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以木粉为原料,在不同反应条件下利用Py-GC/MS装置对其进行快速热解,并对热解油气进行在线检测分析,研究反应温度和热解时间对生物油组成及其产率的影响。结果表明,在400℃条件下生物油组成单一,便于分离和提纯;继续升高温度,生物油组成及其产率均逐步增加;温度高于700℃,有利于轻质类和芳香烃类碳氢化合物的生成。同一反应温度,不同热解时间,生物油组成保持稳定,但各类化合物的产率均发生变化。在反应温度为600℃,反应时间为25 s的条件下,高附加值的苯酚类化合物的产率最高。
Using wood flour as raw material, Py-GC / MS was used to pyrolyze pyrolysis oil under different reaction conditions. The pyrolysis oil and gas were detected and analyzed online. The effects of reaction temperature and pyrolysis time on the composition and yield of bio-oil Impact. The results showed that the composition of bio-oil was single and easy to separate and purify at 400 ℃. The bio-oil composition and yield increased gradually with increasing temperature. When the temperature was higher than 700 ℃, it was beneficial to light and aromatic hydrocarbons Hydrogen compound generation. The same reaction temperature, different pyrolysis time, bio-oil composition remained stable, but the yield of various compounds were changed. Under the conditions of reaction temperature of 600 ℃ and reaction time of 25 s, the yield of phenols with high added value was the highest.