CAS Key Laboratory of Low-Carbon Conversion Science and Engineering, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China.
CAS Key Laboratory of Low-Carbon Conversion Science and Engineering, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, PR China.
Bioresour Technol. 2017 Aug;238:109-115. doi: 10.1016/j.biortech.2017.04.030. Epub 2017 Apr 9.
Microwave-assisted pyrolysis of wood sawdust for phenolic rich compounds was carried out between 400 and 550°C in a batch reactor. An efficient preparation of liquid products was observed at 500°C with a yield of 58.50%, which was similar to conventional fast pyrolysis. The highest concentration of phenolic compounds in liquid product reached up to 78.7% (area) in which the alkoxy phenols contributed 81.8% at 500°C. Microwave thermogravimetric analysis using KAS method was used firstly to investigate the low-temperature pyrolytic behaviors and activation energy. The results indicated that effective pyrolytic range was 250-400°C and average activation energy was 42.78kJ/mol, which were 50-100°C and 50-100kJ/mol lower than conventional pyrolysis, respectively. Analysis on dielectric properties of pyrolytic products confirmed that accelerated pyrolysis and low temperature were attributed to the formation of instantaneous "hot spots".
在间歇式反应器中，研究了在 400-550°C 范围内，利用微波辅助热解木屑生产富含酚类化合物的液体产物。在 500°C 下，液体产物的收率为 58.50%，与传统快速热解相当，可得到有效的液体产物。在液体产物中，酚类化合物的最高浓度可达 78.7%（面积），其中烷氧基酚的浓度在 500°C 时达到 81.8%。首次采用 KAS 法对微波热重分析进行了低温热解行为和活化能的研究。结果表明，有效的热解范围为 250-400°C，平均活化能为 42.78kJ/mol，分别比传统热解低 50-100°C 和 50-100kJ/mol。对热解产物介电性能的分析证实，加速热解和低温归因于瞬时“热点”的形成。
