Heteropoly acid catalytic treatment for reactivity enhancement and viscosity control of dissolving pulp. (April 2018)

• Record Type: Journal Article
• Authors: Wang, Xinqi; Duan, Chao; Zhao, Chengxin; Meng, Jingru; Qin, Xiaoyu; Xu, Yongjian; Ni, Yonghao
• Is Part Of: Bioresource technology. Volume 253(2018)
• Page Start: 182
• Page End: 187
• Publication Date: 2018-04
• Subjects: Dissolving pulp -- Phosphotungstic acid -- Catalytic treatment -- Fock reactivity -- Viscosity; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2018.01.022
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: A sustainable process to improve reactivity of dissolving pulp was proposed. The process consists of HPW catalytic treatment and recycling/reuse. HPW treatment effectively increased the pulp reactivity. The recycled HPW maintained high catalytic activity after six cycles. Abstract: The reactivity enhancement and viscosity control are of practical importance during the manufacture of high-quality cellulose (also known as dissolving pulp). In the study, the concept of using phosphotungstic acid (HPW) for this purpose was demonstrated. The Fock reactivity of resultant pulp increased from 49.1% to 74.1% after the HPW catalytic treatment at a dosage of 86.4 mg HPW/g odp. The improved results can be attributed to the increased fiber accessibility, thanks to the favorable fiber morphologic changes, such as increased pore volume/size, water retention value and specific surface area. HPW can be readily recycled/reused by evaporating method, where maintaining 87.1% catalytic activity after six recycle times. The HPW catalytic treatment concept may provide a green alternative for the manufacture of high-quality dissolving pulp.