SO/sub 2//NO/sub x/ control compliance with environmental regulations

The sources of SO/sub 2/ and NO/sub x/ in a Portland cement kiln system are identified. A brief discussion of several known and theoretical control methods for cement-plant SO/sub 2/ and NO/sub x/ emissions is presented. The US Portland cement industry is shown to be a minor contributor of SO/sub 2/ and NO/sub x/ to atmospheric contamination. The anticipated need and/or requirement for continuous monitoring of SO/sub 2/ and NO/sub x/ is discussed. The political climate for regulation of SO/sub 2/ and NO/sub x/ is examined. Consideration is given to an emerging environmental issue, the greenhouse effect, to which the carbon dioxide emissions of cement plants may contribute.<
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