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Hindered Diffusion Of Coal Liquids Quarterly Report No 1 September 18 1992 December 17 1992
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Book Synopsis Hindered Diffusion of Coal Liquids. Quarterly Report No. 1, September 18, 1992--December 17, 1992 by :
Download or read book Hindered Diffusion of Coal Liquids. Quarterly Report No. 1, September 18, 1992--December 17, 1992 written by and published by . This book was released on 1992 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt: The molecules comprising coal liquids can range from less than 10 to several hundred Å in diameter. Their size is, therefore, comparable to the average pore size of most hydroprocessing catalysts. Thus, during processing, transport of these molecules into the catalyst occurs mainly by ''configurational'' or ''hindered diffusion, '' which is the result of two phenomena occurring in the pores; the distribution of solute molecules in the pores is affected by the pores and the solute molecules experience an increased hydrodynamic drag. The field of hindered diffusion has been reviewed by Deen [16]. The earliest studies in the filed were by Renkin et al. [17].
Download or read book Energy Research Abstracts written by and published by . This book was released on 1994 with total page 806 pages. Available in PDF, EPUB and Kindle. Book excerpt: Semiannual, with semiannual and annual indexes. References to all scientific and technical literature coming from DOE, its laboratories, energy centers, and contractors. Includes all works deriving from DOE, other related government-sponsored information, and foreign nonnuclear information. Arranged under 39 categories, e.g., Biomedical sciences, basic studies; Biomedical sciences, applied studies; Health and safety; and Fusion energy. Entry gives bibliographical information and abstract. Corporate, author, subject, report number indexes.
Book Synopsis Hindered Diffusion of Coal Liquids. Quarterly Report No. 5, September 18, 1993--December 17, 1993 by :
Download or read book Hindered Diffusion of Coal Liquids. Quarterly Report No. 5, September 18, 1993--December 17, 1993 written by and published by . This book was released on 1994 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: The design of industrial catalysts requires that the diffusivity of the reacting species within the catalyst be accurately known. Nowhere is this more important than in the area of coal liquefaction and upgrading of coal liquids. In this area one is faced with the task of processing a number of heavy oils, containing metals and other contaminants, in a variety of process dependent solvents. It is important, therefore, on the basis of predicting catalyst activity, selectivity, and optimizing reactor performance, that the diffusivities of these oil species be accurately known. In this report, the authors report the publication of model studies of the diffusivity of Lennard-Jones particles in porous systems with dimensionality between two and three. Such a modeled system includes pillared clays. They also published a paper which addresses the sorption and aggregation of asphaltene particles with porous media such as catalysts. The paper presents new experimental data for the amount of asphalt precipitation formed with various solvents. The experimental results are compared to model calculations.
Book Synopsis Government reports annual index by :
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Book Synopsis Hindered Diffusion of Coal Liquids. Quarterly Report No. 6, December 18, 1993--March 17, 1994 by :
Download or read book Hindered Diffusion of Coal Liquids. Quarterly Report No. 6, December 18, 1993--March 17, 1994 written by and published by . This book was released on 1994 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: Throughout the experimental runs described herein, the authors utilized a high pressure, high temperature diffusion cell system. This diffusion system has been tested through the measurement of the diffusivity of a number of model coal liquids. The project is of both empirical and theoretical nature and is divided into a number of tasks which are reviewed here.
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Book Synopsis Hindered Diffusion of Coal Liquids. Quarterly Report No. 12, June 18, 1995--September 17, 1995 by :
Download or read book Hindered Diffusion of Coal Liquids. Quarterly Report No. 12, June 18, 1995--September 17, 1995 written by and published by . This book was released on 1995 with total page 49 pages. Available in PDF, EPUB and Kindle. Book excerpt: The design of industrial catalysts requires that the diffusivity of the reacting species within the catalyst be accurately known. Nowhere is this more important than in the area of coal liquefaction and upgrading of coal liquids. In this area one is faced with the task of processing a number of heavy oils, containing metals and other contaminants, in a variety of process dependent solvents. It is important, therefore, on the basis of predicting catalyst activity, selectivity, and optimizing reactor performance, that the diffusivities of these oil species be accurately known. It is the purpose of the project described here to provide such a correct concept of coal asphaltenes by careful and detailed investigations of asphaltene transport through porous systems under realistic process temperature and pressure conditions. The experimental studies will be coupled with detailed, in-depth statistical and molecular dynamics models intended to provide a fundamental understanding of the overall transport mechanisms.
Book Synopsis Pamphlets from and about Bulgaria, Hungary, Romania, and Yugoslavia by :
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Book Synopsis Hindered Diffusion of Coal Liquids. Quarterly Report Number 11, March 18--June 17, 1995 by :
Download or read book Hindered Diffusion of Coal Liquids. Quarterly Report Number 11, March 18--June 17, 1995 written by and published by . This book was released on 1995 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt: The design of industrial catalysts requires that the diffusivity of the reacting species within the catalyst be accurately known. Nowhere is this more important than in the area of coal liquefaction and upgrading of coal liquids. In this area one is faced with the task of processing a number of heavy oils, containing metals and other contaminants, in a variety of process dependent solvents. It is important, therefore, on the basis of predicting catalyst activity, selectivity, and optimizing reactor performance, that the diffusivities of these oil species be accurately known. Contrary to laboratory reactors, where most of the studies of asphaltene's chemical structure have taken place, most industrial reactors are continuous systems. The state of the asphaltene molecule therefore does not only depend on the temperature, pressure and polarity of the solvent but also on the reactor's residence time. It is, therefore, very important to have a correct concept of the asphaltene's structure and through careful experimentation, one can then decide whether such a concept has any practical implications at realistic upgrading conditions. It is the purpose of the project described here to provide such a correct concept of coal asphaltenes by careful and detailed investigations of asphaltenes transport through porous systems under realistic process temperature and pressure conditions. The experimental studies will be coupled with detailed, in-depth statistical and molecular dynamics models intended to provide a fundamental understanding of the overall transport mechanisms. 60 refs.
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Book Synopsis Toxicological Profile for Polycyclic Aromatic Hydrocarbons by :
Download or read book Toxicological Profile for Polycyclic Aromatic Hydrocarbons written by and published by . This book was released on 1995 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :Human Rights Watch (Organization) Publisher :Human Rights Watch ISBN 13 :9781564321879 Total Pages :254 pages Book Rating :4.3/5 (218 download)
Book Synopsis War Without Quarter by : Human Rights Watch (Organization)
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Book Synopsis Anchor of Resolve by : Robert J. Schneller
Download or read book Anchor of Resolve written by Robert J. Schneller and published by Military Bookshop. This book was released on 2007-12-01 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt: This illustrated history covers the history of the U.S. Navy in the Middle East. America's interests in the Middle East, southwest Asia, and eastern Africa date almost to the founding of the nation. Since World War II, the Navy has been the first line of defense for these interests. From the establishment of the Middle East Force (MEF) in 1949 through the beginning of the 21st century, the U.S. Navy served as a force for stability and peace in the region.
Author :Groupe d'experts intergouvernemental sur l'évolution du climat Publisher : ISBN 13 :9789291691432 Total Pages :151 pages Book Rating :4.6/5 (914 download)
Book Synopsis Climate Change 2014 by : Groupe d'experts intergouvernemental sur l'évolution du climat
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Book Synopsis Toxicological Profile for N-nitrosodimethylamine by :
Download or read book Toxicological Profile for N-nitrosodimethylamine written by and published by . This book was released on 1989 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt:
