title: Effect of shortening kraft pulping integrated with extended oxygen delignification on biorefinery process performance of eucalyptus.
abstract: The aim of this work was to study the impact of shortening kraft pulping (KP) process integrated with extended oxygen delignification (OD) on the biorefinery process performance of eucalyptus. Data showed that using kraft pulps with high kappa number could improve the delignification efficiency of OD, reduce hexenuronic acid formation in kraft pulps. Pulp viscosity for a target kappa number of ∼10 was comparable to that obtained from conventional KP and OD process. The energy and alkali consumption in the integrated biorefinery process could be optimized when using a KP pulp with kappa number of ∼27. The process could minimize the overall methanol formation, but greater amounts of carbonate and oxalate were formed. The information from this study will be helpful to the future implementation of short-time KP integrated with extended OD process in actual pulp mill applications for biorefinery, aiming at further improvement in the biorefinery effectiveness of hardwood.
authors.affiliation: State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou, Guangdong 510640, China.
authors.forename: Jing
authors.initials: J
authors.lastname: Li
authors.affiliation: State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou, Guangdong 510640, China.
authors.forename: Chunyun
authors.initials: C
authors.lastname: Zhang
authors.affiliation: College of Material Engineering, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China.
authors.forename: Huichao
authors.initials: H
authors.lastname: Hu
authors.affiliation: State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou, Guangdong 510640, China. Electronic address: xschai@scut.edu.cn.
authors.forename: Xin-Sheng
authors.initials: XS
authors.lastname: Chai
mesh_terms: D000468:Alkalies / Q000494:pharmacology; D001709:Biotechnology / Q000379:methods*; D002254:Carbonates / Q000378:metabolism; D005052:Eucalyptus / Q000187:drug effects*; D006603:Hexuronic Acids / Q000737:chemistry; D008031:Lignin / Q000494:pharmacology*; D000432:Methanol / Q000378:metabolism; D010070:Oxalates / Q000378:metabolism; D010100:Oxygen / Q000494:pharmacology*; D010209:Paper; D014783:Viscosity
chemical_list: D000468:Alkalies; D002254:Carbonates; D006603:Hexuronic Acids; D010070:Oxalates; C095263:hexenuronic acid; D008031:Lignin; D010100:Oxygen; D000432:Methanol
keywords: Biorefinery; High lignin content; Kraft pulp; Oxygen delignification