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为探究生物质快速热解反应历程,利用裂解气质联用仪对生物质进行逐级热解实验,考察在不同温度区间热解液体产物组分的分布规律。实验结果表明,生物质的化学组成和热解温度区间对热解液体产物都有重要影响。桉木在25℃~400℃热解液体产物较少,主要是吡喃和芳香类化合物,其中5,6-二氢-4-羟基-吡喃-2-酮相对峰面积随温度升高而降低;在450℃~500℃热解液体产物种类和产量均较多,主要以酮类和芳香类化合物为主。玉米芯热解规律和桉木的相似,但在25℃~350℃主要以呋喃类化合物为主,主要热解液体产物是2,3-二氢-苯并呋喃和2-甲氧基-4-乙烯基苯酚,在400℃~450℃热解液体产物以酮类化合物为主。生物质主要化学组分在不同温度区间热解得到不同液体产物,对其进行选择性热解,能够有效实现生物质资源的综合利用。
In order to explore the process of rapid pyrolysis of biomass, the pyrolysis of biomass was carried out by pyrolysis gas chromatography-mass spectrometry. The distribution of the components of pyrolysis liquid in different temperature ranges was investigated. The experimental results show that the chemical composition of biomass and the pyrolysis temperature interval have an important impact on the pyrolysis liquid products. Eucalyptus pyrolytic liquid products at 25 ℃ ~ 400 ℃ less, mainly pyran and aromatic compounds, of which 5,6-dihydro-4-hydroxy-pyran-2-one relative peak area with temperature and Decreased; in the 450 ℃ ~ 500 ℃ pyrolysis liquid product types and yields are more, mainly ketones and aromatic compounds. The pyrolysis of corncob was similar to that of eucalyptus, but the main furan compounds were at 25 ℃ ~ 350 ℃. The main pyrolysis liquid products were 2,3-dihydro-benzofuran and 2-methoxy-4 - Vinylphenol, the pyrolysis liquid products at 400 ℃ ~ 450 ℃ are mainly ketones. The main chemical components of biomass are pyrolyzed at different temperature ranges to obtain different liquid products, which can be selectively pyrolyzed to effectively realize the comprehensive utilization of biomass resources.