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Browsing Kimya Mühendisliği by Subject "Water-gas."

Browsing Kimya Mühendisliği by Subject "Water-gas."

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  • A DFT study on interaction between Au, Re and Au-Re surfaces with species involved in WGS reaction 
    Uzun, Ali. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2012., 2012.)
    In this study, the steps of WGS reaction was investigated through studying the adsorption/co-adsorption of its reactants, products and possible intermediate species on Au(111), Re(001) and Au-Re(001) surfaces at atomic ...
  • A study on biometallic water gas shift catalysts to be used ın fuel processing 
    Güven, Sabriye. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2009., 2009.)
    The aim of this study is to design and develop a Au-based, bimetallic WGS catalyst which has suitable activity and selectivity characteristics to be used in a fuel processor. The catalyst composition, preparation method, ...
  • An experimental study on optimization of Pt-based trimetallic WGS catalysts 
    Kesim, Bahar. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2017., 2017.)
    The overall purpose of this study is to design and develop Pt-based, CeO2 supported trimetallic Pt-Re-V/CeO2 catalysts(s) having high WGS activity, selectivity and stability with suppressed methanation under realistic feed ...
  • An experimental study on the effect of metal loadings on WGS performance of Au-Re system 
    Yoğurtçu, Burcu. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2012., 2012.)
    The aim of the current work is to understand the effect of Au and Re loadings and Au:Re loading ratio on the WGS performance of the Au-Re/CeO2 system under the flow of realistic feeds. In this experimental work, water-gas ...
  • An experimental study on WGS catalysts: Relating performance under realistic feel with oxygen holding capacity 
    Öztürk, Gözde. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2018., 2018.)
    The present work is a part of an ongoing study aiming to design and develop high performance, steam tolerant, non-pyrophoric WGS catalyst(s) to be used in a demo-scale fuel processor (DFP) producing PEM grade hydrogen for ...
  • Ceria coated microchannel reactor for water-gas shift reaction 
    Koca, Begüm. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2016., 2016.)
    In this study, it is aimed to develop a method for coating Pt/CeO2/Al2O3 catalyst onto the FeCrAlY-based wall of a microchannel reactor and to study watergas shift (WGS) in the context of a parametric study. Firstly, the ...
  • Characterization and performance analysis of fuel flexible OSR-WGS catalysts 
    Gökaliler, Feyza. (Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2012., 2012.)
    This research study was conducted in order to acquire insight of an efficient fuel processor (FP) since FPs are believed to represent a key step of transition from conventional to decentralized energy production when ...
  • Comparison of the performances of different catalytic reactor types for the water-gas shift reaction using computer simulations 
    İlhan, Nilüfer. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2008., 2008.)
    The low temperature water-gas shift reaction is mathematically modeled for packedbed and monolith reactors by applying mass, energy and momentum balances at steadystate. One-dimensional pseudo-homogeneous and heterogeneous ...
  • Comperative study of low temperature water gas shift reaction over partıculate and monolithic catalysts 
    Tuna, Sevinç. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2009., 2009.)
    Low temperature water gas shift (LTWGS) performance of supported Pt-ceria catalysts was investigated over particulate and monolithic structures using both pure and mixed realistic feed compositions in the 225-300oC range. ...
  • Construction and testing of a low-temperature water-gas shift reaction system 
    Şen, Özlem. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2008., 2008.)
    The objective of this study was to construct and test of a low-temperature water-gas shift reaction system. A system consisting of mass flow controllers for gases, HPLC pump for water, an evaporation and gas-mixing section, ...
  • Design and development of Pt-based trimetallic WGS catalysts 
    Özer, Özgü (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2016., 2016.)
    The aim of this study is to design and develop Pt-based catalysts having high WGS performance with suppressed methanation activity in HTS-LTS transition temperature region. In this context, a series of trimetallic Pt-Re-V/CeO2 ...
  • Design and development of WGS catalysts for small scale hydrogen production units 
    Demirhan, Coşar Doğa. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2015., 2015.)
    The aim of this work is to design and develop Au-based catalysts that suppress secondary methanation activity and show high WGS activity and stability. In this context trimetallic Au-Re-V/CeO2 catalysts were prepared, ...
  • Investigation of water gas shift reaction over MOF assisted precious metal catalysts 
    Kavaklı, Hayri Onur. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2014., 2014.)
    Low temperature Water-Gas Shift (WGS) reaction is investigated over MOFsupported Pt/MIL-53(Al) catalysts in 250-300 oC range and steam-to-carbon (S/C) ratios of 1.67, 2.33 and 3. Pt metal loadings of 0.5, 1.0 and 1.5 per ...
  • Low temperature water gas shift reaction over promoted Pt-based catalysts 
    Akpınar, Fatma. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2009., 2009.)
    The aim of this study was to investigate the effects of various second promoters on Pt- Co/Al2O3 and Pt-Ce/Al2O3 catalysts for water gas shift reaction. For this purpose, seven metal oxides were used as the second promoters. ...
  • Parametric investigation of water gas shift over Pd based catalysts 
    Ertem, Özge. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2014., 2014.)
    The purpose of this study is to investigate WGS reaction over Pd based catalysts, cheaper alternatives of Au and Pt, and explore the impact of reactor structuring on CO conversion. The Pd based catalysts used in this ...
  • Parametric study of water-gas shift reaction over Pt-based catalysts 
    Çağlar, Özgür Yaşar. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2015., 2015.)
    In this study, parametric investigation of low temperature water-gas shift reaction over Pt-based catalysts is carried out. Effects of reaction temperature, feed composition, catalyst particle size and reactor geometry on ...
  • Study of low temperature water gas shift reaction on promoted Au/Al2O3 catalysts 
    Güneş, Hacer. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2009., 2009.)
    The goal of this research was to test the activity of the promoted Au/Al2O3 catalyst for the low temperature water gas shift (LT-WGS) reaction. First, a series of 1.25 wt.% Au/MOx/γ-Al2O3 (M= Ce, Mg, Fe, Mn, Co, Ni) catalysts ...
  • The effect of support type on water-gas shift kinetics over Pt based trimetallic systems 
    İbrahimov, Nijat. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2020., 2020.)
    The aim of the current study is to determine the power law type rate expressions of water-gas shift (WGS) reaction over 1Pt-1Re-1Na/CeO2 and 1Pt-1Re-1Na/TiO2 catalysts under realistic feed conditions. In this context, the ...
  • WGS kinetics over Pt-based trimetallic catalyst under realistic conditions 
    Yumru, Gizem. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2017., 2017.)
    The aim of this study is to obtain a reliable power law type kinetic expression under realistic conditions for water-gas shift reaction over 1Pt-0.5Re-1V/CeO2 catalyst to be used in designing the WGS unit of a small scale ...

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