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
收藏
页码:5670 / 5683
页数:14
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