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CO2-assisted propane dehydrogenation over Pt-based catalysts : looking inside via in situ X-ray absorption spectroscopy

(2022)
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(UGent) and (UGent)
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Abstract
Propylene is the basic raw material for the production of polypropylene, acrylonitrile, propylene oxide and other industrial products. Propane dehydrogenation (PDH) is an important synthesis route towards selective propylene production. It is an endothermic equilibrium-limited reaction, for which catalyst deactivation through carbon formation and sintering is an issue. Pt-based bimetallic catalysts are typically employed for this process as the addition of the promoter element leads to improved resistance to carbon formation and sintering. The first part of this thesis investigates the potential applicability of CO2 in the feed along with propane as CO2-PDH. CO2 assists in shifting the equilibrium towards product formation through the reverse water gas shift reaction and suppresses carbon formation through the reverse Boudouard reaction. Three different promoter elements were explored and a strong correlation was established between the promoter’s potential to oxidation by CO2 and its activity towards CO2-PDH. The second part of this work looks into the potential benefit of an Al2O3 coating applied by Atomic Layer Deposition on Pt-Ga catalysts for PDH. Advanced characterization techniques, such as X-ray Absorption Spectroscopy, Small Angle X-ray Scattering, CO-DRIFTS, etc., were utilized to answer the research questions for both parts.
Keywords
X-ray Absorption Spectroscopy, XAS, Platinum catalyst, Bimetallic catalysts, Nanoparticles, Propane dehydrogenation, PDH, Small Angle X-ray Scattering, SAXS, Platinum-Tin alloy, Platinum-Gallium Alloy, Platinum-Indium alloy, Atomic Layer Deposition (ALD), Alumina coating

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Citation

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MLA
Nadadur Veeraraghavan Srinath. CO2-Assisted Propane Dehydrogenation over Pt-Based Catalysts : Looking inside via in Situ X-Ray Absorption Spectroscopy. Ghent University. Faculty of Engineering and Architecture, 2022.
APA
Nadadur Veeraraghavan Srinath. (2022). CO2-assisted propane dehydrogenation over Pt-based catalysts : looking inside via in situ X-ray absorption spectroscopy. Ghent University. Faculty of Engineering and Architecture, Ghent, Belgium.
Chicago author-date
Nadadur Veeraraghavan Srinath. 2022. “CO2-Assisted Propane Dehydrogenation over Pt-Based Catalysts : Looking inside via in Situ X-Ray Absorption Spectroscopy.” Ghent, Belgium: Ghent University. Faculty of Engineering and Architecture.
Chicago author-date (all authors)
Nadadur Veeraraghavan Srinath. 2022. “CO2-Assisted Propane Dehydrogenation over Pt-Based Catalysts : Looking inside via in Situ X-Ray Absorption Spectroscopy.” Ghent, Belgium: Ghent University. Faculty of Engineering and Architecture.
Vancouver
1.
Nadadur Veeraraghavan Srinath. CO2-assisted propane dehydrogenation over Pt-based catalysts : looking inside via in situ X-ray absorption spectroscopy. [Ghent, Belgium]: Ghent University. Faculty of Engineering and Architecture; 2022.
IEEE
[1]
Nadadur Veeraraghavan Srinath, “CO2-assisted propane dehydrogenation over Pt-based catalysts : looking inside via in situ X-ray absorption spectroscopy,” Ghent University. Faculty of Engineering and Architecture, Ghent, Belgium, 2022.
@phdthesis{8744590,
  abstract     = {{Propylene is the basic raw material for the production of polypropylene, acrylonitrile, propylene oxide and other industrial products. Propane dehydrogenation (PDH) is an important synthesis route towards selective propylene production. It is an endothermic equilibrium-limited reaction, for which catalyst deactivation through carbon formation and sintering is an issue. Pt-based bimetallic catalysts are typically employed for this process as the addition of the promoter element leads to improved resistance to carbon formation and sintering.
The first part of this thesis investigates the potential applicability of CO2 in the feed along with propane as CO2-PDH. CO2 assists in shifting the equilibrium towards product formation through the reverse water gas shift reaction and suppresses carbon formation through the reverse Boudouard reaction. Three different promoter elements were explored and a strong correlation was established between the promoter’s potential to oxidation by CO2 and its activity towards CO2-PDH. The second part of this work looks into the potential benefit of an Al2O3 coating applied by Atomic Layer Deposition on Pt-Ga catalysts for PDH. Advanced characterization techniques, such as X-ray Absorption Spectroscopy, Small Angle X-ray Scattering, CO-DRIFTS, etc., were utilized to answer the research questions for both parts.}},
  author       = {{Nadadur Veeraraghavan Srinath}},
  isbn         = {{9789463555807}},
  keywords     = {{X-ray Absorption Spectroscopy,XAS,Platinum catalyst,Bimetallic catalysts,Nanoparticles,Propane dehydrogenation,PDH,Small Angle X-ray Scattering,SAXS,Platinum-Tin alloy,Platinum-Gallium Alloy,Platinum-Indium alloy,Atomic Layer Deposition (ALD),Alumina coating}},
  language     = {{eng}},
  pages        = {{XLVIII, 244}},
  publisher    = {{Ghent University. Faculty of Engineering and Architecture}},
  school       = {{Ghent University}},
  title        = {{CO2-assisted propane dehydrogenation over Pt-based catalysts : looking inside via in situ X-ray absorption spectroscopy}},
  year         = {{2022}},
}