Kinetics of oxidation of a hemicellulose model compound by chlorine dioxide in bleaching

被引：0

作者：

Yao S. ^{[1
,2
]}

Feng C. ^{[1
,2
]}

Wang C. ^{[1
,2
]}

Liu B. ^{[1
,2
]}

Huang L. ^{[1
,2
]}

Nie S. ^{[1
,2
]}

Zhang T. ^{[3
]}

Qin C. ^{[1
,2
]}

机构：

[1] Department of Light Industrial and Food Engineering, Guangxi University, Nanning

[2] Guangxi Key Laboratory of Clean Pulp and Papermaking and Pollution Control, Nanning

[3] St. Louis University High School, St. Louis, 63110, MO

来源：

BioResources | 2019年 / 13卷 / 03期

基金：

中国国家自然科学基金;

关键词：

AOX; Chlorine dioxide; GC-MS; Hemicellulose model compounds; Oxidation kinetics;

D O I：

10.15376/biores.13.3.5670-5683

中图分类号：

学科分类号：

摘要：

Kinetics of the oxidation of D-xylose, a hemicellulose model compound, by chlorine dioxide was studied under simulated bleaching conditions. The final reaction product, chloroacetic acid, which is a type of adsorbable organic halogen (AOX), was detected by gas chromatography-mass spectrometer (GC-MS). The kinetic equation was expressed as dW/dt = 2.36e-560/T[H+]0.05[ClO2]0.11X0.92. The reaction exhibited first-order kinetics, with a good agreement between the experimental and modelling data. The reaction activation energy was 4.66 kJ.mol-1. Thus, the process is not controlled by a chemical reaction, but rather, it is controlled by hemicellulose properties. These results might have potential for resolving the major problems of environmental pollution in elemental chlorine-free (ECF) bleaching of pulp. © 2018, BioResources.

引用

页码：5670 / 5683

页数：13

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