Article: A shot of lime for cleaner burning. (pressure-hydrated lime to reduce sulfur emissions)

Limestone injected into a coal-burning furnace acts like a chemical "sponge" that absorbs sulfur impurities before they escape into the atmosphere. Normally, this method requires large quantities of limestone. However, recent U.S. Department of eneryg tests show that if a special form of limestone is used, only one-third as much limestone is needed to reduce sulfur emissions.

This material, called ...

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