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Chemistry and Industry of Forest Products ›› 2022, Vol. 42 ›› Issue (1): 1-9.doi: 10.3969/j.issn.0253-2417.2022.01.001

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Directional Decomposition of Bamboo Powder in Bio-based Polar Aprotic Solvent/Aqueous p-Toluenesulfonic Acid Coupling Systems

Xiaoyan YIN1,2, Tingting CAI1, Chao LIU1, Jianchun JIANG1,2, Kui WANG1,2,*()   

  1. 1. Institute of Chemical Industry of Forest Products, CAF; National Engineering Lab. for Biomass Chemical Utilization; Key Lab. of Chemical Engineering of Forest Products, National Forestry and Grassland Administration; Key Lab. of Biomass Energy and Material, Jiangsu Province, Nanjing 210042, China
    2. Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, China
  • Received:2021-12-01 Online:2022-02-28 Published:2022-03-11
  • Contact: Kui WANG E-mail:wangkui@icifp.cn


The effects of pretreatment with γ-valerolactone/p-toluenesulfonic aci aqueous solution coupling systemGVL/TsOH aq) an Cyrene/p-toluenesulfonic aci aqueous solution coupling systemCyrene/TsOH aq) on the chemical composition an enzymatic hyrolysis of maso bamboo were stuie. The results showe that the hemicellulose separation rates (SH) an lignin separation rate (SL) in GVL/TsOH aq system with 75 g/L TsOH an the solvent volume ratio of 4:1 were 98.5% an 98.4%, respectively, after pretreatment at 130℃ for 60 min, an the cellulose retention rate (RC) was 91.5%. In contrast, the Cyrene/TsOH aq system with 30 g/L TsOH an the solvent volume ratio of 0.8:1 was pretreate maso bamboo at 120℃ for 60 min, the RC was 87.3%, while the SH an SL were 85.5% an 79.4%, respectively. Characterization results of soli samples after pretreatment showe that after pretreatment with GVL/TsOH aq, the ense structure of lignocellulose of the samples was effectively estroye, an most of the amorphous hemicellulose an lignin were separate, with a crystallinity of 68.27%. Besies, the structure was closer to microcrystalline cellulose, an more free hyroxyl groups were expose, which was conucive to the subsequent enzymatic hyrolysis an saccharification process. The enzymatic hyrolysis results emonstrate that the glucose yiel of the soli sample obtaine by GVL/TsOH aq pretreatment (773 mg/g) was significantly higher than that of the sample obtaine by Cyrene/TsOH aq (306 mg/g), which was 19.3 times of that of bamboo. The two solvent systems coul be effectively recycle, an the separation rate of lignin an the retention rate of cellulose in GVL/TsOH aq system coul reach 90.3% an 91.5% respectively, an 94.8% of solvent coul be recovere after three cycles.

Key words: maso bamboo, γ-verolactone, Cyrene, p-toluenesulfonic acid, pretreatment

CLC Number: