Fuli Sun, Lin Xiong, Licheng Wang, Jie Li, Anton Nikiforov, Qing Xiong
This study presents atmospheric‐pressure plasma as a novel catalyst‐free pretreatment method for raw wheat straw (RWS) biomass. The work explores the effects of processing parameters, such as milled particle size, moisture content of RWS, and plasma generations, on pretreatment efficiency. To understand the mechanisms behind the enhanced pretreatment efficiency, various analysis techniques were used to analyze the physical and chemical properties of RWS before and after pretreatment. The analysis reveals that plasma pretreatment significantly damages the surface smoothness of RWS and enhances the decomposition of lignocellulosic structures. These effects are primarily attributed to the reactive species generated by the pulsed discharge, rather than the accompanying UV radiation, acidification, or heating actions during plasma pretreatment.
{"title":"Catalyst‐free pretreatment of raw wheat straw by atmospheric‐pressure pulsed air discharge for enhancement of sugar production","authors":"Fuli Sun, Lin Xiong, Licheng Wang, Jie Li, Anton Nikiforov, Qing Xiong","doi":"10.1002/ppap.202400064","DOIUrl":"https://doi.org/10.1002/ppap.202400064","url":null,"abstract":"This study presents atmospheric‐pressure plasma as a novel catalyst‐free pretreatment method for raw wheat straw (RWS) biomass. The work explores the effects of processing parameters, such as milled particle size, moisture content of RWS, and plasma generations, on pretreatment efficiency. To understand the mechanisms behind the enhanced pretreatment efficiency, various analysis techniques were used to analyze the physical and chemical properties of RWS before and after pretreatment. The analysis reveals that plasma pretreatment significantly damages the surface smoothness of RWS and enhances the decomposition of lignocellulosic structures. These effects are primarily attributed to the reactive species generated by the pulsed discharge, rather than the accompanying UV radiation, acidification, or heating actions during plasma pretreatment.","PeriodicalId":20135,"journal":{"name":"Plasma Processes and Polymers","volume":"22 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141503506","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}
A novel plasma reactor is being investigated for green NOx production, crucial for nitrate‐based fertilizer manufacturing. Various parameters, including air flow rates, gas ratios, ozone, and catalyst effects are explored for NO → NO2 conversion. NOx concentrations reach ~0.6 vol%, with a total production of ~9.7 gr/h and energy cost of ~3.0 mJ/mol, notably favorable for atmospheric gliding arc plasma. Selectivity (~75%) towards NO2 is achieved with ozone addition or catalytic treatment, pivotal for nitrate fertilizer and HNO3 production.
{"title":"Sustainable nitrogen fixation by novel gliding arc plasma reactor for the production of nitrogen fertilizers","authors":"Jyothsna Angineni, PathpiReddy Manoj Kumar Reddy, Srinivas Anga, Puppala Veera Somaiah","doi":"10.1002/ppap.202400059","DOIUrl":"https://doi.org/10.1002/ppap.202400059","url":null,"abstract":"A novel plasma reactor is being investigated for green NOx production, crucial for nitrate‐based fertilizer manufacturing. Various parameters, including air flow rates, gas ratios, ozone, and catalyst effects are explored for NO → NO<jats:sub>2</jats:sub> conversion. NOx concentrations reach ~0.6 vol%, with a total production of ~9.7 gr/h and energy cost of ~3.0 mJ/mol, notably favorable for atmospheric gliding arc plasma. Selectivity (~75%) towards NO<jats:sub>2</jats:sub> is achieved with ozone addition or catalytic treatment, pivotal for nitrate fertilizer and HNO<jats:sub>3</jats:sub> production.","PeriodicalId":20135,"journal":{"name":"Plasma Processes and Polymers","volume":"25 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141503509","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}
This paper comprehensively explores the integration of machine learning (ML) with atmospheric pressure plasma, highlighting its transformative impact in areas, such as modeling, diagnostics, and applications. The paper delves into the application of neural networks and deep learning models in simulating complex plasma dynamics, enhancing prediction accuracy, and reducing computational demands. We also examine the application of ML in plasma diagnostics, including real‐time data analysis and process optimization, demonstrating advancements in monitoring and controlling plasma systems. The article discusses the challenges encountered in this integration process, such as data quality, computational resources, and model interpretability. Finally, we outline future development directions, emphasizing the potential of ML in revolutionizing plasma research, improving operational efficiency, and opening new avenues in plasma technology.
本文全面探讨了机器学习（ML）与常压等离子体的结合，强调了其在建模、诊断和应用等领域的变革性影响。本文深入探讨了神经网络和深度学习模型在模拟复杂等离子体动力学、提高预测精度和降低计算需求方面的应用。我们还研究了 ML 在等离子体诊断中的应用，包括实时数据分析和流程优化，展示了在监测和控制等离子体系统方面的进步。文章讨论了集成过程中遇到的挑战，如数据质量、计算资源和模型可解释性。最后，我们概述了未来的发展方向，强调了人工智能在革新等离子体研究、提高运行效率和开辟等离子体技术新途径方面的潜力。
{"title":"Data‐driven plasma science: A new perspective on modeling, diagnostics, and applications through machine learning","authors":"Mengbing He, Ruihang Bai, Shihao Tan, Dawei Liu, Yuantao Zhang","doi":"10.1002/ppap.202400020","DOIUrl":"https://doi.org/10.1002/ppap.202400020","url":null,"abstract":"This paper comprehensively explores the integration of machine learning (ML) with atmospheric pressure plasma, highlighting its transformative impact in areas, such as modeling, diagnostics, and applications. The paper delves into the application of neural networks and deep learning models in simulating complex plasma dynamics, enhancing prediction accuracy, and reducing computational demands. We also examine the application of ML in plasma diagnostics, including real‐time data analysis and process optimization, demonstrating advancements in monitoring and controlling plasma systems. The article discusses the challenges encountered in this integration process, such as data quality, computational resources, and model interpretability. Finally, we outline future development directions, emphasizing the potential of ML in revolutionizing plasma research, improving operational efficiency, and opening new avenues in plasma technology.","PeriodicalId":20135,"journal":{"name":"Plasma Processes and Polymers","volume":"81 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141503510","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}
The present study examined the impact of dielectric barrier discharge cold plasma treatment on the physicochemical characteristics of taro peel starch (TPS) and its films. This work reports for the first time on using native and modified TPS in the casting procedure to develop packaging films. The results showed that, as plasma exposure voltage and treatment time prolonged, the pH, 955 cm−1/1022 cm−1, % crystallinity, and turbidity of TPS significantly decreased, while amylose content, solubility, and 1047 cm−1/1022 cm−1 of TPS increased considerably. Despite this, modified TPS‐based films have comparatively smooth and homogeneous surfaces. Moreover, the modified starch‐based film exhibited the lowest water vapor permeability, elongation at break, and solubility, while highest opacity and tensile strength.
{"title":"Dielectric barrier discharge plasma: A green and novel method to change the structure of taro peel starch and improve the physicochemical properties of taro peel starch films","authors":"Rakesh Kumar Gupta, Proshanta Guha, Prem Prakash Srivastav","doi":"10.1002/ppap.202400047","DOIUrl":"https://doi.org/10.1002/ppap.202400047","url":null,"abstract":"The present study examined the impact of dielectric barrier discharge cold plasma treatment on the physicochemical characteristics of taro peel starch (TPS) and its films. This work reports for the first time on using native and modified TPS in the casting procedure to develop packaging films. The results showed that, as plasma exposure voltage and treatment time prolonged, the pH, 955 cm<jats:sup>−1</jats:sup>/1022 cm<jats:sup>−1</jats:sup>, % crystallinity, and turbidity of TPS significantly decreased, while amylose content, solubility, and 1047 cm<jats:sup>−1</jats:sup>/1022 cm<jats:sup>−1</jats:sup> of TPS increased considerably. Despite this, modified TPS‐based films have comparatively smooth and homogeneous surfaces. Moreover, the modified starch‐based film exhibited the lowest water vapor permeability, elongation at break, and solubility, while highest opacity and tensile strength.","PeriodicalId":20135,"journal":{"name":"Plasma Processes and Polymers","volume":"22 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141503511","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}
Congfu Ran, Xiongfeng Zhou, Pan Dong, Kun Liu, Kostya (Ken) Ostrikov
To address the short lifetime of plasma‐activated water (PAW), this work reports on the application of ultralong‐lasting PAW for plant disease treatment. Compared with lettuce without ultralong‐lasting PAW treatment, the treated lettuce solution showed c. 1 log10 colony forming units mL−1 decrease in pathogens, as well as improvements in leaf area, leaf weight, root length, and root weight by 75%, 20%, 108.33%, and 150%, respectively. The leaf withering/root mortality rate of PAW‐treated plants was significantly lower than those of non‐PAW‐treated plants. Besides, disease defense‐related enzymes, such as catalase and β−1,3‐glucanase, were respectively enhanced by 112.5% and 5.13% in PAW‐treated lettuce, while the plant defense‐related genes were upregulated to respond to the pathogen's invasion.
{"title":"Ultralong‐lasting plasma‐activated water inhibits pathogens and improves plant disease resistance in soft rot‐infected hydroponic lettuce","authors":"Congfu Ran, Xiongfeng Zhou, Pan Dong, Kun Liu, Kostya (Ken) Ostrikov","doi":"10.1002/ppap.202400039","DOIUrl":"https://doi.org/10.1002/ppap.202400039","url":null,"abstract":"To address the short lifetime of plasma‐activated water (PAW), this work reports on the application of ultralong‐lasting PAW for plant disease treatment. Compared with lettuce without ultralong‐lasting PAW treatment, the treated lettuce solution showed <jats:italic>c</jats:italic>. 1 log<jats:sub>10</jats:sub> colony forming units mL<jats:sup>−1</jats:sup> decrease in pathogens, as well as improvements in leaf area, leaf weight, root length, and root weight by 75%, 20%, 108.33%, and 150%, respectively. The leaf withering/root mortality rate of PAW‐treated plants was significantly lower than those of non‐PAW‐treated plants. Besides, disease defense‐related enzymes, such as catalase and β−1,3‐glucanase, were respectively enhanced by 112.5% and 5.13% in PAW‐treated lettuce, while the plant defense‐related genes were upregulated to respond to the pathogen's invasion.","PeriodicalId":20135,"journal":{"name":"Plasma Processes and Polymers","volume":"18 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141529012","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}
Christian Orellana, Claudio González‐Fuentes, María Abellan, Rodrigo Segura, Simón Oyazrún, Cristian Acevedo, Christian Romero
There is an increasing interest in magnetic nanoparticles (MNPs) and self‐assembled MNP chains for applications in biomedicine, catalysis, and other technologically relevant applications. In this work, we report the spontaneous self‐assembly of MNPs at the top surface of the shield of a magnetron sputter head. The resulting nanostructures consisted of clustered nanoscale chains arranged in highly oriented microfibers, with lengths of micrometer order and diameters ranging from 20 to 600 nm. The intense magnetic field gradient around the sputter magnetron's head is the driving force of the self‐assembly process, also trapping species that would otherwise be lost in the carrier gas flow.
{"title":"Spontaneous self‐assembly of magnetic nanoparticle chains, at the first stage of a gas aggregation source","authors":"Christian Orellana, Claudio González‐Fuentes, María Abellan, Rodrigo Segura, Simón Oyazrún, Cristian Acevedo, Christian Romero","doi":"10.1002/ppap.202400002","DOIUrl":"https://doi.org/10.1002/ppap.202400002","url":null,"abstract":"There is an increasing interest in magnetic nanoparticles (MNPs) and self‐assembled MNP chains for applications in biomedicine, catalysis, and other technologically relevant applications. In this work, we report the spontaneous self‐assembly of MNPs at the top surface of the shield of a magnetron sputter head. The resulting nanostructures consisted of clustered nanoscale chains arranged in highly oriented microfibers, with lengths of micrometer order and diameters ranging from 20 to 600 nm. The intense magnetic field gradient around the sputter magnetron's head is the driving force of the self‐assembly process, also trapping species that would otherwise be lost in the carrier gas flow.","PeriodicalId":20135,"journal":{"name":"Plasma Processes and Polymers","volume":"2016 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140938737","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}
Roxanne Z. Walker, Sophia Gershman, Dorothy E. Doughty, John E. Foster
{"title":"Outside Front Cover: Plasma Process. Polym. 5/2024","authors":"Roxanne Z. Walker, Sophia Gershman, Dorothy E. Doughty, John E. Foster","doi":"10.1002/ppap.202370035","DOIUrl":"https://doi.org/10.1002/ppap.202370035","url":null,"abstract":"","PeriodicalId":20135,"journal":{"name":"Plasma Processes and Polymers","volume":"69 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140938740","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}
Yikang Jia, Tianyi Song, Yulin Dong, Xiangyu Wang, Rui Zhang, Pengyu Zhao, Sihong Ma, Kaiyu Li, Jin Liu, Guang Zeng, Zifeng Wang, Hao Zhang, Jishen Zhang, Li Guo, Dingxin Liu
Oral diseases stemming from oral pathogenic bacteria pose a significant global health concern, and current methods for managing these pathogens have limitations. Plasma‐activated water (PAW), containing various reactive species, emerges as a promising disinfectant with impressive inactivation capabilities. In this study, PAW prepared by mixed‐mode plasma‐activated gases was applied to inactivate oral pathogenic bacteria, including Streptococcus mutans and Porphyromonas gingivalis. The PAW could reduce more than 6.1‐log10 planktonic bacteria and 4.1‐log10 bacteria within biofilm, respectively, and PAW treatment of planktonic bacteria effectively inhibited biofilm formation. Compared to chlorhexidine, PAW exhibited superior inactivation effects in both planktonic bacteria and biofilm. This study presented a potent strategy for bacteria eradication to reduce the incidence of oral diseases.
{"title":"Efficient inactivation effect of plasma‐activated water on oral pathogens Streptococcus mutans and Porphyromonas gingivalis","authors":"Yikang Jia, Tianyi Song, Yulin Dong, Xiangyu Wang, Rui Zhang, Pengyu Zhao, Sihong Ma, Kaiyu Li, Jin Liu, Guang Zeng, Zifeng Wang, Hao Zhang, Jishen Zhang, Li Guo, Dingxin Liu","doi":"10.1002/ppap.202400048","DOIUrl":"https://doi.org/10.1002/ppap.202400048","url":null,"abstract":"Oral diseases stemming from oral pathogenic bacteria pose a significant global health concern, and current methods for managing these pathogens have limitations. Plasma‐activated water (PAW), containing various reactive species, emerges as a promising disinfectant with impressive inactivation capabilities. In this study, PAW prepared by mixed‐mode plasma‐activated gases was applied to inactivate oral pathogenic bacteria, including <jats:italic>Streptococcus mutans</jats:italic> and <jats:italic>Porphyromonas gingivalis</jats:italic>. The PAW could reduce more than 6.1‐log<jats:sub>10</jats:sub> planktonic bacteria and 4.1‐log<jats:sub>10</jats:sub> bacteria within biofilm, respectively, and PAW treatment of planktonic bacteria effectively inhibited biofilm formation. Compared to chlorhexidine, PAW exhibited superior inactivation effects in both planktonic bacteria and biofilm. This study presented a potent strategy for bacteria eradication to reduce the incidence of oral diseases.","PeriodicalId":20135,"journal":{"name":"Plasma Processes and Polymers","volume":"5 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140887740","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}
Silvie Müller, Eckhard Ströfer, Maximilian Kohns, Kerstin Münnemann, Erik von Harbou, Hans Hasse
In the present work, the application of dielectric barrier discharge (DBD) cold plasma technology for the partial oxidation of methane was systematically studied. Conversion of the reactants and selectivities were measured using an elaborate product analysis from a recent work by Müller et al. varying the reactant ratio in the feed, the mole fraction of the inert carrier gas argon in the feed, and the specific energy input at operating conditions close to ambient. The results from 20 new experiments carried out in the present work complement 23 previous experiments and provide an unprecedented comprehensive quantitative data set. This extends the available knowledge of partial oxidation of methane in DBD cold plasma considerably and is useful for testing mechanistic models.
{"title":"Conversions and selectivities in cold plasma partial oxidation of methane","authors":"Silvie Müller, Eckhard Ströfer, Maximilian Kohns, Kerstin Münnemann, Erik von Harbou, Hans Hasse","doi":"10.1002/ppap.202400027","DOIUrl":"https://doi.org/10.1002/ppap.202400027","url":null,"abstract":"In the present work, the application of dielectric barrier discharge (DBD) cold plasma technology for the partial oxidation of methane was systematically studied. Conversion of the reactants and selectivities were measured using an elaborate product analysis from a recent work by Müller et al. varying the reactant ratio in the feed, the mole fraction of the inert carrier gas argon in the feed, and the specific energy input at operating conditions close to ambient. The results from 20 new experiments carried out in the present work complement 23 previous experiments and provide an unprecedented comprehensive quantitative data set. This extends the available knowledge of partial oxidation of methane in DBD cold plasma considerably and is useful for testing mechanistic models.","PeriodicalId":20135,"journal":{"name":"Plasma Processes and Polymers","volume":"150 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140887761","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}
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