Download or read book Elimination of Volatile Organic Compounds by Non thermal Plasma Coupled with Photocatalysis written by Hathairat Muangsaen and published by . This book was released on 2013 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt: Degradation of toluene vapor, which was used as representative for volatile organic compounds (VOCs), by combination of non-thermal plasma and photocatalytic reaction, was investigated in this study. The degradation took place in a tubular flow reactor with an aluminum wire aligned at the center of the tube. The inner wall of the reactor was loaded with titanium dioxide photocatalyst. Non-thermal plasma was generated as corona discharge within the reactor. Wet air mixed with toluene vapor was supplied to the reactor, while the gas at the outlet of the reactor was analyzed by GC. The impact of the input electrical current on toluene removal efficiency was investigated. The degradation was found to improve with an increase in the electrical current. Synergistic effect can be obtained from the combination of photocatalytic reaction and non-thermal plasma. Moreover, both oxygen and water play a considerable role in both processes. Oxygen is regularly related in the photocatalytic reduction as the electron acceptor whereas water participates in the formation of more highly reactive radicals. However, large amount of water gives negative results due to the competitive adsorption on the photocatalyst surface and also poisons the photocatalyst. Additionally, it was found that the photocatalytic process also increased carbon dioxide yield.

Download or read book Photocatalysis Fundamental Processes and Applications written by Mehrorang Ghaedi and published by Academic Press. This book was released on 2021-03-19 with total page 954 pages. Available in PDF, EPUB and Kindle. Book excerpt: Photocatalysis: Fundamental Processes and Applications, Volume 32 in the Interface Science and Technology Series, discusses the fundamental aspects of photocatalysis and its process and applications to the decontamination of wastewater, hydrogen production via water splitting, and photo reduction of carbon dioxide to hydrocarbon. The book discusses the fundamental aspects of all applications together with their proper mechanisms, thus providing essential information for deep research in the area of clean environment and green energy production. - Provides background on the fundamental and experimental processes of photocatalysis - Covers photocatalysis and its impact on creating a clean environment and energy sources - Applies photocatalysis to the decontamination of wastewater, hydrogen production via water splitting, and photo reduction of carbon dioxide to hydrocarbon - Edited by a world-leading researcher in interface science

Download or read book Plasma for Energy and Catalytic Nanomaterials written by Lanbo Di and published by MDPI. This book was released on 2020-12-29 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Special Issue “Plasma for Energy and Catalytic Nanomaterials” highlights the recent progress and advancements in the synthesis and applications of energy and catalytic nanomaterials by plasma. Compared with conventional preparation methods, plasma provides a fast, facile, and environmentally friendly method for synthesizing highly efficient nanomaterials. The synthesized nanomaterials generally show enhanced metal–support interactions, small-sized metal nanoparticles, specific metal structures, and abundant oxygen vacancies. The plasma method allows thermodynamically and dynamically difficult reactions to proceed at low temperatures due to the activation of energetic electrons. Despite the growing interest in plasma for energy and catalytic nanomaterials, the synthesis mechanisms of nanomaterials using plasma still remain obscure due to the complicated physical and chemical reactions that occur during plasma preparation. The Guest Editors and the MDPI staff are therefore pleased to offer this Special Issue to interested reader, including graduate and Ph.D. students, postdoctoral researchers, and the entire community interested in the field of nanomaterials. We share the conviction that the Issue can serve as a useful tool for updating the literature and to aid with the conception of new production and/or research programs. Further dedicated R&D advances are possible based on new instruments and materials under development.

Download or read book Nanomaterials for Air Remediation written by Abdeltif Amrane and published by Micro and Nano Technologies. This book was released on 2020-01-17 with total page 420 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nanomaterials for Air Remediation provides a comprehensive description of basic knowledge and current research progress in the field of air treatment using nanomaterials. The book explores how nanomaterials are used in various air remediation techniques, including advanced oxidation processes, biological processes, and filtration. It also covers their combined use as nanocatalysts, nanoantibiotics, nanoadsorbents, nanocontainers, nanofiltrations and nanosensors. Major challenges to using nanomaterials for improving air quality on a mass scale, both practical and regulatory, are also presented. This is an important resource for materials scientists and environmental engineers who are looking to understand how nanotechnology is used to enhance air quality. Includes coverage of a wide range of nanomaterials, from biochemical to chemical materials, and nanomaterials supported photocatalysts Discusses how the properties of nanomaterials are being used to make more efficient air purification systems and products Assesses the practical and regulatory challenges of using different types of nanomaterials for air remediation

Download or read book Non thermal Atmospheric Pressure Plasma for Remediation of Volatile Organic Compounds written by Zaenab Abd Allah and published by . This book was released on 2012 with total page 217 pages. Available in PDF, EPUB and Kindle. Book excerpt: Non-thermal plasma generated in a dielectric barrier packed-bed reactor has been used for the remediation of chlorinated volatile organic compounds. Chlorinated VOCs are important air pollutant gases which affect both the environment and human health. This thesis uses non-thermal plasma generated in single and multiple packed-bed plasma reactors for the decomposition of dichloromethane (CH2Cl2, DCM) and methyl chloride (CH3Cl). The overall aim of this thesis is to optimize the removal efficiency of DCM and CH3Cl in air plasma by investigating the influence of key process parameters. This thesis starts by investigating the influence of process parameters such as oxygen concentration, initial VOC concentration, energy density, and plasma residence time and background gas on the removal efficiency of both DCM and CH3Cl. Results of these investigations showed maximum removal efficiency with the addition of 2 to 4 % oxygen to nitrogen plasma. Oxygen concentrations in excess of 4 % decreased the decomposition of chlorinated VOCs as a result of ozone and NOx formation. This was improved by adding an alkene, propylene (C3H6), to the gas stream. With propylene additives, the maximum remediation of DCM was achieved in air plasma. It is thought that adding propylene resulted in the generation of more active radicals that play an important role in the decomposition process of DCM as well as a further oxidation of NO to NO2. Results in the single bed also showed that increasing the residence time increased the removal efficiency of chlorinated VOCs in plasma. This was optimized by designing a multiple packed-bed reactor consisting of three packed-bed cells in series, giving a total residence time of 4.2 seconds in the plasma region of the reactor. This reactor was used for both the removal of DCM, and a mixture of DCM and C3H6 in a nitrogen-oxygen gas mixture. A maximum removal efficiency of about 85 % for DCM was achieved in air plasma with the use of three plasma cells and the addition of C3H6 to the gas stream. Nitrogen oxides are air pollutants which are formed as by-products during the decomposition of chlorinated VOCs in plasmas containing nitrogen and oxygen. Results illustrate that the addition of a mixture of DCM and C3H6 resulted in the formation of the lowest concentration of nitric oxide, whilst the total nitrogen oxides concentrations did not increase. A summary of the findings of this work is presented in chapter eight as well as further work. To conclude, the maximum removal efficiency of dichloromethane was achieved in air plasma with the addition of 1000 ppm of propylene and the use of three packed-bed plasma cells in series. The lowest concentration of nitric oxide was formed in this situation.

Download or read book Plasma Catalysis written by Annemie Bogaerts and published by MDPI. This book was released on 2019-04-02 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: Plasma catalysis is gaining increasing interest for various gas conversion applications, such as CO2 conversion into value-added chemicals and fuels, N2 fixation for the synthesis of NH3 or NOx, methane conversion into higher hydrocarbons or oxygenates. It is also widely used for air pollution control (e.g., VOC remediation). Plasma catalysis allows thermodynamically difficult reactions to proceed at ambient pressure and temperature, due to activation of the gas molecules by energetic electrons created in the plasma. However, plasma is very reactive but not selective, and thus a catalyst is needed to improve the selectivity. In spite of the growing interest in plasma catalysis, the underlying mechanisms of the (possible) synergy between plasma and catalyst are not yet fully understood. Indeed, plasma catalysis is quite complicated, as the plasma will affect the catalyst and vice versa. Moreover, due to the reactive plasma environment, the most suitable catalysts will probably be different from thermal catalysts. More research is needed to better understand the plasma–catalyst interactions, in order to further improve the applications.

Download or read book Comparison of Non thermal Plasma Techniques for Abatement of Volatile Organic Compounds and Nitrogen Oxides written by and published by . This book was released on 1996 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Plasma Chemistry and Catalysis in Gases and Liquids written by Vasile I. Parvulescu and published by John Wiley & Sons. This book was released on 2013-03-19 with total page 423 pages. Available in PDF, EPUB and Kindle. Book excerpt: Filling the gap for a book that covers not only plasma in gases but also in liquids, this is all set to become the standard reference for this topic. It provides a broad-based overview of plasma-chemical and plasmacatalytic processes generated by electrical discharges in gases, liquids and gas/liquid environments in both fundamental and applied aspects by focusing on their environmental and green applications and also taking into account their practical and economic viability. With the topics addressed by an international group of major experts, this is a must-have for scientists, engineers, students and postdoctoral researchers specializing in this field.

Download or read book Advanced Technologies for Solid Liquid and Gas Waste Treatment written by Saleh Al Arni and published by CRC Press. This book was released on 2023-04-05 with total page 353 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advanced Technologies for Solid, Liquid, and Gas Waste Treatment presents the potential of using advanced and emerging technologies to effectively treat waste. This book uniquely addresses treatment techniques for waste in all three phases, solid, liquid, and gas, with the goals of mitigating negative impacts of waste and producing valued-added products, such as biogas and fertilizer, as well as the use of artificial intelligence in the field. • Covers a wide range of advanced and emerging treatment technologies such as photocatalysis processing, adsorptive membranes, pyrolysis, advanced oxidation process, electrocoagulation, composting technologies, etc. • Addresses issues associated with wastes in different phases. • Discusses the pros and cons of treatment technologies for handling different wastes produced by different industrial processes, such as agricultural biomass, industrial/domestic solid wastes, wastewater, and hazardous gas. • Includes application of artificial intelligence in treatment of electronic waste. This book will appeal to chemical, civil, and environmental engineers working on waste treatment, waste valorization, and pollution control.

Download or read book Chemistry Emission Control Radioactive Pollution and Indoor Air Quality written by Nicolas Mazzeo and published by BoD – Books on Demand. This book was released on 2011-07-27 with total page 696 pages. Available in PDF, EPUB and Kindle. Book excerpt: The atmosphere may be our most precious resource. Accordingly, the balance between its use and protection is a high priority for our civilization. While many of us would consider air pollution to be an issue that the modern world has resolved to a greater extent, it still appears to have considerable influence on the global environment. In many countries with ambitious economic growth targets the acceptable levels of air pollution have been transgressed. Serious respiratory disease related problems have been identified with both indoor and outdoor pollution throughout the world. The 25 chapters of this book deal with several air pollution issues grouped into the following sections: a) air pollution chemistry; b) air pollutant emission control; c) radioactive pollution and d) indoor air quality.

Download or read book Plasma catalytic Processes with Copper Manganese Oxide Catalysts for the Abatement of Volatile Organic Compounds written by Zhiping Ye and published by . This book was released on 2017 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Release of volatile organic compounds (VOCs) laden air into the environment contributes to the formation of tropospheric ozone, photochemical smog, enhancing the greenhouse effect and the destruction of the stratospheric ozone layer. Moreover, most of them are hazardous for human being. Non-thermal plasma techniques (NTPs) offer interesting perspectives for the removal of low concentrations of pollutants in air at high flow rates. However undesired by-product formation hinders its use in industrial applications. In contrast, the combination of NTP with a selective catalyst (plasma-catalysis) can be an attractive alternative. An overview of the present state of knowledge using MnOx based catalysts for toluene abatement in post-plasma catalysis (PPC) configuration is first of all herein given. Toluene decomposition in moist air with glass beads packed bed dielectric barrier discharge (DBD) cylindrical reactor alone, first step before combining it with a catalyst, has been studied and the role of water has been clarified. Concomitantly toluene total oxidation has been investigated on CuMnOx catalysts prepared by recent synthesis routes. These catalysts were finally integrated in a post-plasma catalysis PPC configuration using a 10-pin-to-plate negative DC corona discharge to be tested in trichloroethylene (TCE) abatement. For each process of VOC abatement used herein, the advantages and drawbacks have been particularly highlighted.

Download or read book Catalysis for a Sustainable Environment written by Armando J. L. Pombeiro and published by John Wiley & Sons. This book was released on 2024-01-02 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt: Interdisciplinary approach to sustainability, illustrating current catalytic approaches in applied chemistry, chemical engineering, and materials science Catalysis for a Sustainable Environment covers the use of catalysis in its various approaches, including homogeneous, supported, and heterogeneous catalysis, and photo- and electrocatalysis, towards sustainable environmental benefits. The text fosters interdisciplinarity in sustainability by illustrating modern perspectives in catalysis, from fields including inorganic, organic, organometallic, bioinorganic, pharmacological, and analytical chemistry, along with chemical engineering and materials science. The chapters are grouped in seven sections on (i) Carbon Dioxide Utilization, (ii) Volatile Organic Compounds (VOCs) Transformation, (iii) Carbon-based Catalysis, (iv) Coordination, Inorganic, and Bioinspired Catalysis, (v) Organocatalysis, (vi) Catalysis for Water and Liquid Fuels Purification, and (vii) Hydrogen Formation/Storage. Sample topics covered in Catalysis for a Sustainable Environment include: Activation of relevant small molecules with strong environmental impact and carbon-based catalysts for sustainable chemical processes Catalytic synthesis of important added value organic compounds, in both commodity and fine chemistries (large and small scale productions, respectively) Development of catalytic systems operating under environmentally benign and mild conditions towards the establishment of sustainable energy processes Catalysis by coordination, metal and metal-free compounds, MOFs (metal-organic frameworks) and nanoparticles, and their contribution to environmental and sustainable processes Employing the latest approaches that impact global and circular economies, Catalysis for a Sustainable Environment serves as an excellent starting point for innovative catalytic approaches, and will appeal to professionals in engineering, academia, and industry who wish to improve existing processes and materials.

Download or read book Non thermal Plasma Techniques for Abatement of Volatile Organic Compounds and Nitrogen Oxides written by and published by . This book was released on 1995 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book No thermal Plasma Processing of VOCs and NO subscript X at LLNL written by and published by . This book was released on 1995 with total page 23 pages. Available in PDF, EPUB and Kindle. Book excerpt: For the past few years, Lawrence Livermore National Laboratory has been conducting a comprehensive research program on the application of non-thermal plasmas for air pollution control and abatement. This program combines an extensive modeling effort with an experimental facility and test program. We believe that there are two major issues to be addressed in order to apply non-thermal plasma processing to air pollution control; these are electrical energy consumption and byproduct identification. The thrust of our work has been to understand the scalability of the non-thermal process by focusing on the energy efficiency of the non-thermal process and to identify the byproducts to ensure that effluent gases from a non-thermal processor are benign. We have compared different types of electrical discharge reactors both theoretically and experimentally. Our interests in the application of non-thermal plasmas vary from the destruction of volatile organic compounds (VOCs) to NO(subscript x) reduction for mobile applications. This paper will discuss the processing of both NO(subscript x) and VOCs by non-thermal plasmas at LLNL.

Download or read book Cold Plasma in Food and Agriculture written by NN Misra and published by Academic Press. This book was released on 2016-07-15 with total page 382 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cold Plasma in Food and Agriculture: Fundamentals and Applications is an essential reference offering a broad perspective on a new, exciting, and growing field for the food industry. Written for researchers, industry personnel, and students interested in nonthermal food technology, this reference will lay the groundwork of plasma physics, chemistry, and technology, and their biological applications. Food scientists and food engineers interested in understanding the theory and application of nonthermal plasma for food will find this book valuable because it provides a roadmap for future developments in this emerging field. This reference is also useful for biologists, chemists, and physicists who wish to understand the fundamentals of plasma physics, chemistry, and technology and their biological interactions through applying novel plasma sources to food and other sensitive biomaterials. Examines the topic of cold plasma technology for food applications Demonstrates state-of-the-art developments in plasma technology and potential solutions to improve food safety and quality Presents a solid introduction for readers on the topics of plasma physics and chemistry that are required to understand biological applications for foods Serves as a roadmap for future developments for food scientists, food engineers, and biologists, chemists, and physicists working in this emerging field

Download or read book Plasma Catalysis written by Xin Tu and published by Springer Nature. This book was released on 2019-11-21 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a comprehensive overview of the field of plasma catalysis, regarded as a promising alternative to thermal processes for energy and environmental applications. It bridges the gap between the plasma and catalysis research communities, covering both the fundamentals of plasma catalysis and its application in environmental and energy research. The first section of the book offers a broad introduction to plasma catalysis, covering plasma-catalyst systems, interactions, and modeling. The core of the book then focuses on different applications, describing a wide range of plasma-catalytic processes in catalyst synthesis, environmental clean-up, greenhouse gas conversion and synthesis of materials for energy applications. Chapters cover topics ranging from removal of NOx and VOCs to conversion of methane, carbon dioxide and the reforming of ethanol and methanol. Written by a group of world-leading researchers active in the field, the book forms a valuable resource for scientists, engineers and students with different research backgrounds including plasma physics, plasma chemistry, catalysis, energy, environmental engineering, electrical engineering and material engineering.

Download or read book Hybrid and Combined Processes for Air Pollution Control written by Aymen Amine Assadi and published by Elsevier. This book was released on 2022-05-19 with total page 378 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hybrid and Combined Processes for Air Pollution Control: Methodologies, Mechanisms and Effect of Key Parameters provides an exhaustive inventory of hybrid and combined processes in the field of air treatment. The book covers principles, the effect of key parameters, technologies and reactors of the processes and their implementation, from lab-scale to industrial scale, also identifying future trends. Sections discuss effects on the environment and living beings, identify novel techniques and innovations, and offer a thorough assessment of the strengths and weaknesses of each. In this well-structured book, chapters are linked to the type of treatment, with a significant part dealing with treatment by transfer processes: (absorption and absorption) and on destruction treatments, such as advanced oxidation processes. - Helps readers select the most appropriate process for air pollution treatment and control - Provides a comprehensive overview of process performance under real conditions, from lab to industrial scale - Identifies future trends in industrial developments and innovation