title: Physicochemical pretreatments and hydrolysis of furfural residues via carbon-based sulfonated solid acid.
abstract: Potential commercial physicochemical pretreatment methods, NaOH/microwave and NaOH/ultrasound were developed, and the carbon-based sulfonated solid acid catalysts were prepared for furfural residues conversion into reducing sugars. After the two optimum pretreatments, both the content of cellulose increased (74.03%, 72.28%, respectively) and the content of hemicellulose (94.11%, 94.17% of removal rate, respectively) and lignin (91.75%, 92.09% of removal rate, respectively) decreased in furfural residues. The reducing sugar yields of furfural residues with the two physicochemical pretreatments on coal tar-based solid acid reached 33.94% and 33.13%, respectively, higher than that pretreated via NaOH alone (27%) and comparable to that pretreated via NaOH/H2O2 (35.67%). The XRD patterns, IR spectra and SEM images show microwave and ultrasound improve the pretreatment effect. The results demonstrate the carbon-based sulfonated solid acids and the physicochemical pretreatments are green, effective, low-cost for furfural residues conversion.
authors: State Key Laboratory Cultivation Base of Natural Gas Conversion, College of Chemistry, Ningxia University, Yinchuan 750021, China. Electronic address: bjma@nxu.edu.cn.
authors: Bao Jun
authors: BJ
authors: Ma
authors: State Key Laboratory Cultivation Base of Natural Gas Conversion, College of Chemistry, Ningxia University, Yinchuan 750021, China.
authors: Yuan
authors: Y
authors: Sun
authors: State Key Laboratory Cultivation Base of Natural Gas Conversion, College of Chemistry, Ningxia University, Yinchuan 750021, China.
authors: Ke Ying
authors: KY
authors: Lin
authors: State Key Laboratory Cultivation Base of Natural Gas Conversion, College of Chemistry, Ningxia University, Yinchuan 750021, China.
authors: Bing
authors: B
authors: Li
authors: State Key Laboratory Cultivation Base of Natural Gas Conversion, College of Chemistry, Ningxia University, Yinchuan 750021, China. Electronic address: liuwy@nxu.edu.cn.
authors: Wan Yi
authors: WY
authors: Liu
mesh_terms: D002244:Carbon / Q000737:chemistry*; D002384:Catalysis; D055598:Chemical Phenomena; D005662:Furaldehyde / Q000737:chemistry*; D006868:Hydrolysis; D008872:Microwaves; D012972:Sodium Hydroxide / Q000737:chemistry*; D013451:Sulfonic Acids / Q000737:chemistry*; D013696:Temperature; D013997:Time Factors; D014465:Ultrasonics
chemical_list: D013451:Sulfonic Acids; D012972:Sodium Hydroxide; D002244:Carbon; D005662:Furaldehyde
keywords: Furfural residues; Physicochemical pretreatment; Reducing sugars; Solid acid