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Enhancement Of Dibenzothiophene Hydrodesulphurization Via Hydrogenation Route On Nimow Catalyst Supported On Hms Modified With Ti, Rafael Maya-Yescas 2018 Universidad Michoacana de San Nicolas de Hidalgo

Enhancement Of Dibenzothiophene Hydrodesulphurization Via Hydrogenation Route On Nimow Catalyst Supported On Hms Modified With Ti, Rafael Maya-Yescas

Rafael Maya-Yescas

This study shows that ternary Ni-Mo-W sulfide catalysts supported on hexagonal mesoporous silica modified with Ti (HMS-Ti) showed a high enhancement of dibenzothiophene (DBT) transformation via hydrogenation route with respect to their Ti-free counterpart. The reaction of hydrodesulphurization (HDS) of DBT was carried out at in a batch reactor at 320 °C and 5.5 MPa of total H2 pressure. The catalysts were characterized by a variety of techniques (chemical analysis, N2 adsorption-desorption isotherms, low- and wide-angles XRD, TPR, TPDNH, DRS UV–vis, TPO/TG and HRTEM). At reaction time of 5 h, all synthetized catalysts exhibited higher DBT conversion ...


Selective Conversion Of Biomass-Derived Oxygenates Over Bimetallic Catalysts, Steven Zhou, Jason Yang 2018 Selected Works

Selective Conversion Of Biomass-Derived Oxygenates Over Bimetallic Catalysts, Steven Zhou, Jason Yang

Steven Zhou

Biomass contains a large variety amounts of oxygenates, which can be converted into bio-fuels and valuable chemicals. Pt-based and Pd-based catalysts show good activity for these reactions. However, these mono-metallic catalysts typically cause issues of either poor selectivity towards target product or low stability (thus deactivation). Bimetallic catalysts could alter selectivity and improve stability, especically for cases when methane is involved for biomass-derived oxygenate conversions. The present study proposes a roadmap for using such bimetallic
catalysts for biomass-derived oxygenate conversion.


Selective Conversion Of Biomass-Derived Oxygenates Over Bimetallic Catalysts, Steven Zhou, Jason Yang 2018 Selected Works

Selective Conversion Of Biomass-Derived Oxygenates Over Bimetallic Catalysts, Steven Zhou, Jason Yang

Jason Yang

Biomass contains a large variety amounts of oxygenates, which can be converted into bio-fuels and valuable chemicals. Pt-based and Pd-based catalysts show good activity for these reactions. However, these mono-metallic catalysts typically cause issues of either poor selectivity towards target product or low stability (thus deactivation). Bimetallic catalysts could alter selectivity and improve stability, especically for cases when methane is involved for biomass derived oxygenate conversions. The present study proposes a roadmap for using such bimetallic
catalysts for biomass-derived oxygenate conversion.


Turnover Frequency (Tof) For Insight Into Reaction Rates Via Noble Metal Supported Catalysts, Steven Zhou, Jason Yang 2018 Selected Works

Turnover Frequency (Tof) For Insight Into Reaction Rates Via Noble Metal Supported Catalysts, Steven Zhou, Jason Yang

Jason Yang

Turnover frequency (TOF) refers to the number of reacted molecules per surface active site per time for a catalytic reaction. Today, rate data in arbitrary units or plots of conversion versus time are slowly becoming the exception rather than the rule in the scientific literature of catalysis. With only one unit, a value of TOF offers a straightforward way to compare data obtained in different laboratories. In the present work, we show TOF measurement approach and insight into noble metal supported catalysis it provides.


Laboratory Catalytic Reactors For Testing Heterogeneous Catalysts: A Practical Introduction, Steven Zhou, Jason Yang 2018 Selected Works

Laboratory Catalytic Reactors For Testing Heterogeneous Catalysts: A Practical Introduction, Steven Zhou, Jason Yang

Jason Yang

Laboratory catalytic reactors are commonly used to evaluate performance of heterogeneous catalysts. It is of importance to select appropriate reactors for specific catalytic system before actual experiments are carried out. In the present work, various laboratory catalytic reactors are introduced and summarized for testing heterogeneous catalysts.


Laboratory Catalytic Reactors For Testing Heterogeneous Catalysts: A Practical Introduction, Steven Zhou, Jason Yang 2018 Selected Works

Laboratory Catalytic Reactors For Testing Heterogeneous Catalysts: A Practical Introduction, Steven Zhou, Jason Yang

Steven Zhou

Laboratory catalytic reactors are commonly used to evaluate performance of heterogeneous catalysts. It is of importance to select appropriate reactors for specific catalytic system before actual experiments are carried out. In the present work, various laboratory catalytic reactors are introduced and summarized for testing heterogeneous catalysts.


Turnover Frequency (Tof) For Insight Into Reaction Rates Via Noble Metal Supported Catalysts, Steven Zhou, Jason Yang 2018 Selected Works

Turnover Frequency (Tof) For Insight Into Reaction Rates Via Noble Metal Supported Catalysts, Steven Zhou, Jason Yang

Steven Zhou

Turnover frequency (TOF) refers to the number of reacted molecules per surface active site per time for a catalytic reaction. Today, rate data in arbitrary units or plots of conversion versus time are slowly becoming the exception rather than the rule in the scientific literature of catalysis. With only one unit, a value of TOF offers a straightforward way to compare data obtained in different laboratories. In the present work, we show TOF measurement approach and insight into noble metal supported catalysis it provides.


Photocatalytic Hydrogen Production Using A Mesoporous Tio2 Doped With Pt: Semiconductor Synthesis, Oxidation-Reduction Network And Quantum Efficiencies., Jesus Fabricio Guayaquil-Sosa 2018 The University of Western Ontario

Photocatalytic Hydrogen Production Using A Mesoporous Tio2 Doped With Pt: Semiconductor Synthesis, Oxidation-Reduction Network And Quantum Efficiencies., Jesus Fabricio Guayaquil-Sosa

Electronic Thesis and Dissertation Repository

The present PhD dissertation establishes that hydrogen can be produced using mesoporous TiO2 as a photocatalyst, doped with platinum atoms (Pt), in a slurry medium, under near-UV irradiation and with ethanol as a sacrificial reagent (scavenger). These mesoporous TiO2 photocatalysts were prepared using a sol-gel method. The mesoporous Pt-TiO2 photocatalyst displayed a reduced 2.34 eV band gap compared to the bare TiO2 (3.20 eV).

Photocatalytic hydrogen production experiments were performed in a Photo-CREC Water II Reactor (PCW-II Reactor). This novel unit provides both radial and axial symmetrical irradiation profiles. Furthermore, macroscopic energy balances developed ...


Call For Abstracts - Resrb 2018, June 18-20, Brussels, Belgium, Wojciech M. Budzianowski 2017 Wojciech Budzianowski Consulting Services

Call For Abstracts - Resrb 2018, June 18-20, Brussels, Belgium, Wojciech M. Budzianowski

Wojciech Budzianowski

No abstract provided.


Registration Form Resrb 2018, Wojciech M. Budzianowski 2017 Wojciech Budzianowski Consulting Services

Registration Form Resrb 2018, Wojciech M. Budzianowski

Wojciech Budzianowski

No abstract provided.


Abstract Template Resrb 2018, Wojciech M. Budzianowski 2017 Wojciech Budzianowski Consulting Services

Abstract Template Resrb 2018, Wojciech M. Budzianowski

Wojciech Budzianowski

No abstract provided.


Catalytic Performance Tests For Bio-Oil Upgrading, Steven Zhou, Jason Yang 2017 Selected Works

Catalytic Performance Tests For Bio-Oil Upgrading, Steven Zhou, Jason Yang

Jason Yang

The easiest, and by far the most common, way to carry out a heterogeneously catalyzed gas phase reaction is by passing the gas mixture over a fixed catalyst. Bio-oil is a synthetic fuel under investigation as substitute for petroleum. In the present work, catalytic performance tests for bio-oil upgrading are discussed and reviewed. It is concluded that appropriate catalytic tests in reactors provide insight into bio-oil upgrading mechanism and process scale-up.


Effects Of Heterogeneous Catalyst Preparation Methods On Biomass Conversion, Steven Zhou, Jason Yang 2017 Selected Works

Effects Of Heterogeneous Catalyst Preparation Methods On Biomass Conversion, Steven Zhou, Jason Yang

Steven Zhou

The molecules extracted from bio-based resources already contain functional groups, so that the synthesis of chemicals generally requires a lower number of steps than from alkanes, while heterogeneous catalysts are still required to convert these molecules to valuable chemicals and/or biofuels. Catalyst preparation method plays an important role in its performance for biomass conversion. In the present work, effects of heterogeneous catalyst preparation methods on biomass conversion are compared and discussed. For certain biomass molecules, specific catalyst preparation method is proposed.


Characterization Of Heterogeneous Catalysts For Glycerol Catalytic Conversion, Steven Zhou, Jason Yang 2017 Selected Works

Characterization Of Heterogeneous Catalysts For Glycerol Catalytic Conversion, Steven Zhou, Jason Yang

Jason Yang

Catalyst characterization, if properly utilized, can be both the cornerstone of the science of catalysis and the catalyst in its own right for industrial progress. Glycerol, also called glycerine or glycerin, is a simple polyol compound. The glycerol backbone is found in all lipids known as triglycerides. It is widely used in the food industry as a sweetener and humectant and in pharmaceutical formulations. In the present work, various characterization techniques for catalytic conversion of glycerol are discussed and reviewed. It is concluded that in situ and opera-do characterization techniques provide insight into catalytic glycerol conversion for valuable chemicals and ...


Effects Of Heterogeneous Catalyst Preparation Methods On Biomass Conversion, Steven Zhou, Jason Yang 2017 Selected Works

Effects Of Heterogeneous Catalyst Preparation Methods On Biomass Conversion, Steven Zhou, Jason Yang

Jason Yang

The molecules extracted from bio-based resources already contain functional groups, so that the synthesis of chemicals generally requires a lower number of steps than from alkanes, while heterogeneous catalysts are still required to convert these molecules to valuable chemicals and/or biofuels. Catalyst preparation method plays an important role in its performance for biomass conversion. In the present work, effects of heterogeneous catalyst preparation methods on biomass conversion are compared and discussed. For certain biomass molecules, specific catalyst preparation method is proposed.


Density Functional Theory Calculations For Sustainable Chemicals And Fuels Production, Steven Zhou, Jason Yang 2017 Selected Works

Density Functional Theory Calculations For Sustainable Chemicals And Fuels Production, Steven Zhou, Jason Yang

Jason Yang

The fossil fuels produced and consumed today are products from a very complex mix of processes. These processes of nature have been and still are of great inspiration to those who are developing biomass conversion processes today. Density functional theory (DFT) is a computational quantum mechanical modelling method used in physics, chemistry and materials science to investigate the electronic structure (principally the ground state) of many-body systems, in particular atoms, molecules, and the condensed phases. In the present work, DFT calculations for sustainable chemicals and fuels production are reviewed and discussed. It is concluded that DFT
calculations provide insight into ...


Kinetic Model Development For Heterogeneous Catalysis, Jason Yang 2017 Selected Works

Kinetic Model Development For Heterogeneous Catalysis, Jason Yang

Jason Yang

Both experimental and mathematical model can be used in investigations on the influence of mass transfer between the external surface of a catalyst particle and the reaction mixture bulk. To carry out a intrinsic kinetic study, one must exclude both external and internal mass transfer effects.


Characterization Of Heterogeneous Catalysts For Glycerol Catalytic Conversion, Steven Zhou, Jason Yang 2017 Selected Works

Characterization Of Heterogeneous Catalysts For Glycerol Catalytic Conversion, Steven Zhou, Jason Yang

Steven Zhou

Catalyst characterization, if properly utilized, can be both the cornerstone of the science of catalysis and the catalyst in its own right for industrial progress. Glycerol, also called glycerine or glycerin, is a simple polyol compound. The glycerol backbone is found in all lipids known as triglycerides. It is widely used in the food industry as a sweetener and humectant and in pharmaceutical formulations. In the present work, various characterization techniques for catalytic conversion of glycerol are discussed and reviewed. It is concluded that in situ and opera-do characterization techniques provide insight into catalytic glycerol conversion for valuable chemicals and ...


Fabrication And Modification Of Titania Nanotube Arrays For Harvesting Solar Energy And Drug Delivery Applications, Ahmed El Ruby Abdel Rahman Mohamed 2017 The Universty of Western Ontario

Fabrication And Modification Of Titania Nanotube Arrays For Harvesting Solar Energy And Drug Delivery Applications, Ahmed El Ruby Abdel Rahman Mohamed

Electronic Thesis and Dissertation Repository

The fast diminishing of fossil fuels in the near future, as well as the global warming caused by increasing greenhouse gases have motivated the urgent quest to develop advanced materials as cost-effective photoanodes for solar light harvesting and many other photocatalytic applications. Recently, titania nanotube arrays (TNTAs) fabricated by anodization process has attracted great interest due to their excellent properties such as: high surface area, vertically oriented, highly organized, one-dimensional, nanotubular structure, photoactivity, chemical stability and biocompatibility. This unique combination of excellent properties makes TNTAs an excellent photoanode for solar light harvesting. However, the relatively wide band gap energy of ...


Hydrodeoxygenation Of Anisole In A Novel Externally Agitated Reactor, Brett Pomeroy 2017 The University of Western Ontario

Hydrodeoxygenation Of Anisole In A Novel Externally Agitated Reactor, Brett Pomeroy

Electronic Thesis and Dissertation Repository

Bio-oil upgrading via hydrodeoxygenation (HDO) was investigated using anisole, a model compound, in a novel Externally Agitated (EA) reactor which is expected to enhance gas-liquid-solid mixing. Operating conditions were established based on anisole HDO with 10 wt.% Ni on silica, γ-alumina, and δ-alumina while varying temperatures between 160 to 280oC, and reaction times between 30 – 90 minutes. Mild temperatures of 220oC and 45 minutes for reaction time with γ-alumina were selected for subsequent work since γ-alumina demonstrated the highest HDO activity. HDO was then investigated with varying Ni-Cu and Ni loadings. Despite the improved reducibility from ...


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