Effects of K and Pt promoters on the performance of cobalt catalyst supported on CNTs

Ali, Sardar; Subbarao, Duvvuri

doi:10.1063/1.4898439

Title: Effects of K and Pt promoters on the performance of cobalt catalyst supported on CNTs

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Abstract

This paper presents a comparative study on the effects of incorporation of potassium (K) and platinum (Pt) as promoters on the physicochemical properties of cobalt catalyst. The catalyst was prepared by a wet impregnation method on a CNTs support. Samples were characterized using transmission electron microscopy (TEM), H{sub 2}-temperature-programmed reduction (TPR) and X-ray photoelectron spectroscopy (XPS) techniques. Fischer-Tropsch Synthesis (FTS) was carried out in a fixed-bed microreactor at 543 K and 1 atm, with H{sub 2}/CO = 2v/v and space velocity, SV of 12 L/g.h for 5 hours. The K-promoted and Pt-promoted Co catalysts have different physicochemical properties and catalytic performances compared to that of the un-promoted Co catalyst. XPS analysis revealed that K and Pt promoters induced electronic modifications as exhibited by the shifts in the Co binding energies. Incorporation of 0.06 wt% K and 0.06 wt% Pt in Co/CNTs catalyst resulted in an increase in the CO conversion and C{sub 5+} selectivity and a decrease in methane selectivity. Potassium was found to be a better promoter for Co/CNTs catalyst compared to platinum.

Authors:

Ali, Sardar ^[1]; Subbarao, Duvvuri ^[2]

Centralized Analytical Laboratory, Universiti Teknologi PETRONAS, Bandar Seri Iskandar, 31750 Tronoh, Perak (Malaysia)
Department of Chemical Engineering, Universiti Teknologi PETRONAS, Bandar Seri Iskandar, 31750 Tronoh, Perak (Malaysia)

Publication Date:: Fri Oct 24 00:00:00 EDT 2014

OSTI Identifier:: 22308052

Resource Type:: Journal Article

Journal Name:: AIP Conference Proceedings

Additional Journal Information:: Journal Volume: 1621; Journal Issue: 1; Conference: ICSAS 2014: 3. international conference on fundamental and applied sciences: Innovative research in applied sciences for a sustainable future, Kuala Lumpur (Malaysia), 3-5 Jun 2014; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0094-243X

Country of Publication:: United States

Language:: English

Subject:: 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; BINDING ENERGY; CATALYSTS; COBALT; COMPARATIVE EVALUATIONS; FISCHER-TROPSCH SYNTHESIS; HYDROGEN; IMPREGNATION; MODIFICATIONS; PACKED BEDS; PERFORMANCE; PLATINUM; POTASSIUM; TRANSMISSION ELECTRON MICROSCOPY; X-RAY PHOTOELECTRON SPECTROSCOPY

Citation Formats


                    Zabidi, Noor Asmawati Mohd, E-mail: noorasmawati-mzabidi@petronas.com.my, Ali, Sardar, and Subbarao, Duvvuri. Effects of K and Pt promoters on the performance of cobalt catalyst supported on CNTs.  United States: N. p., 2014. 
        Web.  doi:10.1063/1.4898439.

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                    Zabidi, Noor Asmawati Mohd, E-mail: noorasmawati-mzabidi@petronas.com.my, Ali, Sardar, & Subbarao, Duvvuri. Effects of K and Pt promoters on the performance of cobalt catalyst supported on CNTs.  United States.  https://doi.org/10.1063/1.4898439

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                    Zabidi, Noor Asmawati Mohd, E-mail: noorasmawati-mzabidi@petronas.com.my, Ali, Sardar, and Subbarao, Duvvuri. 2014.  
        "Effects of K and Pt promoters on the performance of cobalt catalyst supported on CNTs".  United States.  https://doi.org/10.1063/1.4898439.

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@article{osti_22308052,

  title        = {Effects of K and Pt promoters on the performance of cobalt catalyst supported on CNTs},

  author       = {Zabidi, Noor Asmawati Mohd, E-mail: noorasmawati-mzabidi@petronas.com.my and Ali, Sardar and Subbarao, Duvvuri},

  abstractNote = {This paper presents a comparative study on the effects of incorporation of potassium (K) and platinum (Pt) as promoters on the physicochemical properties of cobalt catalyst. The catalyst was prepared by a wet impregnation method on a CNTs support. Samples were characterized using transmission electron microscopy (TEM), H{sub 2}-temperature-programmed reduction (TPR) and X-ray photoelectron spectroscopy (XPS) techniques. Fischer-Tropsch Synthesis (FTS) was carried out in a fixed-bed microreactor at 543 K and 1 atm, with H{sub 2}/CO = 2v/v and space velocity, SV of 12 L/g.h for 5 hours. The K-promoted and Pt-promoted Co catalysts have different physicochemical properties and catalytic performances compared to that of the un-promoted Co catalyst. XPS analysis revealed that K and Pt promoters induced electronic modifications as exhibited by the shifts in the Co binding energies. Incorporation of 0.06 wt% K and 0.06 wt% Pt in Co/CNTs catalyst resulted in an increase in the CO conversion and C{sub 5+} selectivity and a decrease in methane selectivity. Potassium was found to be a better promoter for Co/CNTs catalyst compared to platinum.},

  doi          = {10.1063/1.4898439},

  url          = {https://www.osti.gov/biblio/22308052},
  journal      = {AIP Conference Proceedings},

  issn         = {0094-243X},

  number       = 1,

  volume       = 1621,

  place        = {United States},

  year         = {Fri Oct 24 00:00:00 EDT 2014},

  month        = {Fri Oct 24 00:00:00 EDT 2014}

}

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