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Yazar "Aksoylu, Ahmet Erhan." için listeleme

Yazar "Aksoylu, Ahmet Erhan." için listeleme

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  • 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 Pt-based bimetallic oxidative steam reforming (OSR) catalysts 
    Göçmen, Bayram Ali. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2009., 2010.)
    In the current study, Pt-Ni/Al2O3 system was optimized for catalytic hydrogen production via oxidative steam reforming of propane. Oxidative steam reforming of propane was tested over four Pt-Ni/d-Al2O3 bimetallic and one ...
  • 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 ...
  • An in situ FTIR-drifts study on bimetallic CDRM catalysts 
    Demirel, Salih Emre. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2015., 2015.)
    The purpose of this research was to gain a deeper insight into the difference between the micro-structural and kinetic properties of two bimetallic catalysts, i.e. 0.3Pt10Ni/Al2O3 and 0.2Pt15Ni/Al2O3, which have been ...
  • An Investigation of hydrogen storage in carbon nanotubes via computational MM methods 
    Atay, Güven. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2005., 2005.)
    In this study, hydrogen storage behaviour of single wall carbon nanotubes wasinvestigated using moleculer mechanics. Accelerys̕ Discover Minimization module wasemployed with COMPASS (Condensed-phase Optimized Molecular ...
  • An investigation of on the properties of Pt-based surface alloys via computational QM methods 
    Sümer, Aslıhan. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2004., 2004.)
    The adsorption properties of CO on stepped Pt3Sn(102) surface were investigated using quantum mechanical calculations. The two possible terminations of experimentally verified stepped surface, Pt3Sn (102), were generated ...
  • Carbon dioxide adsorption on flat Pt3Sn surfaces 
    Başaran, Duygu. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2007., 2007.)
    The experimental studies have shown that the PROX activity of the Pt{Sn/AC catalyst is either unaffected or positively affected from the presence of carbon dioxide in the feed mixture. The catalyst characterization studies ...
  • 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 ...
  • Construction and testing of a bench- scale reactor system for autothermal reforming of methane 
    Öztürk, İlker. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2009., 2009.)
    The major aim of this study was the construction and testing of a bench-scale reactor system suitable for studying the steam reforming (SR) and auto-thermal reforming (ATR) of methane to produce clean hydrogen with high ...
  • Design and development of catalysts & adsorbents for COx free H2 production 
    Selen, Burcu. (Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2011., 2011.)
    The overall purpose of this research study is to produce, characterize and investigate the performance of catalysts and adsorbents which will play a role in COx-free hydrogen production via fuel processing for fuel cell ...
  • Design and development of efficient catalysts and determination of reaction mechanism for carbon dioxide reforming of methane (CDRM) 
    Paksoy, Aysun İpek. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2016., 2016.)
    The aim of the current work is to design and develop effective non-PGM based CDRM catalysts, to confirm the roles of each catalyst component, to determine optimum reaction conditions for the highest performance, and to ...
  • 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, ...
  • Design, construction and testing of a lab scale fuel processor prototype for dynamic performance studies 
    Başar, Melek Selcen. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2010., 2010.)
    The aim of this study is to design, construct and test a fuel processor prototype for catalyst performance studies under steady-state and dynamic operation conditions. The propane fuel processor consisted of a main oven ...
  • Exergy analysis of combined fuel processor-fuel cell system 
    Şeyban, Cüneyt. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2008., 2008.)
    Exergy analysis and energy efficiency of a combined fuel processor-fuel cell system was performed. Experimental data were used for the performances of the ATR, WGS and PROX catalytic reactors assuming that the concentrations ...
  • Interaction between CO and PtSn alloy: a theoretical study on understanding selective CO oxidation 
    Duru, Birim. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2008., 2008.)
    The adsorption properties of CO on PtSn(110) surface were investigated via quantum mechanical calculations. The adsorption energies and the geometries of CO molecule for all possible adsorption sites were calculated. The ...
  • Modeling of catalytic plate reactors for fuel processor seystems 
    Kırçın, Rafet Murat. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2009., 2009.)
    The mathematical model of a catalytic plate reactor (CPR) in which hydrogen is produced by two different reaction pairs, namely, exothermic methane total oxidation coupled with either ethanol steam reforming or ethane ...
  • Modeling of methane autothermal reforming in a cylindrical Pt-Ni washcoated reactor 
    Kurdoğlu, Beyza. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2009., 2009.)
    The catalytic indirect partial oxidation (combined total oxidation and steam reforming) reactor for the conversion of methane to hydrogen for fuel cell applications is investigated using computer–based modeling techniques ...
  • Preferential oxidation performance of Pt-Sn/AC catalysts 
    Soykal, İbrahim Ilgaz. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2008., 2008.)
    Preferential low temperature CO oxidation was studied to find out the effect of H2O, CO2, CH4 and O2 to CO ratio in the feed stream. Moreover the effect of temperature is also studied on 1% Pt-0.25%Sn/AC. ...