Coal Gasification

Integrated Gasification Combined Cycle, or IGCC, is a technology that turns coal into gas - synthesis gas (syngas). It then removes impurities from the coal gas before it is combusted. This results in lower emissions of sulfur dioxide, particulates and mercury. It also results in improved efficiency compared to conventional pulverized coal


Below is a schematic flow diagram of an IGCC plant:


Coal Gasification 

Block diagram of IGCC power plant, which utilizes the Heat Recovery Steam Generator

The gasification process can produce syngas from high-sulfur coal, heavy petroleum residues and biomass.

IGCC Sulfur Recovery
Depending on the amount of sulfur in the coal, MECS Spent Acid Recovery or Wet Gas Sulphuric Acid processes can be used to produce sulfuric acid for sale.

IGCC Emissions Reductions:
MECS DynaWave is selected for IGCC Emissions Reduction applications due to the flexibility of its wet gas scrubbing technology.  DynaWave can be designed to handle start-up, shutdown, and normal inlet gas variations such as flow rate and sulfur content.

Advantages of the DynaWave in IGCC SO2 removal applications are:


  • excellent turndown,
  • ability to handle very high SO2 inlet loading,
  • high on-line availability
  • small footprint


IGCC Energy Recovery
IGCC affords many opportunities for energy savings.  MECS Thermo-Z gas to gas heat exchangers used as combustion air preheaters provide an excellent means of recovering heat that would otherwise be lost to ambient surroundings.

Integrated Gasification Combined Cycle. (2009, April 6). In Wikipedia, The Free Encyclopedia. Retrieved  April 23, 2009, from 


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