1989 Volume 15 Issue 2 Pages 372-380
As a step in the research on a high-temperature desulfurization cycle of low-calorie gasified gas by means of iron oxide sorption, a fundamental study on the regeneration of iron sulfide with dry air was carried out by use of a packed-bed reactor.
The iron sulfide packed in the bed could be converted to fresh iron oxide without any drop in the reactivity or the capacity as a sorbent, and the reaction product gas, sulfur dioxide, was released from the reactor at the stoichiometric concentration. It was recognized that the reaction time was approximately inversely proportional to the mass flow rate of air at the bed inlet. By decreasing the mass flow rate of air at the bed inlet, the temperature rise of the bed could be suppressed as low as possible, regardless of the large quantity of exothermic heat of oxidization of iron sulfide.
The experimental trends mentioned above could be explained fairly well by the theoretical model derived under various assumptions.
