India has enough limestone to help coal-based power plants meet emission norms: CSE

India has enough reserves of limestone to enable thermal power plants to install flue gas desulphurization (FGD) systems by 2022 in order to meet the new emission norms for the sector, says a new report released online on Tuesday by Centre for Science and Environment (CSE).

The latest report refutes the contention of power plants, which have been delaying implementation of the norms by raising concerns about availability of limestone and use of its byproduct, FGD gypsum.

The coal-based thermal power plants have to install FGD systems to meet country’ new emission norms by 2022.

Limestone is a key raw material in most FGD systems for controlling sulphur dioxide (SO2) emissions. The report titled “Flue Gas Desulphurization- limestone availability and gypsum use”, is an attempt to examine the issue of availability of limestone for FGD.

CSE Director General Sunita Narain says “many thermal power companies have been raising various concerns regarding FGD installation; one of these is about the availability of limestone, and the use or disposal of FGD Gypsum, a by-product of the FGD operation. This report attempts to address both these key issues.”

“India is the largest emitter of SO2 in the world, contributing more than 15 per cent of global anthropogenic emissions. FGD systems in thermal power plants can reduce SO2 emissions from these”, she says.

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