Ca. Miller et al., EVALUATION OF TIRE-DERIVED FUEL FOR USE IN NITROGEN-OXIDE REDUCTION BY REBURNING, Journal of the Air & Waste Management Association, 48(8), 1998, pp. 729-735
Tire-derived fuel (TDF) was tested in a small-scale (44 kW or 150,000
Btu/hr) combustor to determine its feasibility as a fuel for use in re
burning for control of nitrogen oxide (NO). TDF was gravity-fed into u
pward flowing combustion gases from a primary natural gas flame doped
with ammonia to simulate a high NO combustion process. Emissions of NO
, oxygen, carbon dioxide, carbon monoxide, and particulate matter were
measured. The tests varied the nominal primary NO level from 600 to 1
,200 ppm and the primary stoichiometry from 1.1 to 1.2, and used both
natural gas and TDF as reburn fuels. The reburn injection rate was var
ied to achieve 8-20% of the ti,tal heat input from the reburn fuel. NO
emissions reductions ranged between 20 and 63% when using TDF, depend
ing upon the rate of TDF injection, primary NO, and primary stoichiome
try. NO emission reductions when using natural gas as the reburn fuel
were consistently higher than those when using TDE While additional wo
rk remains to optimize the process and evaluate costs, TDF has been sh
own to have the potential to be a technically viable reburning fuel.