Enhancing Kraft based dissolving pulp production by integrating green liquor neutralization

被引：7

作者：

Bi, Ran ^{[1
]}

Khatri, Vinay ^{[1
]}

Chandra, Richard ^{[2
]}

Takada, Masatsugu ^{[1
]}

Figueroa, Daniela Vargas ^{[1
]}

Zhou, Hao ^{[1
]}

Wu, Jie ^{[1
]}

Charron, Daniel ^{[3
]}

Saddler, Jack ^{[1
]}

机构：

[1] Univ British Columbia, Dept Wood Sci, Forest Prod Biotechnol Bioenergy Grp, Vancouver, BC V6T 1Z4, Canada

[2] Trinity Western Univ, 7600 Glover Rd, Langley, BC V2Y 1Y1, Canada

[3] Fortress Specialty Cellulose Inc, Thurso, PQ, Canada

来源：

CARBOHYDRATE POLYMER TECHNOLOGIES AND APPLICATIONS | 2021年 / 2卷

基金：

加拿大自然科学与工程研究理事会;

关键词：

Pre-hydrolysis and Kraft pulping process; Green liquor; Yield; Surface characterization; Carbohydrate-binding modules; Reactivity; ENZYMATIC-HYDROLYSIS; CELLULOSE; ACCESSIBILITY; REACTIVITY; VISCOSE; WOOD;

D O I：

10.1016/j.carpta.2021.100034

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

A pre-hydrolysis Kraft pulping (PHK) process that was used to make dissolving pulp was enhanced by replacing conventional white liquor (WL) neutralization with green liquor (GL) neutralization prior to Kraft pulping. This resulted in a 10% increase in dissolving pulp production, and significant chemical savings, without compromising pulp reactivity. When the possible influence of the alkaline charge on fibre properties was assessed using methods such as viscosity, Simon's stain, Size Exclusion Chromatography (SEC) and SEM, it was apparent that stronger alkaline treatments (WL) resulted increased cellulose degradation, a lower cellulose DP and a slightly larger surface area. When these methods were complemented with an assay based on the selective binding of sitespecific carbohydrate-binding modules (CBMs), it was apparent that green liquor (GL) neutralization resulted in an increase in less-ordered cellulose being exposed. This likely contributed to its higher reactivity despite its lower overall surface area.

引用

页数：9

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