Modeling Approaches to Predict Biomass Co-firing with Pulverized Coal

Abstract

The main motivation for co-firing coal with biomass is carbon dioxide emission reduction, while it can also lead to sulfur oxide reduction and suppress formation of nitric oxide from fuel nitrogen. Due to the fact that the coal is mainly used for power generation in its pulverized form, the emphasis in co-firing technologies is often given to co-combustion of pulverized biomass and coal. This facilitates the modeling approach to biomass combustion, since it may be considered in a way similar to the coal dust modeling. On the other hand, when compared to the pulverized coal, there are also significant differences. The differences correspond to the biomass composition depending on its origin, to mostly larger particle size, as well as to an irregular shape of biomass particles. The paper presents a review of modeling approaches and discusses recent progress in prediction of processes during biomass co-firing with pulverized coal. The main aim of the review is to facilitate the selection of submodels and methods to those dealing with the problems of modeling and simulation of practical biomass-coal co-firing systems. Future needs, goals and challenges in the field are presented as well.

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Methods of energy extraction from microalgal biomass: a review

“…Non-microalgal biomass particles are normally much bigger than pulverised coal and the amount of energy required for grinding of the biomass to a diameter of less than 1 mm (2-3 % of the heating value) is almost double that required for coal pulverisation (0.9-1.2 % of the heating value). The energy requirements for biomass pulverisation increase significantly (>20 % of the heating value) for fibrous and or moist biomass (Belosevic 2010). The combustion of biomass can generate fine particle emissions which can be harmful to health, with the amount, type and quantity of particulate emissions being influenced by biomass type, combustion technology and emission control equipment (Sippula 2010).…”

Corrosion Problems in Incinerators and Biomass-Fuel-Fired Boilers

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