Abstract
A model of the process of catalytic coal hydrogenation in a cascade of bubble column reactors is developed. It is based upon the combination of a non-isothermal kinetic model and a model of a tube reactor with axial backmixing. A coupled set of differential equations for the mass proportions of the components (coal, CO x gases and reaction water, asphaltenes, oil and hydrocarbon gases) and a differential equation to calculate the temperature were derived. The heats of reaction and solution, both coupled with hydrogen consumption, and the heat loss over the wall are taken into account. It was assumed for calculation of the temperature that the conditions at every site of cold gas injection are the same as at the entrance into the bubble column reactor. Calculations are done to determine the parametric sensibility of the model. Calculations for the conditions of the former Leuna coal hydrogenation plant as well as for constant reactor temperature will be reported in the accompanying paper.
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