木質バイオマス充填層の熱分解における不均一反応，減容および熱伝導のモデリング
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概要
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In this review, experimental and numerical studies for heterogeneous chemical reaction, volume reduction and thermal conduction during pyrolysis of biomass in a packed bed were reported. The yield of solid component could be reproduced by the calculation using the Millers reaction model even if the heating rate and the lignin content changed. The volume reduction of the packed bed for softwood was closely related with the pyrolysis and divided into three regions ; i） region of dehydration from biomass, ii） region of pyrolysis of cellulose and iii） region of pyrolysis of lignin. The reduction process was explained by not only the Millers chemical reaction model with dependence of gas volume in the bed on the temperature but also the reversible first-order chemical reaction model. The calculated gas flow rate, taking into account the effect of the temperature distribution in the packed bed, agreed with the experimental results except for the flow rate due to tar decomposition. The time course of the average gas temperature in the packed bed was partly agreed with the calculation in taking account of porosity change. Furthermore, the temperature could be reproduced by the calculation with having the effect of volume reduction.
- 粉体工学会の論文