COAL PROCESSING FOR FUEL CELL APPLICATION TASK REPORT FOR PERIOD JULY 1 - OCTOBER 31, 1978 Task I The Reaction of Char with CO2, and H2O in Entrained Flow Gasifiers

摘要

This report attempts to verify these observations by using data gathered from controlled laboratory experiments to evaluate the degree to which hetero¬geneous chemical reactions other than oxidation could play a role in entrained flow gasifiers. Because of the difficulty of obtaining diagnostic information on the details of the phenomena taking place inside the high temperature sec¬tion of entrained flow gasifiers, these data are on the fundamental reaction of CO2 and H2O with solid carbon and have been incorporated into a model of the reaction of porous char particles. The char particle reaction model includes a description of the porous structure of chars, the variation of the char structure with reaction, and accounts for such limiting processes as external boundary layer diffusion, Knudsen and continuum diffusion in the pores, and various chemical reactions.