稻壳热解油的特性

Characteristics of pyrolytic oil generated from rice husk

利用自行搭建的固定床热反应器对稻壳进行热解实验制备热解油，采用两种不同极性的石英毛细柱对收油后的二氯甲烷溶液进行GC-MS检测。实验结果表明：热解终温对热解油品的组分种类几乎无影响，但热解油产率随热解终温增大呈先升高后降低趋势；热解油二氯甲烷溶液的水相部分化合物种类相对较少，主要物质为甲酸、乙酸和1-羟基-2-丙酮，油相部分有机物种类极为复杂，主要物质为糠醛、糠醇以及酚类和酮类物质；可凝结的热解有机气体主要在500～600℃发生二次裂解；对稻壳600℃热解油油相检测时发现：在RTX-5MS柱检测条件下，组分中前5种化合物是糠醛、2-丁酮、乙酸、苯酚和2-甲氧基苯酚，而在RT X-WA X 柱检测条件下，前5种化合物是苯酚、2-甲氧基苯酚、4-乙基苯酚、乙酸和3-甲基苯酚。

The pyrolysis experiment of rice husk was conducted in a self-built fix bed heater. Two chromatographic columns,RTX-5MS and RTX-WAX,were used for the collection of mixture of pyrolytic oil and dichloromethane solution,which were later analyzed by GC-MS. Results showed that the compositions of pyrolytic oils at different final temperatures changed little. As the pyrolysis temperature rose , pyrolytic oil yield first increased and then decreased. The water phase of dichloromethane and pyrolytic oil solution contained relatively few compounds,mainly formic acid, acetic acid,and 1-hydroxy-2-propanone,while the oil phase contained complicated compounds, including furfural,furfuryl alcohol,phenols and ketones. The analysis of dichloromethane in oil phase and pyrolytic oil solution at 600℃ showed that through column RTX-5MS analysis,the first five compounds were furfural,2-butanone,acetic acid,phenol and 2-methoxy phenol,and that through RTX-WAX column analysis,the first five compounds were phenol,2-methoxy phenol,4-ethyl phenol, acetic acid and 3-methyl phenol.