关于核桃壳热解蒸汽冷凝温度对生物油成分和性质影响的研究。
Study on the effect of condensing temperature of walnut shells pyrolysis vapors on the composition and properties of bio-oil.
机构信息
Department of Thermal Science and Energy Engineering, University of Science and Technology of China, Hefei, Anhui 230026, PR China.
Department of Thermal Science and Energy Engineering, University of Science and Technology of China, Hefei, Anhui 230026, PR China.
出版信息
Bioresour Technol. 2019 Aug;285:121370. doi: 10.1016/j.biortech.2019.121370. Epub 2019 Apr 20.
The effect of condensing temperature on composition of bio-oil obtained via fractional condensation was investigated by pyrolysis-condensation experiments of walnut shells at condensing temperatures from 290 K to 370 K. The condensing efficiency of the first stage condenser decreased from 0.59 to 0.12 with increasing temperature. Moisture of bio-oil decreased from 40% to 5%, but the C/O ratio increased from 0.50 to 1.50. Compared with contents observed at the lowest condensation temperature, the maximum content of each component increased by 50%-500%. Combined with variations in condensing efficiency and composition content, the optimum condensing temperature range for declining water in bio-oil was 340-350 K. The condensing temperature associated with the enrichment of acetic acid and furfural was 345 K. The 355 K optimum condensing temperature could be selected to achieve the maximum enrichment of guaiacol and its derivatives.
通过在冷凝温度为 290K 至 370K 条件下对核桃壳进行热解-冷凝实验，研究了冷凝温度对分级冷凝法获得的生物油组成的影响。随着温度的升高，第一阶段冷凝器的冷凝效率从 0.59 降低至 0.12。生物油的水分从 40%降至 5%，但 C/O 比从 0.50 增加至 1.50。与最低冷凝温度下观察到的含量相比，每种成分的最大含量增加了 50%-500%。综合冷凝效率和成分含量的变化，生物油中水分下降的最佳冷凝温度范围为 340-350K。与醋酸和糠醛富集相关的冷凝温度为 345K。可以选择 355K 的最佳冷凝温度，以实现愈创木酚及其衍生物的最大富集。
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