In Situ EXAFS Studies on Ni2P Hydrodesulfurization Catalysts in the Presence of High Pressure and High Temperature Oil

doi:10.1063/1.2644609

Title: In Situ EXAFS Studies on Ni2P Hydrodesulfurization Catalysts in the Presence of High Pressure and High Temperature Oil

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Abstract

A Ni2P/SiO2 catalyst that is highly active for hydrodesulfurization (HDS) reaction was studied by in situ extended x-ray absorption fine structure (EXAFS) under the real reaction conditions. The measurements were conducted at realistic conditions of high pressure (3 MPa) and high temperature (613 K) in the presence of model oil. We used a low-volume cell with cubic boron nitride windows. The obtained spectra revealed that the bulk Ni2P structure was stable at reaction conditions and that the active surface had Ni-S bonds under reaction conditions, which played an important role for HDS reactions.

Authors:

Kawai, Toshihide; Asakura, Kiyotaka ^[1]; Bando, Kyoko K. ^[2]; Lee, Yong-Kul; Oyama, S. Ted. ^[3]; Chun, Wang-Jae ^[1]

Catalysis Research Center, Hokkaido University, Sapporo 001-0021 (Japan)
National Institute of Advanced Industrial Science and Technology, 16-1, Onogawa, Tsukuba, 305-8569 (Japan)
Department of Chemical Engineering, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061 (United States)

Publication Date:: Fri Feb 02 00:00:00 EST 2007

OSTI Identifier:: 21054696

Resource Type:: Journal Article

Resource Relation:: Journal Name: AIP Conference Proceedings; Journal Volume: 882; Journal Issue: 1; Conference: XAFS13: 13. international conference on X-ray absorption fine structure, Stanford, CA (United States), 9-14 Jul 2006; Other Information: DOI: 10.1063/1.2644609; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; ABSORPTION SPECTRA; ABSORPTION SPECTROSCOPY; BORON NITRIDES; CATALYSIS; CATALYSTS; FINE STRUCTURE; INTERFACES; NICKEL PHOSPHIDES; OILS; PRESSURE DEPENDENCE; PRESSURE RANGE MEGA PA 10-100; REFINING; SILICON OXIDES; SURFACES; TEMPERATURE DEPENDENCE; X-RAY SPECTRA; X-RAY SPECTROSCOPY

Citation Formats


                    Kawai, Toshihide, Asakura, Kiyotaka, Bando, Kyoko K., Lee, Yong-Kul, Oyama, S. Ted., and Chun, Wang-Jae. In Situ EXAFS Studies on Ni2P Hydrodesulfurization Catalysts in the Presence of High Pressure and High Temperature Oil.  United States: N. p., 2007. 
        Web.  doi:10.1063/1.2644609.

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                    Kawai, Toshihide, Asakura, Kiyotaka, Bando, Kyoko K., Lee, Yong-Kul, Oyama, S. Ted., & Chun, Wang-Jae. In Situ EXAFS Studies on Ni2P Hydrodesulfurization Catalysts in the Presence of High Pressure and High Temperature Oil.  United States.  doi:10.1063/1.2644609.

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                    Kawai, Toshihide, Asakura, Kiyotaka, Bando, Kyoko K., Lee, Yong-Kul, Oyama, S. Ted., and Chun, Wang-Jae. Fri .  
        "In Situ EXAFS Studies on Ni2P Hydrodesulfurization Catalysts in the Presence of High Pressure and High Temperature Oil".  United States.  
        doi:10.1063/1.2644609.

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@article{osti_21054696,

  title        = {In Situ EXAFS Studies on Ni2P Hydrodesulfurization Catalysts in the Presence of High Pressure and High Temperature Oil},

  author       = {Kawai, Toshihide and Asakura, Kiyotaka and Bando, Kyoko K. and Lee, Yong-Kul and Oyama, S. Ted. and Chun, Wang-Jae},

  abstractNote = {A Ni2P/SiO2 catalyst that is highly active for hydrodesulfurization (HDS) reaction was studied by in situ extended x-ray absorption fine structure (EXAFS) under the real reaction conditions. The measurements were conducted at realistic conditions of high pressure (3 MPa) and high temperature (613 K) in the presence of model oil. We used a low-volume cell with cubic boron nitride windows. The obtained spectra revealed that the bulk Ni2P structure was stable at reaction conditions and that the active surface had Ni-S bonds under reaction conditions, which played an important role for HDS reactions.},

  doi          = {10.1063/1.2644609},

  journal      = {AIP Conference Proceedings},

  number       = 1,

  volume       = 882,

  place        = {United States},

  year         = {Fri Feb 02 00:00:00 EST 2007},

  month        = {Fri Feb 02 00:00:00 EST 2007}

}

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DOI: 10.1063/1.2644609

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PHYSICAL AND CHEMICAL PROPERTIES OF MOP, NI2P, AND MONIP HYDRODESULFURIZATION CATALYSTS: TIME-RESOLVED X-RAY DIFFRACTION, DENSITY FUNCTIONAL, AND HYDRODESULFURIZATION ACTIVITY STUDIES

RODRIGUEZ,J. ; KIM,J. ; HANSON,J. ; ... - Journal of Physical Chemistry B: Materials, Surfaces, Interfaces, amp Biophysical

No abstract prepared.
DOI: 10.1021/jp022639q
Cracking hydrogenation of Fushun shale oil at high pressure. II. Cracking of shale oil at high nitrogen and hydrogen pressure without a catalyst. III. Cracking hydrogenation of shale oil at high hydrogen pressure with several catalysts. IV. Effect of the amount of sulfur added to the catalyst and of reaction temperature and reaction time. V. Effect of initial pressure and of the purity of hydrogen

Mizoshita, T. ; Ueno, M. - Kogyo Kagaku Zasshi
Bifunctional Nature of a SiO2-Supported Ni2P Catalyst for Hydrotreating: EXAFS and FTIR Studies

Lee,K. ; Oyama, S. - J. Catal.

A Ni{sub 2}P catalyst supported on a high-surface area SiO{sub 2} (350 m{sup 2} g{sub -1}) was prepared by temperature-programmed reduction, and its structural and surface properties were studied. X-ray diffraction and extended X-ray absorption fine structure measurements were used to obtain structural parameters for the supported Ni{sub 2}P phase, and Fourier transform infrared (FTIR) analysis with the probe molecules CO and pyridine was carried out to characterize the surface properties. The catalytic activity was measured at 573 K and 3.1 MPa in a three-phase fixed-bed reactor for hydrodesulfurization (HDS) and hydrodenitrogenation (HDN) using a model liquid feed. At standardmore »« less
DOI: 10.1016/j.jcat.2005.12.029
In situ Moessbauer emission spectroscopy studies of unsupported and supported sulfided Co-Mo hydrodesulfurization catalysts: evidence for and nature of a Co-Mo-S phase

Topsoee, H. ; Clausen, B.S. ; Candia, R. ; ... - J. Catal.; (United States)

Information regarding the structure and type of phases present in sulfided alumina-supported, as well as unsupported, Co-Mo catalysts is obtained from in situ Moessbauer emission spectroscopy (MES) studies. The results give the first direct evidence of the presence of a Co-Mo-S phase in alumina-supported and unsupported catalysts with similar Co/Mo ratios. Information regarding the nature of the Co-Mo-S phase is obtained from a detailed study of the Moessbauer parameters, their temperature dependence, and their sensitivity to changes in the gaseous environment. Previously proposed structural models cannot explain all the observed features of the Co-Mo-S phase. It is proposed that inmore »« less
Catalytic significance of a Co-Mo-S phase in Co-Mo/Al/sub 2/O/sub 3/ hydrodesulfurization catalysts: combined in situ Moessbauer emission spectroscopy and activity studies

Wivel, C. ; Candia, R. ; Clausen, B.S. ; ... - J. Catal.; (United States)

A series of sulfided Co-Mo/Al/sub 2/O/sub 3/ catalysts with different Co/Mo ratios but with constant molybdenum content is investigated. The catalysts are characterized by in situ Moessbauer emission spectroscopy (MES) and investigated for their thiophene hydrodesulfurization activity. The catalytic activity shows a pronounced maximum at a Co/Mo ratio of about 1.0. The MES spectra reveal that cobalt may be present in three distinctly different phases: cobalt located in the alumina lattice (Co:Al/sub 2/O/sub 3/), cobalt in Co/sub 9/S/sub 8/, and cobalt located in the Co-Mo-S surface phase discussed in the preceeding paper. It is found that the relative amounts ofmore »« less