Ultrasonic and microwave assisted organosolv pretreatment of pine wood for producing pyrolytic sugars and phenols

doi:10.1016/j.indcrop.2020.112921

	Ultrasonic and microwave assisted organosolv pretreatment of pine wood for producing pyrolytic sugars and phenols
	Yang, Xingwei 1,2,3,4; Cui, Chaoxian 1,2,3,4; Zheng, Anqing 2,3,4; Zhao, Zengli 2,3,4; Wang, Chenyang 1,2,3,4; Xia, Shengpeng 1,2,3,4; Huang, Zhen 2,3,4; Wei, Guoqiang 2,3,4; Li, Haibin 2,3,4
刊名	INDUSTRIAL CROPS AND PRODUCTS
	2020-12-01
卷号	157 页码:10
关键词	Microwave heating Organosolv pretreatment Fast pyrolysis Fermentable sugar Phenols
ISSN号	0926-6690
DOI	10.1016/j.indcrop.2020.112921
通讯作者	Zheng, Anqing(zhengaq@ms.giec.ac.cn)
英文摘要	Efficient fermentable sugar release from softwood biomass is considerably hampered by the recalcitrant nature of its plant cell wall. Here, we reported an ultrasonic and microwave assisted ethylene glycol pretreatment coupled with fast pyrolysis to make total utilization of softwood (pine sawdust) for pyrolytic sugar (levoglucosan), hemicellulosic sugar and phenol production. Compared with oil bath heating, fractionation of pine sawdust into cellulose rich fraction, hemicellulosic sugars and organosolv lignin was enhanced drastically after applying ultrasonic and microwave heating. Whereas, ultrasonic radiation prior to microwave heating turned out to slightly inhibit the fractionation due to oxygenation of sulfuric acid. Mechanistic insight into levoglucosan formation pathway revealed that microwave heating promoted the cleavage of covalent bonds, aromatic ether linkages and glycosidic bonds in lignocellulose, leading to significant improvement in biomass recalcitrance alleviation as well as alkaline and alkaline earth metal removal. This considerably facilitated the heterolytic cleavage of cellulose into levoglucosan, while inhibiting the formation of microorganism inhibitors (e.g. carboxylic acids and phenols) and other light oxygenates in the pyrolysate. Levoglucosan yield exhibited a drastic increase from 3.53 (pine sawdust) to 48.13 wt.% via single microwave heating at 240 W, which was further enhanced with increasing microwave power. Hemicellulosic sugar derived from organosolvolysis and phenol from fast pyrolysis of organosolv lignin also showed an increase in yields with increasing pretreatment severity. Ethylene glycol pretreatment via single microwave heating at 480 W was a preferable process for achieving high yields of levoglucosan (55.87 wt.%), hemicellulosic sugars (19.96 wt.%) and phenols (14.04 wt.%). These findings help to provide an efficient process for maximizing the conversion of recalcitrant softwood for the production of fermentable sugars and phenols.
资助项目	National Natural Science Foundation of China[51876208] ; National Natural Science Foundation of China[51776209] ; National Natural Science Foundation of China[51606204] ; Major International (Regional) Joint Research Project of the National Science Foundation of China[51661145011] ; National Key R&D Program of China[2017YFE0124200] ; Science and Technology Planning Project of Guangdong Province, China[2014B020216004] ; Science and Technology Planning Project of Guangdong Province, China[2015A020215024] ; Youth Innovation Promotion Association, CAS[2018383] ; Pearl River S&T Nova Program of Guangzhou[201806010061]
WOS关键词	OVERCOMING BIOMASS RECALCITRANCE ; LIGNOCELLULOSIC BIOMASS ; ENZYMATIC-HYDROLYSIS ; CHEMICAL-STRUCTURE ; ORGANIC-SOLVENT ; SOFT WOOD ; LIGNIN ; DIGESTIBILITY ; BEHAVIOR ; ETHANOL
WOS研究方向	Agriculture
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000587922300029
资助机构	National Natural Science Foundation of China ; Major International (Regional) Joint Research Project of the National Science Foundation of China ; National Key R&D Program of China ; Science and Technology Planning Project of Guangdong Province, China ; Youth Innovation Promotion Association, CAS ; Pearl River S&T Nova Program of Guangzhou
内容类型	期刊论文
源URL	[http://ir.giec.ac.cn/handle/344007/34865]
专题	中国科学院广州能源研究所
通讯作者	Zheng, Anqing
作者单位	1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Guangdong Prov Key Lab New & Renewable Energy Res, Guangzhou 510640, Peoples R China 3.CAS Key Lab Renewable Energy, Guangzhou 510640, Peoples R China 4.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Peoples R China
推荐引用方式 GB/T 7714	Yang, Xingwei,Cui, Chaoxian,Zheng, Anqing,et al. Ultrasonic and microwave assisted organosolv pretreatment of pine wood for producing pyrolytic sugars and phenols[J]. INDUSTRIAL CROPS AND PRODUCTS,2020,157:10.
APA	Yang, Xingwei.,Cui, Chaoxian.,Zheng, Anqing.,Zhao, Zengli.,Wang, Chenyang.,...&Li, Haibin.(2020).Ultrasonic and microwave assisted organosolv pretreatment of pine wood for producing pyrolytic sugars and phenols.INDUSTRIAL CROPS AND PRODUCTS,157,10.
MLA	Yang, Xingwei,et al."Ultrasonic and microwave assisted organosolv pretreatment of pine wood for producing pyrolytic sugars and phenols".INDUSTRIAL CROPS AND PRODUCTS 157(2020):10.