Modular and efficient ozone systems based on massively parallel chemical processing in microchannel plasma arrays: performance and commercialization

Kim, M. H.; Cho, J. H.; Park, S. J.; Eden, J. G.

doi:10.1140/epjst/e2016-60355-8

Cited by 13 publications

(20 citation statements)

References 17 publications

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“…Materials Processing with Microplasma‐Generated Excited Species : Microplasmas are efficient generators of excited reactive species that can be tailored for diverse applications in the treatment of both solid and liquid materials. One striking example of a recently commercialized microplasma reactor process is the production of ozone (O 3 ) for the disinfection of drinking water and the treatment of industrial or municipal wastewater (“gray water”) . These reactors are also suitable for diverse surface modifications, such as imparting hydrophilic surface properties to soft polymeric or carbon‐based materials and conditioning of dental implant materials.…”

Section: Microplasma Devices and Applicationsmentioning

confidence: 99%

“…These reactors are also suitable for diverse surface modifications, such as imparting hydrophilic surface properties to soft polymeric or carbon‐based materials and conditioning of dental implant materials. Commercially available, modular ozone‐generating systems based on assemblies of microchannel plasma “chips,” fabricated in nanoporous alumina (Al 2 O 3 ), are capable of producing ozone with an electrical efficiency above 120 g kWh −1 . Figure a is a photograph of a commercial microplasma ozone module comprising four chips which can be connected in tandem or in parallel for the purpose of increasing the ozone concentration or the ozone production rate, respectively.…”

Section: Microplasma Devices and Applicationsmentioning

confidence: 99%

“…Furthermore, this microreactor technology has been scaled in ozone generation by combining the outputs of multiple modules. Engineering tests with as many as 18 modules have demonstrated that the ozone production rate (expressed in grams per hour) scales linearly with the number of modules up to at least 100 g h −1 . Figure b is an optical microscopy image of a 48‐channel reactor, operating in one atmosphere of pure oxygen that is flowing at a volumetric rate of 2 slm…”

Section: Microplasma Devices and Applicationsmentioning

confidence: 99%

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Microplasmas for Advanced Materials and Devices

et al. 2019

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DavideMariotti is a Professor of Plasma Science and Nanoscale Engineering with Ulster University in UK. He has previously worked internationally in Japan and USA and both in academic and industry. His research encompasses the design and development of innovative plasma-based processes to explore new materials opportunities. Concurrently to a strong application focus in photovoltaics and more broadly in energy applications, his research is also strongly driven by scientific discovery. Kostya (Ken) Ostrikov is aProfessor with Queensland University of Technology, Australia, a Founding Leader of the CSIRO-QUT Joint Sustainable Processes and Devices Laboratory, and Academician of the Academy of Europe and the European Academy of Sciences. His research focuses on nanoscale control of energy and matter contributes to the solution of the grand challenge of directing energy and matter at nanoscales, to develop renewable energy and energy-efficient technologies for a sustainable future.is made on synergistic, complementary features of the plasmas that make them a versatile tool in materials-related applications.We therefore examine the recent progress in microplasmabased synthesis of advanced nanomaterials, highlight the key features of microplasmas, and discuss salient examples of Adv.

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Section: Microplasma Devices and Applicationsmentioning

confidence: 99%

Section: Microplasma Devices and Applicationsmentioning

confidence: 99%

Section: Microplasma Devices and Applicationsmentioning

confidence: 99%

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Microplasmas for Advanced Materials and Devices

et al. 2019

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“…In recent years, microplasma technology has been shown to dramatically reduce the strength of the electrical fields required for ozone generation [15][16][17]. A single chip (microchannel array) can produce 130 grams/kilowatt-hour, about three times more efficient than conventional dielectric barrier discharge (DBD) or corona ozone reactors that have comparable O 3 outputs [17,18]. Microplasma units the size of a book can now generate O 3 from the O 2 present in ambient air, even in conditions of high relative humidity.…”

Section: Introductionmentioning

confidence: 99%

Solar Powered Microplasma-Generated Ozone: Assessment of a Novel Point-of-Use Drinking Water Treatment Method

Dorevitch

Anderson

Shrestha

et al. 2020

IJERPH

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Ozonation is widely used in high-income countries for water disinfection in centralized treatment facilities. New microplasma technology has reduced the energy requirements for ozone generation dramatically, such that a 15-watt solar panel is sufficient to produce small quantities of ozone. This technology has not been used previously for point-of-use drinking water treatment. We conducted a series of assessments of this technology, both in the laboratory and in homes of residents of a village in western Kenya, to estimate system efficacy and to determine if the solar-powered point-of-use water ozonation system appears safe and acceptable to end-users. In the laboratory, two hours of point-of-use ozonation reduced E. coli in 120 L of wastewater by a mean (standard deviation) of 2.3 (0.84) log-orders of magnitude and F+ coliphage by 1.54 (0.72). Based on laboratory efficacy, 10 families in Western Kenya used the system to treat 20 L of household stored water for two hours on a daily basis for eight weeks. Household stored water E. coli concentrations of >1000 most probable number (MPN)/100 mL were reduced by 1.56 (0.96) log removal value (LRV). No participants experienced symptoms of respiratory or mucous membrane irritation. Focus group research indicated that families who used the system for eight weeks had very favorable perceptions of the system, in part because it allowed them to charge mobile phones. Drinking water ozonation using microplasma technology may be a sustainable point-of-use treatment method, although system optimization and evaluations in other settings would be needed.

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“…The optimum power dissipation into single discharge is obtained for a CO 2 content between 20 and 30% by volume. Eden and co-workers [35] presented the results of ozone (O 3 ) generation in a new embodiment consisting of an array of thousands of microchannel plasmas simultaneously, in a so-called plasma chip. This device consists of a flat aluminum strip fabricated by photolithographic and wet chemical processes and comprises 24−48 channels micromachined into nanoporous aluminum oxide, and embedded electrodes.…”

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confidence: 99%

Microplasmas, a platform technology for a plethora of plasma applications

Becker

2017

Eur. Phys. J. Spec. Top.

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Publications describing microplasmas, which are commonly defined as plasmas with at least one dimension in the submillimeter range, began to appear to the scientific literature about 20 years ago. As discussed in a recent review by Schoenbach and Becker [1], interest and activities in basic microplasma research as well as in the use of microplasma for a variety of application has increased significatly over the past 20 years. The number of papers devoted to basic microplasma science increased by an order of magnitude between 1995 and 2015, a count that excludes publications dealing exclusively with technological applications of microplasmas, where the microplasma is used solely as a tool. In reference [1], the authors limited the topical coverage largely to the status of microplasma science and our understanding of the physics principles that enable microplasma operation and further stated that the rapid proliferation of microplasma applications made it impossible to cover both basic microplasma science and their application in a single review article.Some microplasmas are thermal in nature, where the gas temperature is far above the room temperature and is approaching the electron temperature. Another group of microplasmas is nonthermal (also referred to as nonequilibrium or "cold"), with gas temperatures much below electron temperatures. Their electron energy distribution contains a tail of high energy electrons, which causes high excitation, ionization, and dissociation rates. Research into nonthermal microplasmas has enjoyed an enormous growth in the past two decades. These plasmas are particularly attractive for a plethora of applications because they can be operated stably at high gas pressures, in rare gases as well as in molecular gases and gas mixtures, operated in a direct current (dc) mode as well as in pulsed dc and alternate current (ac) modes. Modeling and improved diagnostics have allowed us in the past decade to gain more insight into the specific properties of nonthermal micro-plasmas. Electron densities exceeding 10 16 cm −3 have been measured in pulsed microplasmas [1]. Gas temperatures, on the other hand, can be close to room temperature at low currents in rare gases and generally reach not more than 2000 K in atmospheric-pressure air microplasmas. With discharge voltages of a few hundred volts, and current densities on the order of a

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Modular and efficient ozone systems based on massively parallel chemical processing in microchannel plasma arrays: performance and commercialization

Cited by 13 publications

References 17 publications

Microplasmas for Advanced Materials and Devices

Microplasmas for Advanced Materials and Devices

Solar Powered Microplasma-Generated Ozone: Assessment of a Novel Point-of-Use Drinking Water Treatment Method

Microplasmas, a platform technology for a plethora of plasma applications

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