微藻-细菌颗粒污泥热解研究：产物、动力学及潜在机制。
Investigations on the pyrolysis of microalgal-bacterial granular sludge: Products, kinetics, and potential mechanisms.
机构信息
State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; Advanced Environmental Biotechnology Centre, Nanyang Environment & Water Research Institute, Nanyang Technological University, Singapore 637141, Singapore; University of Chinese Academy of Sciences, Beijing 100049, China.
School of Environment, Henan Normal University, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Xinxiang 453007, China.
出版信息
Bioresour Technol. 2022 Apr;349:126328. doi: 10.1016/j.biortech.2021.126328. Epub 2021 Nov 13.
This study investigated the pyrolysis of microalgal-bacterial granular sludge for producing bio-oil and biochar. Results showed that the bio-oil productivity of pyrolyzed MBGS reached 39.5-45.4 wt%, while 23.8-41.2% for the nitrogen-containing bio-oil at the temperature of 673-1073 K. Meanwhile the biochar with a nitrogen content of 3.7-7.0 wt% could also be produced. Moreover, the Van-Krevelen diagram revealed that produced bio-oil had a H/C ratio higher than that from agroforestry biomass, but its O/C ratio was found to be similar to those of coal and biochar. It further appeared from a mass conservation analysis that the highest bio-oil production yield was achieved at a pyrolysis temperature of 773 K, while the pyrolytic kinetics of MBGS in the temperature range studied was governed by the 3-D diffusion mechanism with the activation energy of 224.96 kJ·mol.
本研究探讨了微藻-细菌颗粒污泥热解制备生物油和生物炭。结果表明，在 673-1073 K 的温度下，热解 MBGS 的生物油产率达到 39.5-45.4wt%，而含氮生物油的产率为 23.8-41.2%。同时，还可以生产出含氮量为 3.7-7.0wt%的生物炭。此外，范·克里夫伦图表明，所制备的生物油的 H/C 比高于农林生物质，但 O/C 比与煤和生物炭相似。进一步的质量守恒分析表明，在 773 K 的热解温度下，生物油的最高产率达到了最高，而在研究的温度范围内，MBGS 的热解动力学受 3-D 扩散机制控制，其活化能为 224.96 kJ·mol。
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