Open Access. Powered by Scholars. Published by Universities.®
- Discipline
-
- Catalysis and Reaction Engineering (34)
- Physical Sciences and Mathematics (23)
- Chemistry (18)
- Materials Science and Engineering (17)
- Engineering Science and Materials (13)
-
- Materials Chemistry (13)
- Physical Chemistry (12)
- Electrical and Computer Engineering (11)
- Power and Energy (10)
- Nanoscience and Nanotechnology (7)
- Environmental Sciences (5)
- Mechanical Engineering (5)
- Oil, Gas, and Energy (5)
- Bioresource and Agricultural Engineering (2)
- Metallurgy (2)
- Polymer Chemistry (2)
- Polymer Science (2)
- Thermodynamics (2)
- Civil Engineering (1)
- Civil and Environmental Engineering (1)
- Computer Engineering (1)
- Electrical and Electronics (1)
- Energy Systems (1)
- Environmental Chemistry (1)
- Heat Transfer, Combustion (1)
- Inorganic Chemistry (1)
- Manufacturing (1)
- Mechanics of Materials (1)
- Institution
-
- Chinese Chemical Society | Xiamen University (11)
- University of South Carolina (7)
- Louisiana State University (6)
- Missouri University of Science and Technology (5)
- The British University in Egypt (5)
-
- Purdue University (3)
- Tashkent Institute of Chemical Technology (3)
- Universitas Indonesia (3)
- University of Kentucky (3)
- University of New Mexico (3)
- Edith Cowan University (2)
- University of Texas at Tyler (2)
- West Virginia University (2)
- Brigham Young University (1)
- Case Western Reserve University (1)
- City University of New York (CUNY) (1)
- Georgia Southern University (1)
- Michigan Technological University (1)
- Oral Roberts University (1)
- Rowan University (1)
- Tashkent State Technical University (1)
- University at Albany, State University of New York (1)
- University of Arkansas, Fayetteville (1)
- University of Connecticut (1)
- University of Louisville (1)
- University of Nebraska - Lincoln (1)
- University of New Haven (1)
- University of Texas at El Paso (1)
- Wayne State University (1)
- Western Michigan University (1)
- Publication Year
- Publication
-
- Journal of Electrochemistry (11)
- Theses and Dissertations (8)
- Chemical Engineering (5)
- CHEMISTRY AND CHEMICAL ENGINEERING (3)
- Chemical and Biological Engineering ETDs (3)
-
- LSU Doctoral Dissertations (3)
- LSU Master's Theses (3)
- Chemical and Biochemical Engineering Faculty Research & Creative Works (2)
- Graduate Theses, Dissertations, and Problem Reports (ETD) (2)
- Makara Journal of Technology (2)
- Masters Theses (2)
- The Summer Undergraduate Research Fellowship (SURF) Symposium (2)
- Biosystems and Agricultural Engineering Faculty Publications (1)
- Center for Applied Energy Research Faculty and Staff Publications (1)
- Chemistry and Chemical Engineering Faculty Publications (1)
- College of Science and Engineering Faculty Research and Scholarship (1)
- Department of Agricultural and Biological Systems Engineering: Dissertations, Theses, and Student Research (1)
- Dissertations (1)
- Dissertations and Theses (1)
- Dissertations, Master's Theses and Master's Reports (1)
- Doctoral Dissertations (1)
- Electronic Theses and Dissertations (1)
- Faculty Publications (1)
- Faculty Scholarship (1)
- High School Lesson Plans (1)
- Honors College Theses (1)
- Honors Scholar Theses (1)
- Jasper Department of Chemical Engineering Faculty Publications and Presentations (1)
- Legacy Theses & Dissertations (2009 - 2024) (1)
- Makara Journal of Science (1)
- Publication Type
Articles 61 - 72 of 72
Full-Text Articles in Chemical Engineering
Catalytic Process For The Conversion Of Synthesis Gas To Ethanol For Use As An Alternative Fuel, Nitin Kumar
Catalytic Process For The Conversion Of Synthesis Gas To Ethanol For Use As An Alternative Fuel, Nitin Kumar
LSU Doctoral Dissertations
Higher alcohols are increasing as a proportion of the transportation fuel market, and can be used as neat fuels, or as blends with conventional fuels. For a number of reasons, these C2+-alcohols will be of interest in the foreseeable future. Large-scale production of higher alcohols will likely be carried out via syngas, which can be produced from a number of feedstocks, including coal, natural gas and biomass. Rhodium-based catalysts have been found to be the most active/selective for higher alcohols. However, the literature shows that the yields of C2+-alcohols that can be achieved with current catalysts, even the most active/selective, …
Sintering Of Metal Nanoparticles On Model Substrates, Levi R. Houk
Sintering Of Metal Nanoparticles On Model Substrates, Levi R. Houk
Chemical and Biological Engineering ETDs
The sintering of precious metal catalysts is an important problem for the automotive and chemical process industry. As these precious metal catalysts sinter, the metal nanoparticles grow, which in return causes a loss in the overall surface area from loss of the number of available reaction sites. At high temperatures, sintering as a thermally activated process occurs more rapidly and the energetics of the sample changes. In automotive catalysis, for the catalytic converter, the exhaust gases from automobiles contain carbon monoxide, nitrogen oxide compounds, and other hydrogen compounds, which are detrimental to the atmosphere, and a catalyst is required to …
The Sintering And Stability Of Catalytic Nano-Particles, Andrew Delariva
The Sintering And Stability Of Catalytic Nano-Particles, Andrew Delariva
Chemical and Biological Engineering ETDs
Studies were performed on three different catalysts in order to determine their stability and sintering behavior. Pd deposited on a flat single crystal substrate made of Al2O3 was characterized to determine if the mechanism of Ostwald ripening was solely dominated by vapor phase transport of metal atoms. The atoms emitted could be determined by the rate of evaporation and an attempt was then made in order to relate the rates of emission to sintering (instability of nanoparticles). It was found that the rates of emission did not fully reflect vapor phase transport (direct evaporation). The particle-support interaction was increasing the …
High Yield And Conversion Of Biodiesel From A Nonedible Feedstock (Pongamia Pinnata), Yogesh C. Sharma, Bhaskar Singh, John Korstad
High Yield And Conversion Of Biodiesel From A Nonedible Feedstock (Pongamia Pinnata), Yogesh C. Sharma, Bhaskar Singh, John Korstad
College of Science and Engineering Faculty Research and Scholarship
An efficient approach has been adopted for the synthesis of biodiesel developed from karanja, a nonedible oil feedstock. A two-step reaction was followed for synthesis of biodiesel. Karanja oil possessing a high free fatty acid content was esterified with sulfuric acid, and the product obtained was further converted to fatty acid alkyl esters (biodiesel) by transesterification reactions. A moderate molar ratio of 6:1 (methanol/oil) was efficient for acid esterification with 1.5% v/v H2SO4 and 1 h of reaction time at 60 ± 0.5 °C, which resulted in reduction of FFA from 19.88 to 1.86 mg of KOH/g. …
Design And Development Of Highly Active, Nanoengineered, Platinum Based Core-Shell Electrodes For Proton Exchange Membrane Fuel Cells, Seth Louis Knupp
Design And Development Of Highly Active, Nanoengineered, Platinum Based Core-Shell Electrodes For Proton Exchange Membrane Fuel Cells, Seth Louis Knupp
Legacy Theses & Dissertations (2009 - 2024)
Highly active nanoengineered core-shell electrocatalyst have a great potential to be used as fuel cell electrodes. They can alleviate problems related with commercial carbon supported platinum by simultaneously lowering cost while enhancing reaction kinetics and overall performance. More recently, use of nanoengineered core-shell electrode structures have showed their ability to enhance the stability and overall lifetime of the catalyst without sacrificing the electrode's performance. We studied the potential of using highly active core-shell nanoparticles supported on carbon nanomaterials as fuel cell electrodes.
X-Ray Absorption Spectroscopy Applied To Mixed-Metal Iron-Based Fischer-Tropsch Catalysts, Andrew Allen Campos
X-Ray Absorption Spectroscopy Applied To Mixed-Metal Iron-Based Fischer-Tropsch Catalysts, Andrew Allen Campos
LSU Doctoral Dissertations
Synthetic fuels derived from methane, coal or biomass are essential in addressing future transportation fuel demands which are expected to exceed petroleum-derived capacities. The Fischer-Tropsch synthesis (FTS) is the most studied technique for the conversion of coal or biomass-derived syngas into transportation fuels. Fe-based catalysts are typically used for the FTS of biomass and/or coal-derived syngas due to: the relatively low cost of iron, water-gas shift activity, and low methane selectivity at industrial FTS conditions. Fe/Cu/SiO2 Fischer-Tropsch catalysts promoted with Cr, Mn, Mo, W, or Zr were studied in-situ, using Fe K-edge TPR XANES (temperature programmed reduction X-ray absorption near-edge …
Electrodeposited Cu-Based Catalysts For Alcohols From Co Hydrogenation And Electrodeposition Of Cuniw/Cuni Multilayered Alloys, Mayank Gupta
Electrodeposited Cu-Based Catalysts For Alcohols From Co Hydrogenation And Electrodeposition Of Cuniw/Cuni Multilayered Alloys, Mayank Gupta
LSU Doctoral Dissertations
Ethanol and higher alcohols can be used as a fuel or fuel additive in gasoline engines as well as a hydrogen carrier. One of the promising methods to synthesize these alcohols is based on thermochemical conversion of CO and H2 (CO hydrogenation). Conventional catalysts used for the conversion CO and H2 (syngas) to ethanol typically give yields less than 20% with the balance resulting mostly in the formation of the thermodynamically favored products CH4 and CO2. New catalysts with compositions designed to kinetically favor the formation of ethanol and higher alcohols are needed. Electrodeposition of nanowires offers a means to …
Oxygen Enrichment Effect Of Mno2-Pt/C Compound Catalyst To The Cathode Of Pemfc, Hong-Feng Xu, Mao-Feng Zhang, Quan-Quan Gan, Cai-Sheng Huang
Oxygen Enrichment Effect Of Mno2-Pt/C Compound Catalyst To The Cathode Of Pemfc, Hong-Feng Xu, Mao-Feng Zhang, Quan-Quan Gan, Cai-Sheng Huang
Journal of Electrochemistry
TO study of the oxygen storage material of air cathode is crucial for increasing performance of proton exchange membrane fuel cell.Using the MnO2 as oxygen storage materials,a MnO2-Pt/C catalysts were prepared and is used to replace the conventional Pt/C in air cathode.The electrochemical performance of air cathode composed of MnO2 supported on Pt/C and the properties of fuel cell composed of MnO2-Pt/C were investigated by using the CV,galvanostatic dischange method and TEM.
The Electrodeposition Of Cerium/Copper Prox Catalysts On Metal Foam, James Matthew Faubion
The Electrodeposition Of Cerium/Copper Prox Catalysts On Metal Foam, James Matthew Faubion
LSU Master's Theses
A cerium/copper (Ce/Cu) preferred carbon monoxide (CO) oxidation (PROX) catalyst has been synthesized via electrodeposition onto a metal foam monolith. The catalyst was characterized using ICP, TPRS, TPR and SEM/EDS. Preliminary PROX TPRS evidence in a reaction mixture of 1% CO, 0.5% O2, 40% H2 (bal. Ar.) indicated that the highest activity was seen in a sequential deposition, in which Cu was deposited first. The highest CO oxidation activity was obtained when the Ce concentration in the second step was 0.1 M (resulting in a bulk wt% loading of 0.24 Ce:Cu). SEM/EDS analysis indicated that an increase in ceria loading …
Investigation On The Resistance To Electrochemical Oxidation Of Carbon Nanotubes With Various Diameters, Yu-Yan Shao, Ge-Ping Yin, Yun-Zhi Gao, Peng-Fei Shi
Investigation On The Resistance To Electrochemical Oxidation Of Carbon Nanotubes With Various Diameters, Yu-Yan Shao, Ge-Ping Yin, Yun-Zhi Gao, Peng-Fei Shi
Journal of Electrochemistry
The resistance to electrochemical oxidation of multi-wall carbon nanotubes(CNT) with various diameters is investigated by applying a fixed potential of 1.2 V(RHE) for 120 h in 0.5 mol L-1 H2SO4.The oxidation current of CNTs decreases with their diameters,but CNTs between 10~20 nm in diameter(D1020) shows the lowest oxidation current.XPS analysis shows that,after oxidation,the increase in surface oxygen for D1020 is the smallest,implying that the oxidation degree for D1020 is the lowest.The conclusion can be reached that CNTs between 10~20 nm in diameter are the most resistant to electrochemical oxidation.The difference in electrochemical stability of CNTs …
Oxygen Enrichment Effect Of Ceo2 To The Cathode Performance Of Proton Exchange Membrane Fuel Cell, Xiang-Li Hou, Hong-Feng Xu, Jian-Hua Dong, Xin Sun
Oxygen Enrichment Effect Of Ceo2 To The Cathode Performance Of Proton Exchange Membrane Fuel Cell, Xiang-Li Hou, Hong-Feng Xu, Jian-Hua Dong, Xin Sun
Journal of Electrochemistry
CeO2 was added to Pt/C catalyst in the cathode of PEMFC by both sol and impregnation methods.The samples were evaluated by TEM,cyclic voltammogram techniques and proton exchange membrane fuel cell performance test.The addition of CeO2 obviously improved the performance of PEMFC and represented a notable function of oxygen enrichment in the cathode side.But with the addition of CeO2,part of the catalyst surface was covered and led to the performance drop of the PEMFC.The best content of CeO2 is 1% when it is added by impregnation method and 3% when it is added by sol method.
High Performance Proton Exchange Membrane Fuel Cells, Jing-Rong Yu, Bao-Lian Yi, Ming Han, Xiao-Liang Cheng, Zhi-Gang Shao, Jing-Xin Zhang
High Performance Proton Exchange Membrane Fuel Cells, Jing-Rong Yu, Bao-Lian Yi, Ming Han, Xiao-Liang Cheng, Zhi-Gang Shao, Jing-Xin Zhang
Journal of Electrochemistry
Proton-exchange membrane fuel cells(PEMFC) using a perfluorosulfonic acid proton exchange membrane as an electrolyte can simplify water and electrolyte management. In this paper, the effects of thickness of PEM on the performance of PEMFC were studied. The Nafion-112 PEM and low platinum loading E-TEK electrode yielded very high power density, of the order of 0.95 W/cm2. The energy-conversion efficiency, the degree of platinum utilization and stability for PEMFC using Nafion 112 and E-TEK electrode were also investigated.