Improvement of the energy efficiency in the decomposition of dilute trichloroethylene by the barrier discharge plasma process
Improvement of the energy efficiency in the decomposition of dilute trichloroethylene by the barrier discharge plasma process
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DOI：
10.1109/tia.2005.855046
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发表时间：
2005-09
影响因子：
4.4
通讯作者：
SangBo Han;T. Oda;R. Ono
中科院分区：
文献类型：
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作者：
SangBo Han;T. Oda;R. Ono
为了提高非热等离子体工艺去除稀三氯乙烯（TCE）的能效，对介质阻挡放电反应器进行了实验研究。通过在介质阻挡放电反应器下游结合二氧化锰催化剂进行了探究。在气体流速为2升/分钟、稀三氯乙烯浓度为250 ppm时，介质阻挡放电反应器的分解效率约为83%。在比能量为40焦/升时，经过二氧化锰后的分解效率提高到约99%。然而，通过气相色谱 - 质谱法或傅里叶变换红外光谱测量检测到了其他副产物，包括臭氧以及二氯乙酸（DCAC）和三氯乙酸（TCAA）等氧化副产物。DCAC在等离子体反应器中产生，而TCAA是在臭氧分解过程中在催化剂处产生的。在直接工艺中，经过催化剂后一氧化碳/二氧化碳的产率增加了约一倍。在这种介质阻挡放电工艺中，一氧化氮（NO）、二氧化氮（NO₂）和一氧化二氮（N₂O）等氮氧化物的产生量并不多。介质阻挡放电工艺与二氧化锰相结合被认为是提高能效的一种非常理想的方法。
In order to improve the energy efficiency in the dilute trichloroethylene (TCE) removal by the nonthermal plasma process, the barrier discharge reactor was studied experimentally. It is investigated by combining it with catalyst of manganese dioxide at the downstream of the barrier discharge reactor. Decomposition efficiency by the barrier discharge reactor was about 83% at the gas flow rate 2 L/min, where the dilute TCE concentration is 250 ppm. Decomposition efficiency with passing through manganese dioxide was improved about 99% at the specific energy of 40 J/L. However, other by-products including ozone and oxidation by-products such as DCAC and TCAA were detected by the gas chromatograph mass spectrometry or the Fourier transform infrared spectroscope measurement. DCAC is generated at the plasma reactor, but TCAA is generated at catalyst during ozone decomposition. CO/sub x/ yield increased about twice with passing through catalyst in the Direct Process. Nitric oxides such as NO, NO/sub 2/, and N/sub 2/O did not generate so much in this barrier discharge process. The dielectric barrier discharge process combined with manganese dioxide is considered as a very desirable way to improve the energy efficiency.