Black liquor-derived carbonaceous solid acid catalyst for the hydrolysis of pretreated rice straw in ionic liquid.
Lignin-containing black liquor from pretreatment of rice straw by KOH aqueous solution was applied to prepare a carbonaceous solid acid catalyst, in which KOH played dual roles of extracting lignin from rice straw and developing porosity of the carbon material as an activation agent. The synthesized black liquor-derived carbon material was applied in catalytic hydrolysis of the residue solid from the pretreatment of rice straw, which was mainly composed of cellulose and hemicellulose, and showed excellent activity for the production of total reducing sugars (TRS) in ionic liquid, 1-butyl-3-methyl imidazolium chloride. The highest TRS yield of 63.4% was achieved at 140°C for 120min, which was much higher than that obtained from crude rice straw under the same reaction conditions (36.6% TRS yield). Overall, this study provides a renewable strategy for the utilization of all components of lignocellulosic biomass.
Agro-Environmental Protection Institute, Chinese Academy of Agricultural Sciences, No. 31, Fukang Road, Nankai District, Tianjin 300191, China; College of Environmental Science and Engineering, Nankai University, No. 94, Weijin Road, Nankai District, Tianjin 300071, China.
Chenxi
C
Bai
Agro-Environmental Protection Institute, Chinese Academy of Agricultural Sciences, No. 31, Fukang Road, Nankai District, Tianjin 300191, China; College of Environmental Science and Engineering, Nankai University, No. 94, Weijin Road, Nankai District, Tianjin 300071, China.
Linfeng
L
Zhu
Agro-Environmental Protection Institute, Chinese Academy of Agricultural Sciences, No. 31, Fukang Road, Nankai District, Tianjin 300191, China.
Feng
F
Shen
Agro-Environmental Protection Institute, Chinese Academy of Agricultural Sciences, No. 31, Fukang Road, Nankai District, Tianjin 300191, China. Electronic address: qixinhua@nankai.edu.cn.
Xinhua
X
Qi
D002241:Carbohydrates / Q000032:analysis; D002384:Catalysis / Q000187:drug effects; D006851:Hydrochloric Acid / Q000494:pharmacology*; D006868:Hydrolysis / Q000187:drug effects; D052578:Ionic Liquids / Q000494:pharmacology*; D012275:Oryza / Q000737:chemistry* / Q000187:drug effects; D059027:Recycling; D013696:Temperature; D013997:Time Factors; D014865:Waste Disposal, Fluid
D002241:Carbohydrates; D052578:Ionic Liquids; D006851:Hydrochloric Acid
Alkali pretreatment; Biomass; Black liquor; Ionic liquid; Lignin