Thermodynamic Characteristics of Carbon-supported 2-Propanol Dehydrogenation Catalyst in Liquid-film State

Abstract

A catalyst-assisted chemical heat pump system, consisting of a reversible hydrogenation couple and distillation, is able to provide 200℃ heat using a 90℃ heat source and a 30℃ coolant. In order to enhance the thermal efficiency of this system, conversion of low-quality heat into chemical energy was accomplished efficiently under boiling conditions by use of dehydrogenation catalysts in liquid-film states, where the catalyst/solution amount ratios were large enough for attaching the catalyst layer to the reactor wall directly. Under boiling and refluxing conditions, superheated catalysts gave an equilibrium-exceeding conversion (29.6 %>11.1 % at 90℃) at a high enthalpy efficiency (34.4 %).