Ion-drift reactor™ concept

Babko-Malyi, S.

doi:10.1016/s0378-3820(99)00100-9

Cited by 2 publications

(1 citation statement)

References 15 publications

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“…Trace impurities in negative corona discharge field trends to become negative ions by electron attachment (11). Negatively charged impurities such as SF6 -(12) and chloronitrobenzene -(13) can be separated from carrier gas flow by an electrical field (14,15). However, there is an obstruction to applied suitable electrical field for separation due to the common use of the discharge voltage and migration voltage.…”

Section: Introductionmentioning

confidence: 99%

Electrostatic Separation of Volatile Organic Compounds by Ionization

Ito

Namiki

Lee

et al. 2002

Environ. Sci. Technol.

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Removal technique of trace volatile organic compounds (VOCs) from air or other gases is of great concern in order to obtain contamination-free indoor air and various process gases for semiconductor manufacturing process. We propose a new technique for separating trace gas components. This technique utilizes preferential ionization and electrical migration of ions. Nitrogen and oxygen gas flow containing toluene vapor is divided into two flows, while the flow is irradiated with alpha-ray from 241Am under a DC electric field. The ionized toluene vapor in one flow electrically migrates into the other flow causing toluene rich and free flows. The separation efficiency of toluene is 50% when 0.5 L/min of inlet nitrogen stream contains 0.15 ppm of toluene at the applied voltage of 250 V. The separation efficiency of toluene increases with the mole fraction of oxygen in the carrier gas. The cation concentration flowing out from the separator is lower than the number of separated toluene molecules by 6 orders of magnitude, but the dependency of toluene separation efficiency on the applied voltage is the same as that of cation separation efficiency. The dependency of separation efficiency on the applied voltage and the gas flow velocity is qualitatively explained by the separation model which accounts for the generation and neutralization of VOC ions in the separator.

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Section: Introductionmentioning

confidence: 99%

Electrostatic Separation of Volatile Organic Compounds by Ionization

Ito

Namiki

Lee

et al. 2002

Environ. Sci. Technol.

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Simultaneous Removal of Nitrogen Oxide/Nitrogen Dioxide/Sulfur Dioxide from Gas Streams by Combined Plasma Scrubbing Technology

Chang

Lee

et al. 2004

Journal of the Air & Waste Management Association

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Oxides of nitrogen (NOx) [nitrogen oxide (NO) + nitrogen dioxide (NO2)] and sulfur dioxide (SO2) are removed individually in traditional air pollution control technologies. This study proposes a combined plasma scrubbing (CPS) system for simultaneous removal of SO2 and NOx. CPS consists of a dielectric barrier discharge (DBD) and wet scrubbing in series. DBD is used to generate nonthermal plasmas for converting NO to NO2. The water-soluble NO2 then can be removed by wet scrubbing accompanied with SO2 removal. In this work, CPS was tested with simulated exhausts in the laboratory and with diesel-generator exhausts in the field. Experimental results indicate that DBD is very efficient in converting NO to NO2. More than 90% removal of NO, NOx, and SO2 can be simultaneously achieved with CPS. Both sodium sulfide (Na2S) and sodium sulfite (Na2SO3) scrubbing solutions are good for NO2 and SO2 absorption. Energy efficiencies for NOx and SO2 removal are 17 and 18 g/kWh, respectively. The technical feasibility of CPS for simultaneous removal of NO, NO2, and SO2 from gas streams is successfully demonstrated in this study. However, production of carbon monoxide as a side-product (approximately 100 ppm) is found and should be considered.

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Ion-drift reactor™ concept

Cited by 2 publications

References 15 publications

Electrostatic Separation of Volatile Organic Compounds by Ionization

Electrostatic Separation of Volatile Organic Compounds by Ionization

Simultaneous Removal of Nitrogen Oxide/Nitrogen Dioxide/Sulfur Dioxide from Gas Streams by Combined Plasma Scrubbing Technology

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