Underground coal gasification

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UCG is the new source of energy...

Underground Coal Gasification (UCG) is a gasification process applied to non-mined coal seams, using injection and production wells drilled from the surface, which enables the coal to be converted in situ into product gas. The process has produced commercial quantities of gas for both chemical processes and power generation.

The UCG process developed, refined and practiced by Ergo Energy is called the Energy UCG Technology or UCG Technology. It differs from generic UCG in its higher energy efficiency - hence lower energy dissipation into the environment.
During the UCG process, much as in conventional gasification methods, an oxidant reacts with coal of the underground coal seams, and part of released sensible heat is used in coal drying, pyrolysis and the endothermic reactions that reduce the combustion products. The resulting mixture is UCG gas. The gas composition depends on the coal geology as well as the process parameters. It can be produced using a variety of oxidants, including air and oxygen-rich gaseous blends.

Process parameters - such as operating pressure, outlet temperature and flow - are governed by the coal and rock properties that vary with time and location. Information on the process conditions must be constantly monitored and updated as the underground gasifier develops. Process parameters need to be adjusted accordingly to accommodate the ever-varying conditions of gasification.

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