Lignite luminescence
in a move to reduce emissions from coal-fired plants, India is installing a coal gasification plant. It will be the first commercial-scale coal gasification project in the world to use lignite for producing electricity and steam.
Work is underway on an innovative 60- mw coal-fired integrated gasification combined cycle (igcc) co-generation plant in Madras. The plant being developed by ibil Energy Systems ( ies ) will supply power and steam to a private cement plant with a capacity of 2.6 million tonnes per year, being built by Sanghi Industries. ies will own and operate the plant for the first 10 years, after which the ownership will be transferred to Sanghi Cement.
The ies -Sanghi project will provide substantial environmental benefits. The introduction of igcc technology in India is a critical step in minimising the country's emissions of greenhouse gases from coal. igcc is 20-40 per cent more efficient than conventional coal-fired plant. When used for co-generation, as in the ies -Sanghi case, igcc energy efficiencies can increase up to 80 per cent and reduce co 2 emissions by almost half. igcc technology also virtually eliminates particulate emissions and reduces sulphur dioxide and no x emissions.
The plant will have a peak power output of 52.5 mw , supplying an average of 30 mw to the cement plant. Surplus power will be sold to the grid or third parties. The project will also provide 40 tonnes per hour of steam for a captive desalination plant which will provide processed water to the cement plant and hot water for domestic use to the local community. The plant will initially use naphtha as fuel while the gasification island is being completed, after which, it will be gradually shifted over to burning lignite.
One of the major attractions of the project is its replicability