Chemical Engineering Commons^™

Thermochemical Properties, Bond Energies And Internal Rotor Potentials In Methyl Ethyl Sulfide And Oxygenated Sulfur Hydrocarbons Intermediates For Modeling Its Combustion And Atmospheric Chemistry, Guanghui Song

Theses

Small (1 to 4 carbon) hydrocarbon sulfides and thiols are formed in the biosphere by microorganisms and subsequently emitted into the lithosphere, hydrosphere and atmosphere. In the atmosphere they are oxidized by photochemical and radical reactions to intermediate hydrocarbon and to sulfur oxides. The oxides of these sulfur compounds and the intermediates from the oxidation process are known to form aerosols that can counteract the global warming green house effect. Recent studies also suggest that some aerosols can also contribute to global warming. Sulfur oxides are also major contributors to acid rain as the results of the atmospheric chemistry oxidation …

Thermodynamics Of Dna Hybridization On Surfaces, Terry J. Schmitt, Thomas A. Knotts Iv

Faculty Publications

Hybridization of single-stranded DNA (ssDNA) targets to surface-tethered ssDNA probes was simulated using an advanced coarse-grain model to identify key factors that influence the accuracy of DNA microarrays. Comparing behavior in the bulk and on the surface showed, contrary to previous assumptions, that hybridization on surfaces is more thermodynamically favorable than in the bulk. In addition, the effects of stretching or compressing the probe strand were investigated as a model system to test the hypothesis that improving surface hybridization will improve microarray performance. The results in this regard indicate that selectivity can be increased by reducing overall sensitivity by a …

Study Of The Heating And Ignition Of Metal Powder By Electrostatic Discharge, Ervin Beloni

Dissertations

The objective of this work was to understand the processes that lead to ESD stimulated ignition events in metal powders. Several metals were studied: Mg, Al, and Ti. A commercially available ESD test device was adapted for the present experiments. The ESD current and voltage were measured using inductance coils; the data were used to determine the electric circuit impedance, and energy transferred to the powder. A mode of the powder ignition (individual particles vs. dust cloud), ignition delays, burn times, and velocities of ignited and ejected particles were determined from optical measurements.

It was determined that the ESD energy …

Preparation And Electrocatalytic Activity Of The Pt/Wc/Tio2 Composites, Chun-An Ma, Bin Yu, Mei-Qin Shi, Xiao-Ling Lang

Journal of Electrochemistry

TiO₂ was used as the support for preparation of Pt/WC/TiO₂ composite catalyst. The composites were characterized by XRD, SEM and TEM methods. The electrocatalytical activity of Pt/WC/TiO₂ composite for oxidation of methanol was investigated by cyclic voltammetry. Pt/WC/TiO₂ exhibited higher activity compared with that of Pt/TiO₂ and Pt/WC composite catalysts. Based on this we discussed the effects of crystal phases of TiO₂ on the electrocatalytical activity of Pt/WC/TiO₂ composite catalyst.

Electrochemical Capacitive Performance Of Mesoporous Carbon Based Co-Ni Oxides, Zhen-Sheng Yang, Ling-Bin Kong, Li Deng, Yong-Chun Luo, Long Kang

Journal of Electrochemistry

By using defects on the surface of CMK-3 served as nucleation center, Co_0.25Ni_0.75 oxide/C composite was successfully prepared through a simple chemical co-precipitation method. Characterization was carried by using X-ray diffraction, BET and scanning electron microscopy. Results showed that a perfect mesoporous network of interconnected nanoflakes was obtained for Co_0.25Ni_0.75 oxide/C composite and, this material has a less crystallization, interconnected nanoflakes network structure and a narrow mesoporous distribution at about 3~4 nm. The highly dispersed and loosely packed Co_0.25Ni_0.75 oxide/C composite possessed good electrochemical accessibility and fast diffusion rate of OH …

Synthesis And Catalytic Property Of Flaked Spindle-Like Cuo Nanocrystals, Jian-Feng Fan, Li-Qing Li, Yu-Feng Huang, Lou-Zhen Fan

Journal of Electrochemistry

A simple and efficient electrochemical route was developed for the synthesis of flaked spindle-like CuO nanocrystals using aqueous electrolyte and Cu sacrificial anode (graphite as the cathode) in an undivided cell at a constant potential mode under room temperature. The morphologies, structure and component of CuO nanocrystals obtained were characterized by SEM, XRD, respectively. Flaked spindle-like CuO nanocrystals were successfully used to modify a GC electrode to detect H₂O₂ with cyclic voltammetry (CV) and amperometric (AC).The results showed that products were pure monoclinic CuO nanocrystals. The linear range for the determination of hydrogen peroxide is from 1.0 …

Study On Direct Electro-Oxidation Of Anisaldehyde, Lin-Lin Wu, Ying-Hong Zhu, Shan-Shan Li, Hong-Yan Zeng, Chun-An Ma

Journal of Electrochemistry

The oxidation of anisole on Pt electrode was investigated by cyclic voltammery and constant potential electrolysis. The influence of scan rates, substrate concentration, supporting electrolytes and solvent were considered . The results show that the electro-oxidation process of anisole was irreversible. In this research the sulfuric acid was the best supporting electrolytes and acetone was the best solvent, and the process was controlled by diffusion . The product of constant potential electrolysis was charactered by GC-MS .The results show that the main products was anisaldehyde, and the selectivity was up to 66.5% when using acetone as solvent.

Dft Study Of Co2 Reduction To Hydrocarbons On Cu Surfaces, Li-Hui Ou, Sheng-Li Chen

Journal of Electrochemistry

CO₂ reduction on Cu(111) single crystal surfaces was studied using DFT calculations on the reaction energies and the minimum energy paths. The results indicated that the possible reaction paths for CO₂ reduction on Cu(111) surface are CO₂(g) + H* → COOH* → (CO +OH)*, (CO + H)* → CHO*, CHO + H → CH₂O* → (CH_2⁺O)*, CH₂* + 2H* → CH₄ or 2CH₂* → C₂H₄. On Cu(111) surface, the reaction rate is controlled by steps of CH₂O* → (CH_{2 …}

Comparison Of Catalytic Performance On Different Materials Supported Pd Catalysts For Formic Acid Oxidation, Su-Dong Yang, Yan-Yu Liang, Zhu-Liang Wen, Qi-Jun Song, Xiao-Gang Zhang

Journal of Electrochemistry

Graphite oxide (GO) was prepared from by Hummers method. Then the graphene nanosheets supporting Pd catalysts were prepared by a single-step chemical reduction method. The electrocatalytic performance for formic acid oxidation of the prepared Pd/graphene composite was studied as an electrode material in comparison with the composite catalysts based on the other carbons (MWCNTs, SWCNTs, and Vulcan XC-72 carbon black). X-ray diffraction (XRD) and transmission electron microscopy (TEM) measurements indicated that the Pd nanoparticles were well dispersed on the surface of the graphene nanosheets with a small particle size. The electrocatalytic oxidation of formic acid was studied by electrochemically active …

Anode Electrodeposition Of Ti/Mno2 Electrode And Electrocatalytic Oxidization Properties Of Phenol Degradation, Ye Chen, Wen-Li Zhao, Qing Wen

Journal of Electrochemistry

Ti-base manganese dioxide (Ti/MnO₂) electrode was prepared by anodically electrodeposition technology in this paper. The structure of the electrode, the microstructure of the electrode surface and the element composition of the electrode were analyzed by XRD, SEM and EDS. The preparation process parameters of the electrode were studied in detail with the help of the V~logi curve and phenol degradation curve. The Ti/MnO₂ electrode was anodically electrodeposited at current density 4mA•cm^-2, the Mn^{2 +} ions concentration 0.5mol•L^-1 and temperature70℃. The V~logi curve and phenol degradation curve were used to evaluate electrocatalytic oxidization properties …

The Yin And Yang Actions Of North American Ginseng Root In Modulating The Immune Function Of Macrophages, Chike Godwin Azike, Paul Abrahams Charpentier, Jirui Hou, Hua Pei, Edmund Man King Lui

Physiology and Pharmacology Publications

BACKGROUND: Immuno-modulatory effects of ginseng, including both immuno-stimulatory and immuno-suppressive effects, have been widely reported. This study aims to determine whether the paradoxical immuno-modulatory effect is related to unique phytochemical profiles of different North American (NA) ginseng, namely aqueous (AQ) and alcoholic (ALC) extracts.

METHODS: AQ and ALC extracts were prepared and their immuno-bioactivity were studied in vitro in murine macrophages (Raw 264.7) through measuring the direct stimulatory production of pro-inflammatory mediator and cytokines as well as the suppression of lipopolysaccharide (LPS)-stimulatory response by the two extracts. Gel permeation chromatography was used to fractionate and isolate phytochemicals for characterization of …

Intensification Of Bioethanol Production Simultaneous Saccharification And Fermentation In The Oscillatory Baffled Reactor (Obr), Joseph Ikwebe, Adam P. Harvey

Bioenergy III: Present and New Perspectives on Biorefineries

No abstract provided.

Application Of Batch Oscillatory Baffled Bioreactor To Produce Biobutanol Using Clostridium Gbl 1082, Nasratun Masngut, Adam P. Harvey

Bioenergy III: Present and New Perspectives on Biorefineries

No abstract provided.

Improved Xylose Fermentation In Zymomonas Mobilis Through Metabolic Engineering And Adaptation, Rachel Chen

Bioenergy III: Present and New Perspectives on Biorefineries

No abstract provided.

Engineering An E. Coli Binary Culture For Consolidated Production Of Biofuel From Hemicelluloses, Rachel Chen

Bioenergy III: Present and New Perspectives on Biorefineries

No abstract provided.

Fermentative Upgrading Of Biomass Pyrolysis Byproduct, Karen Schwab, Martin Siemann-Herzberg, Lars Rehmann

Bioenergy III: Present and New Perspectives on Biorefineries

No abstract provided.

Butanol Extractive Fermentation To Simultaneously Produce Properties Improved Bio-Diesel And Butanol In A Water And Energy-Saving Operation Way, Zhongping Shi

Bioenergy III: Present and New Perspectives on Biorefineries

No abstract provided.

Catalytic Cracking Of Biodiesel: Using The Fcc Process To Convert Fame Into Oxygen-Free Gasoline, Alexander Weinert

Bioenergy III: Present and New Perspectives on Biorefineries

No abstract provided.

Synthesis, Characterization And Evaluation Of Sulphated Zirconias For Biodiesel Production By Triglyceride Cracking, Elizabeth Eterigho, J.G.M. Lee, A.P. Harvey

Bioenergy III: Present and New Perspectives on Biorefineries

No abstract provided.

Alternative Feedstock For Fluid Catalytic Cracking: Conversion Of Waste Cooking Oil To Gasoline And Gaseous Olefins, Peter Bielansky

Bioenergy III: Present and New Perspectives on Biorefineries

No abstract provided.

Catalytic Pyrolysis Of Biomass: An Effective Method For The Fuels Obtaining, Esther Sulman, Yu Kosivtsov, M. Sulman, V. Alfyorov, Yu. Lugovoy, V. Molchanov, I. Tyamina, O. Misnikov, A. Afanasjev, N. Kumar, D. Murzin

Bioenergy III: Present and New Perspectives on Biorefineries

No abstract provided.

An Overview On The Pulp And Papermaking Process From Agroforestry Residues: A Biorefinery Approach, F. Bimbela, F. Marin, J. Abrego, I. Egües, J. Labidi, A. Gonzalo

Bioenergy III: Present and New Perspectives on Biorefineries

No abstract provided.

Effect Of Catalytic Site Position Of Carbon Nanotubes Supported Cobalt Catalysts In Fischer-Tropsch Synthesis, E. Epelde, V.R. Surisetty, M. Trepanier, A. K. Dalai

Bioenergy III: Present and New Perspectives on Biorefineries

No abstract provided.

Propylene Production From 1-Butene And Ethylene Catalytic Cracking: Study Of The Performance Of Hzsm-5 Zeolites And Silicoaluminophosphates Sapo-34 And Sapo-18, E. Epelde, A.G. Gayubo, M. Gamero, A.T. Aguayo, J. Bilbao

Bioenergy III: Present and New Perspectives on Biorefineries

No abstract provided.

The Influence Of Various Variables On In Situ Transesterification Of J. Curcas, Farizul Kasim, Adama Harvey

Bioenergy III: Present and New Perspectives on Biorefineries

No abstract provided.

Study Of The Desulphuration Power Of The Char From Meat And Bone Meal Pyrolysis, E. Cascarosa, M.C. Ortiz De Zarate, G. Gea, J.L. Sanchez, J. Arauzo

Bioenergy III: Present and New Perspectives on Biorefineries

No abstract provided.

Hydrogen Production By Aqueous-Phase Reforming Of Glycerol From The Biodiesel Manufacturing, Jesús Arauzo, A. Valiente, M. Oliva, J. Ruiz, L. Garcia

Bioenergy III: Present and New Perspectives on Biorefineries

No abstract provided.

Rubisco Recovery From Alfalfa Juice By Ion-Exchange Chromatography In Expanded Bed, S. Kerfai, A. Fernandez, S. Mathe, S. Alfenore

Bioenergy III: Present and New Perspectives on Biorefineries

No abstract provided.

Advanced Biofuels And Added Value Products From Residual Quasi-Homogeneous Biomass: From Ethanol To Drop-In Fuels, Jean Michel Lavoie

Bioenergy III: Present and New Perspectives on Biorefineries

No abstract provided.

Development Of A Novel Vibrating Reactor For Testing Bio-Oil Gasification Catalysts, Mohammad Latifi, Lorenzo Ferrante, Franco Berruti, Cedric Briens

Bioenergy III: Present and New Perspectives on Biorefineries

No abstract provided.