Plasma Chemistry and Plasma Processing最新文献_第8页

Numerical Simulation of the Voltage–Current Characteristic of an Atmospheric Pressure Discharge: The Glow-to-Arc Transition 大气压力放电的电压-电流特性数值模拟：辉光到电弧的转变

IF 2.6 3区物理与天体物理

Plasma Chemistry and Plasma Processing Pub Date : 2024-01-03 DOI: 10.1007/s11090-023-10438-4

E. Cejas, L. Prevosto, F. O. Minotti

{"title":"Numerical Simulation of the Voltage–Current Characteristic of an Atmospheric Pressure Discharge: The Glow-to-Arc Transition","authors":"E. Cejas, L. Prevosto, F. O. Minotti","doi":"10.1007/s11090-023-10438-4","DOIUrl":"10.1007/s11090-023-10438-4","url":null,"abstract":"<div><p>The glow-to-arc transition of a convection-stabilized atmospheric pressure air discharge is numerically investigated. Two separate models are considered: a one-dimensional axisymmetric time-dependent fluid model of the positive column, describing the thermal-instability, and a sheath model of a cold cathode describing the field-emission instability, which must then be properly matched together. The fluid model considers the most important chemical reactions in air plasma, including thermal ionization in atomic collisions. The radial electric field in the plasma is obtained from the Poisson equation. The voltage–current characteristic of the discharge is simulated for a time-varying current up to 300 mA. It is found that at some critical value slightly above 200 mA, the contraction of the positive column arises from a vibrational–translational energy relaxation. The subsequent increases in the discharge current density in the positive column drive in turn a field-emission instability in the cathode, which is accompanied by a large voltage drop. Simulation results are validated against available experimental data.</p></div>","PeriodicalId":734,"journal":{"name":"Plasma Chemistry and Plasma Processing","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2024-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139105488","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Numerical Simulation Study on Plasma Rapid Heater of Methane 甲烷等离子体快速加热器的数值模拟研究

IF 2.6 3区物理与天体物理

Plasma Chemistry and Plasma Processing Pub Date : 2023-12-27 DOI: 10.1007/s11090-023-10433-9

Shaopeng Wang, Defu Kong, Xianhui Chen, Cheng Wang, Weidong Xia

{"title":"Numerical Simulation Study on Plasma Rapid Heater of Methane","authors":"Shaopeng Wang, Defu Kong, Xianhui Chen, Cheng Wang, Weidong Xia","doi":"10.1007/s11090-023-10433-9","DOIUrl":"10.1007/s11090-023-10433-9","url":null,"abstract":"<div><p>In this paper, we present a plasma rapid heater (PRH) designed to uniformly heat methane with electric arc thermal plasma and reduce loss rate. Our model uses a simplified and detailed mechanism to analyze the rapid and intense mixing process between a plasma mainstream and circumferential cold jets of methane in a hydrogen environment. The research focuses on three areas: the plasma mainstream section, the circumferential jet mixing chamber, and the reaction chamber. We investigate the characteristics of the mainstream and explore the impact of the jet momentum ratio on the mixing process and the losses from methane heating. We explain these phenomena using Damkohler numbers to demonstrate the relationship from a time-scale perspective. The findings indicate that an increased momentum ratio improves mixing, reduces temperature and material non-uniformity, and minimizes losses from pyrolysis during methane heating. Additionally, we provide a formula for calculating the penetration depth of the jet. The examination of Damkohler numbers also suggests that the momentum ratio primarily reduces methane losses by extending the reaction time scale. This work offers guidance on extending the usage of plasma heaters and integrating them into other industry processes in the future.</p></div>","PeriodicalId":734,"journal":{"name":"Plasma Chemistry and Plasma Processing","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2023-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139051688","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Propylene Epoxidation in a Low-Temperature Parallel-Plate Dielectric Barrier Discharge Reactor with Two Frosted Glass Plates: Effects of Separate Propylene Feed 带两块磨砂玻璃板的低温平行板绝缘屏障放电反应器中的丙烯环氧化反应：单独丙烯进料的影响

IF 2.6 3区物理与天体物理

Plasma Chemistry and Plasma Processing Pub Date : 2023-12-20 DOI: 10.1007/s11090-023-10437-5

Nitikorn Ditthawat, Krittiya Pornmai, Malee Santikunaporn, Surantsawadee Kungsanant, Vissanu Meeyoo, Sumaeth Chavadej

{"title":"Propylene Epoxidation in a Low-Temperature Parallel-Plate Dielectric Barrier Discharge Reactor with Two Frosted Glass Plates: Effects of Separate Propylene Feed","authors":"Nitikorn Ditthawat, Krittiya Pornmai, Malee Santikunaporn, Surantsawadee Kungsanant, Vissanu Meeyoo, Sumaeth Chavadej","doi":"10.1007/s11090-023-10437-5","DOIUrl":"10.1007/s11090-023-10437-5","url":null,"abstract":"<div><p>The epoxidation reaction of propylene (C<sub>3</sub>H<sub>6</sub>) for propylene oxide (PO) production was, for the first time of its kind, investigated in a low-temperature parallel-plate dielectric barrier discharge system with two frosted glass plates and a separate C<sub>3</sub>H<sub>6</sub> feed under ambient condition. For the mixed feed experiments, the maximum PO selectivity was found at a feed molar air-to-C<sub>3</sub>H<sub>6</sub> ratio of 0.5:1, an applied voltage of 7 kV, an input of 550 Hz, and a feed flow rate of the mixed gas of 100 cm<sup>3</sup>/min (corresponding to a residence time (RT) of 12.1 s). At the optimum operational conditions, a separate C<sub>3</sub>H<sub>6</sub> feed position fraction of 1 (complete separation of C<sub>3</sub>H<sub>6</sub>) with total reactant feed flow rate of 100 cm<sup>3</sup>/min (corresponding to an O<sub>2</sub> residence time (RT) of 24.1 s), the greatest propylene oxide selectivity of 16.40% was achevied. The relatively high PO selectivity with very low selectivities for all other products and with the absence of both CO and CO<sub>2</sub> obseved in this studied resulted from less active of C<sub>3</sub>H<sub>6</sub> due to the separate feed of C<sub>3</sub>H<sub>6</sub>. The C<sub>3</sub>Hseparate feed is fundamentally responsible for the reduction in all the undesired reactions including cracking, dehydrogenation, coupling, and oxidations of C<sub>3</sub>H<sub>6</sub>.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":734,"journal":{"name":"Plasma Chemistry and Plasma Processing","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2023-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138820062","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synthesis of Methyl Esters Employing a DBD Plasma Reactor with Liquid-Phase Discharge 利用液相放电的 DBD 等离子反应器合成甲基酯

IF 2.6 3区物理与天体物理

Plasma Chemistry and Plasma Processing Pub Date : 2023-12-20 DOI: 10.1007/s11090-023-10435-7

Maíra Oliveira Palm, Paola Nichele Pienta, Diego Alexandre Duarte, Cátia Regina Silva de Carvalho Pinto, Rafael de Camargo Catapan

{"title":"Synthesis of Methyl Esters Employing a DBD Plasma Reactor with Liquid-Phase Discharge","authors":"Maíra Oliveira Palm, Paola Nichele Pienta, Diego Alexandre Duarte, Cátia Regina Silva de Carvalho Pinto, Rafael de Camargo Catapan","doi":"10.1007/s11090-023-10435-7","DOIUrl":"10.1007/s11090-023-10435-7","url":null,"abstract":"<div><p>The use of a dielectric barrier discharge plasma reactor with liquid-phase discharge was investigated in the production of methyl esters by transesterification reaction at room temperature, atmospheric pressure and without any previous reactant stirring step. The effects of applied voltage, reaction time and catalyst content were analyzed on ester production. The transesterification reactions of vegetable oil and monoesters were compared to understand the effect of dielectric barrier discharge plasma on miscible and poorly miscible liquid phases. The power transmitted to the plasma was evaluated for different conditions in order to evaluate the energy expenditure of the plasma reactor in the transesterification reaction and the factors that influence it. Results of the transesterification of vegetable oil were analyzed through sustainability indicators regarding mass productivity, energy consumption and cost of production. The transesterification of monoester showed higher conversion rates when compared to the transesterification of vegetable oil due to the fact that reactants are miscible. The analysis of the power transmitted to the plasma showed that conditions with lower energy expenditure are obtained with more polar solutions and with lower applied voltages to the plasma. Conditions with low plasma applied voltage showed significantly better results in the energy indicators. The results with sustainability indicators suggest that an optimized route using a plasma-assisted catalytic reactor is competitive when compared with conventional reactors for biodiesel production.</p></div>","PeriodicalId":734,"journal":{"name":"Plasma Chemistry and Plasma Processing","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2023-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138820367","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dielectric Barrier Discharge Plasma-Enabled Energy Conversion Under Multiple Operating Parameters: Machine Learning Optimization 多种操作参数下的介质势垒放电等离子体能源转换：机器学习优化

IF 2.6 3区物理与天体物理

Plasma Chemistry and Plasma Processing Pub Date : 2023-12-13 DOI: 10.1007/s11090-023-10434-8

Xin Zeng, Shuai Zhang, Xiucui Hu, Tao Shao

{"title":"Dielectric Barrier Discharge Plasma-Enabled Energy Conversion Under Multiple Operating Parameters: Machine Learning Optimization","authors":"Xin Zeng, Shuai Zhang, Xiucui Hu, Tao Shao","doi":"10.1007/s11090-023-10434-8","DOIUrl":"10.1007/s11090-023-10434-8","url":null,"abstract":"<div><p>Dielectric barrier discharge is an important method in plasma-enabled energy conversion. By coupling different power sources, plasma parameters can be easily controlled by a variety of operating parameters to optimize plasma-enabled non-oxidative methane conversion and plasma-catalytic ammonia synthesis. Due to the complexity of the reactions in the plasma, the application of the trial-and-error experiment method to multi-parameter problems will consume a lot of resources and time. When the cause of the change in response can be known, multi-parameter regression and sure independence screening and sparsifying operator can reasonably predict the changing relationship between the influencing factors and the experimental results, and at the same time give the expression, which is applied to the prediction of plasma-enabled non-oxidative methane conversion under different rising times, pulse widths, frequencies, and voltages. However, catalysts are usually added in plasma energy conversion. The characteristics of catalysts are determined by multiple macro- and micro-characteristics. If fitting analysis is carried out for each feature, the problem of data explosion will be brought about, and this is not feasible in the experiment. Therefore, the artificial neural network is used to explain the influence of the N<sub>2</sub> ratio and gas temperature of different catalysts due to the lack of clear characteristic quantity to characterize the catalytic action in plasma-catalytic ammonia synthesis. Different machine learning methods applied to different problems will accelerate the parameter optimization in plasma-enabled energy conversion.</p></div>","PeriodicalId":734,"journal":{"name":"Plasma Chemistry and Plasma Processing","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2023-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138631684","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Quad-atmospheric Pressure Plasma Jet (q-APPJ) Treatment of Chilli Seeds to Stimulate Germination 四大气压等离子体射流 (q-APPJ) 处理辣椒种子以刺激发芽

IF 2.6 3区物理与天体物理

Plasma Chemistry and Plasma Processing Pub Date : 2023-12-08 DOI: 10.1007/s11090-023-10436-6

Naeem Ahmed, Asad Masood, Rubab Mumtaz, M. F. Mohd Razip Wee, Kok Meng Chan, Anuttam Patra, Kim S. Siow

引用次数: 0

Antibacterial Modification of Cotton Fabric Through Argon Plasma-Induced Grafting Polymerization 氩等离子体诱导接枝聚合对棉织物进行抗菌改性

IF 2.6 3区物理与天体物理

Plasma Chemistry and Plasma Processing Pub Date : 2023-12-06 DOI: 10.1007/s11090-023-10430-y

Zhipeng Ma, Hua Wang, Chunxia Wang, Yujie Chen

{"title":"Antibacterial Modification of Cotton Fabric Through Argon Plasma-Induced Grafting Polymerization","authors":"Zhipeng Ma, Hua Wang, Chunxia Wang, Yujie Chen","doi":"10.1007/s11090-023-10430-y","DOIUrl":"10.1007/s11090-023-10430-y","url":null,"abstract":"<div><p>Developing antibacterial materials is an efficient way to reduce the risk of harmful microorganism to human body. As a kind of popular textiles, cotton fabric (CF) is easy to breed microorganism and it is necessary to render it with biocidal effect. In this work, a water-soluble N-halamine precursor, (E)-1-(4-(allyloxy)phenyl)-N-(2-(piperazin-1-yl)ethyl)methanimine (APPEM), was synthesized and grafted onto cotton fabric through an argon plasma-induced grafting polymerization process. Afterward, the grafted cotton fabric was exposed to dilute sodium hypochlorite solution to change N–H bond into N–Cl bond and then the antibacterial cotton fabric (CF-APPEM-Cl) was obtained. The treated cotton fabric presented considerable biocidal efficacy and stability against UV light, washing, and storage. <i>Escherichia coli</i> (6.63 logs) and <i>Staphylococcus aureus</i> (6.44 logs) could be effectively inactivated within 60 min. Also, the oxidative chlorine on the fabric recovered over 76.9 and 81.5% after UV irradiation for 24 h and 50 washing cycles, respectively. And the oxidative chlorine remained 85% after 30 days of storage. Meanwhile, the mechanical properties of cotton fabric were hardly affected by this antibacterial treatment. This work provides a simple and efficient way to prepare antibacterial cotton fabric with high performance, which might be helpful to promote the development of antibacterial textiles.</p></div>","PeriodicalId":734,"journal":{"name":"Plasma Chemistry and Plasma Processing","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2023-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138543336","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

$$hbox {CO}_2$$ / $$hbox {CH}_4$$ Glow Discharge Plasma: Part I—Experimental and Numerical Study of the Reaction Pathways $$hbox {CO}_2$$ / $$hbox {CH}_4$$辉光放电等离子体:第一部分-反应途径的实验和数值研究

IF 3.6 3区物理与天体物理

Plasma Chemistry and Plasma Processing Pub Date : 2023-12-05 DOI: 10.1007/s11090-023-10421-z

Edmond Baratte, Carolina A. Garcia-Soto, Tiago Silva, Vasco Guerra, Vasile I. Parvulescu, Olivier Guaitella

{"title":"$$hbox {CO}_2$$ / $$hbox {CH}_4$$ Glow Discharge Plasma: Part I—Experimental and Numerical Study of the Reaction Pathways","authors":"Edmond Baratte, Carolina A. Garcia-Soto, Tiago Silva, Vasco Guerra, Vasile I. Parvulescu, Olivier Guaitella","doi":"10.1007/s11090-023-10421-z","DOIUrl":"https://doi.org/10.1007/s11090-023-10421-z","url":null,"abstract":"<p>A fundamental study of <span>(hbox {CO}_2)</span>/<span>(hbox {CH}_4)</span> plasma is performed in a glow discharge at a few Torr. Experimental and numerical results are compared to identify the main reaction pathways. OES-based techniques and FTIR (Fourier Transform Infrared) spectroscopy are used to determine molecules densities and gas temperature. Several conditions of pressure, initial mixture and residence time are measured. The main dissociation products are found to be CO and <span>(hbox {H}_2)</span>. The LoKI simulation tool was used to build a simplified kinetic scheme to limit the uncertainties on rate coefficients, but sufficient to reproduce the experimental data. To this aim, only molecules containing at most one carbon atom are considered based on the experimental observations. Obtaining a good match between the experimental data and the simulation requires the inclusion of reactions involving the excited state <span>(hbox {O}(^{1}hbox {D}))</span>. The key role of <span>(hbox {CH}_3)</span> radical is also emphasized. The good match obtained between the experiment and the simulation allows to draw the main reaction pathways of the low-pressure <span>(hbox {CO}_2)</span>-<span>(hbox {CH}_4)</span> plasmas, in particular to identify the main back reaction mechanisms for <span>(hbox {CO}_2)</span>. The role of <span>(hbox {CH}_2)</span>O and <span>(hbox {H}_2)</span>O in the gas phase is also discussed in depth as they appear to play an important role on catalytic surface studied in the part II of this study.\u0000</p>","PeriodicalId":734,"journal":{"name":"Plasma Chemistry and Plasma Processing","volume":null,"pages":null},"PeriodicalIF":3.6,"publicationDate":"2023-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138534197","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Correction to: Generation of Multiple Jet Capillaries in Advanced Dielectric Barrier Discharge for Large‑Scale Plasma Jets 修正:在大型等离子体射流的先进介质阻挡放电中产生多个喷射毛细血管

IF 3.6 3区物理与天体物理

Plasma Chemistry and Plasma Processing Pub Date : 2023-11-30 DOI: 10.1007/s11090-023-10432-w

Duc Ba Nguyen, Shirjana Saud, Quang Thang Trinh, Hongjie An, Nam‑Trung Nguyen, Quang Hung Trinh, Hoang Tung Do, Young Sun Mok, Won Gyu Lee

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Special Issue on “Dielectric Barrier Discharges and their Applications” in Commemoration of the 20th Anniversary of Dr. Ulrich Kogelschatz’s Work 为纪念Ulrich Kogelschatz博士工作20周年而出版的“介质阻挡放电及其应用”特刊

IF 3.6 3区物理与天体物理

Plasma Chemistry and Plasma Processing Pub Date : 2023-11-30 DOI: 10.1007/s11090-023-10431-x

Annemie Bogaerts

引用次数: 0