Catalytic combustion of sulfur-containing liquid fuels in the fluidized bed: Experiment and modeling

다국어 초록 (Multilingual Abstract)

Environmentally safe fuel combustion is an actual worldwide problem. The alternative technology ofcombustion influidized bed of catalyst was developed in the Boreskov Institute of Catalysis. Thetechnology allows one to conduct the process at 400–700 oC and significantly reduce outletconcentrations of toxic compounds. However, the use of sulfur oils as fuel demands solving a problemof the decreasing the outlet SO2 concentration because the oils contain small amount of ash to absorbSO2. The work is devoted to study features of sulfur light oil and high-sulfur heavy oil combustion in thefluidized bed of the Al–Cu–Cr-oxide catalyst. Reduction of SO2 emission at conserving oxidation degree ofoils within range of 99.5–99.8% might be reached by using a non-isothermal temperature profile in thereactor as well as a use of CaCO3 or CaO at Ca/S > 2 to absorb sulfur oxides. The non-isothermaltemperature profile in the reactor consisted of an oxidation zone with the temperature in thefluidizedbed of 700 oC and a catalytic oxidation of SO2 to SO3 zone with equilibrium shift to reducing SO2concentration because of the temperature change from 700 oC to 585 oC.

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