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High-temperature simultaneous removal of acetaldehyde and ammonia gases using corona discharge

机译：使用电晕放电高温同时去除乙醛和氨气

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The electrostatic precipitator (ESP) is the most prevalent application for corona as ion source. ESP is widely used in industrial dust collection and home ventilation systems for cleaning gas streams. However, ESP has not been used to remove gas pollutants from a gas stream. Electron attachment is one of the promising techniques for gas purification. Electron attachment reactions occur when low-energy electrons generated in a corona-discharge reactor are captured by electronegative impurities such as acetaldehyde and fine panicles to produce negative ions and charged particles. The negative ions and charged particles drift in the electric field to the anode (reactor wall) and are removed by deposition there. Moreover, O~-, O radical, ozone, and OH~- are also generated when the carrier gas is humid air. These anions and radicals also contribute to the removal efficiency. Though acetaldehyde (CH_3CHO) and ammonia (NH_3) are emitted at high temperature from a crematory furnace, there is insufficient report on the effect of high temperature and simultaneous removal. The present research experimentally investigates the technical feasibility of using corona discharge reactions to treat high-temperature exhaust gas containing acetaldehyde and ammonia. The simultaneous removal efficiency of these gases from nitrogen and air is obtained experimentally. The experimental results reveal that the presence of oxygen does significantly enhance the overall removal efficiency. Similarly, it is found that the presence of water vapor also enhances the removal efficiency of the target gases from the nitrogen-oxygen mixture. The generation of undesirable byproducts such as NO_x is also investigated. The present technique should be applicable to the simultaneous removal of different nanoparticles at high efficiency.
机译：静电除尘器（ESP）是电晕作为离子源的最普遍应用。 ESP广泛用于工业集尘和家庭通风系统中以清洁气流。但是，ESP尚未用于去除气流中的气体污染物。电子附着是用于气体净化的有前途的技术之一。当电晕放电反应器中产生的低能电子被诸如乙醛和细穗等负电性杂质捕获以产生负离子和带电粒子时，就会发生电子附着反应。负离子和带电粒子在电场中漂移到阳极（反应器壁），并在那里沉积而被去除。此外，当载气为潮湿空气时，还会产生O〜-，O自由基，臭氧和OH_-。这些阴离子和自由基也有助于去除效率。尽管从火化炉中高温释放出乙醛（CH_3CHO）和氨（NH_3），但关于高温和同时去除的影响的报道不足。本研究实验性地研究了使用电晕放电反应处理含乙醛和氨的高温废气的技术可行性。通过实验获得了从氮气和空气中同时去除这些气体的效率。实验结果表明，氧气的存在确实显着提高了整体去除效率。类似地，发现水蒸气的存在还提高了从氮气-氧气混合物中除去目标气体的效率。还研究了不良副产物例如NO_x的产生。本技术应适用于高效地同时去除不同的纳米颗粒。

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