Moving Bed Temperature Swing Adsorption Processes for Post-combustion CO2 Capture PDF Download
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Author: Bishan Meghani
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Bishan Meghani
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Ralph T. Yang
Publisher: Butterworth-Heinemann
ISBN: 1483162664
Category : Technology & Engineering
Languages : en
Pages : 363
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Book Description
Gas Separation by Adsorption Processes provides a thorough discussion of the advancement in gas adsorption process. The book is comprised of eight chapters that emphasize the fundamentals concept and principles. The text first covers the adsorbents and adsorption isotherms, and then proceeds to detailing the equilibrium adsorption of gas mixtures. Next, the book covers rate processes in adsorbers and adsorber dynamics. The next chapter discusses cyclic gas separation processes, and the remaining two chapters cover pressure-swing adsorption. The book will be of great use to students, researchers, and practitioners of disciplines that involve gas separation processes, such as chemical engineering.
Author: Augustine Ntiamoah
Publisher:
ISBN:
Category : Carbon dioxide
Languages : en
Pages : 147
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Book Description
Author: Tran Thanh Tai Nguyen
Publisher:
ISBN:
Category : Adsorption
Languages : en
Pages : 0
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Book Description
Carbon capture utilization and storage (CCUS) play a crucial contribution in reducing CO2 emissions and obtaining net-zero emission by 2050. Adsorbent-based technology offers an opportunity to separate CO2 under mild regeneration conditions. However, low CO2 concentration and water vapour in the flue gas make it challenging to separate CO2. In this thesis, CALF-20, a water-stable metal-organic framework (MOF), was characterized and demonstrated for humid post-combustion CO2 capture. Single-component CO2 and N2 isotherms were measured at various pressures and temperatures using volumetric and gravimetric methods. The dual-site Langmuir model was used to describe the CO2 and N2 isotherms. The adsorption equilibrium of water was measured from 0%-100% relative humidity (RH) at various temperatures using thermogravimetry analysis and volumetric methods. A hysteresis loop was observed from 8%-22% RH. The Quadratic-Langmuir model was used to describe water isotherms. The competitive loadings of CO2 and N2 were quantified by performing both adsorption and desorption dynamic column breakthrough (DCB) experiments. The CO2 loading barely changed under the competition of N2. The adsorption and desorption DCB of water were also performed. Multiple transitions corresponding to the shape of the isotherm were observed in the water DCB curves. A one-dimensional column model, including all dispersion, convection, heat transfer and pressure drop, was used to describe the adsorption dynamic in the column. The competitive loadings of CO2 and H2O were collected using both thermogravimetry analysis and dynamic column breakthrough techniques. At RH
Author: Shin-ichi Nakao
Publisher: Springer
ISBN: 3030188582
Category : Technology & Engineering
Languages : en
Pages : 90
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Book Description
This book summarises the advanced CO2 capture technologies that can be used to reduce greenhouse gas emissions, especially those from large-scale sources, such as power-generation and steel-making plants. Focusing on the fundamental chemistry and chemical processes, as well as advanced technologies, including absorption and adsorption, it also discusses other aspects of the major CO2 capture methods: membrane separation; the basic chemistry and process for CO2 capture; the development of materials and processes; and practical applications, based on the authors’ R&D experience. This book serves as a valuable reference resource for researchers, teachers and students interested in CO2 problems, providing essential information on how to capture CO2 from various types of gases efficiently. It is also of interest to practitioners and academics, as it discusses the performance of the latest technologies applied in large-scale emission sources.
Author: David Reay
Publisher: Butterworth-Heinemann
ISBN: 0080983057
Category : Technology & Engineering
Languages : en
Pages : 624
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Book Description
Process Intensification: Engineering for Efficiency, Sustainability and Flexibility is the first book to provide a practical working guide to understanding process intensification (PI) and developing successful PI solutions and applications in chemical process, civil, environmental, energy, pharmaceutical, biological, and biochemical systems. Process intensification is a chemical and process design approach that leads to substantially smaller, cleaner, safer, and more energy efficient process technology. It improves process flexibility, product quality, speed to market and inherent safety, with a reduced environmental footprint. This book represents a valuable resource for engineers working with leading-edge process technologies, and those involved research and development of chemical, process, environmental, pharmaceutical, and bioscience systems. - No other reference covers both the technology and application of PI, addressing fundamentals, industry applications, and including a development and implementation guide - Covers hot and high growth topics, including emission prevention, sustainable design, and pinch analysis - World-class authors: Colin Ramshaw pioneered PI at ICI and is widely credited as the father of the technology
Author: Gang Li
Publisher:
ISBN:
Category :
Languages : en
Pages : 422
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Book Description
VSA (Vacuum Swing Adsorption) is a promising technology for capturing CO2 which is known to contribute to global warming. Capture of CO2 from flue gas streams using adsorption processes must deal with the prospect of high humidity streams containing bulk CO2 as well as other impurities such as SOx, NOx, etc. However, most studies to date have ignored this aspect of CO2 capture. The major problem caused by water vapour is that water is a much stronger adsorbate than CO2 on most of the polar adsorbents thus drastically reducing the CO2 adsorption capacity. Although the water problem may be tackled by adding a pretreatment drier before the CO2VSA unit, this will result in a large increase of capital and operational cost. Therefore, there is a strong economic motivation to integrate the drying and CO2 recovery in a single VSA process for commercialization of CO2VSA technology.The main purpose of this project is to study the influence of water vapour on the adsorption of CO2 both in the light of fundamentals of adsorption and in the application of post-combustion carbon capture by vacuum swing adsorption experimentally and theoretically. Adsorption equilibria of a CO2/H2O binary mixture were measured on activated alumina F-200 at several temperatures and over a wide range of concentrations from 4% to around 90% relative humidity. In comparison with the single component data, the loading of CO2 was not reduced in the presence of H2O whereas at low relative humidity the adsorption of H2O was depressed. The binary system was described by a competitive/cooperative adsorption model where the readily adsorbed water layers acted as secondary sites for further CO2 adsorption via hydrogen bonding or hydration reactions. The combination of kinetic models namely a Langmuir isotherm for characterizing pure CO2 adsorption and a BET isotherm for H2O was extended to derive a binary adsorption equilibrium model for the CO2/H2O mixture. Models based on the ideal adsorbed solution theory of Myers and Prausnitz failed to characterize the data over the whole composition range and a large deviation of binary CO2/H2O equilibrium from ideal solution behavior was observed. The extended Langmuir-BET (LBET) isotherm, analogous to the extended Langmuir equation, drastically underestimated the CO2 loading. By incorporating the interactions between CO2 and H2O molecules on the adsorbent surface and taking into account the effect of nonideality, the realistic interactive LBET (R-LBET) model was found to be in very good agreement with the experimental data. In contrast, CO2 adsorption on zeolite 13X was entirely depressed at higher water humidity. Direct modification of 13X by silanes increased the hydrophobicity of the adsorbent but also reduced CO2 uptake.A laboratory-scale VSA apparatus was constructed and used to experimentally examine the capture of CO2 from a 10-12% synthetic flue gas stream over a range of water relative humidity. Breakthrough experiments with a binary CO2/H2O mixture in a near-adiabatic double layered 3A/13X column showed a peculiar dual roll-up phenomenon. Water adsorption generated a pure thermal wave which traveled ahead of the water concentration front and swept off the readily adsorbed CO2 leading to a thermal induced roll-up; the slow propagation of the water concentration wave displaced the CO2 by competitive adsorption resulting in n equilibrium induced roll-up. Cyclic VSA experiments with single layered 13X column and multilayered Al2O3/13X column configurations were conducted. The migration of the water and its subsequent impact on capture performance was evaluated. The formation of a water zone creates a "cold spot" which has implications for the system performance. Although the concentration of water leaving the bed under vacuum was high, the low vacuum pressure prevented condensation of this stream. The vacuum pump acted as a condenser and separator to remove bulk water. An important consequence of the presence of a water zone was to elevate the vacuum level thereby reducing CO2 working capacity. On the other hand, the internal purge of CO2 was found to be of critical importance to lower the water partial pressure during evacuation. The penetration of water in the column could be managed by keeping an appropriate volumetric purge-to-feed ratio or a higher vacuum level. This effect was predicted by our axial adiabatic working capacity model. At relatively high water content (> 4% v/v) in the feed, the use of a water prelayer was essential to prevent failure of the system. The overall performance of the VSA with wet feed decreased slightly compared with the performance for dry feed. Reasonable results have been achieved for a triple layered single column VSA in the case with the highest feed humidity of 8.5% v/v, with a product CO2 recovery of 58.2%, purity 52.4% and productivity 0.128 kg CO2/h/L adsorbent. Further scale-up of this process by using multi-columns and a more sophisticated cycle design is expected to further improve the performance. Thus although there is a detrimental effect of water on CO2 capture, long term recovery of CO2 is still possible in a single VSA process.
Author: D. Kunii
Publisher: Elsevier
ISBN: 008050664X
Category : Science
Languages : en
Pages : 520
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Book Description
Fluidization Engineering, Second Edition, expands on its original scope to encompass these new areas and introduces reactor models specifically for these contacting regimes. Completely revised and updated, it is essentially a new book. Its aim is to distill from the thousands of studies those particular developments that are pertinent for the engineer concerned with predictive methods, for the designer, and for the user and potential user of fluidized beds. - Covers the recent advances in the field of fluidization. - Presents the studies of developments necessary to the engineers, designers, and users of fluidized beds.
Author: Phillip C. Wankat
Publisher: Prentice Hall
ISBN: 0131382276
Category : Science
Languages : en
Pages : 992
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Book Description
The Definitive, Fully Updated Guide to Separation Process Engineering-Now with a Thorough Introduction to Mass Transfer Analysis Separation Process Engineering, Third Edition, is the most comprehensive, accessible guide available on modern separation processes and the fundamentals of mass transfer. Phillip C. Wankat teaches each key concept through detailed, realistic examples using real data-including up-to-date simulation practice and new spreadsheet-based exercises. Wankat thoroughly covers each of today's leading approaches, including flash, column, and batch distillation; exact calculations and shortcut methods for multicomponent distillation; staged and packed column design; absorption; stripping; and more. In this edition, he also presents the latest design methods for liquid-liquid extraction. This edition contains the most detailed coverage available of membrane separations and of sorption separations (adsorption, chromatography, and ion exchange). Updated with new techniques and references throughout, Separation Process Engineering, Third Edition, also contains more than 300 new homework problems, each tested in the author's Purdue University classes. Coverage includes Modular, up-to-date process simulation examples and homework problems, based on Aspen Plus and easily adaptable to any simulator Extensive new coverage of mass transfer and diffusion, including both Fickian and Maxwell-Stefan approaches Detailed discussions of liquid-liquid extraction, including McCabe-Thiele, triangle and computer simulation analyses; mixer-settler design; Karr columns; and related mass transfer analyses Thorough introductions to adsorption, chromatography, and ion exchange-designed to prepare students for advanced work in these areas Complete coverage of membrane separations, including gas permeation, reverse osmosis, ultrafiltration, pervaporation, and key applications A full chapter on economics and energy conservation in distillation Excel spreadsheets offering additional practice with problems in distillation, diffusion, mass transfer, and membrane separation
Author: Sahil Bangar
Publisher:
ISBN:
Category : Adsorption
Languages : en
Pages : 96
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Book Description
Capture of carbon dioxide from flue gas using amine functionalized silica based adsorbents has shown great potential recently. Despite their stable performance, the full potential of these adsorbents has not been researched in greater depth. In this thesis, experimental study and simulation of a temperature swing adsorption process for capture of CO2 and regeneration of the adsorbent using steam were carried out. Special emphasis was given on maximizing the purity of CO2 captured using this process, so as to lower the cost of further compression required for sequestration. For simulation of the cyclic temperature swing adsorption process, experimental measurements were carried out to study the adsorbent, suitable process modeling software was chosen and cycle configurations to maximize the performance of adsorbent were developed. Experimental isotherm data was collected for the amine impregnated adsorbent and an isotherm model was fitted. Subsequently, the isotherm parameters from the fitted model were used as input data for modeling of cyclic TSA processes. A reliable adsorption process simulator was then chosen based on its ability to accurately predict the column dynamics for an adsorption process. Model equations for the one-dimensional rigorous model comprising of mass, momentum and heat balances used for the simulation of the adsorption process are detailed. The effective model predictions of the simulator were validated using an adsorption process described in the literature, since the results were discerned to be in the acceptable range, further simulations using the software were carried out. A basic 3-step TSA cycle was developed to capture CO2 using amine impregnated silica adsorbent. Since the purity of the CO2 recovered using this configuration was not very high, another 4-step cycle with steam purge was implemented. The introduction of the steam purge step improved the purity considerably while lowering the recovery marginally. Parametric studies for both the cycles were also performed to determine the best operating conditions for the process.
