Plasma Chemistry and Plasma Processing最新文献

Numerical Simulation of the Ionic Composition and Ionization Phenomena in the Positive Column of a Millisecond DC-Pulsed Glow-Type Discharge in Atmospheric Pressure Air with a Water-Cathode 带水阴极的大气压空气中毫秒直流脉冲辉光型放电正柱中离子成分和电离现象的数值模拟

IF 3.6 3区物理与天体物理

Plasma Chemistry and Plasma Processing Pub Date : 2024-08-11 DOI: 10.1007/s11090-024-10496-2

M. G. Ferreyra, E. Cejas, B. Santamaría, J. C. Chamorro, B. J. Goméz, L. Prevosto

{"title":"Numerical Simulation of the Ionic Composition and Ionization Phenomena in the Positive Column of a Millisecond DC-Pulsed Glow-Type Discharge in Atmospheric Pressure Air with a Water-Cathode","authors":"M. G. Ferreyra, E. Cejas, B. Santamaría, J. C. Chamorro, B. J. Goméz, L. Prevosto","doi":"10.1007/s11090-024-10496-2","DOIUrl":"https://doi.org/10.1007/s11090-024-10496-2","url":null,"abstract":"A numerical investigation of a glow-type discharge in humid air with a water-cathode is reported. A complete block of chemical reactions that self-consistently describes the ionic composition of the plasma is considered. A water molar fraction up to 20% is examined. The electric field strength, emission discharge radius, as well as the OH (A → X) band emission in the positive column was also measured for discharge currents up to 155 mA. The model shows a non-thermal plasma with lower gas temperatures (around 3500 K) than those typically obtained in similar discharges but operating with metal electrodes in dry air. The gas temperature is almost unaffected by the discharge current. The vibrational relaxation through N2–H2O collisions is the main gas heating mechanism. The thermal diffusion due to enhanced thermal conductivity by water vapor is the primary cooling mechanism. The electron temperature is around 1 eV to ensure that the electron losses (mainly by dissociative recombination of NO+) are compensated by ionization phenomena. The NO+ is the dominant ion, mainly formed by electron-impact ionization of NO molecules. An electron number density close to 1019 m−3 is obtained. For the upper water fraction, the electron-impact ionization of O2 molecules, followed by a quick conversion to NO+, also plays a role. The concentration of OH is ~ 1022 m−3. A comparison between the model results and the experimental data suggests that the molar fraction of water in the plasma is around 20% for the conditions considered.","PeriodicalId":734,"journal":{"name":"Plasma Chemistry and Plasma Processing","volume":null,"pages":null},"PeriodicalIF":3.6,"publicationDate":"2024-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141948039","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

Ar-O2 Plasma-Induced Grafting of Quaternary Ammonium on Polyvinyl Chloride Surface to Improve its Antimicrobial Properties Ar-O2 等离子体诱导季铵在聚氯乙烯表面接枝以改善其抗菌性能

IF 3.6 3区物理与天体物理

Plasma Chemistry and Plasma Processing Pub Date : 2024-07-30 DOI: 10.1007/s11090-024-10495-3

Sui Siyuan, Ni Guohua, Sun Hongmei, Kong Ling, Sun Tao

引用次数: 0

Influence of Dielectric Barrier Discharge Power on the Removal of CH4 and NO From Exhaust Emissions of LNG Engines 介质屏障放电功率对液化天然气发动机尾气中甲烷和氮氧化物去除的影响

IF 2.6 3区物理与天体物理

Plasma Chemistry and Plasma Processing Pub Date : 2024-07-15 DOI: 10.1007/s11090-024-10491-7

Zhengtao Zhao, Lin Lyu, Chuang Xiang, Yunkai Cai

引用次数: 0

Low-Temperature Oxidation of Diesel Particulate Matter Using Dielectric Barrier Discharge Plasma 利用介质阻挡放电等离子体低温氧化柴油微粒物质

IF 3.6 3区物理与天体物理

Plasma Chemistry and Plasma Processing Pub Date : 2024-07-10 DOI: 10.1007/s11090-024-10492-6

Baoyong Ren, Tiantian Zhang, Zuliang Wu, Jing Li, Erhao Gao, Wei Wang, Jiali Zhu, Shuiliang Yao

{"title":"Low-Temperature Oxidation of Diesel Particulate Matter Using Dielectric Barrier Discharge Plasma","authors":"Baoyong Ren, Tiantian Zhang, Zuliang Wu, Jing Li, Erhao Gao, Wei Wang, Jiali Zhu, Shuiliang Yao","doi":"10.1007/s11090-024-10492-6","DOIUrl":"https://doi.org/10.1007/s11090-024-10492-6","url":null,"abstract":"The oxidation behavior of actual diesel particulate matter (DPM) prepared from diesel combustion was studied using a dielectric barrier discharge (DBD) reactor. The primary oxidation temperature (T30 at which 30% of DPM was oxidized) was reduced from 524 °C (with non-discharge, NDC) to 409 °C with discharge (DC). It was found that the dry soot (DS) from DPM after dichloromethane extraction was more difficult to be oxidized than DPM due to the loss of soluble organic fraction (SOF) from DPM. The order of activation energies of DPM and DS under conditions of DC and NDC is: DPM–DC < DPM–NDC < DS–DC < DS–NDC. The intermediates of DPM oxidation at different temperatures, pulse peak voltages and reaction gas atmospheres were investigated via operando DRIFTS–MS. It is found that under DC, SOF can be oxidized to oxygen containing compounds (OCC) at low temperatures, and a higher pulse peak voltage is beneficial to DPM oxidation. The main product of 10 vol% O2/N2 discharge gas is high valence nitrogen oxides like NO2, which participates in DPM oxidation. DBD plasma enhances DPM oxidation primarily through two mechanisms: first, by ionizing O2 to produce strong oxidizing substances, and second, by inhibiting the increasing content of graphitized components. This study provides a comprehensive understanding of DPM oxidation kinetics and intermediates under DBD plasma.","PeriodicalId":734,"journal":{"name":"Plasma Chemistry and Plasma Processing","volume":null,"pages":null},"PeriodicalIF":3.6,"publicationDate":"2024-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141587286","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

Degradation of Methylene Blue by Using an Argon Microwave Plasma Jet in Humid Environment 在潮湿环境中使用氩微波等离子体射流降解亚甲基蓝

IF 3.6 3区物理与天体物理

Plasma Chemistry and Plasma Processing Pub Date : 2024-07-09 DOI: 10.1007/s11090-024-10494-4

Nadir Aloui, Ibtissem Belgacem, Ahmad Hamdan

{"title":"Degradation of Methylene Blue by Using an Argon Microwave Plasma Jet in Humid Environment","authors":"Nadir Aloui, Ibtissem Belgacem, Ahmad Hamdan","doi":"10.1007/s11090-024-10494-4","DOIUrl":"https://doi.org/10.1007/s11090-024-10494-4","url":null,"abstract":"Plasma-liquid interactions yield numerous physicochemical phenomena, rendering them promising for various applications. Plasma-based technology is proposed for water treatment due to its high efficiency in removing contaminants unattainable by conventional techniques. In this study, we employ an argon microwave plasma jet (MWPJ) to investigate methylene blue (MB) degradation. We observe a significant enhancement in the MB degradation rate in a covered system, attributed to increased air humidity promoting hydroxyl radicals (OH) production, which degrade approximately 95% of MB. Furthermore, the injection of O2 gas into the solution under the plasma generates more hydrogen peroxide (H2O2), around 30 mg/L compared to approximately 20 mg/L without injection, although the MB degradation efficiency is reduced. We evaluate MB degradation under various solution properties, revealing that increasing electrical conductivity decreases the MB degradation rate until it becomes independent for conductivities > 10,000 µS/cm. In these latter conditions, a non-conventional temporal evolution of solution conductivity was observed: a decrease during the first tens of minutes followed by a continuous increase for longer treatment time. Conversely, solution acidity minimally affects the MB degradation rate. The MWPJ is characterized by optical emission spectroscopy, showing stability over time and under various solution properties. The energy yield (Y50%) consistently demonstrates superior performance of the MWPJ in a closed environment compared to an open-to-air environment. Although its efficiency is relatively low compared to other systems, we anticipate improvements through parameter adjustments.","PeriodicalId":734,"journal":{"name":"Plasma Chemistry and Plasma Processing","volume":null,"pages":null},"PeriodicalIF":3.6,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141576558","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

Multi-cycle Chamber Conditioning for Plasma Etching of SiO2: From Optimization to Stability in Lot Processing 用于二氧化硅等离子蚀刻的多循环腔室调节：批量加工中从优化到稳定

IF 3.6 3区物理与天体物理

Plasma Chemistry and Plasma Processing Pub Date : 2024-07-08 DOI: 10.1007/s11090-024-10493-5

Ali Nawaz, Alessandro Cian, Lorenza Ferrario, Antonino Picciotto

{"title":"Multi-cycle Chamber Conditioning for Plasma Etching of SiO2: From Optimization to Stability in Lot Processing","authors":"Ali Nawaz, Alessandro Cian, Lorenza Ferrario, Antonino Picciotto","doi":"10.1007/s11090-024-10493-5","DOIUrl":"https://doi.org/10.1007/s11090-024-10493-5","url":null,"abstract":"Hydrofluorocarbon gas chemistries have long been favored for SiO2 etching. However, the fluorocarbon polymer generated during the process not only assists in obtaining a high selectivity, but also leads to chamber wall contamination. The adhesion efficiency of the polymer depends on the chamber wall temperature, which needs to be well-controlled to ensure controllable polymer deposition rate and etch characteristics. Similarly, the increasing gas temperature during the process is also expected to increase the production rate of polymer precursors. Hence, it is important to properly condition the chamber so that a sufficiently high and stable chamber temperature is reached before starting the actual process. This work utilizes an Inductively Coupled Plasma Reactive Ion Etcher to optimize a multi-cycle chamber conditioning process for two C4F8/H2-based chemistries. We use the integrated optical emission spectroscopy (OES) tool to show that the dependence of etch characteristics on conditioning time is much stronger for the highly polymerizing chemistry. For a low conditioning time (< 15 min), the instability of plasma species indicate that the chamber temperature has not yet plateaued, resulting in a ⁓60% decrease of recess in the underlying silicon layer during the lot processing time. By conducting systematic etch tests, we analyze the behavior of key OES peaks to identify the optimal conditioning time (≥ 30 min) for this recipe, which results in only a 13% decrease in silicon recess depth during the processing time. Subsequently, a method to assess the stability of plasma species during the conditioning process is devised, assisting in advance to identify the optimal moment to initiate the lot process. By comparing the experimental results of the two etch recipes, we also highlight the important correlation between conditioning time and polymerizing degree of the chemistry.","PeriodicalId":734,"journal":{"name":"Plasma Chemistry and Plasma Processing","volume":null,"pages":null},"PeriodicalIF":3.6,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141576559","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

Particle Condensation in Two-Temperature (2T) Arc Plasmas of Various SF6 Replacements 各种 SF6 替代品的双温 (2T) 电弧等离子体中的粒子凝结

IF 3.6 3区物理与天体物理

Plasma Chemistry and Plasma Processing Pub Date : 2024-07-01 DOI: 10.1007/s11090-024-10490-8

Linlin Zhong, Bayitake Baheti, Qi Wu

{"title":"Particle Condensation in Two-Temperature (2T) Arc Plasmas of Various SF6 Replacements","authors":"Linlin Zhong, Bayitake Baheti, Qi Wu","doi":"10.1007/s11090-024-10490-8","DOIUrl":"https://doi.org/10.1007/s11090-024-10490-8","url":null,"abstract":"Fluorinated gases, e.g., CF3I, C3F8, C4F8, C4F7N, and C5F10O, show potential to replace SF6 in power industry due to their high dielectric strength and low global warming potential . However, particle condensation from arc plasmas of these compounds may reduce dielectric performance. We perform a systematic investigation of particle condensation in two-temperature (2T) arc plasmas of various SF6 replacements mixed with CO2, N2, and O2, by the Gibbs free energy minimization and entropy maximization methods. The influences of buffer gases, non-equilibrium degree, and gas pressure on particle condensation are discussed in various cases. The results indicate that O2 is necessary to prevent graphite formation in carbon–fluorine gaseous arcs, and specific mixing ratios of CO2 and N2 are required to avoid graphite and iodine crystals in CF3I arc plasmas. The relationship between condensation temperature and non-equilibrium degree is complex, with peaks and valleys observed for graphite and iodine crystal condensation temperatures. Moreover, different calculation methods (Gibbs free energy minimization versus entropy maximization) show varying sensitivity of condensation temperatures to pressure changes. All the above findings highlight the importance of considering non-equilibrium effects and multiple condensed species in evaluating arc plasma compositions of SF6 replacements.","PeriodicalId":734,"journal":{"name":"Plasma Chemistry and Plasma Processing","volume":null,"pages":null},"PeriodicalIF":3.6,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141506305","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

Calculation of the decomposition products of C5F10O-Air mixtures from 500 K to 3500 K with a chemical kinetic model 利用化学动力学模型计算 500 K 至 3500 K C5F10O-Air 混合物的分解产物

IF 3.6 3区物理与天体物理

Plasma Chemistry and Plasma Processing Pub Date : 2024-07-01 DOI: 10.1007/s11090-024-10485-5

Qingqing Gao, Xiaohua Wang, Haofei Sun, Aijun Yang, Chunping Niu

{"title":"Calculation of the decomposition products of C5F10O-Air mixtures from 500 K to 3500 K with a chemical kinetic model","authors":"Qingqing Gao, Xiaohua Wang, Haofei Sun, Aijun Yang, Chunping Niu","doi":"10.1007/s11090-024-10485-5","DOIUrl":"https://doi.org/10.1007/s11090-024-10485-5","url":null,"abstract":"C5F10O-Air mixtures have a great potential to replace SF6 in medium-voltage power equipment. However, during the partial overheating or arc discharge, C5F10O-Air mixtures are inevitably to decompose to form various byproducts. The local chemical non-equilibrium and local thermal non-equilibrium appears due to the finite reaction rates and insufficient energy change between species. This paper establishes a chemical kinetic model to calculate the decomposition byproducts of C5F10O-Air mixtures from 500 K to 3500 K by taking into account the local thermal non-equilibrium and local chemical non-equilibrium simultaneously. The chemical kinetic model contains 50 species and 249 reactions. All the reactions are assumed to be reversible except the reactions producing photos. The local thermal non-equilibrium is characterized by the difference of the electron temperature (Te) and the temperature of heavy species (Th). In this work, the ratio of Te to Th is determined to be a function of the electron number density. Therefore, the value varies with electron number density. The temperature dependent decomposition composition of C5F10O-Air mixtures with C5F10O content to be 5%, 10% and 15% are obtained. In order to investigate the effects of Air on the decomposition of C5F10O, the decomposition products of pure C5F10O from 500 K to 3500 K are also investigated. In addition, the main chemical processes in 0.1C5F10O-0.9Air mixture are investigated by capturing the main reaction pathways. The main reaction pathways can help interpret the formation mechanism of the decomposition products.","PeriodicalId":734,"journal":{"name":"Plasma Chemistry and Plasma Processing","volume":null,"pages":null},"PeriodicalIF":3.6,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141519124","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

Combined Plasma Treatment Effects on Growth and Yield: Second-Generation Potato (Solanum tuberosum L.) Seeds 联合等离子体处理对生长和产量的影响：第二代马铃薯（Solanum tuberosum L.）种子

IF 3.6 3区物理与天体物理

Plasma Chemistry and Plasma Processing Pub Date : 2024-06-28 DOI: 10.1007/s11090-024-10467-7

Mamunur Rashid, M. R. Talukder

{"title":"Combined Plasma Treatment Effects on Growth and Yield: Second-Generation Potato (Solanum tuberosum L.) Seeds","authors":"Mamunur Rashid, M. R. Talukder","doi":"10.1007/s11090-024-10467-7","DOIUrl":"https://doi.org/10.1007/s11090-024-10467-7","url":null,"abstract":"Applications of plasmas in agriculture are fascinating researchers because of its potentiality. Plasmas are applied either for seed treatment or as foliar application of plasma-activated water (PAW) for studying agricultural yield. No work has been done so far to study the effects on growth parameters, enzymatic activities, nutritional parameters, and yield of potato (Solanum tubersum L.) grown from the second-generation seeds (G2) (seeds collected from the potato plants where foliar spray of PAW was applied). Two-fold plasma treatments were applied in this experiment: (a) potato seeds were treated in water with plasma and (b) foliar spray of PAW was applied to potato plants. Effects of plasma treatments were characterized by enzymatic activities, sugar and protein concentrations, potato plant growth and yield characters. The findings show that the plant length, stem diameter, fresh weight, and the concentrations of total chlorophyll and carotene are increased in the plants where G2 treated seeds along with foliar spray of PAWs were provided. Further, the concentrations of total soluble sugar, protein and minerals were increased. Besides, the yield of potato was enhanced by (23.95%), and (23.21%), respectively, in the plants where combined plasma treatments were used compared to controls of first-generation (G1) plasma treated and untreated seeds along with PAW foliar spray.","PeriodicalId":734,"journal":{"name":"Plasma Chemistry and Plasma Processing","volume":null,"pages":null},"PeriodicalIF":3.6,"publicationDate":"2024-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141519125","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

Influence of the Bulb Geometry and Electrical Supply Parameters on the UV Emission of DBD Excimer Lamps 灯泡几何形状和电源参数对 DBD 准分子灯紫外线发射的影响

IF 3.6 3区物理与天体物理

Plasma Chemistry and Plasma Processing Pub Date : 2024-06-28 DOI: 10.1007/s11090-024-10480-w

Arnold Wiesner, Rafael Diez, Hubert Piquet

{"title":"Influence of the Bulb Geometry and Electrical Supply Parameters on the UV Emission of DBD Excimer Lamps","authors":"Arnold Wiesner, Rafael Diez, Hubert Piquet","doi":"10.1007/s11090-024-10480-w","DOIUrl":"https://doi.org/10.1007/s11090-024-10480-w","url":null,"abstract":"The aim of this article is to improve the performance of DBD excimer lamps systems for UV production. Within this framework, our approach considers two distinct directions: the geometric dimensions of the double-barrier lamp bulb and the characteristics of the power supply. To explore these directions, a sampling of 19 bulbs of different geometries is considered, and a specially designed power supply is used, capable of controlling the shape (duration and magnitude) and frequency of current pulses injected into the plasma. A dedicated test bench, including a supervisory program that drives the power supply and collects system performance data, is used to perform parametric sweeps and guarantee measurement repeatability: the set of electrical parameters is fully explored for each lamp, and each experiment is characterized by UV emission performance and electrical generator operating conditions. Multiquadric response surfaces, used to format the results of this multi-variable exploration, reveal the most efficient directions for system optimization: increasing gas volume and, at a given operating frequency, providing the shortest possible current pulses with high amplitude can increase both UV emission and conversion efficiency.","PeriodicalId":734,"journal":{"name":"Plasma Chemistry and Plasma Processing","volume":null,"pages":null},"PeriodicalIF":3.6,"publicationDate":"2024-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141519116","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