Mechanism of Woody Biomass Pyrolysis and Gasification in a Fluidized Bed of Porous Alumina Particles

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• 作者：Koichi Matsuoka ; Takaaki Shinbori ; Koji Kuramoto ; Tetsuya Nanba ; Atsuko Morita ; Hiroyuki Hatano ; and Yoshizo Suzuki
• 刊名：Energy & Fuels
• 出版年：2006
• 出版时间：May 2006
• 年：2006
• 卷：20
• 期：3
• 页码：1315 - 1320
• 全文大小：298K
• 年卷期：v.20,no.3(May 2006)
• ISSN：1520-5029

文摘

To understand the mechanism of steam gasification of woody biomass, pyrolysis and gasification werecarried out at 773 and 973 K on porous -alumina in a two-stage fluidized bed reactor. Significant amountsof volatiles, including gas and tarry materials, were formed upon devolatilization, but the tar was mostly capturedby the alumina. The tar captured on the alumina was subsequently reformed with the steam to H₂ and CO.However, little of the char was gasified under the present conditions. CO and water molecules penetrated intothe large pores of the char, allowing the water-gas shift reaction to occur on the active sites on the surfaceof the char. Although the char itself was not gasified at these relatively low temperatures, it played an importantrole in the water-gas shift reaction.