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Books > Professional & Technical > Industrial chemistry & manufacturing technologies > Industrial chemistry > General
Integral processes with dead time are frequently encountered in the process industry; typical examples include supply chains, level control and batch distillation columns. Special attention must be paid to their control because they lack asymptotic stability (they are not self-regulating) and because of their delays. As a result, many techniques have been devised to cope with these hurdles both in the context of single-degree-of-freedom (proportional-integral-differential (PID)) and two-degree-of-freedom control schemes. Control of Integral Processes with Dead Time provides a unified and coherent review of the various approaches devised for the control of integral processes, addressing the problem from different standpoints. In particular, the book treats the following topics: how to tune a PID controller and assess its performance; how to design a two-degree-of-freedom control scheme in order to deal with both the set-point following and load disturbance rejection tasks; how to modify the basic Smith predictor control scheme in order to cope with the presence of an integrator in the process; and how to address the presence of large process dead times. The methods are presented sequentially, highlighting the evolution of their rationale and implementation and thus clearly characterising them from both academic and industrial perspectives. Control of Integral Processes with Dead Time will serve academic researchers in systems with dead time both as a reference and stimulus for new ideas for further work and will help industry-based control and process engineers to solve their control problems using the most suitable technique and achieving the best cost: benefit ratio."
This book is about Nano and micro engineered membrane technology,
an emerging new technological area in membrane technology.
Potential applications cover a broad spectrum of science, such as
micro and nano filtration, gas separation, optics and
nanophotonics, catalysis, microbiology, controlled drug delivery,
nanopatterning, micro contact printing, atomisation, cross flow
emulsification, etc. A brief overview of filtration membranes and
pore structures is presented in chapter 1 and in the subsequent
chapter 2 an overview is presented of conventional micro
perforation methods, like laser drilling, electroforming, precision
etching etc. With micro engineering techniques (chapter 3),
originating from the semiconductor industry, it is relatively easy
to downscale and form submicron pores (down to 100 nm) using
photolithographic methods, with e.g. contact masks and wafer
steppers. In chapter 4 some elementary fluid mechanics related to
fluid flow in conducts and single and multiple orifices is
presented covering analytical methods as well as computational
fluid dynamics. Much effort has been put in strength and maximum
pressure load analysis (chapter 5) of perforated and unperforated
membranes. New analytical expressions were obtained that were
verified by a number of computer simulations and many experiments.
A separate chapter (chapter 6) has been devoted to the pioneering
work of manufacturing polymeric perforated membranes because of its
potential future economical impact. Large scale microfiltration
applications on e.g. skim milk and lager beer are presented in
chapter 7, whereas in chapter 8 a micro scale Lab-on-a-Chip
microfiltration/fractionation demonstrator is discussed.
ILC has been a major control design methodology for twenty years; numerous algorithms have been developed to solve real-time control problems, from MEMS to batch reactors, characterised by repetitive control operations. Real-time Iterative Learning Control demonstrates how the latest advances in iterative learning control (ILC) can be applied to a number of plants widely encountered in practice. The authors provide a hitherto lacking systematic introduction to real-time ILC design and source of illustrative case studies for ILC problem solving; the fundamental concepts, schematics, configurations and generic guidelines for ILC design and implementation are enhanced by a well-selected group of representative, simple and easy-to-learn example applications. Key issues in ILC design and implementation in the linear and nonlinear plants that pervade mechatronics and batch processes are addressed. In particular, the book discusses: ILC design in the continuous- and discrete-time domains; design in the frequency and time domains; design with problem-specific performance objectives including robustness and optimality; design in a modular approach by integration with other control techniques; and design by means of classical tools based on Bode plots and state space. Real-time Iterative Learning Control will interest control engineers looking for examples of how this important control technique can be applied to a variety of real-life problems. With its systematic formulation and analysis of different system properties and performance and its exposition of open problems, academics and graduate students working in control will find it a useful reference to the current status of ILC.
This book looks at new ways of tackling the problem of separating reaction products from homogeneous catalytic solutions. The new processes involve low leaching supported catalysts, soluble supports such as polymers and dendrimers and unusual solvents such as water, fluorinated organics, ionic liquids and supercritical fluids. The advantages of the different possibilities are discussed alongside suggestions for further research that will be required for commercialisation. Unlike other books, in addition to the chemistry involved, the book looks at the process design that would be required to bring the new approaches to fruition. Comparisons are given with existing processes that have already been successfully applied and examples are given where these approaches are not suitable. The book includes: - New processes for the separation of products from solutions containing homogeneous catalysts - Catalysts on insoluble or soluble supports a" fixed bed catalysts - continuous flow or ultrafiltration - Biphasic systems: water - organic, fluorous - organic, ionic liquid a" organic, supercritical fluids (monophasic or biphasic with water, organic or ionic liquid) - Comparisons with current processes involving atmospheric or low temperature distillation - Consideration of Chemistry and Process Design - Advantages and disadvantages of each process exposed - Consideration of what else is need for commercialisation
A thermodynamically consistent description of the transport across interfaces in mixtures has for a long time been an open issue. This research clarifies that the interface between a liquid and a vapor in a mixture is in local equilibrium during evaporation and condensation. It implies that the thermodynamics developed for interfaces by Gibbs can be applied also away from equilibrium, which is typically the case in reality. A description of phase transitions is of great importance for the understanding of both natural and industrial processes. For example, it is relevant for the understanding of the increase of CO2 concentration in the atmosphere, or improvements of efficiency in distillation columns. This excellent work of luminescent scientific novelty has brought this area a significant step forward. The systematic documentation of the approach will facilitate further applications of the theoretical framework to important problems.
This thesis addresses the development of a new force spectroscopy tool, correlation force spectroscopy (CFS) for the measurement of the properties of very small volumes of material (molecular to m3) at kHz-MHz frequency range. CFS measures the simultaneous thermal fluctuations of two closely-spaced atomic force microscopy (AFM) cantilevers. CFS then calculates the cross-correlation in the thermal fluctuations that gives the mechanical properties of the matter that spans the gap of the two cantilevers. The book also discusses development of CFS, its advantages over AFM, and its application in single molecule force spectroscopy and micro-rheology.
This comprehensive handbook provides a complete and updated
overview of filter media. From classification to performance date
to practical selection tables.
Mercury (Hg) is one of the most toxic heavy metals, harmful to both the environment and human health. Hg is released into the atmosphere from natural and anthropogenic sources and its emission control has caused much concern. This book introduces readers to Hg pollution from natural and anthropogenic sources and systematically describes coal-fired flue gas mercury emission control in industry, especially from coal-fired power stations. Mercury emission control theory and experimental research are demonstrated, including how elemental mercury is oxidized into oxidized mercury and the effect of flue gas contents on the mercury speciation transformation process. Mercury emission control methods, such as existing APCDs (air pollution control devices) at power stations, sorbent injection, additives in coal combustion and photo-catalytic methods are introduced in detail. Lab-scale, pilot-scale and full-scale experimental studies of sorbent injection conducted by the authors are presented systematically, helping researchers and engineers to understand how this approach reduces the mercury emissions in flue gas and to apply the methods in mercury emission control at coal-fired power stations. Readers will arrive at a comprehensive understanding of various mercury emission control methods that are suitable for industrial applications. The book is intended for scientists, researchers, engineers and graduate students in the fields of energy science and technology, environmental science and technology and chemical engineering.
Preface - This single-volume compendium fulfills the demand for a compact version of the widely acclaimed Encyclopedia of Surfactants and contains over 12,000 entries. The surfactant products included have been compiled with. the cooperation of the major national and international surfactant manufacturers. The first section of this reference is a Trademark Dictionary that contains short entries for all tradename surfactants that appear in Volumes I-IV of the Encyclopedia plus all the new surfactant products that have become available since the publication of this set. Each tradename entry is followed by a number in brackets which refers to the manufacturer that is listed in Part III of this encyclopedia. What makes this reference unique and especially useful for anyone doing chemical research is the addition of the Chemical Component-to-Tradename Cross Reference section. This provides the user with the capability of finding tradename surfactant products that contain specific chemical compounds. For example, by locating alphabetically the chemical ammonium lauryl sulfate, the user is able to retrieve a list of all the tradename products that contain that chemical. The user can then refer back to the frrst section for detailed descriptions of the specific tradename products listed here. This section also includes the chemical compound synonyms for the surfactant components which are cross referenced in most cases to the alternate chemical names that contain the tradename product listings. Primary chemical component references are made to the CTFA (Cosmetic, Toiletry, and Fragrance Association) adopted names where possible. For many chemical entries the Chemical Abstract Service Registry Numbers (CAS) are given. This number ensures the unique identification of a chemical regardless of its multiplicity of synonyms. RD (Recognized Disclosure) reference numbers are included in some cases either in addition to the CAS number or because no CAS number has been assigned as yet. The third section presents the names and addresses of the manufacturers of all of the products included in this compendium with their associated tradenames.
Man's use of enzymes dates back to the earliest times of civilization. Important human activities such as the production of certain types of foods and beverages, and the tanning of hides and skins to produce leather for garments, serendipitously took advantage of enzymes. Important advances in our understanding of the nature of enzymes and their action were made in the late 19th and early 20th centuries, seeding the explosive expansion from the 1950s and 60s onward to the present billion dollar enzyme industry. Recent developments in the fields of genetic engineering and protein chemistry are bringing ever more powerful means of analysis to bear on the study of enzyme structure and function that will undoubtedly lead to the rational modification of enzymes to match specific requirements and also the design of new enzymes with novel properties.
Precursors of the modern chemical industry began to emerge in Northern Europe in the middle of the eighteenth century. The Industrial Revolution boosted activities such as soap-making, glassmaking and textiles production, which required increasing quantities of chemical products. The Lead Chamber process for the manufacture of sulphuric acid, required for the production of dye, was developed in the 1740s by John Roebuck then based in Birmingham. Production of this key commodity rose steadily. By the 1820s, British annual production had reached 10 000 tons of 100% acid. By 1900, Britain was producing one quarter of the world's output with an annual production approaching one million tons. Demand for alkalis for glassmaking and soap-making, for textile dyes and for bleach was also growing rapidly in the second half of the eighteenth century, and it became clear that existing sources of these materials would not be sufficient. In response to a prize established by the Academie des Sciences, Nicholas Leblanc had devised by 1791 a method for converting common salt into soda ash, which was to become the central operation of the world alkali industry for about one hundred years.
This book presents the applications of ion-exchange materials in the area of environmental analysis and treatment. It includes chapters on applications of organic, inorganic and composite ion exchange materials and hexacyanoferrates in various fields such as chemical and biochemical separations, water purification, removal of harmful impurities, dyes and cationic and anionic complexes. This title is a highly valuable source of knowledge on ion-exchange materials and their applications suitable for postgraduate students and researchers but also to industrial R&D specialists in chemistry, chemical, and biochemical technology. Additionally, this book will provide an in-depth knowledge of ion-exchange column and operations suitable for engineers and industrialists.
This book focuses on how the energetic efficiency of biofuel production systems can be modeled. It provides engineers and economists with an essential grasp of biofuel production systems performance, as it includes results of mathematical modeling and computer simulations concerning the performance of real-world biofuel production systems. The book also indicates the limitations on biofuel production's ability to ensure sustainability and the energetic self-sufficiency of agriculture, helping politicians and other decision-makers to choose between various legal and economic options.
Fault Diagnosis of Dynamic Systems provides readers with a glimpse into the fundamental issues and techniques of fault diagnosis used by Automatic Control (FDI) and Artificial Intelligence (DX) research communities. The book reviews the standard techniques and approaches widely used in both communities. It also contains benchmark examples and case studies that demonstrate how the same problem can be solved using the presented approaches. The book also introduces advanced fault diagnosis approaches that are currently still being researched, including methods for non-linear, hybrid, discrete-event and software/business systems, as well as, an introduction to prognosis. Fault Diagnosis of Dynamic Systems is valuable source of information for researchers and engineers starting to work on fault diagnosis and willing to have a reference guide on the main concepts and standard approaches on fault diagnosis. Readers with experience on one of the two main communities will also find it useful to learn the fundamental concepts of the other community and the synergies between them. The book is also open to researchers or academics who are already familiar with the standard approaches, since they will find a collection of advanced approaches with more specific and advanced topics or with application to different domains. Finally, engineers and researchers looking for transferable fault diagnosis methods will also find useful insights in the book.
This book had its genesis in a symposium on gas hydrates presented at the 2003 Spring National Meeting of the American Institute of Chemical Engineers. The symposium consisted of twenty papers presented in four sessions over two days. Additional guest authors were invited to provide continuity and cover topics not addressed during the symposium. Gas hydrates are a unique class of chemical compounds where molecules of one compound (the guest material) are enclosed, without bonding chemically, within an open solid lattice composed of another compound (the host material). These types of configurations are known as clathrates. The guest molecules, u- ally gases, are of an appropriate size such that they fit within the cage formed by the host material. Commonexamples of gas hydrates are carbon dioxide/water and methane/water clathrates. At standard pressure and temperature, methane hydrate contains by volume 180 times as much methane as hydrate. The United States Geological Survey (USGS) has estimated that there is more organic carbon c- tained as methane hydrate than all other forms of fossil fuels combined. In fact, methane hydrates could provide a clean source of energy for several centuries. Clathrate compounds were first discovered in the early 1800s when Humphrey Davy and Michael Faraday were experimenting with chlorine-water mixtures.
Biomass conversion research is a combination of basic science, applied science, and engineering testing and analysis. Conversion science includes the initial treatment (called pre-treatment) of the feedstock to render it more amenable to enzyme action, enzymatic saccharification, and finally product formation by microbiological or chemical processes. In Biomass Conversion: Methods and Protocols, expert researchers in the field detail methods which are now commonly used to study biomass conversion. These methods include Biomass Feedstocks and Cellulose, Plant Cell Wall Degrading Enzymes and Microorganisms, and Lignins and Hemicelluloses. Written in the highly successful Methods in Molecular Biology (TM) series format, the chapters include the kind of detailed description and implementation advice that is crucial for getting informed, reproducible results in the laboratory.
Fault-tolerant control aims at a gradual shutdown response in automated systems when faults occur. It satisfies the industrial demand for enhanced availability and safety, in contrast to traditional reactions to faults, which bring about sudden shutdowns and loss of availability. The book presents effective model-based analysis and design methods for fault diagnosis and fault-tolerant control. Architectural and structural models are used to analyse the propagation of the fault through the process, to test the fault detectability and to find the redundancies in the process that can be used to ensure fault tolerance. It also introduces design methods suitable for diagnostic systems and fault-tolerant controllers for continuous processes that are described by analytical models of discrete-event systems represented by automata. The book is suitable for engineering students, engineers in industry and researchers who wish to get an overview of the variety of approaches to process diagnosis and fault-tolerant control. The authors have extensive teaching experience with graduate and PhD students, as well as with industrial experts. Parts of this book have been used in courses for this audience. The authors give a comprehensive introduction to the main ideas of diagnosis and fault-tolerant control and present some of their most recent research achievements obtained together with their research groups in a close cooperation with European research projects. The third edition resulted from a major re-structuring and re-writing of the former edition, which has been used for a decade by numerous research groups. New material includes distributed diagnosis of continuous and discrete-event systems, methods for reconfigurability analysis, and extensions of the structural methods towards fault-tolerant control. The bibliographical notes at the end of all chapters have been up-dated. The chapters end with exercises to be used in lectures.
Though the game-theoretic approach has been vastly studied and utilized in relation to economics of industrial organizations, it has hardly been used to tackle safety management in multi-plant chemical industrial settings. Using Game Theory for Improving Safety within Chemical Industrial Parks presents an in-depth discussion of game-theoretic modeling which may be applied to improve cross-company prevention and -safety management in a chemical industrial park. By systematically analyzing game-theoretic models and approaches in relation to managing safety in chemical industrial parks, Using Game Theory for Improving Safety within Chemical Industrial Parks explores the ways game theory can predict the outcome of complex strategic investment decision making processes involving several adjacent chemical plants. A number of game-theoretic decision models are discussed to provide strategic tools for decision-making situations. Offering clear and straightforward explanations of methodologies, Using Game Theory for Improving Safety within Chemical Industrial Parks provides managers and management teams with approaches to asses situations and to improve strategic safety- and prevention arrangements.
This book includes details on the environmental implications of recycling, modeling of recycling, processing of recycled materials, recycling potential of materials, characterisation of recycled materials, reverse logistics, case studies of recycling various materials etc.
With the recent advent of nanotechnology, research and development in the area of nanostructured catalysts has gained unprecedented prominence. Novel materials with potentially exciting new applications in catalysis are being discovered at a much higher rate than ever before. Innovative tools to fabricate, manipulate, characterize, and evaluate such materials are being developed and expanded. To keep pace with this extremely rapid growth, it is necessary to take a breath from time to time, to critically assess the current knowledge and provide thoughts for future developments. This book represents one of these moments, as a number of prominent scientists in nanostructured catalysts join forces to provide insightful reviews of their areas of expertise; thus, offering an overall picture of the state-of-the art of the field. Nanostructured materials designate an increasing number of materials with designed shapes, surfaces, structures, pore systems, etc. In general, nanostructured catalysts have modified surfaces, including materials whose surfaces have been altered via such techniques as grafting and tethering of organic or organometallic species, or through various deposition procedures including electro, electroless, and vapor deposition, or simple adsorption. Materials with designed regular pore systems, such as zeolites, metallophosphates, periodic mesoporous materials, nanoporous organic, and organometallic materials are also members of the large family of nanostructured materials. These materials are of paramount importance, particularly in catalysis. One of the most distinctive characteristics of this book is the fact that it is all-inclusive, since most of the materialslisted above have been dealt with in a concise and informative manner. With fourteen up-to-date reports on the design, synthesis, and catalytic properties of nanostructured materials, this book sets the stage for things to come in this area. The development of novel catalysts, taking advantage of the many interesting attributes of periodic nanoporous materials, and the discovery of innovative materials, such as polymer- silica nanocomposites and confined nanoparticles, are some of the leading ideas for future work in the increasingly important field of nanostructured catalysts.
Sol-Gel Processing for Conventional and Alternative Energy is a comprehensive source of information on the use of sol-gel processing in materials in energy systems, conversion, storage, and generation. The volume editors include numerous applications, primarily in nuclear fuel processing, electrolytes for fuel cells, and dye-sensitized solar cells (DSSC). In addition to examining contemporary processing, properties, and industrial applications, "Sol-Gel Processing for Conventional and Alternative Energy" identifies materials challenges presented by conventional and alternative energy generation that require new materials and innovative processing. Each chapter is written by an internationally respected researcher. The book provides a state-of-the-art treatment of different aspects of materials for energy production, with a focus on processing, and covers related topics such as carbon sequestration, clean energy, and biofuels.
F. T. Wallenberger This book serves as an introduction to advanced inorganic fibers and aims to support fundamental research, assist applied scientists and designers in industry, and facilitate materials science instruction in universities and colleges. Its three main sections deal with fibers which are derived from the vapor phase such as single crystal silicon whiskers or carbon nanotubes, from the liquid phase such as advanced glass and single crystal oxide fibers, and from solid precursor fibers such as carbon and ceramic fibers. Contents FIBERS FROM THE VAPOR, LIQUID AND SOLID PHASE 1.1 The most important phase isthe liquid phase 1.2 Afiber by any name isstill afiber 1.3 Biographic sketches ofthe authors 1.4 Acknowledgments CHAPTER 1 FIBERS FROM THE VAPOR, LIQUID AND SOLID PHASE F. T. Wallenberger The book describes advanced inorganic fibers, focuses on principles and concepts, analyzes experimental and commercial processes, and relates process variables to structures, structures tofiber properties and fiber properties to end-use performance. In principle, there are discontinuous or inherently short, and continuous or potentially endless, fibers. Short fibers range from asbestos fibers, which were described as early as 300 BC to carbon nanotubes which were discovered in 1991 [1] and have been fully described in 1999 [2].
This book examines in detail key aspects of sustainability in the textile industry, especially environmental, social and economic sustainability in the textiles and clothing sector. It highlights the various faces and facets of sustainability and their implications for textiles and the clothing sector.
Tingyue Gu's second edition provides a comprehensive set of nonlinear multicomponent liquid chromatography (LC) models for various forms of LC, such as adsorption, size exclusion, ion-exchange, reversed-phase, affinity, isocratic/gradient elution and axial/radial flow LC. Much has advanced since the first edition of this book and the author's software, described here, is now used for teaching and research in 32 different countries. This book comes together with a complete software package with graphical user interface for personal computers, offered free for academic applications. Additionally, this book provides detailed methods for parameter estimation of mass transfer coefficients, bed voidage, particle porosity and isotherms. The author gives examples of how to use the software for predicitons and scale-up. In contrast to the first edition, authors do not need to deal with complicated math. Instead, they focus on how to obtain a few parameters for simulation and how to compare simulation results with experimental data. After reading the detailed descriptions in the book, a reader is able to use the simulation software to investigate chromatographic behavior without doing actual experiments. This book is aimed at readers who are interested in learning about LC behaviors and at those who want to scale up LC for preparative- and large-scale applications. Both academic personnel and industrial practitioners can benefit from the use of the book. This new edition includes: - New models and software for pellicular (cored) beads in liquid chromatography - Introduction of user-friendly software (with graphical user interface) - Detailed descriptions on how to use the software - Step-by-step instructions on parameter estimation for the models - New mass-transfer correlations for parameter estimation - Experimental methods for parameter estimation - Several actual examples using the model for product development and scale-up - Updated literature review |
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