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.
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页码：5670 / 5683
页数：13
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