Effects of formaldehyde on fermentable sugars production in the low-cost pretreatment of corn stalk based on ionic liquids  

作　　者：Kaili Zhang Ligang Wei Qingqin Sun Jian Sun Kunlan Li Shangru Zhai Qingda An Junwang Zhang 

机构地区：[1]Faculty of Light Industry and Chemical Engineering,Dalian Polytechnic University,Dalian 116034,China [2]School of Life Sciences,Advanced Research Institute of Multidisciplinary Science,Beijing Institute of Technology,Beijing 100081,China

出　　处：《Chinese Journal of Chemical Engineering》2022年第2期406-414,共9页中国化学工程学报（英文版）

基　　金：supported by the National Natural Science Foun-dation of China(21776026,22078023);Liaoning Revitalization Talents Program(XLYC1902037).

摘　　要：Low cost processing of lignocellulosic biomass is of great importance for sustainable chemistry and engineering.Herein,a low cost system composed of 1-butyl-3-methylimidazolium chloride([C_(4)C_(1) im]Cl),HCl and formaldehyde(FA)was developed for the pretreatment of corn stalk at 80℃.The efficiency of this technology was compared with that in dioxane system or without FA addition.Due to FA stabilization,the extent of acid-hydrolysis of carbohydrate fraction can be significantly decreased while 70%above of lignin was removed with the pretreatment of[C_(4)C_(1) im]Cl/HCl/FA system at 80℃for 2 h.A maximum reducing sugar yield of 93.7%and glucose concentration of 7.0 mg·ml^(-1) were subsequently obtained from enzymatic hydrolysis of the slurry.There were great differences in compositions of small molecule degraded products obtained with FA addition or not.The present[C_(4)C_(1) im]C_(l) based system exhibits great potential of substituting volatile organic solvents(i.e.dioxane)in developing low cost lignocellulosic biomass pretreatment at low temperature.Also,this work would gain insight into understanding on the roles of stabilization methods on the economic improvement of IL based biomass processing.

关 键 词：Ionic liquid FORMALDEHYDE Low cost pretreatment Lignocellulosic biomass SACCHARIFICATION 

分 类 号：TQ281[化学工程—有机化工] TK6[动力工程及工程热物理—生物能]