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Analysis and Optimization of p-Xylene Production Process
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Ashraf, Muhammad Tahir
Advisor(s)
Chebbi, Rached Mohamed
Darwish, Naif Abdelaziz
In this study a process is developed for selective production of p-xylene from toluene methylation using reactive distillation for p-xylene separation. Complete process is simulated in Aspen Plus& and reaction parameters are optimized to get 97.5% p-xylene selectivity using built-in optimization tool. Highly selective p-xylene production greatly reduces the separation cost and also reduces the production of less desired xylene isomers. After separation p-xylene product stream purity of 99.7% is achieved. Then a second law analysis is made on the process developed and lost work of different blocks is compared. Heat integration of the process is done using Aspen Energy Analyzer& resulting in 23% reduced total lost work generation.
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&&2015&&All Rights Reserved.114网址导航Laboratory Investigations of the Mechanism of Cavitation
Knapp, R. T. and Hollander, A.
Laboratory Investigations of the Mechanism of Cavitation.
Transactions of the ASME, 70
pp. 419-433.
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4MbUse this Persistent URL to link to this item: AbstractThe paper describes some experimental investigations of
the formation and collapse of cavitation bubbles. The
experiments were carried on in the high-speed water tunnel
of the Hydrodynamics Laboratory of the California
Institute of Technology under the sponsorship of the Research and Development Division of the Bureau of Ordnance of the U. S. Navy and the Fluid Mechanics Section
of the Office of Naval Research. A detailed study of
the formation and collapse of the individual bubbles has
been carried on by the use of high-speed motion pictures
taken at rates up to 20,000 per sec. From these records
calculations have been made of rate of formation and collapse of the bubbles. Deductions have been drawn from
these results concerning the physical mechanism of the
cavitation phenomenon.Item Type:ArticleAdditional Information:(C) 1948 ASME.
Contributed by the Hydraulic Division and presented at the
Annual Meeting, Atlantic City, N. J., December 1-5, 1947, of the American Society of Mechanical Engineers.
This program is being carried on in the Hydrodynamics Laboratory of the California Institute of Technology as a part of a research project which is being sponsored jointly by the Research and Development Division of the Bureau of Ordnance and the Fluid Mechanics Section of the Office of naval Research, both of the U.S. Navy.
Practically every member of the laboratory staff has contributed substantially to the experiments which furnish the basis of this paper.
In addition, special appreciation is due to Haskell Shapiro and his staff who are responsible for the development and operation of the high-speed flash lamps, and to Hugh S. Bell and Donald Peterson for the photography and particularly for the development and perfection of methods of making projectionable motion-picture-film strips from the original high-speed pictures.Funders:Funding AgencyGrant NumberBureau of OrdnanceUNSPECIFIEDOffice of Naval Research (ONR)UNSPECIFIEDOther Numbering System:Other Numbering System NameOther Numbering System IDHydrodynamics Laboratory67Record Number:CaltechAUTHORS:030868Persistent URL:Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.ID Code:48816Collection:CaltechAUTHORSDeposited By:
Kristin Buxton
Deposited On:25 Aug Last Modified:25 Aug Repository Staff Only:
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