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Carbochemistry
About: Carbochemistry is a research topic. Over the lifetime, 1010 publications have been published within this topic receiving 16626 citations.
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TL;DR: In this article, the complex reactions taking place in the coal liquefaction process have been described in terms of a continuous reaction mixture with the molecular weight as a single state variable.
Abstract: The complex reactions taking place in the coal liquefaction process have been described in terms of a continuous reaction mixture with the molecular weight as a single state variable. A kinetic model, based on this approximation as well as on simple fission of molecules, has been developed. The resulting mathematical models, giving the amount of coal undissolved and the MW distribution of the species produced at a given time in a batch reactor, is amenable to the solution of an integrodifferential equation.
4 citations
TL;DR: In this article, the evolution of carboxylic acids, indanols and phenols and dibenzothiophenes at temperatures up to 300 °C has been studied by pyrolysis-mass spectrometry.
4 citations
TL;DR: In this paper, the application of a non-isothermal method of kinetic analysis to the study of coal hydrogenation is described, which provides a means of obtaining reaction rate data for the complex initial stages of the coal liquefaction process.
Abstract: The application of a non-isothermal method of kinetic analysis to the study of coal hydrogenation is described. Kinetic parameters obtained by this technique compare favourably with those obtained with a conventional approach. The non-isothermal method is convenient and provides a means of obtaining reaction rate data for the complex initial stages of the coal liquefaction process.
4 citations
01 May 1985
TL;DR: In this paper, the solvent diffusion effect on solvolysis of vitrinitic macerals in Alberta subbituminous coal has been studied, by performing petrographlc analyses of original coal and liquefaction residues.
Abstract: In a number of contributions to coal liquefaction, gas–liquid mass transfer limitation has been referred by neglecting mass transfer limitation of solvent Into solid coal. Reported apparent activation energies of coal liquefaction reactions are In the range of 10–20 kCal/g–mole, which are too low for thermal reactions, Imply that diffusion Is the rate controlling step. In this study, the solvent diffusion effect on solvolysis of vitrinitic macerals In Alberta subbituminous coal has been studied, by performing petrographlc analyses of original coal and liquefaction residues. Quasi–steady state and transient coal–solvent diffusion-chemical reaction models are developed to Interpret the experimental data. Results indicate that solvent diffusion into the reactive maceral most likely be a rate limiting step In coal liquefaction.
4 citations
TL;DR: In this article, the authors investigated the hydroliquefaction of French Freyming coal in a batch reactor between 350 ° and 430 °C, using nonporous SnO 2 aerosol with a low particle size (15 nm) as a catalyst precursor, or presulphided tin oxide or commercial metallic tin.
4 citations