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Full-Text Articles in Physical Sciences and Mathematics
Catalytic Fluorination Of Dichloromethane With Hydrofluoric Acid, Michael O. Myers
Catalytic Fluorination Of Dichloromethane With Hydrofluoric Acid, Michael O. Myers
Retrospective Theses and Dissertations
The catalytic, vapor-phase fluorination of dichloromethane to chlorofluoromethane with 38% hydrofluoric acid was investigated as a model system for possible direct utilization of hydrofluoric acid in the production of fluorocarbons and chlorofluorocarbons. Catalysts consisting of Cr or Ni supported on alumina and Ni, Cr, Ag, Co, La, Sn, Hg(I), Hg(II), Cu, Fe, Ru, Zn, Na, or Ca supported on activated charcoal were utilized at various reaction temperatures and reactor residence times. Alumina-supported catalysts were found to have low activities for fluorination in comparison to catalysts utilizing anhydrous HF reported in the patent literature. The low activities were attributed to low …
The Liquid Phase Oxidation Of 1,3-Pentadiene, Carl B. Reaves
The Liquid Phase Oxidation Of 1,3-Pentadiene, Carl B. Reaves
Retrospective Theses and Dissertations
The liquid phase autoxidation of 1,3-pentadiene to 2,4-pentadienoic acid utilizing gaseous oxygen at atmospheric pressure was investigated as a possible route for direct utilization of piperylene obtained during the cracking of naptha to ethylene. Catalyst system consisting of cobalt, manganese, and iron salts promoted by sodium, potassium and hydrogen bromides, were used under a variety of condition of catalyst concentration, temperature, oxygen flow and piperylene purity. Under all conditions studied, a large number of oxidation products were formed. Maximum yields of 2,4-pentadienoic acid were obtained using a cobalt acetate bromide catalyst at 85°C.
The Liquid Phase Conversion Of Carbon Dioxide To Hydrocarbons Over Ruthenium Catalyst Systems, Mohammad M. Akbarnejad
The Liquid Phase Conversion Of Carbon Dioxide To Hydrocarbons Over Ruthenium Catalyst Systems, Mohammad M. Akbarnejad
Retrospective Theses and Dissertations
The purpose of this research project was to evaluate the feasibility of producing hydrocarbons by liquid phase hydrogenation of carbon dioxide. Initial studies dealt with the evaluation of ruthenium (III) chloride over a wide range of reaction conditions. High conversions were observed and were found to vary with catalyst concentration, temperature and time. Conversion of carbon dioxide reached 73% after twenty-four hours at a catalyst concentration of 0.75g/mole of CO2 feed. The hydrogen to carbon dioxide ratio was found to have a significant effect on product distribution and amount of methane produced. For example, low ratios of H2/CO2 gave large …
A Model For Solid Waste Collection Costs, Bruce Anderson
A Model For Solid Waste Collection Costs, Bruce Anderson
Retrospective Theses and Dissertations
No abstract provided.
Quantitative Analysis Of Thin Films By Dc Arc Optical Emission Spectroscopy, Arnold W. Hogrefe
Quantitative Analysis Of Thin Films By Dc Arc Optical Emission Spectroscopy, Arnold W. Hogrefe
Retrospective Theses and Dissertations
The use of DC arc optical emission spectroscopy (OES) for quantitative analysis of thin films deposited on graphite electrodes was investigated as a process control tool. Three binary systems were evaluated: nickel-chromium, phosphorous-silicon, and silicon-aluminum. Sampling by direct deposition onto graphite electrodes placed in the deposition chamber with product runs proved to be a rapid, representative, and non-disruptive technique. Standard electrodes were prepared for each system either by evaporation of solutions of known concentration onto the tips of electrodes or by weighing out powdered standards of the appropriate concentrations. Standard curves were then prepared by burning multiple sets of standard …