Catalytic nonthermal plasma reactor for the abatement of low concentrations of isopropanol

Karuppiah, J.; Sivachandiran, L.; Karvembu, Ramasamy; Subrahmanyam, Ch.

doi:10.1016/j.cej.2010.09.017

Cited by 41 publications

(22 citation statements)

References 22 publications

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“…Ozone formation inside the NTP reactor is a known fact and it has been reported that with suitable catalyst integration to NTP, the selectivity to total oxidation can be improved (Karuppiah et al 2010). During the present study, at 230 J/l, 350 ppm of ozone was observed, whereas at the same input energy MnO 2 and TiO 2 /MnO x /SMF showed complete destruction of ozone.…”

Section: Resultsmentioning

confidence: 60%

“…During the present study, at 230 J/l, 350 ppm of ozone was observed, whereas at the same input energy MnO 2 and TiO 2 /MnO x /SMF showed complete destruction of ozone. Decomposition of ozone on MnOx may lead to the formation of atomic oxygen that may improve the performance of the NTP reactor (Futamura and Gurusamy 2005;Harling et al 2009;Karuppiah et al 2010). However, TiO 2 may not show any appreciable activity for ozone decomposition.…”

Section: Resultsmentioning

confidence: 99%

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Catalytic nonthermal plasma reactor for the abatement of low concentrations of benzene

Karuppiah

Reddy

et al. 2013

Int. J. Environ. Sci. Technol.

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Oxidative decomposition of dilute benzene in air was carried out in a dielectric barrier discharge reactor with inner metal fiber electrode that was later modified with transition metal oxides. Typical results indicated the best performance of the designed reactor for the removal of dilute benzene, where conventional techniques may not be efficient. The introduction of transition metal oxides in the discharge zone increased the conversion of benzene and shifted the product distribution to total oxidation. The performance of the reactor was further improved on humidification of air stream. The better performance of MnO x /SMF over CoO x and SMF may be due to in situ decomposition of ozone that may lead to the formation of strong oxidant atomic oxygen, whereas the best performance with TiO 2 /MnO x /SMF may be assigned due to the synergy between ozone decomposition on MnO x surface and photocatalytic action on TiO 2 .

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Section: Resultsmentioning

confidence: 60%

Section: Resultsmentioning

confidence: 99%

Catalytic nonthermal plasma reactor for the abatement of low concentrations of benzene

Karuppiah

Reddy

et al. 2013

Int. J. Environ. Sci. Technol.

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“…품의 세정에 많이 사용되고 있는데, 작업자들이 IPA에 노출되면 두통, 우울증, 구토 등의 증상을 나타낸다 [6,7]. 일반적인 IPA 제거방법으로 습식 스크러버(scrubber)와 열산화 방 법이 알려져 있으나 [7], 흡수법은 단순히 오염물질을 기상에서 액상으 로 전달하므로 2차적인 수질오염 문제를 야기하고, 750 ℃ 이상의 고 온을 필요로 하는 열산화 방법은 높은 연료비용과 특수한 내열 소재 를 사용해야 하는 문제점이 있다 [3].…”

Section: 및 세정제로 널리 사용되고 있는 물질이다 특히 디스크헤드와 레이 저의 렌즈 광학 디스크 드라이브 및 액정unclassified

Oxidation of Isopropyl Alcohol in Air by a Catalytic Plasma Reactor System

Jo¹,

Mok²

2014

Applied Chemistry for Engineering

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A catalytic plasma reactor was employed for the oxidation of isopropyl alcohol (IPA) classified as a volatile organic compound (VOC). Copper oxide (Cu : 0.5% (w/w)) supported on a multichannel porous ceramic consisting of α-Al2O3 was used as a catalyst, which was directly exposed to the plasma created in it. The effects of discharge voltage and reaction temperature on the concentrations of IPA and its byproducts were examined to understand the behavior of the catalytic plasma reactor. Without thermal insulation, the reactor temperature increased up to 120 ℃ at an applied voltage of 17 kV (discharge power : 28 W), and the IPA at a flow rate of 1 L min -1 (O2 : 10% (v/v); IPA : 1000 ppm) was completely removed. At temperatures below 120 ℃, however, besides the desirable product CO2, several unwanted byproducts such as acetone, formaldehyde and CO were also formed from IPA. On the other hand, when the reactor was thermally insulated, the plasma discharge increased the temperature up to 265 ℃ under the same condition and most of IPA was oxidized to CO2. Without loading CuO on the ceramic support, the plasma discharge in the thermally insulated reactor produced nearly equal amounts of CO2 and CO. On comparison, with the catalyst alone (temperature : 265 ℃), more than 70% of the removed IPA was simply converted into another type of VOC (acetone), indicating that the catalyst assisted by the plasma is more effective in the oxidation of IPA than that of the catalyst-alone process. Keywords

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“…The recommend exposure limit to IPA is 400 ppm (US Occupational Safety and Health Administration) and it is known that higher concentration can cause health problems like irritation of eyes, drowsiness, and dizziness; hence, its abatement is warranted [3,4]. IPA from industrial effluent can be recovered by absorption into water by using wet scrubbers followed by distillation [4].…”

Section: Introductionmentioning

confidence: 99%

“…and motor vehicles etc. VOCs are known to pollute both outdoor and indoor air [1][2][3]. Moreover, once emitted into the atmosphere, VOCs may stay in the atmosphere for a long duration and their presence in the atmosphere may also cause photochemical smog, secondary aerosol and depletion of ozone [2].…”

Section: Introductionmentioning

confidence: 99%