不同白腐真菌生物预处理对玉米秸秆热重和化学特性的影响。
Effect of biopretreatment on thermogravimetric and chemical characteristics of corn stover by different white-rot fungi.
机构信息
Key Laboratory of Molecular Biophysics of MOE, Huazhong University of Science and Technology, Luoyu Road 1037, Wuhan, PR China.
出版信息
Bioresour Technol. 2010 Jul;101(14):5475-9. doi: 10.1016/j.biortech.2010.01.129. Epub 2010 Mar 5.
The thermogravimetric and chemical characterization of corn stover biopretreated by three different species of white-rot fungi have been studied in this research. Results indicated that biopretreatment can optimize the thermal decomposition, decrease the reaction temperature and reduce the gas contamination (SO(x)), making the biomass pyrolysis more efficient and environmentally friendly. Biopretreatment can decrease the activation energy and reacting temperature of the hemicellulose and cellulose pyrolysis (up to 36 degrees C), shorten the temperature range of the active pyrolysis (up to 14 degrees C), and increase the thermal decomposition rate, greatly promoting the reaction and making the biomass pyrolysis easier to start and carry on. On the other hand, by biopretreatment, the sulphur content can decrease up to 46.15%, which can considerably reduce the inventory of SO(x) emission. Moreover, the mechanism of the biopretreatment was also explored that the deconstruction and depolymerization of the recalcitrant linkages of lignin and cellulose by biopretreatment can make the structure of biomass incompact and easier to be pyrolyzed.
本研究对三种不同白腐真菌预处理玉米秸秆的热重和化学特性进行了研究。结果表明，生物预处理可以优化热解过程，降低反应温度，减少气体污染物（SO(x)），使生物质热解更高效、更环保。生物预处理可以降低半纤维素和纤维素热解的活化能和反应温度（最高可达 36°C），缩短活性热解的温度范围（最高可达 14°C），提高热分解速率，极大地促进反应，使生物质热解更容易启动和进行。另一方面，通过生物预处理，硫含量可降低高达 46.15%，这可以大大减少 SO(x)排放的库存。此外，还探讨了生物预处理的机制，即生物预处理可以使木质素和纤维素的难降解键发生解构和降解，使生物质结构变得不紧密，更容易进行热解。
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