Influence of ultrasonic pretreatment on the yield of bio-oil prepared by thermo-chemical conversion of rice husk in hot-compressed water.
The aim of the current study is to investigate the feasibility of thermo-chemical conversion of rice husk in hot-compressed water via ultrasonic pretreatment to increase the bio-oil yield. The results show that ultrasonic pretreatment remarkably changes the structures of the rice husk, such as enhancing swelling and surface area, eroding lignin structure, and resulting in more exposure of the cellulose and hemicellulose. The highest bio-oil yield of 42.8% was obtained from the thermo-chemical conversion at 300 °C and 0 min of the residence time for the 1 h pretreated rice husk. GC-MS analysis indicates that the relative contents of phenols, 5-Hydroxymethylfurfural, and lactic acid are higher in bio-oils obtained from the pretreated rice husks than that from the raw rice husk.
School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dong Chuan Road, Shanghai 200240, China.
Wen
W
Shi
School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dong Chuan Road, Shanghai 200240, China.
Jingfu
J
Jia
School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dong Chuan Road, Shanghai 200240, China.
Yahui
Y
Gao
School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dong Chuan Road, Shanghai 200240, China. Electronic address: ypzhao@sjtu.edu.cn.
Yaping
Y
Zhao
D056804:Biofuels; D018533:Biomass; D002482:Cellulose / Q000737:chemistry; D005662:Furaldehyde / Q000031:analogs & derivatives* / Q000737:chemistry; D008401:Gas Chromatography-Mass Spectrometry; D006358:Hot Temperature; D019344:Lactic Acid / Q000737:chemistry*; D008031:Lignin / Q000737:chemistry*; D009821:Oils; D012275:Oryza / Q000378:metabolism*; D011134:Polysaccharides / Q000737:chemistry; D012037:Refuse Disposal / Q000379:methods; D013499:Surface Properties; D013696:Temperature; D013997:Time Factors; D014465:Ultrasonics; D014867:Water / Q000737:chemistry
D056804:Biofuels; D009821:Oils; D011134:Polysaccharides; D014867:Water; D019344:Lactic Acid; C008046:5-hydroxymethylfurfural; C007916:hemicellulose; D002482:Cellulose; D008031:Lignin; D005662:Furaldehyde
Bio-oil; Hot-compressed water; Rice husk; Thermo-chemical conversion; Ultrasonic pretreatment