Destruction of VOCs by combination of corona discharge and catalysis techniques |
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引用本文: | Muhammad Arif Malik,Jiang Xuan zhen.Destruction of VOCs by combination of corona discharge and catalysis techniques[J].环境科学学报(英文版),1998,10(3):276-281. |
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作者姓名: | Muhammad Arif Malik Jiang Xuan zhen |
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作者单位: | Department of Chemistry;University of Zhejiang;Hangzhou 310027;China,Department of Chemistry;University of Zhejiang;Hangzhou 310027;China |
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基金项目: | the National Natural Science Foundation of China (No. 29576261)?????? |
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摘 要: | The catalytic effect of alumina on the destruction of toluene, benzene, acetone and methanol, in DC pulsed corona discharge reactor was studied. In the presence of alumina the inlet concentration of the VOCs was varied from ~5×10-6mol/L to ~80×10-6mol/L, and their decomposition efficiency (conversion %) was found to be 99%—80% for toluene, 99%—97% for benzene, 95%—92% for acetone, and 72%—85% for methanol. Corresponding decomposition in the absence of alumina was 90%—38% for toluene, 89%—57% for benzene, 42%—30% for acetone, and 47%—19% for methanol. Feed gas flow rate was 400 cm3/min and power reading from DC source was 7.4 W in all of the experiments. Alumina also shifted the CO/CO2 ratio in the by products in favor of CO2. Ozone concentration at the reactor outlet was higher in the presence of alumina. Enhancement in VOCs decomposition by alumina was explained on the basis of higher concentration of ozone and its precursor atomic oxygen O] . Decomposition efficiency (conversion %) for individual compounds was found to be inversely proportional to the ionization potential of the compound, under identical conditions. Double DC high voltage sources pulse generator was tested and found to improve VOCs decomposition compared with the conventional single DC high voltage source.
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关 键 词: | corona discharge catalysis techniques VOCs decomposition efficiency |
收稿时间: | 1997/10/17 0:00:00 |
修稿时间: | 1997/12/1 0:00:00 |
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