| 真空紫外光臭氧降解偏二甲肼的研究 |
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| 引用本文： | 王晓晨,张彭义.真空紫外光臭氧降解偏二甲肼的研究[J].环境工程学报,2009,3(1):57-61. |
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| 作者姓名： | 王晓晨 张彭义 |
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| 作者单位： | 清华大学环境科学与工程系,北京,100084 |
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| 基金项目： | 国家“973”重点基础研究发展规划项目（2007CB613303） |
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| 摘 要： | 研究比较了臭氧氧化（O3）、紫外臭氧（O3/UV）和真空紫外臭氧（O3/VUV）对推进剂——偏二甲肼的处理效果，O3/VUV最为有效，反应速率常数分别比O3/UV和O3高39.8%和65.6%，中间产物——甲醛去除得更迅速，反应50 min即无法检出。初始pH 9时，O3/VUV降解偏二甲肼的速率最快，达到0.4461 min-1；反应速率常数随臭氧投加量的增加而线性增大；随偏二甲肼初始浓度从100 mg/L增加到2 000 mg/L，反应动力学由一级转为零级。碳酸盐浓度在0～2 mmol/L范围内对O3/VUV降解偏二甲肼没有明显的抑制作用。偏二甲肼的无机氮产物以氨离子为主，无机氮只占总氮的40%～60%，说明仍有相当比例的氮以有机氮形式存在。
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| 关 键 词： | 偏二甲肼 真空紫外 臭氧 甲醛 |
Degradation of unsymmetrical dimethylhydrazine by O3/VUV |
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| Wang Xiaochen and Zhang Pengyi.Degradation of unsymmetrical dimethylhydrazine by O3/VUV[J].Techniques and Equipment for Environmental Pollution Control,2009,3(1):57-61. |
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| Authors: | Wang Xiaochen and Zhang Pengyi |
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| Institution: | Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084 and Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084 |
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| Abstract: | The widely used propellant unsymmetrical dimethylhydrazine(UDMH) was treated with three ozone-based advanced oxidation processes(AOPs),i.e.O3,O3/UV and O3/VUV.Among them,the most efficient process was O3/VUV,and its rate constant was 39.8% and 65.6% higher than O3/UV and O3 respectively.Meanwhile,the degradation intermediate i.e.formaldehyde could also be removed fastest in the O3/VUV process and its concentration was lowered to be undetectable within 50 min.The dependence of reaction efficiency on several ... |
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