Kinetics of Oxidation of a Hemicellulose Model Compound by Chlorine Dioxide in Bleaching

被引：0

作者：

Yao, Shuangquan ^{[1
,2
]}

Feng, Chengqi ^{[1
,2
]}

Wang, Cheng ^{[1
,2
]}

Liu, Baojie ^{[1
,2
]}

Huang, Lingzhi ^{[1
,2
]}

Nie, Shuangxi ^{[1
,2
]}

Zhang, Tianyi ^{[3
]}

Qin, Chengrong ^{[1
,2
]}

机构：

[1] Guangxi Univ, Dept Light Ind & Food Engn, Nanning 530004, Peoples R China

[2] Guangxi Key Lab Clean Pulp & Papermaking & Pollut, Nanning 530004, Peoples R China

[3] St Louis Univ, High Sch, St Louis, MO 63110 USA

来源：

BIORESOURCES | 2018年 / 13卷 / 03期

基金：

中国国家自然科学基金;

关键词：

AOX; Hemicellulose model compounds; GC-MS; Oxidation kinetics; Chlorine dioxide; BAGASSE PULP; CELLULOSE NANOFIBRILS; MILL EFFLUENT; AOX FORMATION; PILOT-SCALE; KRAFT PULP; PRETREATMENT; REDUCTION; XYLANASE; EXTRACTION;

D O I：

暂无

中图分类号：

TB3 [工程材料学]; TS [轻工业、手工业、生活服务业];

学科分类号：

0805 ; 080502 ; 0822 ;

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]X-0.11(0.92). 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.

引用

页码：5670 / 5683

页数：14

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