The Engineer

Team develops improved carbon capture technique

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An environmentally friendly method of capturing carbon dioxide from power stations has been developed by a team of researchers at the University of Melbourne.

’The capture process is the most expensive part of carbon capture and storage [CCS] so reducing costs in capture can make a major difference to the overall cost of CCS. This process can reduce those costs by 15 to 20 per cent, potentially saving an operator millions of dollars a year,’ said Dr Peter Cook, chief executive of the Australian Cooperative Research Centre for Greenhouse Gas Technologies (CO2CRC).

The system, developed by the CO2CRC solvent team at the university, uses potassium carbonate - an environmentally benign compound similar to baking soda - to capture CO2 from large industrial sources for storage.

’Apart from the energy-saving potential of this technology, which is considerable, the solvent used is non-volatile and oxygen tolerant,’ said Cook.

Another important benefit is that the system is able to deal with SOx and NOx, two of the by-products of combustion, converting them to solids that can be used in fertiliser manufacture.

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