Estimation of the Laminar Flame Speed of Producer Gas from Biomass Gasification

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• 作者：Juan J. Hernandez ; Magí ; n Lapuerta ; Clara Serrano ; and Andres Melgar
• 刊名：Energy & Fuels
• 出版年：2005
• 出版时间：September 2005
• 年：2005
• 卷：19
• 期：5
• 页码：2172 - 2178
• 全文大小：306K
• 年卷期：v.19,no.5(September 2005)
• ISSN：1520-5029

文摘

Because of the importance that the energy use of agricultural and forestry wastes has acquiredover the last years, results for the laminar flame speed of producer gas coming from the gasificationof lignocellulosic biomass are presented in this work. These results have great interest for thedevelopment of combustion models that provide significant information to be used as a tool forthe optimization and design of specific internal combustion engines. The CHEMKIN software,together with the GRI-Mech chemical reaction mechanism, has been used to compute the laminarflame speed for different producer gas compositions, different values of pressure and temperature,and different producer gas/air equivalence ratios. The results have been compared with thoseobtained in an experimental combustion bomb, as well as with the laminar flame speed obtainedfor conventional fuels, showing that the flame speed of the producer gas is less than that ofisooctane but greater than that of methane. A sensitivity analysis shows the influence that thedominant chemical reactions and species have on the laminar flame speed of producer gas atdifferent producer gas/air equivalence ratios. Although good qualitative agreement has been found,some differences between experimental and modeled results at high pressure and temperatureare due to the instabilities in the experimental flame.