热活化过硫酸盐氧化去除木质素降解产物

doi:10.11949/j.issn.0438-1157.20151816

化工学报 ›› 2016, Vol. 67 ›› Issue (6): 2618-2624.DOI: 10.11949/j.issn.0438-1157.20151816

热活化过硫酸盐氧化去除木质素降解产物

荣亚运¹, 师林丽¹, 张晨¹, 邹丽花¹, 徐颖¹, 朱均均^1,2, 陈丽玮³, 徐勇^1,2, 勇强¹, 余世袁^1,2

1. 南京林业大学化学工程学院, 江苏南京 210037;
2. 江苏省生物质绿色燃料与化学品重点实验室, 江苏南京 210037;
3. 南京林业大学生物与环境学院, 江苏南京 210037

收稿日期:2015-12-02 修回日期:2016-01-25 出版日期:2016-06-05 发布日期:2016-06-05
通讯作者: 朱均均
基金资助:
"十二五"国家科技支撑计划项目(2015BAD15B09);江苏省普通高校研究生科研创新计划资助项目(SJLX15_0405);江苏高校优势学科建设工程资助项目。

Oxidation of lignin-degradation products by heat-activated persulfate

RONG Yayun¹, SHI Linli¹, ZHANG Chen¹, ZOU Lihua¹, XU Ying¹, ZHU Junjun^1,2, CHEN Liwei³, XU Yong^1,2, YONG Qiang¹, YU Shiyuan^1,2

1. College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, Jiangsu, China;
2. Jiangsu Key Laboratory of Biomass-based Green Fuel and Chemicals, Nanjing 210037, Jiangsu, China;
3. College of Biology and the Environment, Nanjing Forestry University, Nanjing 210037, Jiangsu, China

Received:2015-12-02 Revised:2016-01-25 Online:2016-06-05 Published:2016-06-05
Supported by:
supported by the National Key Technology Research and Development Program of China (2015BAD15B09), the Graduate Research and Innovation Plan of Jiangsu Province (SJLX15_0405) and the Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD).

摘要/Abstract

摘要：

针对生物乙醇生产过程中木质素降解产物对乙醇发酵的抑制作用,选取6种典型木质素降解产物(香草醛、紫丁香醛、4-羟基苯甲醛、香草酸、紫丁香酸和4-羟基苯甲酸)为研究对象,采用新型脱毒技术-热活化过硫酸盐高级氧化技术氧化脱除,研究了氧化去除条件及其氧化机理。结果表明,以0.1g·L^-1的香草醛为代表物质,其最优氧化条件为:pH6.0,温度80℃,过硫酸盐浓度1.5g·L^-1。在此优化条件的基础上,研究其他5种典型木质素降解产物的氧化效果。结果表明热活化过硫酸盐氧化木质素降解产物的效果显著,香草醛、4-羟基苯甲醛、香草酸、4-羟基苯甲酸和紫丁香酸的去除率在1h内均达到100%,紫丁香醛的去除率在2h内也达到100%。热活化过硫酸盐氧化机理主要是通过投加自由基捕获剂甲醇和叔丁醇间接判定在反应过程中的主要活性物种,结果表明在反应中起到主要作用的活性物种是硫酸根自由基。因此,热活化过硫酸盐可以很好地氧化去除木质素降解产物。

关键词: 生物质, 生物燃料, 热活化, 过硫酸盐, 木质素降解产物, 高级氧化技术

Abstract:

Aiming at the effect of lignin-degradation products on ethanol fermentation during the bioethanol production process, six kinds of typical lignin-degradation products (vanillin, syringaldehyde, 4-hydroxybenzaldehyde, vanillic acid, syringic acid and 4-hydroxybenzoic acid) were selected to oxidative removal by a new detoxification technology-advanced oxidation process of heat-activated persulfate. The oxidation removal conditions and its oxidation mechanism were also investigated. The results indicated that the optimal oxidation conditions were pH 6.0, 80℃, and the persulfate concentration of 1.5 g·L^-1 based on 0.1 g·L^-1 vanillin. On the basis of the optimized conditions, the oxidation effect of other five of typical lignin-degradation products was studied. The results showed that the effects of oxidation removal were obvious. The removal ratio of vanillin, 4-hydroxybenzaldehyde, vanillic acid and syringic acid reached to 100% within 1 h, while that of syringaldehyde reached to 100% within 2 h. The study of oxidative mechanism was to indirectly decide which the main active species was in the reaction process by the addition of radical scavengers of methanol and t-butanol. The results showed that the main active species were sulfate radicals. Therefore, using heat-activated persulfate is a good way for oxidative removal of the lignin-degradation products.

Key words: biomass, biofuel, heat activation, persulfate, lignin-degradation products, advanced oxidation process

中图分类号:

TQ353

荣亚运, 师林丽, 张晨, 邹丽花, 徐颖, 朱均均, 陈丽玮, 徐勇, 勇强, 余世袁. 热活化过硫酸盐氧化去除木质素降解产物[J]. 化工学报, 2016, 67(6): 2618-2624.

RONG Yayun, SHI Linli, ZHANG Chen, ZOU Lihua, XU Ying, ZHU Junjun, CHEN Liwei, XU Yong, YONG Qiang, YU Shiyuan. Oxidation of lignin-degradation products by heat-activated persulfate[J]. CIESC Journal, 2016, 67(6): 2618-2624.

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热活化过硫酸盐氧化去除木质素降解产物

Oxidation of lignin-degradation products by heat-activated persulfate

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