An investigation into the use of CFD to model the co-firing ofJatropha curcasseed cake with coal

Abstract

Jatropha curcas seed cake is a potential candidate for co-firing with coal. Combustion modelling using Ansys Fluent 14.0 was carried out to assess the combustion and co-firing characteristics of untorrefied and torrefied Jatropha curcas seed cake. The effect of torrefaction on the devolatilisation characteristics, flame properties and consequently NOx pollutant formation was established. Compared to the torrefied biomass, the untorrefied seed cake devolatilised earlier, had a more dispersed flame and higher NO formation. The higher reactivity of the biomass was shown to have a positive effect on the devolatilisation rate of the less reactive coal under co-firing simulations.

Experimental study on multi‐fuel combustion of lean coal and by‐product gas in a 75t/h tangentially‐fired boiler

“…[7][8] There has owned an increasing amount of literature on multi-fuel combustion of alternative fuels and coal in the boiler. For example, the effects of fat coal and lean coal, 9 pulverized coal and BFG, 10 pulverized coal and biomass, [11][12][13] and pulverized coal and sludge [14][15][16] mixing on the mixed-fired boiler are studied through numerical simulations.…”

Improving Pulverized Coal and Biomass Co‐Combustion in a Cement Rotary Kiln by Computational Fluid Dynamics

“…By analyzing the results, they suggested a biomass share of 10–15 % as an optimal solution. Madanayake et al numerically evaluated the influence of the torrefaction process on co‐combustion characteristics inside a drop tube furnace. They concluded that untorrefied biomass caused dispersion of the flame, and consequently lower NO emissions.…”