Download or read book Long term Performance of Activated Carbon in Cyclic Adsorption regeneration of VOCs written by Amin Sadeghi Ardekani and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Activated carbon (AC) has attracted tremendous interest in adsorption-based air treatment. Nonetheless, a major challenge associated with the use of ACs is the decline in adsorption capacity with time due to heel build-up (i.e., accumulation of non-desorbed species). Designing a reliable adsorption system requires a deeper understanding of the changes occurring during the long-term use of ACs. For this purpose, the effect of ACs' properties such as porosity and operational conditions such as purge gas flow rate on the long-term performance of ACs requires further investigation. The objective of the present work was two-fold: first, to study the simultaneous effect of purge gas flowrate and activated carbon's porosity during prolonged cyclic adsorption/regeneration of three different ACs. Secondly, develop a model that can predict the long-term performance of ACs during adsorption/regeneration of a representative volatile organic compound (VOC). This section itself comprised two main stages: 1) Modeling the impact of heel on AC's pore size distribution (PSD), adsorption isotherm, and capacity, and 2) verifying the model using cyclic adsorption-desorption of 1,2,4-trimethyl benzene (TMB). The model predicts the cyclic adsorption capacity of AC by applying the Dubinin-Radushkevich-Langmuir (D-R-L) isotherm based on AC's limiting pore volume and adsorbate-adsorbent affinity coefficient. For the long-term experimental study, six scenarios were investigated by varying the dry air purge gas flow rates 0.5 and 5 SLPM and the porosity of adsorbent used (44%, 60%, and 86% microporosity). The cyclic adsorption/regeneration experiment results indicated that the cumulative heel and the adsorption capacity followed ascending and descending trends with cycle number, respectively. Initially, the porosity and micropore volume of the adsorbents played a more important role in their performance. However, at higher cycle numbers, the effect of purge gas flow rate was more determinant in the performance of ACs. In the first five cycles, the two adsorbents with the highest micropore volume, G-70R, and B101412, showed similar heel build-up formation rates while B100772 with lower micropore volume (0.43 (cm^3)/g as opposed to 0.50(cm^3)/g) had slightly lower heel build-up. Alternatively, at the 20th cycle, purge gas flow rate had a clear effect on the performance and cumulative heel build-up of all three ACs regardless of their porosity. For all three adsorbents used in this study, samples regenerated with 0.5 SLPM all had an average cumulative heel of 31%. Those regenerated with 5 SLPM Had a cumulative heel build-up average of 21%. The presence of mesopores and a hierarchal pore structure certainly helped reduce heel build-up in the micropores. DTG analysis of the samples showed that with an increase in purge gas flow rate, the nature of heel build-up starts to change and transform into heavier chemically formed compounds. In the second part, two machine learning (ML) algorithms, multivariate linear regression (MLR) and Decision tree, were applied to predict Micropore volume reduction because of volatile organic compounds (VOCs) cyclic heel build-up on activated carbons (ACs). A dataset of 100 experimental tests of cyclic adsorption/regeneration of different VOCs on ACs with distinct properties was used. It was observed that micropore volume reduction could be predicted with acceptable accuracy with an R2 of 0.85 ± 0.08 using the MLR algorithm by considering the adsorbent characteristics, adsorbate properties, and regeneration conditions. The micropores prediction results were then combined with several mathematical equations to predict the pore size distribution of a used activated carbon. To verify the model, its results were tested against nine samples with various stages of heel build-up. The micropore and PSD were predicted with a mean relative absolute error (MRAE) of 3.5%, 10.8%, and 12.0% for G-70R, B101412, and B100772, respectively. The PSD prediction model was then utilized in conjunction with the DRL isotherm prediction model, and the adsorption capacity of samples at five concentrations of 0, 50, 100, 500, and 1000 ppm were predicted for each adsorbent. The prediction of adsorption capacity on the virgin G-70R, B101412, and B100772 had a MRAE of 0.6%, 8.9%, and 2.7, respectively while for the corresponding used samples the MRAE was 13.2%, 10.1%, and 10.0%. The results of this study are beneficial in improving the long-term performance of activated carbons and making them last longer.
Download or read book Characterizing the Hydrophobic Properties of Activated Carbon and the Factors Affecting VOC Adsorption written by Steven M. Sheets and published by . This book was released on 2015 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: Regeneration is vital to the life cycle of adsorbents such as activated carbon. Regeneration losses, in the forms of adsorbent mass and adsorption capacity, have long plagued the life-cycle of conventional adsorbents. Adsorption losses are compounded by the presence of moisture in exhaust gas streams during VOC treatment, due to the competition for adsorbent sites between water and VOCs. Since water vapor often out-competes the VOCs for these sites, the carbon's loss of adsorption capacity can be attributed to water's affinity to the carbon surface. The present research explores the hypothesis that selective organic phase adsorbents can be produced by designing the substrate material such that it exhibits hydrophobicity and selectivity for organic vapors. At the time of writing, this study is still in the design phase. An on-line apparatus, currently being developed for lab-scale use, is theorized for the continuous measurement of VOC concentrations under varying relative humidity conditions. This work aims to advance adsorption science for environmental applications, as it has the potential to provide a new class of gas phase adsorbents, advance polymer composite adsorbent manufacturing methods, and develop a novel adsorbent design approach using ground-up methodology rather than an empirical approach. Two additional research projects, to which the author provided support, are also described in brief.
Download or read book Activated Carbon Adsorption For Wastewater Treatment written by Jerry. R. Perrich and published by CRC Press. This book was released on 2018-01-18 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume is a guide to the state of the art of activated carbon adsorption technology as applied to wastewater treatment. This book surveys this body of knowledge and is a detailed description of current technology.
Download or read book Handbook of Clean Energy Systems 6 Volume Set written by Jinyue Yan and published by John Wiley & Sons. This book was released on 2015-06-22 with total page 4038 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Handbook of Clean Energy Systems brings together an international team of experts to present a comprehensive overview of the latest research, developments and practical applications throughout all areas of clean energy systems. Consolidating information which is currently scattered across a wide variety of literature sources, the handbook covers a broad range of topics in this interdisciplinary research field including both fossil and renewable energy systems. The development of intelligent energy systems for efficient energy processes and mitigation technologies for the reduction of environmental pollutants is explored in depth, and environmental, social and economic impacts are also addressed. Topics covered include: Volume 1 - Renewable Energy: Biomass resources and biofuel production; Bioenergy Utilization; Solar Energy; Wind Energy; Geothermal Energy; Tidal Energy. Volume 2 - Clean Energy Conversion Technologies: Steam/Vapor Power Generation; Gas Turbines Power Generation; Reciprocating Engines; Fuel Cells; Cogeneration and Polygeneration. Volume 3 - Mitigation Technologies: Carbon Capture; Negative Emissions System; Carbon Transportation; Carbon Storage; Emission Mitigation Technologies; Efficiency Improvements and Waste Management; Waste to Energy. Volume 4 - Intelligent Energy Systems: Future Electricity Markets; Diagnostic and Control of Energy Systems; New Electric Transmission Systems; Smart Grid and Modern Electrical Systems; Energy Efficiency of Municipal Energy Systems; Energy Efficiency of Industrial Energy Systems; Consumer Behaviors; Load Control and Management; Electric Car and Hybrid Car; Energy Efficiency Improvement. Volume 5 - Energy Storage: Thermal Energy Storage; Chemical Storage; Mechanical Storage; Electrochemical Storage; Integrated Storage Systems. Volume 6 - Sustainability of Energy Systems: Sustainability Indicators, Evaluation Criteria, and Reporting; Regulation and Policy; Finance and Investment; Emission Trading; Modeling and Analysis of Energy Systems; Energy vs. Development; Low Carbon Economy; Energy Efficiencies and Emission Reduction. Key features: Comprising over 3,500 pages in 6 volumes, HCES presents a comprehensive overview of the latest research, developments and practical applications throughout all areas of clean energy systems, consolidating a wealth of information which is currently scattered across a wide variety of literature sources. In addition to renewable energy systems, HCES also covers processes for the efficient and clean conversion of traditional fuels such as coal, oil and gas, energy storage systems, mitigation technologies for the reduction of environmental pollutants, and the development of intelligent energy systems. Environmental, social and economic impacts of energy systems are also addressed in depth. Published in full colour throughout. Fully indexed with cross referencing within and between all six volumes. Edited by leading researchers from academia and industry who are internationally renowned and active in their respective fields. Published in print and online. The online version is a single publication (i.e. no updates), available for one-time purchase or through annual subscription.
Download or read book Carbon Reactivation by Externally fired Rotary Kiln Furnace written by Ching-lin Chen and published by . This book was released on 1980 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Activated Carbon Adsorption written by Roop Chand Bansal and published by CRC Press. This book was released on 2005-05-24 with total page 498 pages. Available in PDF, EPUB and Kindle. Book excerpt: High surface area, a microporous structure, and a high degree of surface reactivity make activated carbons versatile adsorbents, particularly effective in the adsorption of organic and inorganic pollutants from aqueous solutions. Activated Carbon Adsorption introduces the parameters and mechanisms involved in the activated carbon adsorption
Download or read book Thermal Regeneration of Activated Carbon written by Louis Hemphill and published by . This book was released on 1978 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advances in Sonochemistry written by T.J. Mason and published by Elsevier. This book was released on 1996-06-25 with total page 313 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in Sonochemistry
Download or read book Activated Carbon Surfaces in Environmental Remediation written by Teresa J. Bandosz and published by Elsevier. This book was released on 2006-02-27 with total page 587 pages. Available in PDF, EPUB and Kindle. Book excerpt: Activated Carbon Surfaces in Environmental Remediation provides a comprehensive summary of the environmental applications of activated carbons. In order to understand the removal of contaminants and pollutants on activated carbons, the theoretical bases of adsorption phenomena are discussed. The effects of pore structure and surface chemistry are also addressed from both science and engineering perspectives. Each chapter provides examples of real applications with an emphasis on the role of the carbon surface in adsorption or reactive adsorption. The practical aspects addressed in this book cover the broad spectrum of applications from air and water cleaning and energy storage to warfare gas removal and biomedical applications. This book can serve as a handbook or reference book for graduate students, researchers and practitioners with an interest in filtration, water treatment, adsorbents and air cleaning, in addition to environmental policies and regulations. Addresses fundamental carbon science and how it relates to applications of carbon surfaces Describes the broad spectrum of activated carbon applications in environmental remediation Serves as a handbook or reference book for graduate students, researchers and practitioners in the field
Download or read book Adsorption of Volatile Organic Compounds and Microwave Regeneration on Beaded Activated Carbon written by 蕭世盈 and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book ACTIVATED CARBON ADSORPTION FOR WASTEWATER TREATMENT written by Jerry R. Perrich and published by Springer. This book was released on 1981-06-10 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wastewater characteristics and treatment. Activated carbon. Activated carbon adsorption. Development of design parameters. Contacting systems. Regeneration systems. Total process design and economics. Component equipament design. A guideline to operational procedures and design for granular carbon systems wastewater applications. Safety aspecs of activated carbon technology.
Download or read book Purification with Activated Carbon written by John W. Hassler and published by . This book was released on 1974 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written by a pioneers who developed the original process to manufacture carbon in the United States, this book is considered essential reading for professionals involved in the removal from air or water by using the most important single pollution control product ever invented. Contents: Part I Introduction - Chapter 1: History and Market Review - Chapter 2: Elementary Aspects of Adsorption - Part II Application To Industrial and Environmental Liquid Systems - Chapter 3: Basic Aspects and Concepts - Chapter 4: Interpretation and Evaluation of Adsorption Data - Chapter 5: Adsorption-Desorption Operations - Chapter 6: Unit Operations - Chapter 7: Representative Industrial Applications - Chapter 8: Purification Domestic and Industrial Waste Waters - Part III Applications to Other Systems - Chapter 9: Gas and Vapor Phase Application - Chapter 10: Diverse Applications - Part IV Preparation of Activated Carbon and Physico-Chemical Properties - Chapter 11: Manufacture of Activated Carbon - Chapter 12: Regeneration - Chapter 13: Nature of Activated Carbon - Chapter 14: Contact Catalysis - Part V Biochemical Properties - Chapter 15: Biochemical Aspects of Activated Carbon - Part VI Laboratory Procedures - Chapter 16: Adsorption of Gases and Vapors Laboratory Procedures - Chapter 17: Laboratory Adsorption Test Procedure for Liquid Systems - Chapter 18: General Properties of Activated Carbons - Part VII - Chapter 19: Final Gleanings - Index
Download or read book Carbon Adsorption for Pollution Control written by Nicholas P. Cheremisinoff and published by Prentice Hall. This book was released on 1993 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt: Deals with the treatment of liquids, gas phase adsorption, air pollution control, treatment of hazardous wastes, carbon regeneration, controls, and safety.
Download or read book Aerospace Environmental Technology Conference written by Ann F. Whitaker and published by . This book was released on 1995 with total page 686 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Recent Advances in Adsorption Processes for Environmental Protection and Security written by José Paulo Mota and published by Springer Science & Business Media. This book was released on 2007-10-30 with total page 201 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of the Workshop was to share knowledge on the latest advances on adsorption processes for environmental security and protection, as well as to disseminate the main results and achievements of recent NATO Science-for-Peace projects on environmental security and protection. This volume provides a comprehensive report on adsorption and colloids phenomena, carbon materials and adsorbents for various industrial applications, ecological safety and antiterrorism.
Download or read book Advanced Oxidation Processes for Water and Wastewater Treatment written by Simon Parsons and published by IWA Publishing. This book was released on 2004-03-01 with total page 370 pages. Available in PDF, EPUB and Kindle. Book excerpt: The suitability of Advanced Oxidation Processes (AOPs) for pollutant degradation was recognised in the early 1970s and much research and development work has been undertaken to commercialise some of these processes. AOPs have shown great potential in treating pollutants at both low and high concentrations and have found applications as diverse as ground water treatment, municipal wastewater sludge destruction and VOCs control. Advanced Oxidation Processes for Water and Wastewater Treatment is an overview of the advanced oxidation processes currently used or proposed for the remediation of water, wastewater, odours and sludge. The book contains two opening chapters which present introductions to advanced oxidation processes and a background to UV photolysis, seven chapters focusing on individual advanced oxidation processes and, finally, three chapters concentrating on selected applications of advanced oxidation processes. Advanced Oxidation Processes for Water and Wastewater Treatment will be invaluable to readers interested in water and wastewater treatment processes, including professionals and suppliers, as well as students and academics studying in this area. Dr Simon Parsons is a Senior Lecturer in Water Sciences at Cranfield University with ten years' experience of industrial and academic research and development.
Download or read book Activated Carbon for Water Treatment written by H. Sontheimer and published by American Water Works Association. This book was released on 1988 with total page 752 pages. Available in PDF, EPUB and Kindle. Book excerpt:
