Abstract
This paper presents the results of a kinetic study of the thermal liquefaction of brown coal from the Black Sea mine in Bulgaria. The experiments were carried out in a laboratory ‘tubing bomb’ reactor under isothermal conditions within the 350 to 450 °C temperature range and a reaction time range of 5 to 30 min, in tetralin. A kinetic model is obtained that adequately describes the distributions of preasphaltenes, asphaltenes, oils and gases in the product. The pseudo first-order rate constants for each of the mechanistic steps have been estimated by non-linear regression.
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