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Effect of Various Microwave Absorbents on the Microwave-Assisted Lignin Depolymerization Process
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2020-10-22 , DOI: 10.1021/acssuschemeng.0c04658
Wenliang Wang 1, 2 , Zhenhao Ma 1 , Xingjin Zhao 1 , Shiwei Liu 3 , Liping Cai 4 , Sheldon Q. Shi 4 , Yonghao Ni 1, 2
Affiliation  

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.

中文翻译:

各种微波吸收剂对微波辅助木质素解聚过程的影响

在微波辅助解聚(MAD)过程中,微波吸收剂在控制木质素的单体产物中起着至关重要的作用。研究了各种微波吸收剂对动态气相反应系统中转化效率和木质素单体产物的影响。结果表明,所选择的微波吸收剂可以在1000 W的微波功率下,在8分钟内线性快速地将木质素从200加热到500°C。液体产品,愈创木酚和酚的产率随加热速率(°C)线性增加。 / min)。吸收剂的高微波吸收率促进了液体产物和酚类化合物的形成。为了提供进一步的支持,使用MoS 2具有非常高的微波吸收率(185.0°C / min)的液体产品(34.1 wt%)和酚类(32.1 wt%)的收率很高。这项工作提供了一种有效的方法,以提高使用微波吸收剂将木质素转化为单体产品的效率。
更新日期:2020-11-02
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