Enhanced Bio-oil Yield from Liquefaction of Cornstalk in Sub- and Supercritical Ethanol by Acid-Chlorite Pretreatment

被引：28
|
作者：
Liu, Hua-Min [1 ]
Feng, Bing [2 ]
Sun, Run-Cang [1 ,3 ]
机构：
[1] S China Univ Technol, State Key Lab Pulp & Paper Engn, Guangzhou 510640, Peoples R China
[2] S China Univ Technol, Sch Chem & Chem Engn, Guangzhou 510640, Peoples R China
[3] Beijing Forestry Univ, Inst Biomass Chem & Technol, Beijing 100083, Peoples R China
来源：
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 2011年 / 50卷 / 19期
基金：
中国国家自然科学基金;
关键词：
HOT-COMPRESSED WATER; BIOETHANOL PRODUCTION; BIOMASS CONVERSION; CORN STOVER; CHEMISTRY; PRODUCTS; FEATURES; SAWDUST; SYNGAS; IMPACT;
D O I：
10.1021/ie2014197
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
Acid chlorite pretreatment was developed to enhance bio-oil yield and decrease the optimum reaction temperature of cornstalk liquefaction in a stainless steel reactor (0.5 L) at temperatures of 200-340 degrees C. The effects of liquefaction temperature and ethanol amount on the bio-oil yield from liquefaction of cornstalk before and after pretreatment were investigated. The results showed that the pretreatment could markedly enhance the bio-oil yield and decrease the optimum temperature. The highest bio-oil yield (31.4%) was obtained from the liquefaction at the reaction temperature of 260 degrees C from the 1.5 h pretreated cornstalk. Unpretreated and pretreated cornstalks differed in chemical components, in which the add chlorite pretreatment increased carbohydrate content and removed some amount of lignin. Scanning electron microscopy showed that the pretreated cornstalks had extensive anomalous porosity and lamellar structures. X-ray analysis showed that this pretreatment process was unable to break apart inter- and intrachain hydrogen bonding in cellulose fibrils. GC/MS analysis showed that the pretreatment had an important effect on the formation of various compounds in the bio-oil.
引用
收藏
页码：10928 / 10935
页数：8
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