解聚
木质素
微波食品加热
单体
摩尔吸收率
材料科学
化学工程
有机化学
化学
聚合物
工程类
量子力学
光学
物理
作者
Wenliang Wang,Zhenhao Ma,Xingjin Zhao,Shiwei Liu,Liping Cai,Sheldon Q. Shi,Yonghao Ni
出处
期刊:ACS Sustainable Chemistry & Engineering
[American Chemical Society]
日期:2020-10-22
卷期号:8 (43): 16086-16090
被引量:14
标识
DOI:10.1021/acssuschemeng.0c04658
摘要
Microwave absorbents play a vital role in governing the monomeric products from lignin during the microwave-assisted depolymerization (MAD) process. The influence of various microwave absorbents on the conversion efficiency and lignin monomeric products in a dynamic vapor flow reaction system was investigated. Results showed that the selected microwave absorbents could linearly and rapidly heat lignin from 200 to 500 °C within 8 min under a microwave power of 1000 W. The yields of liquid products, guaiacols, and phenols were increased linearly with the heating rate (°C/min). The high microwave absorptivity of absorbents promoted the formation of liquid products and phenolic compounds. To offer further support, the use of MoS2 with a very high microwave absorptivity (185.0 °C/min) showed very high yields of liquid products (34.1 wt %) and phenolics (32.1 wt %). This work provided an effective methodology to enhance the lignin conversion efficiency to monomeric products using microwave absorbents.
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