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NOX CONTROL TECHNOLOGIES APPLICABLE TO MUNICIPAL WASTE COMBUSTION
Citation:
White, D., K. Nebel, M. Gundappa, AND K. Ferry. NOX CONTROL TECHNOLOGIES APPLICABLE TO MUNICIPAL WASTE COMBUSTION. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/R-94/208 (NTIS PB95-144358), 1994.
Impact/Purpose:
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Description:
The report documents the key design and operating parameters, commercial status, demonstrated performance, and cost of three technologies available for reducing nitrogen oxide (NOx) emissions from municipal waste combustors (MWCs), and identifies technology research and development needs associated with natural gas injection (NGI), selective non-catalytic reduction (SNCR), and selective catalytic reduction (SCR). wo NG1 processes have been developed: (1) Methane de-NOx uses gas injection to inhibit NOx formation and appears capable of reducing NOx emissions from MWCs by approximately 60%; and (2) reburning uses gas injection to create reducing conditions that convert NOx formed in the primary combustion zone to molecular nitrogen. ecause of the relatively high temperatures required for these NOx-reduction reactions, it may be difficult to successfully apply reburning to modern mass-burn waterwall MWCS. ong- term emission reductions are 45-65% for SNCR and 80-90% for SCR. perating SNCR processes near the upper end of their performance range can result in unwanted emissions of ammonia or other byproduct gases. omparing costs, SCR is the most capital intensive, followed by advanced SNCR and advanced NGI. apital costs of NGI and conventional SNCR are comparable.