An Investigation of the Applied Chemistry of the Reactions of Coal and Nitrogen Dioxide with a Particular Emphasis on Oxidative Desulfurization

Chemical Engineering;Chemistry

Kralik, James Gregory ; Corcoran, William Harrison

University:California Institute of Technology

Department:Chemistry and Chemical Engineering

关键词: Chemical Engineering;    Chemistry;   

Others  :  https://thesis.library.caltech.edu/4642/1/Krallik_jg_1982.pdf

美国|英语

来源: Caltech THESIS

【 摘 要 】

The physical and chemical changes in coal resulting from mild oxidation at ambient conditions with NO₂ were studied. Various liquid phases were used as transport media for the NO₂. Subsequent to the oxidation, the coal was subjected to a wash with aqueous Na₂CO₃ at ambient conditions. Particular attention was given to the desulfurization of the coal. A mathematical model of the reactions between NO2 and coal at temperatures less than 100°C and a pressure of 1 atm was developed from the experimental data. This model included the simultaneous diffusion and reaction of NO₂ in the solid-coal matrix and considered pore diffusion not to be controlling. The elemental composition and the energy content, after processing were extensively examined. The effect of the NO₂ treatment on the pore structure was established.