Characterization Of Residues From Selected Coal Conversion Processes
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Characterization Of Residues From Selected Coal Conversion Processes
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Author : Eddie Martin (Minerals engineer)
language : en
Publisher:
Release Date : 1980
Characterization Of Residues From Selected Coal Conversion Processes written by Eddie Martin (Minerals engineer) and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1980 with Coal categories.
Characterization Of Residues From Selected Coal Conversion Processes
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Author : Eddie Martin
language : en
Publisher:
Release Date : 1980
Characterization Of Residues From Selected Coal Conversion Processes written by Eddie Martin and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1980 with Coal categories.
Characterization Of Residues From Selected Coal Conversion Processes
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Author : Eddie Martin
language : en
Publisher:
Release Date : 1980
Characterization Of Residues From Selected Coal Conversion Processes written by Eddie Martin and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1980 with Coal categories.
Characterization Of Residue From Direct Coal Liquefaction And Determination Of Its Potential Applicability As A Source Of Fuel
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Author : Nitya Iyer
language : en
Publisher:
Release Date : 2015
Characterization Of Residue From Direct Coal Liquefaction And Determination Of Its Potential Applicability As A Source Of Fuel written by Nitya Iyer and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with Coal liquefaction categories.
Direct coal liquefaction is a technology for producing liquid products from coal. One of the by-products from this process is coal liquefaction residue, which is remaining coal that was not converted to liquid products during the liquefaction process. The residue is enriched in mineral matter and the organic content is more refractory.The objective of our work was to characterize the residue produced under different DCL operating conditions and to evaluate the performance of the residue as a feed for gasifcation and combustion. The feed to the direct coal liquefaction process was Canadian sub-bituminous Coal Valley (CV) coal. The industrial solvents employed were hydrotreated (under N2 and H2) and non-hydrotreated poly-aromatic hydrocarbons (under N2). Different residues were obtained from the process, conducted at four different temperatures ranging from 300-450 C in an autoclave reactor (0.25 L) at an initial pressure of 20 bar. Coal liquid yields obtained for liquefaction using hydrotreated solvent were found to be much better, under the same operating conditions. Thus, effect of solvent and temperature in coal liquefaction is discussed briefly. The residues were further characterized for their mineral composition, organic content and particle sizes using various standard techniques: Thermogravimetic analyser (TGA), elemental analyser, mastersizer, FTIR spectrometer, X-ray fluorescence, surface area analyser. A great deal of variation in the chemical and physical composition of the residues were observed and found to be closely related to the efficiency of the process. In order to further investigate the potential applicability of liquefaction residues as a feedstock for boilers and gasifiers, the residues from the Coal Valley sub-bituminous coal liquefaction in hydrotreated solvent (N2) were gasified in a TGA. This proved to be a useful platform for comparison of the reactivity of the residues with that of raw coal. The kinetic parameters for the process were also determined under isothermal gasification conditions at temperatures 800 C, 950 C and 1000 C under O2 and at 950 C, 1000 C and 1100 C under CO2. Further, in order to determine the practical applicability of the coal residues as boiler feed, an entrained flow reactor (drop tube furnace) was employed to test the conversion efficiency of the residues. Though higher carbon conversion were found for residues, compared to raw coal, similar concerns due to ash-slagging would be prevalent for both cases.
Residues From Coal Conversion And Utilization
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Author :
language : en
Publisher:
Release Date : 1998
Residues From Coal Conversion And Utilization written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with categories.
The goals of the project are two-fold: 1) to upgrade semi-quantitative X-ray diffraction(QXRD) methods presently used in analyzing complex coal combustion by-product (CCB)systems, with the quantitative Rietveld method, and 2) to apply this method to a set of by-product materials that have been disposed or utilized for a long period (5 years or more) in contact with the natural environment, to further study the nature of CCB diagenesis. The project is organized into three tasks to accomplish these two goals: 1) thorough characterization of a set of previously analyzed disposed by-product materials, 2) development of a set of CCB specific protocols for Rietveld QXRD, and 3) characterization of an additional set of disposed CCB materials, including application of the protocols for Rietveld QXRD developed in Task 2.
Ein Gehapter Ratschlag Lucipers Des F Rsten Der Finstern Ss Mit Seinen Amptle Ten Und Miterben Der Ewigen Verdamn Ss
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Author :
language : en
Publisher:
Release Date : 1521
Ein Gehapter Ratschlag Lucipers Des F Rsten Der Finstern Ss Mit Seinen Amptle Ten Und Miterben Der Ewigen Verdamn Ss written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1521 with categories.
Sourcebook Of Methods Of Analysis For Biomass And Biomass Conversion Processes
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Author : T. Milne
language : en
Publisher: Springer Science & Business Media
Release Date : 1990-09-30
Sourcebook Of Methods Of Analysis For Biomass And Biomass Conversion Processes written by T. Milne and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 1990-09-30 with Science categories.
Health And Environmental Effects Of Coal Gasification And Liquefaction Technologies
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Author : Richard Arthur Brown
language : en
Publisher:
Release Date : 1979
Health And Environmental Effects Of Coal Gasification And Liquefaction Technologies written by Richard Arthur Brown and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1979 with Coal categories.
Characterisation Of Solid Residues From Coal Liquefaction Processes
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Author :
language : en
Publisher:
Release Date : 1983
Characterisation Of Solid Residues From Coal Liquefaction Processes written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1983 with categories.
Coal Liquefaction Process Streams Characterization And Evaluation
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Author :
language : en
Publisher:
Release Date : 1994
Coal Liquefaction Process Streams Characterization And Evaluation written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with categories.
This study evaluated the use of a novel laboratory-scale batch reactor, designed by the University of Delaware, to study the kinetics of coal liquefaction resid reactivity. The short time batch reactor (STBR) is capable of conducting reactions at temperatures up to 450°C and pressures up to 2500 psi at well-defined reaction times from a few seconds to 30 min or longer. Sixty experiments were conducted with the STBR in this project. The products of the resid/tetralin/hydrogen reaction were separated by solubility, and several analytical procedures were used to evaluate the reaction products, including thermogravimetric analysis (TGA), gas chromatography (GC) and gas chromatography/mass spectrometry (GC/MS). Changes were monitored in the boiling ranges of the products, as a function of process conditions (time, temperature, and tetralin donor solvent-to-resid ratio), with and without catalysts. Two distillation resid samples were studied; Sample 1 is the resid of the second stage product stream from Wilsonville Run 259 which used Pittsburgh seam coal (Ireland mine) bituminous coal, and Sample 2 is the resid of the same streak from Wilsonville Run 260 which used Wyodak and Anderson (Black Thunder Mine) subbituminous coal. It was determined that the resid reactivity was different for the two samples studied. The results demonstrate that further development of this experimental method is warranted to empirically assess resid reactivity and to provide data for use in the construction of an empirical model of coal conversion in the direct liquefaction process.
