Fast pyrolysis of biomass for bio-oil with ionic liquid and microwave irradiation
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摘要: 以离子液体1-丁基-3-甲基咪唑氯(\[Bmim\]Cl)和1-丁基-3甲基咪唑四氟化硼(\[Bmim\]BF4)为催化剂，在微波加热作用下，研究了稻草和锯屑的热解。微波加热20min，稻草和锯屑的生物油产率分别为38%和34%。考察了微波加热时间、微波功率和离子液体用量对生物质油产率的影响。当以相同的离子液体为催化剂时，稻草微波热解得到的生物质油产率大于锯屑的。生物油成分主要有糠醛、醋酸和1-羟基-2-丁酮等，其含量主要取决于生物质原料和加入的离子液体的类型。Abstract: The pyrolysis of rice straw and sawdust under microwave irradiation was performed with ionic liquids (ILs) 1-butyl-3-methylimidazolium chloride and 1-butyl-3-methylimidazolium tetrafluoroborate as catalysts. With microwave heating for 20min, the bio-oil yield from rice straw reached 38% and that from sawdust reached 34%. The effects of microwave heating time, microwave power, and IL dosage on bio-oil yields were discussed. The chemical components in bio-oil were analyzed by gas chromatography-mass spectroscopy technique. The main components in bio-oil are furfural, acetic acid, and 1-hydroxy-2-butanone, and their contents mainly depend on the source of biomass and the type of IL used in pyrolysis.
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Key words:
- biomass /
- pyrolysis /
- microwave /
- ionic liquid
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