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|a (TOE)ost5760343
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|a (TOE)5760343
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|a TOE
|c TOE
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|a GDWR
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|a 01
|2 edbsc
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|a E 1.99:doe/pc/60800-14
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|a E 1.99:doe/pc/60800-14
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| 088 |
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|a doe/pc/60800-14
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| 245 |
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|a Active sites in char gasification
|h [electronic resource] :
|b Final technical report.
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| 260 |
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|a Providence, R.I. :
|b Brown University ;
|a Oak Ridge, Tenn. :
|b distributed by the Office of Scientific and Technical Information, U.S. Department of Energy,
|c 1987.
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| 300 |
|
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|a Pages: 251 :
|b digital, PDF file.
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| 336 |
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|a text
|b txt
|2 rdacontent.
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| 337 |
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|a computer
|b c
|2 rdamedia.
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| 338 |
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|a online resource
|b cr
|2 rdacarrier.
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| 500 |
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|a Published through SciTech Connect.
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| 500 |
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|a 09/01/1987.
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| 500 |
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|a "doe/pc/60800-14"
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| 500 |
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|a "DE88000893"
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|a Suuberg, E.M.; Calo, J.M.; Lilly, W.D.; Wojtowicz, M.; Perkins, M.T.; Hradil, G.
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| 520 |
3 |
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|a Among the key variables in the design of gasifiers and combustors is the reactivity of the chars which must be gasified or combusted. Significant loss of unburned char is unacceptable in virtually any process; the provision of sufficient residence time for complete conversion is essential. A very wide range of reactivities are observed, depending upon the nature of the char in a process. The current work focuses on furthering the understanding of gasification reactivities of chars. It has been well established that the reactivity of char to gasification generally depends upon three principal factors: (1) the concentration of ''active sites'' in the char; (2) mass transfer within the char; and (3) the type and concentration of catalytic impurities in the char. The present study primarily addresses the first factor. The subject of this research is the origin, nature, and fate of active sites in chars derived from parent hydrocarbons with coal-like structure. The nature and number of the active sites and their reactivity towards oxygen are examined in ''model'' chars derived from phenol-formaldehyde type resins. How the active sites are lost by the process of thermal annealing during heat treatment of chars are studied, and actual rate for the annealing process is derived. Since intrinsic char reactivities are of primary interest in the present study, a fair amount of attention was given to the model char synthesis and handling so that the effect of catalytic impurities and oxygen-containing functional groups in the chemical structure of the material were minimized, if not completely eliminated. The project would not be considered complete without comparing characteristic features of synthetic chars with kinetic behavior exhibited by natural chars, including coal chars.
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| 536 |
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|b FG22-83PC60800.
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| 650 |
|
7 |
|a Adsorption Isotherms.
|2 local.
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| 650 |
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7 |
|a Chars.
|2 local.
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| 650 |
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7 |
|a Chemical Preparation.
|2 local.
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| 650 |
|
7 |
|a Chemical Reaction Kinetics.
|2 local.
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| 650 |
|
7 |
|a Chemical Reactions.
|2 local.
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| 650 |
|
7 |
|a Gasification.
|2 local.
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| 650 |
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7 |
|a Heat Treatments.
|2 local.
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| 650 |
|
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|a Impurities.
|2 local.
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| 650 |
|
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|a Catalytic Effects.
|2 local.
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| 650 |
|
7 |
|a Oxygen.
|2 local.
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| 650 |
|
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|a Chemisorption.
|2 local.
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| 650 |
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7 |
|a Activation Energy.
|2 local.
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| 650 |
|
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|a Annealing.
|2 local.
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| 650 |
|
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|a Arrhenius Equation.
|2 local.
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| 650 |
|
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|a Carbonization.
|2 local.
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| 650 |
|
7 |
|a Coal Gasification.
|2 local.
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| 650 |
|
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|a Complexes.
|2 local.
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| 650 |
|
7 |
|a Defects.
|2 local.
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| 650 |
|
7 |
|a Experimental Data.
|2 local.
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| 650 |
|
7 |
|a Infrared Spectra.
|2 local.
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| 650 |
|
7 |
|a Mass Transfer.
|2 local.
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| 650 |
|
7 |
|a Resins.
|2 local.
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| 650 |
|
7 |
|a Surface Area.
|2 local.
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| 650 |
|
7 |
|a Temperature Dependence.
|2 local.
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| 650 |
|
7 |
|a Time Dependence.
|2 local.
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| 650 |
|
7 |
|a Data.
|2 local.
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| 650 |
|
7 |
|a Decomposition.
|2 local.
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| 650 |
|
7 |
|a Elements.
|2 local.
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| 650 |
|
7 |
|a Energy.
|2 local.
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| 650 |
|
7 |
|a Equations.
|2 local.
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| 650 |
|
7 |
|a Information.
|2 local.
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| 650 |
|
7 |
|a Isotherms.
|2 local.
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| 650 |
|
7 |
|a Kinetics.
|2 local.
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| 650 |
|
7 |
|a Nonmetals.
|2 local.
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| 650 |
|
7 |
|a Numerical Data.
|2 local.
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| 650 |
|
7 |
|a Organic Compounds.
|2 local.
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| 650 |
|
7 |
|a Organic Polymers.
|2 local.
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| 650 |
|
7 |
|a Petrochemicals.
|2 local.
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| 650 |
|
7 |
|a Petroleum Products.
|2 local.
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| 650 |
|
7 |
|a Polymers.
|2 local.
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| 650 |
|
7 |
|a Pyrolysis Products.
|2 local.
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| 650 |
|
7 |
|a Reaction Kinetics.
|2 local.
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| 650 |
|
7 |
|a Separation Processes.
|2 local.
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| 650 |
|
7 |
|a Sorption.
|2 local.
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| 650 |
|
7 |
|a Spectra.
|2 local.
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| 650 |
|
7 |
|a Surface Properties.
|2 local.
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| 650 |
|
7 |
|a Synthesis.
|2 local.
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| 650 |
|
7 |
|a Thermochemical Processes.
|2 local.
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| 650 |
|
7 |
|a Coal, Lignite, And Peat.
|2 edbsc.
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| 710 |
2 |
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|a Brown University.
|4 res.
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| 710 |
1 |
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|a United States.
|b Department of Energy.
|b Office of Scientific and Technical Information.
|4 dst.
|
| 856 |
4 |
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|u http://www.osti.gov/servlets/purl/5760343/
|z Online Access
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| 907 |
|
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|a .b76274445
|b 03-07-23
|c 12-11-13
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| 998 |
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|a web
|b 12-11-13
|c f
|d m
|e p
|f eng
|g
|h 0
|i 3
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| 956 |
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|a Information bridge
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| 999 |
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|i a6bbaa05-1c69-5cff-acea-996ec723c865
|s 1a75a132-6d99-5a0b-85bb-de7054a288b6
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| 952 |
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|p Can circulate
|a University of Colorado Boulder
|b Online
|c Online
|d Online
|e E 1.99:doe/pc/60800-14
|h Superintendent of Documents classification
|i web
|n 1
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