Thermochemical conversion of fuels into hydrogen-containing gas using recuperative heat of internal combustion engines

Abstract

The problem of the thermochemical recuperation of heat from the exhaust gases of internal com� bustion engines (ICEs) as a method of increasing of the efficiency of fuels has been considered. The thermo� dynamic analysis of thermochemical recuperation conditions was performed, and maximum efficiency con� ditions were determined. Catalysts for the steam conversion of oxygencontaining fuels into syngas were developed, and the Co-Mn/Al2O3 catalyst was shown to be the most promising. The model of a thermo� chemical heat recuperation system was developed and manufactured, and its bench tests in the conversion of alcohols were performed using the simulated exhaust gases from a heating device. Mathematical models for calculating units of the heat recuperation system were developed. A recuperation system was manufactured and tested in the ICEfree and ICEintegrated variants. Based on the test results, the equivalent fuel con� sumption characteristics of a recuperative ICE was revealed to decrease by 11-22% depending on its load with a decrease in the concentration of hazardous emissions by 8-12 times for CO, 2-3.5 times for CH, and 18-25 times for NO x .