title: Selective hydrolysis of hemicellulose from wheat straw by a nanoscale solid acid catalyst.
abstract: A nanoscale catalyst, solid acid SO4(2-)/Fe2O3 with both Lewis and Brønsted acidity was found to effectively hydrolyze hemicellulose while keeping cellulose and lignin inactive, and selective hydrolysis of hemicellulose from wheat straw by this catalyst was also confirmed. The factors that significantly affected hydrolysis process were investigated with response surface methodology, and the optimum conditions for time, temperature, and ratio of wheat straw to catalyst (w/w) were calculated to be 4.10h, 141.97°C, and 1.95:1, respectively. A maximum hemicellulose hydrolysis yield of 63.5% from wheat straw could be obtained under these conditions. In addition, the catalyst could be recycled six times with high activity remaining.
authors.affiliation: College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211800, PR China.
authors.forename: Chao
authors.initials: C
authors.lastname: Zhong
authors.affiliation: College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211800, PR China.
authors.forename: Chunming
authors.initials: C
authors.lastname: Wang
authors.affiliation: College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211800, PR China.
authors.forename: Fan
authors.initials: F
authors.lastname: Huang
authors.affiliation: College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211800, PR China.
authors.forename: Fengxue
authors.initials: F
authors.lastname: Wang
authors.affiliation: College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211800, PR China. Electronic address: hhjia@njtech.edu.cn.
authors.forename: Honghua
authors.initials: H
authors.lastname: Jia
authors.affiliation: College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211800, PR China.
authors.forename: Hua
authors.initials: H
authors.lastname: Zhou
authors.affiliation: College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211800, PR China.
authors.forename: Ping
authors.initials: P
authors.lastname: Wei
mesh_terms: D002384:Catalysis; D006868:Hydrolysis; D053758:Nanoparticles / Q000737:chemistry / Q000648:ultrastructure; D011134:Polysaccharides / Q000737:chemistry*; D059027:Recycling; D013464:Sulfuric Acids / Q000737:chemistry*; D013696:Temperature; D014908:Triticum / Q000737:chemistry*; D014866:Waste Products; D014961:X-Ray Diffraction
chemical_list: D011134:Polysaccharides; D013464:Sulfuric Acids; D014866:Waste Products; C007916:hemicellulose; C033158:sulfuric acid
keywords: Nanoscale; Recycling; Selective hydrolysis; Solid acid; Wheat straw hemicellulose