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Study on Kinetics and Enzymatic Hydrolysis Properties of Cornstalk Pretreated with p-TsOH
Received:April 26, 2022  
DOI：10.11980/j.issn.0254-508X.2022.07.002
Key Words:p-TsOH  cornstalk  component separation  kinetics  enzymatic hydrolysis
Fund Project:广州市科技计划项目（201707020011）；广东省科学基金培育植物纤维高效利用国家工程研究中心（2017B090903003）；制浆造纸工程国家重点实验室（201831）。
Author NameAffiliationPostcode
CHEN Li State Key Lab of Pulp and Paper Engineering， South China University of Technology， Guangzhou，Guangdong Province， 510641 510641
KUANG Yishan School of Chemistry and Chemical Engineering， Changsha University of Science and Technology， Changsha， Hu’nan Province， 410114 410114
ZHANG Xi State Key Lab of Pulp and Paper Engineering， South China University of Technology， Guangzhou，Guangdong Province， 510641
Ji’nan Shengquan Group Co.， Ltd.， Ji’nan， Shandong Province， 250204 		250204
LI Jun* State Key Lab of Pulp and Paper Engineering， South China University of Technology， Guangzhou，Guangdong Province， 510641 510641
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Abstract:In this study， p-toluene sulphonic acid （p-TsOH） was employed to pretreat cornstalk， and the effects of three pretreatment parameters （concentrations of p-TsOH， hydrolysis temperature， and hydrolysis time） on the separation of cellulose， hemicellulose， and lignin were investigated. The kinetic models of lignin and hemicellulose removal were obtained by using the two-phase model， and the enzymatic hydrolysis properties of the treated residue were studied. The results showed that the p-TsOH pretreated cornstalk could quickly remove lignin and hemicellulose under mild conditions but had little effect on the degradation of cellulose. The apparent activation energies of the lignin and hemicellulose removal reactions were 66.5 kJ/mol and 50.5 kJ/mol， respectively. The tenacious structure of biomass fibers was destroyed and the surface lignin content was decreased by the p-TsOH pretreatment， which improved the enzymatic yield of treated cornstalk. After pretreatment with p-TsOH concentration of 50%， hydrolysis temperature of 95℃ and hydrolysis time of 40 min， the enzymatic hydrolysis yield of the residue was 72.9%.
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