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This study inspects the occurrence of synergy in the co-gasification of coal and biomass in a fixed bed reactor. Two separate and a pre-mixed bed configurations with a congruent sample mass are designed for comparative study. The intimate contact between bio-ash and coal char grains is a prerequisite for the occurrence of the synergy effect in the co-gasification of coal and biomass. The separate...
Combined co-pyrolysis/gasification of bituminous coal (BC) and walnut shell (WS) are comparatively studied with both conventional and congruent-mass thermogravimertric analysis (TGA) methods. The results indicate that BC and WS exhibit additivity in the co-pyrolysis step. However, the gasification reactivity of chars in subsequent gasification step exhibits remarkable sample-mass dependence, which...
The effect of fuel origin on synergy in coal/biomass blends during co-gasification has been assessed using a congruent-mass thermogravimetry analysis (TGA) method. Results revealed that synergy occurs when ash residuals are formed, followed by an almost complete gasification of biomass. Potassium species in biomass ash play a catalytic role in promoting gasification reactivity of coal char, which...
The process of co-gasification of coal and biomass offers the benefits of stable supplies of a primary energy resource – coal, with a partial replacement of a fossil fuel with a “zero-emission”, renewable energy source – biomass. The main objective of the experimental steam co-gasification study focused on hydrogen-rich gas generation, as a prospective clean energy carrier, was the determination of...
Energy generation is predominantly based on fossil fuels. This is related to their high energy density and abundance of resources, as well as market availability and maturity of conversion technologies. Increasing awareness of environmental concerns reflected in relevant regulations regarding the allowable levels of emission of contaminants in energy sector on the one hand, and increasing energy demand...
Co-gasified biomass and coal can be considered a potential fuel base for gasification and offers the advantage of a reduction in CO 2 emissions. In addition, use of biomass could contribute to a reduction in fossil fuel dependency. In this study, a mixture of coal and biomass was placed in a lab-scale tube furnace and co-pyrolyzed to be transformed to a char under nitrogen atmosphere. Three...
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