パルプ黒液を含むバイオブリケットのガス化反応速度解析

抄録

The objectives of this study are to evaluate the gasification reactivity of a mixture of coal/biomass using a thermogravimetry (TG) apparatus. The experiments have been performed with biobriquette contain-ing pulp black liquor (0-15wt%). A char is initially formed by pyrolysis of the samples for an hour under helium gas stream at different temperatures (973-1373K), and subsequently gasified with an oxidizer (CO₂, H₂O) for another an hour at the same temperatures as in pyrolysis.
The results show that; (1) The gasification reactions of the samples with CO₂ or H₂O are first-order with respect to the conversion of char, and the rates can be expressed by Arrhenius equation {k=A exp (-E/RT)}. Furthermore, the gasification at the lower concentrations (2-20vol%) of CO₂ obeys the Langmuir-Hinshelwood reaction mechanism.(2) The addition (5-15wt%) of pulp waste to biobriquette had a greater effect on increas-ing (2-3 times) the gasification rates.(3) This effect may be due to catalysis by alkaline metal (Na) involved in pulp waste.