Ethylenediamine Enhances Ionic Liquid Pretreatment Performance at High Solid Loading

doi:10.1021/acssuschemeng.0c03884

	Ethylenediamine Enhances Ionic Liquid Pretreatment Performance at High Solid Loading
	Xu, Li 1,3,4; Li, Wen-Chao 5; Xin, Jiayu 2; Zhang, Sen-Jia 5; Li, Bing-Zhi 1,3,4; Yuan, Ying-Jin 1,3,4
刊名	ACS SUSTAINABLE CHEMISTRY & ENGINEERING
	2020-08-31
卷号	8 期号:34 页码:13007-13018
关键词	Lignocellulose Ionic liquid pretreatment High biomass loading Sugar release Lignin fractionation Biofuels
ISSN号	2168-0485
DOI	10.1021/acssuschemeng.0c03884
英文摘要	Higher biomass loading (>= 20% w/w) in pretreatment unit operations for lignocellulosic biorefineries will lead to a better economic feasibility and higher green efficiency. However, the industrial development behind high biomass loading in ionic liquid pretreatment has been hindered by unsatisfactory lignin fractionation and fermentable sugar release. Here, this study demonstrates that the addition of ethylenediamine (EDA) effectively improved glucose and xylose release in pretreatment using a 1-ethyl-3-methylimidazolium acetate ([Emim][OAc])-based system at corn stover loadings as high as 36% w/w under facile conditions. It was discovered that synergistic pretreatment with ILs and EDA pretreatment with a 10% v/v EDA ratio in [Emim] [OAc] was optimal for maximizing fermentable sugar yields, showing glucose yields of 94% and xylose yields of 48% based on untreated biomass; meanwhile, xylan loss was avoided due to low EDA loading. Additionally, the synergistic effect between [Emim] [OAc] and EDA further reduced cellulose crystallinity when compared to the single pretreatment with [Emim] [OAc] or EDA. In synergistic pretreatment, it was revealed that EDA played a crucial role in the cleavage of lignin-carbohydrate complex linkages, lignin relocalization, and removal at high solid loading, which provided "easy and simple" pathways for [Emim] [OAc] to attack crystalline domains of native cellulose. Also, there were more native beta-O-4 structures preserved in treated lignin after this synergistic pretreatment, offering a potential to make downstream lignin valorization even easier and more efficient. In addition, to achieve excellent performance, synergistic pretreatment could diminish requirements for pretreatment severity relative to single [Emim] [OAc] pretreatment, which reduced glucan loss as well as energy consumption in the pretreatment process. This new approach sheds further light on understanding solid-state pretreatment and forward bioconversion in biomass.
资助项目	Tianjin Fund for Distinguished Young Scholars[19JCJQJC63300] ; National Natural Science Foundation of China[21622605]
WOS关键词	LIGNOCELLULOSIC BIOMASS ; ENZYMATIC-HYDROLYSIS ; CORN STOVER ; CELL-WALLS ; CELLULOSE ; LIGNIN ; ACID ; DELIGNIFICATION ; DECONSTRUCTION ; DIGESTIBILITY
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Engineering
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000567778600029
资助机构	Tianjin Fund for Distinguished Young Scholars ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/42046]
专题	中国科学院过程工程研究所
通讯作者	Li, Bing-Zhi
作者单位	1.Tianjin Univ, Collaborat Innovat Ctr Chem Sci & Engn Tianjin, Tianjin 300072, Peoples R China 2.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing Key Lab Ion Liquids Clean Proc, Beijing 100190, Peoples R China 3.Tianjin Univ, Frontiers Sci Ctr Synthet Biol, Tianjin 300072, Peoples R China 4.Tianjin Univ, Key Lab Syst Bioengn, Minist Educ, Sch Chem Engn & Technol, Tianjin 300072, Peoples R China 5.Tianjin Univ Sci & Technol, Minist Educ, Key Lab Ind Fermentat Microbiol, Tianjin 300457, Peoples R China
推荐引用方式 GB/T 7714	Xu, Li,Li, Wen-Chao,Xin, Jiayu,et al. Ethylenediamine Enhances Ionic Liquid Pretreatment Performance at High Solid Loading[J]. ACS SUSTAINABLE CHEMISTRY & ENGINEERING,2020,8(34):13007-13018.
APA	Xu, Li,Li, Wen-Chao,Xin, Jiayu,Zhang, Sen-Jia,Li, Bing-Zhi,&Yuan, Ying-Jin.(2020).Ethylenediamine Enhances Ionic Liquid Pretreatment Performance at High Solid Loading.ACS SUSTAINABLE CHEMISTRY & ENGINEERING,8(34),13007-13018.
MLA	Xu, Li,et al."Ethylenediamine Enhances Ionic Liquid Pretreatment Performance at High Solid Loading".ACS SUSTAINABLE CHEMISTRY & ENGINEERING 8.34(2020):13007-13018.