Decomposition of Toluene Using Nanosecond- Pulsed-Discharge Plasma Assisted With Catalysts

Ogasawara, Akihiko; Han, Junkai; Fukunaga, Kengo; Wang, Jinlong; Wang, Douyan; Namihira, T.; Sasaki, Mitsuru; Akiyama, H.; Zhang, Pengyi

doi:10.1109/tps.2015.2447273

Cited by 9 publications

(9 citation statements)

References 47 publications

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“…Table shows the summary of these identified by‐products by PTR‐TOFMS/NIST database, and their health‐related information. Ogasawara and Wu reported that formic acid is the main by‐product in the exhaust of NTP‐treated toluene. Furthermore, benzene, benzaldehyde, benzyl alcohol, and benzoic acid have been identified on the catalyst surface .…”

Section: Resultsmentioning

confidence: 99%

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Application of proton transfer reaction mass spectrometry for the assessment of toluene removal in a nonthermal plasma reactor

Peng

Zhu

et al. 2018

J Mass Spectrom

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Proton transfer reaction mass spectrometry (PTR-MS) is a mature technique for the real-time measurement and monitoring of volatile organic compounds in the atmosphere. In this paper, a modified quantification method for PTR-MS was used to assess the performance of nonthermal plasma (NTP) reactor for the removal of toluene which was widely used in industrial production processes. Toluene and 11 corresponding organic by-products were tentatively identified and quantified by a proton transfer reaction time-of-flight mass spectrometer. The degradation dynamics of toluene and the formation of organic by-products were monitored in real-time (resolution = 1 second) under "plasma off" and "plasma on" conditions. We conclude that initial concentration and gas flow rate were the key parameters in the health risk assessment of NTP for the removal of toluene. The toluene removal efficiency and CO selectivity decreased with increasing upstream toluene concentration or gas flow rate, whereas the health risk influence index increased with increasing upstream toluene concentration or gas flow rate. The highest removal efficiency of toluene (100%), CO selectivity (53.2%), and the best health risk influence index for organic by-products (0.11) were achieved when the toluene concentration was kept at 105 ppmv and flow rate at 0.4 L/minute. The results demonstrate that PTR-MS is a promising tool to improve the practical applications of volatile organic compound removal by NTP because it can be used to optimize the NTP working conditions by providing a precise, fast, and clear health risk assessment for organic by-products based on their real-time analysis.

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Section: Resultsmentioning

confidence: 99%

“…Ogasawara 44 and Wu 45 reported that formic acid is the main by-product in the exhaust of NTP-treated toluene. Furthermore, benzene, benzaldehyde, benzyl alcohol, and benzoic acid have been identified on the catalyst surface.…”

Section: Study Of Toluene Removal By Ntpmentioning

confidence: 99%

Application of proton transfer reaction mass spectrometry for the assessment of toluene removal in a nonthermal plasma reactor

Peng

Zhu

et al. 2018

J Mass Spectrom

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“…In this review, there are two definitions of pulse discharge plasmas: 'sub-microsecond discharge' refers to discharge with a pulse duration of several hundred nanoseconds, and 'nanosecond discharge' means a pulse duration of less than 10 ns. Nanosecond pulsed discharge plasma is a type of nonthermal plasma that is generated at atmospheric pressure [1,2] and is highly efficient for plasma processing applications such as ozone generation, nitric oxide treatment, and volatile organic compound (VOC) treatment [3][4][5][6][7][8][9][10]. The unique characteristics of its discharge properties result in this high efficiency.…”

Section: Introductionmentioning

confidence: 99%

Nanosecond pulsed streamer discharges: II. Physics, discharge characterization and plasma processing

Wang

Namihira

2020

Plasma Sources Sci. Technol.

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Nanosecond pulsed streamer discharge has unique characteristics that differentiate it from longer discharges. The very fast voltage rise time, peak voltage plateau, short pulse duration, and fast fall time enable a large volume of uniform nonthermal plasma generation at atmospheric pressure. This review explains the physics of nanosecond discharge plasma through experimental and simulated studies for plasma processing techniques. The following are discussed and compared between sub-microsecond and nanosecond discharge plasma: discharge phase transition, discharge propagation, production of chemically active species, temperature change of gas during plasma propagation, electrode geometry, effect of voltage rise rate, voltage polarities, and N 2 /O 2 gas composition ratio in air seeding gas. Nanosecond pulse discharge plasma is characterized by a considerably faster streamer head propagation velocity and reduced gas heating, resulting in a higher energy efficiency for plasma processing. Ozone generation, nitric oxide treatment and volatile organic compound treatment results are given as examples of plasma processing.

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“…It usually requires a high temperature (150 °C) for this reaction when the mixing of rubber compounds begins. Inevitably, volatile organic compounds (VOCs) [ 16 , 17 , 18 , 19 ] like methanol and ethanol will be produced during this process [ 20 , 21 ], which is harmful to rubber performance and worker’s health [ 22 , 23 ].…”

Section: Introductionmentioning

confidence: 99%

Using Epoxidized Solution Polymerized Styrene-Butadiene Rubbers (ESSBRs) as Coupling Agents to Modify Silica without Volatile Organic Compounds

et al. 2020

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Rubber used in tire is usually strengthened by nanofiller, and the most popular nanofiller for tire tread rubber is nano silica, which can not only strengthen rubber but also lower the tire rolling resistance to reduce fuel consumption. However, silica particles are difficult to disperse in the rubber matrix because of the abundant silicon hydroxyl on their surface. Silane coupling agents are always used to modify silica and improve their dispersion, but a large number of volatile organic compounds (VOCs) are emitted during the manufacturing of the nanosilica/rubber composites because of the condensation reaction between silane coupling agents and silicon hydroxyl on the surface of silica. Those VOCs will do great harm to the environment and the workers’ health. In this work, epoxidized solution polymerized styrene-butadiene rubbers (ESSBR) with different epoxy degrees were prepared and used as macromolecular coupling agents aimed at fully eliminating VOCs. Fourier transform infrared (FTIR) spectroscopy and nuclear magnetic resonance (NMR) analyses verified that the different ESSBRs were successfully synthesized from solution polymerized styrene-butadiene rubbers (SSBR). With the help of the reaction between epoxy groups and silicon hydroxyl without any VOC emission, nanosilica can be well dispersed in the rubber matrix when SSBR partially replaced by ESSBR which was proved by Payne effect and TEM analysis. Dynamic and static mechanical testing demonstrated that silica/ESSBR/SSBR/BR nanocomposites have better performance and no VOC emission compared with Bis-(γ-triethoxysilylpropyl)-disulfide (TESPD) modified silica/rubber nanocomposites. ESSBR is very hopeful to replace traditional coupling agent TESPD to get high properties silica/rubber nanocomposites with no VOCs emission.

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Decomposition of Toluene Using Nanosecond- Pulsed-Discharge Plasma Assisted With Catalysts

Cited by 9 publications

References 47 publications

Application of proton transfer reaction mass spectrometry for the assessment of toluene removal in a nonthermal plasma reactor

Application of proton transfer reaction mass spectrometry for the assessment of toluene removal in a nonthermal plasma reactor

Nanosecond pulsed streamer discharges: II. Physics, discharge characterization and plasma processing

Using Epoxidized Solution Polymerized Styrene-Butadiene Rubbers (ESSBRs) as Coupling Agents to Modify Silica without Volatile Organic Compounds

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