University of Kentucky CAER Home


Interactions in Emissions Control for Coal-Fired Plants

AUTHOR: Anna-Karin Hjalmarsson
DATE: March 1992

This report analyses the interactions which occur in reducing emissions from coal-fired plants. Control systems are in most areas the result of regulation on emissions to the atmosphere. Regulations were first introduced on emissions of particulates and then on sulphur and nitrogen oxides. As a result, each control system has often been optimised separately. Several control technologies for particulates, sulphur and nitrogen oxides interact with either positive or negative results.

Interactions may lead to operational problems in flue gas treatment plant, an increase in emissions, and even the production of new emissions. The chemical and physical properties of coal and other substances such as sorbents and additives might interact. A knowledge of interactions is important for the operation of existing control systems and in the choice of new systems. Negative results of interactions may be avoided and certain advantages may be gained from an integrated approach.

A more detailed knowledge of interactions throughout a plant is also required to improve energy efficiency, reduce emissions to the atmosphere and waste water as well as to produce residues that may find commercial use.