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Enhancement of the Microwave-assisted Pyrolysis of Lignin by Adding Used Cigarette Filter
Received:May 25, 2020  
DOI：10.11980/j.issn.0254-508X.2020.09.005
Key Words:lignin  microwave-assisted pyrolysis  used cigarette filter  phenolic compounds  synergistic effect
Fund Project:国家自然科学基金（31800497）；国家级大学生创新创业训练计划（201910708041）。
Author NameAffiliationPostcode
WANG Wenliang Shaanxi Provincial Key Lab of Papermaking Technology and Specialty Paper Development， College of Bioresources Chemical and Materials Engineering， Shaanxi University of Science & Technology， Xi’an， Shaanxi Province， 710021
National Demonstration Center for Experimental Light Chemistry Engineering Education， Shaanxi University of Science & Technology， Xi’an， Shaanxi Province， 710021 		710021
HUANG Jiale Shaanxi Provincial Key Lab of Papermaking Technology and Specialty Paper Development， College of Bioresources Chemical and Materials Engineering， Shaanxi University of Science & Technology， Xi’an， Shaanxi Province， 710021 710021
CHEN Lei The 2nd Sub-institute of Industrial Engineering， Planning and Design Institute of Forest Products Industry， National Forestry and Grassland Administration， Beijing， 100010 100010
ZHAO Xingjin Shaanxi Provincial Key Lab of Papermaking Technology and Specialty Paper Development， College of Bioresources Chemical and Materials Engineering， Shaanxi University of Science & Technology， Xi’an， Shaanxi Province， 710021 710021
MA Zhenhao Shaanxi Provincial Key Lab of Papermaking Technology and Specialty Paper Development， College of Bioresources Chemical and Materials Engineering， Shaanxi University of Science & Technology， Xi’an， Shaanxi Province， 710021 710021
WANG Xubiao Shaanxi Provincial Key Lab of Papermaking Technology and Specialty Paper Development， College of Bioresources Chemical and Materials Engineering， Shaanxi University of Science & Technology， Xi’an， Shaanxi Province， 710021 710021
LI Xinping Shaanxi Provincial Key Lab of Papermaking Technology and Specialty Paper Development， College of Bioresources Chemical and Materials Engineering， Shaanxi University of Science & Technology， Xi’an， Shaanxi Province， 710021 710021
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Abstract:Microwave-assisted pyrolysis of lignin exists some problems of low conversion efficiency and severe secondary reaction. In this study， used cigarette filter （UCF） particles were used to assist the fast pyrolysis of lignin and control the distribution of pyrolysis products. Results showed that with the increase of UCF adding proportion in lignin， the yield of bio oil increased gradually， and the yield of biochar decreased. Compared with the theoretical yield， the addition of UCF was conducive to the generation of bio oil and biochar. The adding of UCF reduced the yield of guaiacols from lignin pyrolysis by demethylation or dehydroxylation reaction. The highest yields of P-hydroxyphenols （127.53 mg/g） and aromatic hydrocarbon （22.28 mg/g） were obtained with 60% mass ratio of UCF to lignin. The analysis of solid products showed that the specific surface area of biochar increased gradually with the increasing of the proportion of UCF in lignin. UCF could form the structure of carbon fiber and attached and grew on the surface of lignin carbon. In this study， the remarkable synergistic effect between UCF and lignin was observed in the process of microwave-assisted pyrolysis which had great significance for the conversion efficiency of lignin and the high-value utilization of waste resources.
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