Investigation of Underground Coal Gasification in Laboratory Conditions: A Review of Recent Research

The underground coal gasification (UCG) technology converts into product gas and provides the option of environmentally economically attractive mining. Obtained syngas can be used for heating, electricity, or chemical production. Numerous laboratory trials have been performed in academic industrial fields. Lab-scale tests provide insight processes involved with UCG. Many UCG on ex situ reactors, where different techniques, effect agents, their flow rates, pressures, various control mechanisms to improve efficiency production investigated. This paper an overview recent research a lab scale. study focuses variables optimization, agents operating pressure, it discusses results from lignites hard coals, possibilities steam gasification, hydrogen, methane-oriented approaches temperature modeling, changes properties during environmental risks review results, possibility knowledge transfer operation.