在垂直管式冷凝器中，冷凝温度对生物质热解蒸汽成分演变的实验研究。
Experimental study on composition evolution of biomass pyrolysis vapors with condensing temperature in a vertical tubular condenser.
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. 2020 Jul;307:123252. doi: 10.1016/j.biortech.2020.123252. Epub 2020 Mar 26.
The experiments on bio-oil recovery in a vertical tubular condenser with two flumes were conducted for speculating the componential distribution of walnut shell pyrolysis vapors during condensation. Bio-oil elements and functional groups from different locations of condenser were compared with each other. Aromatic H and H in phenolic OH were concentrated in the top and middle bio-oil and their percentage were improved with increasing water bath temperature. Ten representative compounds in bio-oil were chosen for quantitative analysis. As water bath temperature increased from 273 K to 353 K, the recovered water decreased by 85% whereas the guaiacol and its derivatives (guaiacols) merely decreased by 40%. Vapor distributions of water, acetic acid, furfural and guaiacols were simulated by the back analysis of bio-oil components. According to the simulated results, tubular condenser can be properly lengthened for promoting the recovery of specific components at high water bath temperatures.
在带有两个流道的垂直管式冷凝器中进行了生物油回收实验，以推测在冷凝过程中核桃壳热解蒸汽的成分分布。比较了冷凝器不同位置的生物油元素和官能团。芳香族 H 和酚羟基中的 H 在顶部和中部生物油中浓缩，并且随着水浴温度的升高，其百分比增加。选择了生物油中的 10 种代表性化合物进行定量分析。随着水浴温度从 273 K 升高到 353 K，回收水减少了 85%，而愈创木酚及其衍生物（愈创木酚）仅减少了 40%。通过生物油成分的反向分析模拟了水、乙酸、糠醛和愈创木酚的蒸汽分布。根据模拟结果，在高水浴温度下，可以适当延长管式冷凝器，以促进特定成分的回收。
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