Article
Physics, Fluids & Plasmas
Miroslav Snirer, Jozef Toman, Vit Kudrle, Ondrej Jasek
Summary: This paper experimentally investigates the processes governing single- and multi-filament regimes in an atmospheric pressure microwave (MW) torch operated in argon. The main parameter controlling the number of filaments is found to be MW power. The single-filament regime exhibits typical properties of surface wave discharges and the length or thickness of the filament(s) varies almost linearly with input MW power.
PLASMA SOURCES SCIENCE & TECHNOLOGY
(2021)
Article
Thermodynamics
Xinhua Zhang, Zhaowen Wang, Huimin Wu, Chaohui Liu, Jingxing Xu, Xiaobei Cheng
Summary: Microwave-assisted spark ignition (MAI) is a promising technology for achieving ultra-lean combustion. This study investigates the energy deposition and plasma propulsion effect during MAI and analyzes the characteristics of the flame and plasma. Results show that the microwave enhancing effect on flame development varies with equivalence ratio and there is a time window for microwave energy deposition.
COMBUSTION AND FLAME
(2022)
Article
Physics, Fluids & Plasmas
Miroslav Snirer, Vit Kudrle, Jozef Toman, Ondrej Jasek, Jana Jurmanova
Summary: Graphene nanosheets were synthesized from ethanol using a microwave plasma torch, allowing direct observation and analysis of plasma and assembly zones. Important plasma parameters and insights into chemical processes were obtained using optical emission spectroscopy and digital imaging under varying experimental conditions. Plasma diagnostics were subsequently correlated with material properties determined through electron microscopy and Raman spectroscopy.
PLASMA SOURCES SCIENCE & TECHNOLOGY
(2021)
Article
Engineering, Mechanical
Adam Bennett, Nan Yu, Marco Castelli, Guoda Chen, Alessio Balleri, Takuya Urayama, Fengzhou Fang
Summary: This study investigates the application of a coaxial electrode microwave induced plasma torch for glass surface modification, detailing the process improvements and experimental testing that resulted in the creation of a super-hydrophilic surface on glass.
FRONTIERS OF MECHANICAL ENGINEERING
(2021)
Article
Physics, Fluids & Plasmas
N. Yu Babaeva, G. Naidis, D. Tereshonok, T. Chernyshev, L. S. Volkov, M. M. Vasiliev, O. F. Petrov
Summary: In this study, we computationally investigated the process of CO2 splitting to carbon monoxide and oxygen in an atmospheric pressure microwave plasma torch. We used 2D and 1D models to demonstrate different stages of CO2 conversion. Contrary to our expectation, the gas temperature and plasma species behavior in the 1D model were found to be quite different from those obtained with the 2D code. We identified that the reverse gas flow near the central electrode was responsible for the observed discrepancies and achieved reasonable agreement between the two models by adjusting the flow rate in the 1D model.
PLASMA SOURCES SCIENCE & TECHNOLOGY
(2023)
Article
Physics, Applied
Ziyao Jie, Cheng Liu, Shiyang Huang, Guixin Zhang
Summary: This experiment analyzed the gas temperature of atmospheric air microwave plasma core using molecular emission spectrometry, showing the effects of absorbed microwave power levels, gas flow rates, gas humidities, and volume fractions of CO2 in air. The results demonstrated that the plasma gas temperature mainly ranged from 4000 to 7000 K and varied with different factors such as microwave power and CO2 content.
JOURNAL OF APPLIED PHYSICS
(2021)
Review
Chemistry, Multidisciplinary
Limin Yuan, Xiaofei Zhou, Yuqing Cao, Ni Yan, Lianfa Peng, Xiang Lai, Huilin Tao, Lihong Li, Tao Jiang, Zhiqiang Zhu
Summary: Rare earth elements (REEs) have been widely used in modern industry and material science due to their unique chemical properties and luminescence properties. However, their environmental pollution has also received attention. Tracing and controlling the impact of REEs on the environment and developing highly sensitive methods for REEs analysis are of practical significance. Microwave plasma torch (MPT) is a simple, low-power plasma generator that can be used for the analysis of metal elements in aqueous solutions. Compared to traditional methods, MPT-MS has higher sensitivity and requires minimal pretreatment.
ARABIAN JOURNAL OF CHEMISTRY
(2022)
Article
Physics, Applied
Shou-Zhe Li, Yu-Long Niu, Shu-Li Cao, Jiao Zhang, Jialiang Zhang, Xuechen Li
Summary: This study investigates the effect of an atmospheric pressure air microwave plasma torch on methane combustion. The results show that with the use of the plasma torch, the combustion degree of CH4 in rich fuel combustion is significantly enhanced. The authors suggest that the radicals from excitation, ionization, and dissociation processes, as well as the high gas temperature induced by the plasma discharge, play an important role in assisting the combustion.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Physics, Applied
Yu-Long Niu, Shou-Zhe Li, Xing-Chang Wang, Shu-Li Cao, Dezheng Yang, Jialiang Zhang
Summary: An atmospheric-pressure microwave plasma torch is used to generate hydrogen by injecting methanol aerosols into a nitrogen microwave plasma. Two types of reaction chambers are compared to study their influence on hydrogen production. The effects of methanol injection conditions and discharge parameters on methanol decomposition are also investigated. The results show that the active species formed in the plasma discharge plays a key role in the conversion of methanol to hydrogen. The gas flow pattern in the reaction chamber is closely related to the boundary conditions and significantly affects the reaction time. The achievements include a high production rate of 921 l/h, energy yield of 371 l/kWh, and hydrogen yield of 70%.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Qiang Tang, Zhibin Hu, Xiaxia Cui, Zechao Tao, Jau Tang
Summary: By introducing a ceramic tube, a water vapor electrodeless microwave plasma device is proposed to avoid the corrosion of metal electrodes. The device can work directly with liquid water without complex evaporation equipment. The study found that when the microwave power is greater than 800 W, the plasma torch can be excited permanently and stably without loss of ceramic. Optical spectroscopy confirmed the generation of oxygen atom, hydroxyl radical, and hydrogen atom during the decomposition of water vapor. The microwave discharge also improved the crystallinity of the ceramic. This work enriches the microwave plasma techniques for water vapor and has various applications in electric propulsion, hydrogen production, and surface treatment.
APPLIED SCIENCES-BASEL
(2022)
Article
Engineering, Chemical
Yedai Hu, Wencong Zhang, Jiahui Han, Huacheng Zhu, Yang Yang, Muftah H. El-Naas
Summary: This paper proposes a novel MPT device utilizing a four-port microwave source to improve the uniformity and stability of plasma. Experimental results show that the device meets industrial requirements and provides design ideas for future MPT devices.
Article
Chemistry, Physical
Olugbenga Akande, BongJu Lee
Summary: This study investigates a microwave plasma torch-based method called plasma steam methane reforming (PSMR) as a solution to the shortage of hydrogen pipeline infrastructure. The experimental results demonstrate that PSMR has high energy yield, small carbon footprint, and real-time fueling capabilities, making it a promising option for commercial-scale hydrogen production.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Physics, Applied
Jiang-Hong Sun, Su-Rong Sun, Chong Niu, Hai-Xing Wang
Summary: The study applied a 2D model to investigate plasma-electrode interaction in a laminar argon DC plasma torch, considering the effects of different cathodes on plasma characteristics. The results show that different cathodes significantly influence the current density and potential drop in the plasma column, leading to slightly different torch exit parameters.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Computer Science, Interdisciplinary Applications
Christian Busse, Ilya Tsivilskiy, Joerg Hildebrand, Jean Pierre Bergmann
Summary: A customized code using OpenFOAM software was developed to simulate an inductively coupled plasma torch, effectively coupling magnetic field analysis and plasma numerical simulation. The validation results were obtained and compared with literature data, showing good agreement with commercial CFD codes.
COMPUTERS & FLUIDS
(2021)
Article
Thermodynamics
Jyothikrishna Perambadur, Alexander Y. Klimenko, Victor Rudolph, Pradeep Shukla
Summary: This study utilized two and three-dimensional transient models to analyze the effect of operating conditions on arc root fluctuations in a thermal plasma torch with different anode configurations. The research found that input current and gas flow rate significantly impact arc behavior, as well as the effect of arc voltage perturbations on the properties of the exit plume. The study also revealed the impact of anode nozzle geometry on fluctuations and plume behavior.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Physics, Applied
Dmitry L. Tsyganov, Neli Bundaleska, Elena Tatarova
PLASMA PROCESSES AND POLYMERS
(2017)
Article
Physics, Applied
S. Espinho, E. Felizardo, J. Henriques, E. Tatarova
JOURNAL OF APPLIED PHYSICS
(2017)
Article
Chemistry, Physical
N. Bundaleska, D. Tsyganov, A. Dias, E. Felizardo, J. Henriques, F. M. Dias, M. Abrashev, J. Kissovski, E. Tatarova
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2018)
Article
Multidisciplinary Sciences
E. Tatarova, A. Dias, J. Henriques, M. Abrashev, N. Bundaleska, E. Kovacevic, N. Bundaleski, U. Cvelbar, E. Valcheva, B. Arnaudov, A. M. Botelho do Rego, A. M. Ferraria, J. Berndt, E. Felizardo, O. M. N. D. Teodoro, Th. Strunskus, L. L. Alves, B. Goncalves
SCIENTIFIC REPORTS
(2017)
Article
Multidisciplinary Sciences
N. Bundaleska, J. Henriques, M. Abrashev, A. M. Botelho do Rego, A. M. Ferraria, A. Almeida, F. M. Dias, E. Valcheva, B. Arnaudov, K. K. Upadhyay, M. F. Montemor, E. Tatarova
SCIENTIFIC REPORTS
(2018)
Article
Materials Science, Multidisciplinary
N. Bundaleska, N. Bundaleski, A. Dias, F. M. Dias, M. Abrashev, G. Filipic, U. Cvelbar, Z. Rakocevic, Zh Kissovski, J. Henriques, E. Tatarova
MATERIALS RESEARCH EXPRESS
(2018)
Review
Chemistry, Analytical
Neelakandan M. Santhosh, Gregor Filipic, Elena Tatarova, Oleg Baranov, Hiroki Kondo, Makoto Sekine, Masaru Hori, Kostya (Ken) Ostrikov, Uros Cvelbar
Article
Chemistry, Physical
D. Tsyganov, N. Bundaleska, J. Henriques, E. Felizardo, A. Dias, M. Abrashev, J. Kissovski, A. M. Botelho do Rego, A. M. Ferraria, E. Tatarova
Article
Nanoscience & Nanotechnology
Neelakandan M. Santhosh, Kush K. Upadhyay, Petra Strazar, Gregor Filipic, Janez Zavasnik, Andre Mao de Ferro, Rui Pedro Silva, Elena Tatarova, Maria de Fatima Montemor, Uros Cvelbar
Summary: The study demonstrates the successful fabrication of metal sulfide-carbon nanostructure electrode materials with ultra-high capacity and outstanding rate capability. By combining vertically aligned carbon nanotubes with single-crystal metallic nickel grains, the hybrid binder-free electrodes exhibit remarkable electrochemical performance compared to other reported Ni3S2-based electrodes, showing high specific capacity, retention rate at high current densities, and cycling stability.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
D. Tsyganov, N. Bundaleska, A. Dias, J. Henriques, E. Felizardo, M. Abrashev, J. Kissovski, A. M. Botelho do Rego, A. M. Ferraria, E. Tatarova
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2020)
Proceedings Paper
Electrochemistry
E. Kovacevic, S. Hussain, J. Berndt, C. Pattyn, T. Strunskus, M. R. Ammar, A. Canizares, P. Simon, E. Tatarova, A. Dias, P. Y. Tessier, C. Boulmer-Leborgne
PLASMA NANO SCIENCE AND TECHNOLOGY
(2017)