不同气氛下杨树木屑的微波裂解特性研究

doi:10.3969/j.issn.0253-2417.2017.06.012

Abstract

Abstract: Microwave pyrolysis of sawdust under CO₂ and N₂ atmosphere was investigated respectively. The results showed that different atmosphere had effects on the composition of pyrolytic oil, the nature of coke and the composition of gas. The maximum bio-oil yield(28.42%) was obtained under N₂ atmosphere at 900 W, the percentages of esters and phenols in the oil were 67.2% and 20.5% at 800W,respectively. The contents of acid, aldehydes and alcohols in pyrolytic product were low. The BET specific surface area of obtained coke was 125.44 m²/g. CO₂ affected the nature of bio-oil and coke by participating in the reaction. The maximum bio-oil yield(30.05%) under CO₂ atmosphere was obtained at 800 W, the percentage of esters reduced to 45.8%, and the phenols increased to 26.4%. The contents of acid, aldehydes and alcohols had nearly doubled. The BET specific surface area of coke increased to 136.85 m²/g. The CO₂ atmosphere reduced the H₂ content and increased the CO content in gas product.

Key words: N₂, CO₂, sawdust, microwave pyrolysis, pyrolysis oil

CLC Number:

TQ35

GUO Liang, QI Wei, LIAO Lifang, WEI Ting, XU Qingli, YAN Yongjie. Microwave Pyrolysis Characteristics of Poplar Sawdust Under Different Atmosphere[J]. Chemistry and Industry of Forest Products, 2017, 37(6): 89-94.

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Microwave Pyrolysis Characteristics of Poplar Sawdust Under Different Atmosphere

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