木质纤维素和藻类生物质的微波诱导热解比较研究。
A Comparative study of microwave-induced pyrolysis of lignocellulosic and algal biomass.
机构信息
Key Laboratory of Advanced Coal and Coking Technology of Liaoning Province, School of Chemical Engineering, University of Science and Technology Liaoning, Anshan 114051, China.
Key Laboratory of Advanced Coal and Coking Technology of Liaoning Province, School of Chemical Engineering, University of Science and Technology Liaoning, Anshan 114051, China; Chemical Engineering, University of Newcastle, Callaghan, NSW 2308, Australia.
出版信息
Bioresour Technol. 2015 Aug;190:89-96. doi: 10.1016/j.biortech.2015.04.038. Epub 2015 Apr 18.
Microwave (MW) pyrolysis of algal and lignocellulosic biomass samples were studied using a modified domestic oven. The pyrolysis temperature was recorded continuously by inserting a thermocouple into the samples. Temperatures as high as 1170 and 1015°C were achieved for peanut shell and Chlorella vulgaris. The activation energy for MW pyrolysis was calculated by Coats-Redfern method and the values were 221.96 and 214.27kJ/mol for peanut shell and C. vulgaris, respectively. Bio-oil yields reached to 27.7wt.% and 11.0wt.% during pyrolysis of C. vulgaris and peanut shell, respectively. The bio-oil samples from pyrolysis were analyzed by a gas chromatography-mass spectrometry (GC-MS). Bio-oil from lignocellulosic biomass pyrolysis contained more phenolic compounds while that from microalgae pyrolysis contained more nitrogen-containing species. Fourier transform infrared spectroscopy (FTIR) analysis results showed that concentration of OH, CH, CO, OCH3, and CO functional groups in char samples decreased significantly after pyrolysis.
采用改进的家用烤箱对藻类和木质纤维素生物质样品进行微波热解研究。通过将热电偶插入样品中，连续记录热解温度。花生壳和普通小球藻的最高温度分别达到 1170°C 和 1015°C。通过 Coats-Redfern 法计算微波热解的活化能，花生壳和普通小球藻的活化能分别为 221.96kJ/mol 和 214.27kJ/mol。在普通小球藻和花生壳的热解过程中，生物油的产率分别达到 27.7wt.%和 11.0wt.%。通过气相色谱-质谱联用仪（GC-MS）对热解得到的生物油样品进行分析。木质纤维素生物质热解得到的生物油中含有更多的酚类化合物，而微藻热解得到的生物油中含有更多的含氮物种。傅里叶变换红外光谱（FTIR）分析结果表明，热解后，炭样品中 OH、CH、CO、OCH3 和 CO 官能团的浓度显著降低。
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