Liquid CO2 Slurry (LCO2) for Feeding Low Rank Coal (LRC) Gasifiers


Process flow diagram of a gasification plant with coal-liquid CO2 slurry feed
Process flow diagram of a gasification plant with coal-liquid CO2 slurry feed
Electric Power Research Institute, Inc.
Website:  Electric Power Research Institute
Award Number:  FE0007977
Project Duration:  10/01/2011 – 09/30/2013
Total Award Value:  $1,023,810
DOE Share:  $785,781
Performer Share:  $238,028
Technology Area:  Gasification Systems
Key Technology: 
Location:  Palo Alto, California

Project Description

This project will exploit the availability of CO2 in a gasification power island for the benefit of IGCC-CCS integrated plants. EPRI will leverage the findings of laboratory tests to support the development and evaluation of mechanical engineering designs of LRC/LCO2 slurry preparation systems, which in turn will be used to develop higher resolution IGCC plant performance and cost models. The project aims to validate that LCO2 can achieve higher solid loading than water slurry, study the design criteria for a LCO2-coal slurry preparation/mixing system that is superior to conventional feed systems, and demonstrate potential plant thermal efficiency improvement over a water-coal slurry-based feed system.

Project Benefits

There is increased interest in carbon capture and storage (CCS) for future coal-based power plants, and in a CCS integrated gasification plant, relatively pure, high pressure CO2 stream(s) will be available within the power plant. Electric Power Research Institute (EPRI) aims to help reduce the cost and improve the efficiency of integrated gasification combined cycle (IGCC) with CCS by using a portion of the high purity CO2 product stream as the carrier fluid to feed low rank coal (LRC) into the gasifier.

EPRI proposes to confirm the potential advantages of LRC/liquid carbon dioxide (LCO2) slurries by:

The outcome of the design effort will help lead the way to integrating LRC/LCO2 slurry feed systems into future systems for prototype testing at an IGCC with CCS power plant. The successful completion of the project will also lead to:

Contact Information

Federal Project Manager 
Arun Bose:
Technology Manager 
Jenny Tennant:
Principal Investigator 
Jose R. Marasigan: jmarasigan@epri.coom

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