CO2 Char Gasification Rates of Sawdust, Switchgrass, and Corn Stover in a Pressurized Entrained-Flow Reactor

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• 作者：Aaron D. Lewis ; Emmett G. Fletcher ; Thomas H. Fletcher
• 刊名：Energy & Fuels
• 出版年：2014
• 出版时间：September 18, 2014
• 年：2014
• 卷：28
• 期：9
• 页码：5812-5825
• 全文大小：667K
• ISSN：1520-5029

文摘

An entrained-flow flat-flame burner reactor was used to measure apparent CO₂ gasification rates of near-spherical biomass chars of poplar sawdust, switchgrass, and corn stover using particle residence times <270 ms at total pressures of 10 and 15 atm. The gas temperature and bulk CO₂ partial pressure ranges in these gasification experiments were 1258鈥?891 K and 6.1鈥?3.5 atm, respectively. A new method was developed to produce near-spherical particles from nonspherical biomass chars. The apparent CO₂ gasification rates for the three biomass chars with mean diameters near 100 渭m were fit to a global first-order model, and the optimal kinetic parameters are reported. The measured gasification rate of poplar sawdust was about 3.9 times faster than that of switchgrass char, but only about 20% faster than that of the corn stover char.