Abstract
Publisher Summary This chapter discusses the reburning efficiency of a pyrolysis gas produced in an entrained flow or fluidized-bed reactor. Pyrolysis experiments are performed for a series of Australian and German coals and combustion studies in a two-stage fuel splitting and staging reactor. Fuel staging or reburning is an efficient method to reduce NOx emissions from bituminous and brown coals. With coal pyrolysis gas as reburn fuel, the NOx reduction is improved. The German emission standards of 200 mg/m3 at 6% oxygen (O2) are achieved at the test facility. The optimum pyrolysis temperature for brown coal maximum NOx reduction is determined at 800°C. At this temperature, the pyrolysis gas contains maximum concentrations of tar, hydrocarbons, and ammonia (NH3).
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