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|a (TOE)ost812557
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|a (TOE)812557
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|a TOE
|c TOE
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|a GDWR
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|a E 1.99:812557
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|a E 1.99:812557
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|a SEQUESTERING CARBON DIOXIDE IN COALBEDS
|h [electronic resource]
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| 260 |
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|a Morgantown, W.Va. :
|b National Energy Technology Laboratory (U.S.) ;
|a Oak Ridge, Tenn. :
|b distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy,
|c 2001.
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| 300 |
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|a 32 pages :
|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 the Information Bridge: DOE Scientific and Technical Information.
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| 500 |
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|a 06/15/2001.
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| 500 |
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|a K.A.M. Gasem; R.L. Robinson, Jr.; L.R. Radovic.
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| 500 |
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|a (US)
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| 513 |
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|a Other Publications;
|b 09/28/1998 - 09/28/1999.
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| 520 |
3 |
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|a The authors' long term goal is to develop accurate prediction methods for describing the adsorption behavior of gas mixtures on solid adsorbents over complete ranges of temperature, pressure and adsorbent types. The major objectives of the project are to: (1) measure the adsorption behavior of pure CO₂, methane, nitrogen and their binary and ternary mixtures on several selected coals having different properties at temperatures and pressures applicable to the particular coal being studied, (2) generalize the adsorption results in terms of appropriate properties of the coals, to facilitate estimation of adsorption behavior for coals other than those studied experimentally, (3) delineate the sensitivity of the competitive adsorption of CO₂, methane and nitrogen to the specific characteristics of the coal on which they are adsorbed; establish the major differences (if any) in the nature of this competitive adsorption on different coals, and (4) test and/or develop theoretically-based mathematical models to represent accurately the adsorption behavior of mixtures of the type for which measurements are made. The specific accomplishments of this project during this reporting period are summarized below in three broad categories outlining experimentation, model development, and coal characterization. (1) Experimental Work: Our adsorption apparatus was reassembled, and all instruments were tested and calibrated. Having confirmed the viability of the experimental apparatus and procedures used, adsorption isotherms for pure methane, carbon dioxide and nitrogen on wet Fruitland coal were measured at 319.3 K (115 F) and pressures to 12.4 MPa (1800 psia). These measurements showed good agreement with our previous data and yielded an expected uncertainty of about 2%. Preparations are underway to measure adsorption isotherms for pure methane, carbon dioxide and nitrogen on two other coals. (2) Model Development: The experimental data were used to evaluate the predictive capabilities of various adsorption models, including the Langmuir/loading ratio correlation, two-dimensional cubic equations of state, and the local density model. In general, all models performed well for Type I adsorption exhibited by methane, nitrogen, and carbon dioxide up to 8.3 MPa (average deviations within 2%). However, for pressures higher than 8.3 MPa (1200 psia), carbon dioxide produced multilayer adsorption behavior similar to Type IV adsorption. Our results to date indicate that the SLD model may be a suitable choice for modeling multilayer coalbed gas adsorption. However, model improvements are required to (a) account for coal heterogeneity and structure complexity, and (b) provide for more accurate density predictions. (3) Coal Characterization: We have identified several well-characterized coals for use in our adsorption studies. The criteria for coal selection has been guided by the need for coals that (a) span the spectrum of properties encountered in coalbed methane production (such as variation in rank), and (b) originate from coalbed methane recovery sites (e.g., San Juan Basin, Black Warrior Basin, etc.). At Pennsylvania State University, we have completed calibrating our instruments using a well-characterized activated carbon. In addition, we have conducted CO₂ and methane uptakes on four samples, including (a) a widely used commercial activated carbon, BPL from Calgon Carbon Corp.; (b) an Illinois No.6 bituminous coal from the Argonne Premium Coal sample bank; (c) a Fruitland Intermediate coal sample; (d) a dry Fruitland sample. The results are as expected, except for a greater sensitivity to the outgassing temperature. ''Standard'' outgassing conditions (e.g., 383.2 K, overnight), which are often used, may not be appropriate for gas storage in coalbeds. Conditions that are more representative of in-situ coal (approximately 313.2 K) may be much more appropriate. In addition, our results highlight the importance of assessing the degree of approach to adsorption equilibrium.
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| 536 |
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|b FC26-98FT40426.
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| 650 |
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7 |
|a Carbon.
|2 local.
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| 650 |
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7 |
|a Bituminous Coal.
|2 local.
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| 650 |
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7 |
|a Degassing.
|2 local.
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| 650 |
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7 |
|a Forecasting.
|2 local.
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| 650 |
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7 |
|a Carbon Dioxide.
|2 local.
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| 650 |
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7 |
|a Equations Of State.
|2 local.
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| 650 |
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7 |
|a Mathematical Models.
|2 local.
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| 650 |
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7 |
|a Coal Deposits.
|2 local.
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| 650 |
|
7 |
|a Activated Carbon.
|2 local.
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| 650 |
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7 |
|a Adsorption Isotherms.
|2 local.
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| 650 |
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7 |
|a Simulation.
|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 Oklahoma State University.
|4 res.
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| 710 |
2 |
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|a National Energy Technology Laboratory (U.S.).
|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.
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| 856 |
4 |
0 |
|u http://www.osti.gov/servlets/purl/812557/
|z Online Access
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| 907 |
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|a .b69931434
|b 03-06-23
|c 03-31-12
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| 998 |
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|a web
|b 03-31-12
|c f
|d m
|e p
|f eng
|g wvu
|h 0
|i 2
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| 956 |
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|a Information bridge
|
| 999 |
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|i 350c870e-4569-5787-abfd-49b9392d9595
|s 768613a9-8c6a-5c0f-bbc5-78b7264e6b9e
|
| 952 |
f |
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|p Can circulate
|a University of Colorado Boulder
|b Online
|c Online
|d Online
|e E 1.99:812557
|h Superintendent of Documents classification
|i web
|n 1
|
