COAL-GASIFICATION STUDIES .2. REDUCTION IN THE PRESENCE OF I-2 WITH H-2, AND H2O+ METAL, AT PRESSURES UP TO 3500 PSI AND TEMPERATURES OF 600-DEGREES-C IN ALL QUARTZ REACTORS

An experimental method is described which allows coal reduction experiments to be made in all quartz reactors at temperatures up to 600°C and pressures of 3500 p.s.i. The method is applied to the study of the reactions: Coal + H2O + I2 + Metal(Metal = Fe, Cr, Mo, Ni, Sn, Zn); H2O + I2 + Metal, and Coal + H2 + I2. It is shown that iodine is a catalyst for the water + metal hydrogen-producing reactions, and that the composite systems with coal are capable with Cr and Zn of completely reducing coal to gaseous hydrocarbons at 600°C. Thermodynamic and kinetic data are used to show that iodine functions as a coal reduction catalyst in the presence of molecular hydrogen at 600°C by permitting a finite steady state hydrogen atom concentration to be attained in the system. © 1979.