Steady State Thermal Analysis of a Reactor for Removal of Sulfur from Coal by Oxygen/Water Selective Oxidation

摘要

A steady state energy balance is performed around a reactor for removing sulfur from coal by oxygen/water selective oxidation, or oxydesulfurization. Effects of reactor temperature, pressure, slurry feed concentration, and oxygen content of the feed gas on the thermal balance are investigated. Adiabatic operation of a commercial reactor is possible within the preferred range of operating conditions for at least one version of oxydesulfurization. Reactor temperature can be controlled in adiabatic operation of manipulation of slurry feed concentration, total pressure, and oxygen content of the feed gas. There are a number of advantages to operating an oxydesulfurization reactor adiabatically. Waste heat is used in the most effective manner possible at its highest temperature, and to generate power. Adiabatic operation minimizes heat exchanger cost, since exchangers are used only as necessary to preheat the feed. Reactor temperature control by regulation of feed oxygen concentration and total pressure combines a fast response time with safety. Fine temperature control could be provided by variation of feed oxygen concentration and total pressure. (ERA citation 05:000001)