Abstract A set of fixed-bed biomass pyrolysis reactor incorporated with three-stage condensation columns was constructed in this study, and the effects of pyrolysis temperature, carrier gas flow rate and condensation temperature on biomass pyrolysis products were discussed systematically. Results show that as the pyrolysis temperature increased, the yield of liquid products initially increased with a maximum yield at 550 °C and then decreased. When the temperatures of the three-stage condensers were 110 °C, 0 °C, and −196 °C, the highest yields of bio-oil in each condenser were accordingly obtained at 550 °C, 450 °C, and 500 °C, respectively. Carrier gas flow rate and fractional condensation temperature indicated minimal influence on the total yield of liquid products. However, fractional condensation temperature had an obvious effect on the yields of the fractions. Gas chromatography/mass spectrometry revealed that the first fraction contained abundant phenolic compounds, the second fraction contained medium-boiling compounds with relatively high concentrations of water, acids, and ketones and the last fraction contained a minimal amount of hydrocarbons and water. Furthermore, higher pyrolysis temperature resulted in a higher yield of phenol products, whereas higher condensation temperature led to a higher concentration of phenols and dehydrated carbohydrates.

中文翻译：

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稻壳热解分馏制备多用途生物油

摘要 本研究搭建了一套带有三级冷凝塔的固定床生物质热解反应器，系统地讨论了热解温度、载气流量和冷凝温度对生物质热解产物的影响。结果表明，随着热解温度的升高，液体产物的产率在550°C时产率最初增加，然后降低。当三级冷凝器的温度分别为110°C、0°C和-196°C时，相应地在550°C、450°C和500°C下获得了每个冷凝器中生物油的最高产率， 分别。载气流速和分馏温度表明对液体产品总产率的影响最小。然而，分馏温度对馏分收率有明显影响。气相色谱/质谱分析表明，第一个馏分含有丰富的酚类化合物，第二个馏分含有中等沸点化合物，水、酸和酮的浓度相对较高，最后一个馏分含有最少量的烃和水。此外，较高的热解温度导致苯酚产物的产率较高，而较高的缩合温度导致较高浓度的苯酚和脱水碳水化合物。和酮，最后一部分含有最少量的碳氢化合物和水。此外，较高的热解温度导致苯酚产物的产率较高，而较高的缩合温度导致较高浓度的苯酚和脱水碳水化合物。和酮，最后一部分含有最少量的碳氢化合物和水。此外，较高的热解温度导致苯酚产物的产率较高，而较高的缩合温度导致较高浓度的苯酚和脱水碳水化合物。