Gasification of oil shale dust in a counterflow moving bed filtration combustion reactor

摘要

Experimental investigation of gasification of oil shale dust in a counterflow moving bed filtration combustion reactor was carried out. The process was implemented similar to filtration combustion of gases: pulverized solid fuel supplied simultaneously with oxidizer. For a controlled supply of fuel dust a new rotating dispenser was used. Characteristics of process depending on the equivalence ratio were obtained. The absence of a rise in pressure drop over time indicates the lack of fuel accumulation and ash inside the porous bed, all ash was carried out from the reactor with a gas stream. It is shown that an increase in the flow rate of a gaseous oxidizer leads to an increase in both temperature and the inert velocity. The inert velocity, the calorific value of gaseous products, and the efficiency of gasification increase almost linearly with the equivalence ratio. Proposed method allows producing combustible gaseous products without a noticeable concentration of pyrolysis tars and calorific value up to 4 MJ/m(3), gasification efficiency was similar to 85%. (C) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.