Download or read book Automation of Gas Absorption Column Using Camile TG and Determination of Overall Volumetric Mass Transfer Coefficients for Packing Materials Using Ethanol air water Absorption System written by Bhavani Puli and published by . This book was released on 2004 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Gas Absorption in a Fluidized bed Column written by Suntara Uppaputhangkul and published by . This book was released on 1980 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fluidized-bed column is an interesting technique in gas absorption process. It can be operated at high gas and liquid velocities with low pressure drop. In this work, the fluidized-bed composed of light weight spheres of uniform size, special types of gas distributor and liquid distributor were used to perform uniform fluidization at both high and low velocities of liquid and gas. The first part of the experiment concerned with the study of hydrodynamic characteristics of column in which air and water flowed counter-currently. Hydraulic resistance of bed, minimum fluidization velocity, gas hold-up and liquid hold-up were determined. The variable parameters studied were liquid velocity, gas velocity, and bed height. Correlation of various variables in fluidized-bed column was compared with those in the literature. In the second part, mass transfer coefficients of ammonia were studied. Liquid velocity, gas velocity, bed height, and concentration of ammonia gas were used as variable parameters. The results were summarized and also compared with fixed bed absorbers. The values of mass transfer coefficient expressed in term of Sherwood number can be represented as follows: Sh = 7.17 x 109. Fr[superscript 0.495]. ReL[superscript 0.442]. (Dc/Hs)[superscript 0.621].
Download or read book Mass Transfer Coefficients and Effective Area of Packing written by Chao Wang and published by . This book was released on 2015 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt: The effective mass transfer area (a [subscript e]), liquid film mass transfer coefficient (k [subscript L]), and gas film mass transfer coefficient (k [subscript G]) of eleven structured packings and three random packings were measured consistently in a 0.428 m packed column. Absorption of CO2 with 0.1 gmol/L NaOH with 3.05 m packing was used to measure a [subscript e], while air stripping of toluene from water with 1.83 m packing was used to measure k [subscript L], and absorption of SO2 with 0.1 gmol/L NaOH with 0.51 m packing was used to measure k [subscript G]. The experiments were conducted with liquid load changing from 2.5 to 75 m3/(m2*h) and gas flow rate from 0.6 to 2.3 m/s. Packings with surface area from 125 to 500 m2/m3 and corrugation angle from 45 to 70 degree were tested to explore the effect of packing geometries on mass transfer. The effective area increases with packing surface area and liquid flow rate, and is independent of gas velocity. The packing corrugation angle has an insignificant effect on mass transfer area. The ratio of effective area to surface area decreases as surface area increases due to the limit of packing wettability. A correlation has been developed to predict the mass transfer area with an average deviation of 11%. [Mathematical equation]. The liquid film mass transfer coefficient is only a function of liquid velocity with a power of 0.74, while the gas film mass transfer coefficient is only a function of gas velocity with a power of 0.58. Both k [subscript L] and k [subscript G] increase with packing surface area, and decrease with corrugation angle. A new concept, Mixing Point Density, was introduced to account for effect of the packing geometry on k[subscript L] and k [subscript G]. Mixing Point Density represents the frequency at which liquid film is refreshed and gas is mixed. The mixing point density can be calculated by either packing characteristic length or by surface area and corrugation angle: [mathematical equation]. The dimensionless k [subscript L] and k [subscript G] models can then be developed based on the effects of liquid/gas velocity, mixing point density, packing surface area: [mathematical equation] [mathematical equation]. Mi is the dimensionless form of Mixing Point Density (M), which is M divided by a [subscript P]3. Because Mi is only a function of corrugation angle ([Theta]), it is a convenient transformation to represent the effect of [Theta] on mass transfer parameters. An economic analysis of the absorber was conducted for a 250 MW coal-fired power plant. The optimum operating condition is between 50 to 80 % of flooding, and the optimum design is to use packing with 200 to 250 m2/m3 surface area and high corrugation angle (60 to 70 degree). The minimum total cost ranges from $4.04 to $5.83 per tonne CO2 removed with 8 m PZ.
Download or read book Effect of Axial Dispersion on Interphase Mass Transfer in Packed Absorption Columns written by Virendra Kumar Mathur and published by . This book was released on 1970 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt: "A steady state approach was followed in this investigation to determine the effects of liquid and gas flow rates, packing size and packing height on the interphase mass transfer coefficient and gas phase axial mixing Peclet numbers. Experiments were performed on the absorption of carbon dioxide from a mixture of carbon dioxide and nitrogen in a packed column. Absorption was performed using 1/4, 3/8 and l/2 inch Raschig rings, with a packing height of 3 feet and also using 3/8 inch Raschig rings with a packing height of 5 feet. The liquid and gas flow ranges used were 2865 to 5680 lb./hr.sq.ft. and 5.0 to 7.4 lb./hr.sq.ft., respectively. Three mathematical models, viz. (i) plug flow in both the gas and liquid phases, (ii) axial mixing in gas phase and plug flow in liquid phase, and (iii) axial mixing in both gas and liquid phases, were used. It is found that axial mixing in the gas phase increases with increases in liquid flow rate, packing size and packing height. The behavior of apparent and true mass transfer coefficients indicates a decrease in axial mixing with increases in gas flow rates. However, axial mixing is found to be small under the experimental conditions used in this investigation. The gas phase Peclet numbers obtained in this investigation are about fifty times greater than reported by workers using a transient technique under the same conditions. Correlations for the apparent and true over-all liquid phase mass transfer coefficients are also presented"--Abstract, leaf ii.
Download or read book Liquid Phase Mass Transfer Coefficients in Cocurrent Flow Gas Absorption in a Packed Column at High Liquid Flow Rates written by Raymond Celian Ufford and published by . This book was released on 1973 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Adsorption and Diffusion written by Hellmut G. Karge and published by Springer Science & Business Media. This book was released on 2008-06-17 with total page 411 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Molecular Sieves - Science and Technology" covers, in a comprehensive manner, the science and technology of zeolites and all related microporous and mesoporous materials. The contributions are grouped together topically in such a way that each volume deals with a specific sub-field. Volume 7 treats fundamentals and analyses of adsorption and diffusion in zeolites including single-file diffusion. Various methods of measuring adsorption and diffusion are described and discussed.
Download or read book ACS Style Guide written by Anne M. Coghill and published by American Chemical Society. This book was released on 2006 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the time since the second edition of The ACS Style Guide was published, the rapid growth of electronic communication has dramatically changed the scientific, technical, and medical (STM) publication world. This dynamic mode of dissemination is enabling scientists, engineers, and medicalpractitioners all over the world to obtain and transmit information quickly and easily. An essential constant in this changing environment is the requirement that information remain accurate, clear, unambiguous, and ethically sound.This extensive revision of The ACS Style Guide thoroughly examines electronic tools now available to assist STM writers in preparing manuscripts and communicating with publishers. Valuable updates include discussions of markup languages, citation of electronic sources, online submission ofmanuscripts, and preparation of figures, tables, and structures. In keeping current with the changing environment, this edition also contains references to many resources on the internet.With this wealth of new information, The ACS Style Guide's Third Edition continues its long tradition of providing invaluable insight on ethics in scientific communication, the editorial process, copyright, conventions in chemistry, grammar, punctuation, spelling, and writing style for any STMauthor, reviewer, or editor. The Third Edition is the definitive source for all information needed to write, review, submit, and edit scholarly and scientific manuscripts.
Download or read book Chemical Reaction Engineering written by Martin Schmal and published by CRC Press. This book was released on 2014-04-04 with total page 698 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chemical Reaction Engineering: Essentials, Exercises and Examples presents the essentials of kinetics, reactor design and chemical reaction engineering for undergraduate students. Concise and didactic in its approach, it features over 70 resolved examples and many exercises.The work is organized in two parts: in the first part kinetics is presented
Download or read book Characterization of Minerals Metals and Materials 2020 written by Jian Li and published by Springer Nature. This book was released on 2020-01-23 with total page 723 pages. Available in PDF, EPUB and Kindle. Book excerpt: This collection gives broad and up-to-date results in the research and development of materials characterization and processing. Topics covered include advanced characterization methods, minerals, mechanical properties, coatings, polymers and composites, corrosion, welding, magnetic materials, and electronic materials. The book explores scientific processes to characterize materials using modern technologies, and focuses on the interrelationships and interdependence among processing, structure, properties, and performance of materials.
Download or read book Chemical Evolution written by Bernd Markert and published by Springer. This book was released on 2015-02-19 with total page 295 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is written for researchers and students interested in the function and role of chemical elements in biological or environmental systems. Experts have long known that the Periodic System of Elements (PSE) provides only an inadequate chemical description of elements of biological, environmental or medicinal importance. This book explores the notion of a Biological System of the Elements (BSE) established on accurate and precise multi-element data, including evolutionary aspects, representative sampling procedures, inter-element relationships, the physiological function of elements and uptake mechanisms. The book further explores the concept Stoichiometric Network Analysis (SNA) to analyze the biological roles of chemical species. Also discussed is the idea of ecotoxicological identity cards which give a first-hand description of properties relevant for biological and toxicological features of a certain chemical element and its geo biochemically plausible speciation form. The focus of this book goes beyond both classical bioinorganic chemistry and toxicology.
Download or read book The Chaos Scenario written by Bob Garfield and published by . This book was released on 2009 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt: What happens when the old mass media/mass marketing model collapses and the Brave New World is unprepared to replace it? In this fascinating, terrifying, instructive and often hilarious book, Bob Garfield of NPR and Ad Age, chronicles the disintegration of traditional media and marketing but also travels five continents to discover how business can survive--and thrive--in a digitally connected, Post-Media Age. He calls this the art and science of Listenomics. You should listen, too.
Download or read book Characterization of Minerals Metals and Materials 2019 written by Bowen Li and published by Springer. This book was released on 2019-02-13 with total page 782 pages. Available in PDF, EPUB and Kindle. Book excerpt: This collection gives broad and up-to-date results in the research and development of materials characterization and processing. Topics covered include characterization methods, ferrous materials, non-ferrous materials, minerals, ceramics, polymer and composites, powders, extraction, microstructure, mechanical behavior, processing, corrosion, welding, solidification, magnetic, electronic, environmental, nano-materials, and advanced materials The book explores scientific processes to characterize materials using modern technologies, and focuses on the interrelationships and interdependence among processing, structure, properties, and performance of materials.
Download or read book Organic Thermoelectric Materials written by Zhiqun Lin and published by Royal Society of Chemistry. This book was released on 2019-10-18 with total page 330 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book summarises the significant progress made in organic thermoelectric materials, focusing on effective routes to minimize thermal conductivity and maximize power factor.
Download or read book Non aqueous Solvent Systems written by Thomas Cudworth Waddington and published by . This book was released on 1965 with total page 594 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Agricultural Biomass Based Potential Materials written by Khalid Rehman Hakeem and published by Springer. This book was released on 2015-04-01 with total page 505 pages. Available in PDF, EPUB and Kindle. Book excerpt: Agricultural biomass is abundant worldwide and it can be considered as alternative source of renewable and sustainable materials which can be used as potential materials for different applications. Despite this enormous production of agricultural biomass, only a small fraction of the total biomass is utilized for different applications. Industry must be prepared to take advantage of the situation and utilize the available biomass in the best possible manner. Agricultural biomass such as natural fibres has been successfully investigated as a great potential to be used as a renewable and sustainable materials for the production of composite materials. Natural fibres offer excellent specific properties and have potential as outstanding reinforcing fillers in the matrix and can be used as an alternative material for biocomposites, hybrid composites, pulp, and paper industries. Natural fibre based polymer composites made of jute, oil palm, flex, hemp, kenaf have a low market cost, attractive with respect to global sustainability and find increasing commercial use in different applications. Agricultural biomass based composites find applications in a number of fields viz., automotive industry and construction industry. Future research on agricultural biomass-natural fibre based composites should not only be limited to its automotive applications but can be explored for its application in aircraft components, construction industry, rural housing and biomedical applications. In this book we will cover the chemical, physical, thermal, electrical, and biodegradability properties of agricultural biomass based composite materials and its different potential applications. The main goal of this volume is to familiarize researchers, scientists and engineers with the unique research opportunities and potentials of agricultural biomass based materials. Up-to-date information on alternative biomass utilization Academic and industry leaders discuss unique properties of biomass based composite materials Direct application of agricultural biomass materials as sustainable and renewable alternatives
Download or read book Inorganic Syntheses Volume 33 written by and published by John Wiley & Sons. This book was released on 2004-08-04 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Inorganic Syntheses series provides inorganic chemists with detailed and foolproof procedures for the preparation of important and timely compounds. Volume 33 includes provocative contributions on syntheses of selected supramolecules, useful reagents/ligands, solid state materials/clusters, and other compounds of general interest.
Download or read book Biopolymers from Renewable Resources written by David L. Kaplan and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt: Biopolymers from Renewable Resources is a compilation of information on the diverse and useful polymers derived from agricultural, animal, and microbial sources. The volume provides insight into the diversity of polymers obtained directly from, or derived from, renewable resources. The beneficial aspects of utilizing polymers from renewable resources, when considering synthesis, pro cessing, disposal, biodegradability, and overall material life-cycle issues, suggests that this will continue to be an important and growing area of interest. The individual chapters provide information on synthesis, processing and properties for a variety of polyamides, polysaccharides, polyesters and polyphenols. The reader will have a single volume that provides a resource from which to gain initial insights into this diverse field and from which key references and contacts can be drawn. Aspects of biology, biotechnology, polymer synthesis, polymer processing and engineering, mechanical properties and biophysics are addressed to varying degrees for the specific biopolymers. The volume can be used as a reference book or as a teaching text. At the more practical level, the range of important materials derived from renewable resources is both extensive and impressive. Gels, additives, fibers, coatings and films are generated from a variety of the biopolymers reviewed in this volume. These polymers are used in commodity materials in our everyday lives, as well as in specialty products.
