Download or read book Entrained bed Coal Gasification Modelling written by Chin-Yung Wen and published by . This book was released on 1978 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Entrained bed Coal Gasification Modelling written by C. Y. Wen and published by . This book was released on 1978 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Coal and Biomass Gasification written by Santanu De and published by Springer. This book was released on 2017-12-13 with total page 524 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book addresses the science and technology of the gasification process and the production of electricity, synthetic fuels and other useful chemicals. Pursuing a holistic approach, it covers the fundamentals of gasification and its various applications. In addition to discussing recent advances and outlining future directions, it covers advanced topics such as underground coal gasification and chemical looping combustion, and describes the state-of-the-art experimental techniques, modeling and numerical simulations, environmentally friendly approaches, and technological challenges involved. Written in an easy-to-understand format with a comprehensive glossary and bibliography, the book offers an ideal reference guide to coal and biomass gasification for beginners, engineers and researchers involved in designing or operating gasification plants.
Download or read book Coal Gasifier written by Jogen Shah and published by . This book was released on 1982 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Computer modeling of coal gasification reactors written by Systems, Science, and Software (Firm) and published by . This book was released on 1976 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Computer modeling of coal gasification reactors written by Systems, Science, and Software (Firm) and published by . This book was released on 1977 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Computer Modeling of Coal Gasification Reactors written by T. R. Blake and published by . This book was released on 1977 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mixing and Gasification of Coal in Entrained Flow Systems written by Brigham Young University. Chemical Engineering Department and published by . This book was released on 1978 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modeling of Coal Gasification for Fuel Cell Utilization written by M. L. Finson and published by . This book was released on 1978 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report summarizes recent progress on a DOE-supported program to construct computer models for potential future combined coal gasification/fuel cell power generation systems. The approach is to develop physically well-founded descriptions for the performance of both molten carbonate fuel cells and coal gasifiers, and to utilize the models to prepare performance maps for each device, enabling selection of the optimum interfaces between fuel cells and gasifiers. In a previous phase of the study, we identified entrained flow gasification as the most appropriate type for providing fuel cell feed gas, on the basis of off-gas composition and the ability to handle a wide range of coal types. Accordingly, a substantial portion of the current effort is concerned with the development of a computer model for entrained flow gasifiers. Furthermore, several scaling laws have been developed for fuel cell performance. Mostly based on equilibrium (open-circuit) considerations to date, these address such issues as the requirements for avoiding carbon deposition, the potential effects of methane conversion, and the distribution of heat sources and sinks within the cell.
Download or read book Mathematical Modelling of Entrained Flow Coal Gasification written by Andrew Charles Beath and published by . This book was released on 1996 with total page 532 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Computational Modeling of Underground Coal Gasification written by Vivek V. Ranade and published by CRC Press. This book was released on 2019-07-15 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book deals with development of comprehensive computational models for simulating underground coal gasification (UCG). It starts with an introduction to the UCG process and process modelling inputs in the form of reaction kinetics, flow patterns, spalling rate, and transport coefficient that are elaborated with methods to generate the same are described with illustrations. All the known process models are reviewed, and relative merits and limitations of the modeling approaches are highlighted and compared. The book describes all the necessary steps required to determine the techno-economic feasibility of UCG process for a given coal reserve, through modeling and simulation.
Download or read book A Computational Study of Devolatilization and Kinetics in Entrained Flow Coal Gasification written by Aalia Rakhshi and published by . This book was released on 2018 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt: Computational fluid dynamics (CFD) modeling is an integral part of the design cycle of modern entrained flow gasifiers. Gasification modeling considers an interacting multi-phase media in a turbulent environment. Several gasification sub-models have been developed and validated over the last thirty five years related to turbulence, gaseous combustion, devolatilization and char reactions. The CFD model of gasification must be valid for a range of operating conditions, reactor designs and feedstock compositions. Although tremendous strides have been made in every aspect of gasification modeling, shortcomings do exist in many of the sub-models. Two problems of practical significance are studied in this dissertation. The first is related to devolatilization and the second deals with the accuracy of the gaseous and char combustion models. A focus and consideration of the two problems will improve the predictive capability of the gasification model. In the first, a new framework for volatile breakdown is developed for entrained flow gasification modeling. The framework is based on an optimized solution of an under-determined system of equations formulated using a two-step Moore-Penrose generalized matrix approach. The approach permits the determination of the volatile composition using just the Proximate-Ultimate analysis data of coal. The method can be utilized for all coal types irrespective of origin.The accuracy and consistency of the framework is demonstrated by direct comparison with available devolatilization breakdown data. The overall performance of the framework is also appraised by incorporating it in a CFD simulation of an actual entrained flow gasifier, the 2550 TPD ConocoPhillips EGas technology based two stage oxygen blown gasifier. The reactor exit syngas composition from the simulation is favorably compared with available experimental data. In the second problem, a kinetics assessment of the quasi-global homogeneous and heterogeneous reaction mechanisms is carried out for entrained flow coal gasification modeling. Accurate closure of the chemical source term in gasification modeling necessitates a detailed study of turbulence-chemistry interaction. Towards this end, time-scale analysis of the homogeneous reactions is discussed using eigenvalue analysis of the reaction rate Jacobian matrix. A singular value decomposition of the stoichiometric reaction matrix is performed to assess the behavior of the homogeneous reactions in a reduced species vector space. The significant factors affecting the heterogeneous char reactions is assessed and the relative importance of bulk diffusion and inherent char kinetics is analyzed in a gasifier. The overall study is carried out using numerical and experimental results of an actual pilot scale gasifier, the 200 TPD (tons per day) Mitsubishi Heavy Industries (MHI) pilot scale air blown gasifier.
Download or read book Gasification Processes written by Petr A. Nikrityuk and published by John Wiley & Sons. This book was released on 2014-06-18 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bridging the gap between the well-known technological description of gasification and the underlying theoretical understanding, this book covers the latest numerical and semi-empirical models describing interphase phenomena in high-temperature conversion processes. Consequently, it focuses on the description of gas-particle reaction systems by state-of-the-art computational models in an integrated, unified form. Special attention is paid to understanding and modeling the interaction between individual coal particles and a surrounding hot gas, including heterogeneous and homogeneous chemical reactions inside the particle on the particle interface and near the interface between the solid and gas phases. While serving the needs of engineers involved in industrial research, development and design in the field of gasification technologies, this book's in-depth coverage makes it equally ideal for young and established researchers in the fields of thermal sciences and chemical engineering with a focus on heterogeneous and homogeneous reactions.
Download or read book The Science of Victorian Brown Coal written by R.A. Durie and published by Butterworth-Heinemann. This book was released on 2013-10-22 with total page 767 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Science of Victorian Brown Coal provides extensive information on Victorian brown coal, which is a major fossil fuel resource by any standard and constitutes about 97% of Victoria's recoverable energy reserves. Energy from brown coal has been the mainstay of the Victorian economy, providing low-cost electricity to the state grid, briquettes as a fuel for industry and town gas prior to the discovery of natural gas. Because of the unique properties of the coal, it has been necessary to develop an in-depth scientific knowledge of the coal and its behavior, as well as innovative technologies for its effective utilization. The economic benefit brown coal has provided to Victoria is demonstrated throughout the chapters. This book aims to provide the springboard for further research and lead to a new era in the development of value-added products and the more efficient utilization of this major resource. This text is a useful reference for students or individuals conducting research on fossil fuel energy, specifically on brown coals.
Download or read book Mathematical Modeling of Entrained flow Coal Gasification Reactors written by Anil Goyal and published by . This book was released on 1980 with total page 594 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dynamic Simulation of a Single stage Entrained Flow Coal Gasifier written by and published by . This book was released on 1982 with total page 519 pages. Available in PDF, EPUB and Kindle. Book excerpt: A transient, multidimensional computer model has been developed to simulate the detailed phenomena occurring in the general class of single-stage entrained flow gasification reactors. Application of the computer simulation code has been specifically demonstrated for the Texaco class of gasifiers. The EEF (EPRI Entrained Flow) computer simulation model accounts for the coupled chemistry and turbulent hydrodynamics associated with coal-water slurry and oxygen injection including droplet and coal moisture vaporization, coal pyrolysis, char combustion and gasification, gas phase combustion as well as intraphase and interphase (turbulent) transport of mass, momentum, and energy. A generalized finite element geometry is used in one-dimensional, two-dimensional (Cartesian or axisymmetric), and three- dimensional modes. The theoretical formulation of the model is presented and several calculations of different types described. Three different approximations to the Texaco reactor design have been examined and the resulting similarities/differences discussed. Possible implications for scaleup and gasification-combined cycle operation have been noted.
Download or read book Solid Fuels Combustion and Gasification written by Marcio L. de Souza-Santos and published by CRC Press. This book was released on 2004-06-07 with total page 480 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bridging the gap between theory and application, this reference demonstrates the operational mechanisms, modeling, and simulation of equipment for the combustion and gasification of solid fuels. Solid Fuels Combustion and Gasification: Modeling, Simulation, and Equipment Operation clearly illustrates procedures to improve and optimize the de
