China and Australia sign agreement on Beijing post combustion capture pilot plant.

Australia’s CSIRO and China’s Thermal Power Research Institute (TPRI), will combine to install, commission and operate a post combustion capture (PCC) pilot plant at the Huaneng Beijing Co-Generation Power Plant as part of CSIRO’s research program. Tdhe agreement was signed last week.

The process being employed uses a liquid to capture carbon dioxide from flue gases released from power stations. It is expected that carbon dioxide emissions could be reduced by more than 85 percent.

The CSIRO explains how the PCC process works:

“In a traditional power station, coal is pulverised and burnt to produce high pressure steam. The steam is expanded in turbines, which turn generators to produce electricity. Flue gases leaving the boiler are filtered to remove dust and then vented to the atmosphere. These gases contain around 10 to 15 per cent CO2.

PCC enables the capture of most of the CO2 from power stations. Flue gas is cooled and cleaned then fed into the bottom section of a CO2 absorber where it passes through an absorbing solution, containing a chemical to capture the CO2. The absorber captures more than 85 per cent of the CO2 and the clean flue gas, virtually 100 per cent nitrogen, is released into the atmosphere.

The CO2 is then removed from the absorbing solution by steam heating, so the absorber can be reused. The CO2 is compressed and cooled to form a liquid. Using the technique of geosequestration this liquid can then be sequestered, or permanently buried, in:

  • deep saline aquifers
  • depleted gas or oil reservoirs
  • deep unmineable coal seams and adjacent strata
  • or other deep geological formations.”

The CSIRO reports that the pilot plant is designed to capture 3,000 tonnes per annum of carbon dioxide from the power station and begins the process of adapting this technology to evaluate its effectiveness in Chinese conditions.

Director of CSIRO’s Energy Transformed National Research Flagship, Dr John Wright, said that the project will focus on assessing the performance of an amine-based PCC pilot plant under Chinese conditions. It will allow PCC technology to be progressed in the Chinese energy sector which will have a much greater impact than operating in Australia alone.

“The Chinese partners are aiming for the Beijing pilot plant to be up and running before August this year,” said Dr Wright.

For those who may be interested, an interesting Pdf on post combustion capture with amine solvents can be downloaded from the link included here.
Another site with details on carbon capture can be accessed at the link here.

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~ by abstraktbiblos on Thursday, 13 March, 2008.

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