading (25 wt%) on KIT-6, partial structural collapse was observed after the FTS reaction. Compared to an amorphous SiO2 supported cobalt catalyst, KIT-6 supported cobalt catalyst displayed higher methane selectivity at a similar Co loading, likely due to diffusion effects.

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KW - Fischer-Tropsch synthesis

KW - KIT-6

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Studies on KIT-6 supported cobalt catalyst for fischer-tropsch synthesis

Abstract

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Funding

Keywords

ASJC Scopus subject areas

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