Illinois coal

Table 1. Experimental [10] and calculated in accordance with the equation (10) values of swelling degree of the coal Illinois JVs 6... 

Table 3. Experimental [10] and calculated accordingly to equation (14) values of the logarithms of the constants rate of the coals Illinois JV 6 swelling... 

Coal Illinois No. 6 Texas Lignite Appalachian Bit. Illinois No. 6 Illinois No. 6 Illinois No. 6... 

Pocahontas 3 low volatile bituminous coal, Illinois 6 high volatile bituminous coal, Wyodak subbituminous coal, and Beulah-Zap lignite from the Argonne Premium Coal Sample Bank were used as feed coals m these experiments. Ultimate analyses for these coals are listed in Table I. Coal samples were stored under argon in sealed ampules prior to use in pretreatment and liquefaction experiments. 

It was determined that only two surface functions were necessary to correlate all of the rate data. The experimental rate constants of the high oxygen coals (Illinois and Wyoming) correlated with i, the fraction of surface sites... 

A combination of triflic acid with iodine was shown to be effective to liquefy three types of coal in toluene or tetralin under hydrogen pressure.141 The major role of acid was found to enhance coal depolymerization to asphaltenes, whereas the main function of iodine was to hydrogenate and hydrocrack asphaltenes to oils. The combined catalytic system removed 50% of the nitrogen and 90% of the sulfur of the coals (Illinois No. 6 and Pittsburg seam samples). 

PROPERTIES OP WYODAK H-COAL, ILLINOIS H-COAL, AND SRC-II SYNCRUDES... 

Harvey, R.D. Cahill, R.A. Chou, C.-L. Steele, O.D. "Mineral Matter and Trace Elements in the Herrin and Springfield Coals, Illinois Basin Coal Field," Illinois State Geological Survey, April, 1983 pp. 3, 103. 

Ruch, R.R. Gluskoter, H.O. N.F. Shimp "Occurrence and Distribution of Potentially Volatile Trace Elements in Coal," Illinois State Geological Survey, Environmental Geology Notes, Number 72, August 1974. 

Illinois 6 bituminous coal and Wyoming subbituminous coal were specified initially as project coals and DOE, Carter Oil, EPRI and JCLD chose additional coals for evaluation. Operations of the 250 T/D liquefaction pilot plant are to include processing three coals Illinois 6, a subbituminous coal, and a third coal to be selected by the project sponsors. 

Coal. Illinois No. 6 coal from the Burning Star Mines was used in this study. It was obtained from Hydrocarbon Research, Inc., Trenton, New Jersey. It was crushed to ca. 70% through 100 mesh, dried to about 2% moisture, placed in plastic bags, and blanketed under nitrogen by HRI before shipment. Proximate and ultimate analyses of this coal appear in Table I. 

Wyomi ng Subbituminous Coal North Dakota Lignite Kentucky Bituminous Coal Illinois Bituminous Coal ... 

The SRC s used in this study were obtained from the SRC process demonstration unit operated by Southern Services Inc. in Wilsonville, Alabama. Three SRC s were studied and these products were derived from the following coals Illinois No. 6 Burning Star, Illinois No. 6 Monterey, and Wyodak (Amax). The as-received SRC s were wet owing to a water quench and therefore each SRC was dried carefully before sampling and analysis. The vacuum resid was prepared by laboratory vacuum distillation of an atmospheric resid obtained from a commercial refinery source. The identification and source of the coal liquid samples used in this study along with other pertinent information are presented in Table I. 

To determine whether of not the reductive step does indeed cause an increase in the population of free radicals, we studied two coals, Illinois No. 6 from the Monterey mine and a subbituminous coal from the Wyodak mine, both before treatment and after about 3 days of reductive procedure. To obtain an idea of the maximum possible free radical population, we titrated the solution prior to filtration to determine the amount of alkali metal consumed per gram of coal. Thus if every alkali metal atom generated a radical anion in the coal, we should see approximately 5 to 10 mmol of spin per gram of coal. 

The effect of pyrite removal was also clearly demonstrated ( 0). For Burning Star coal (Illinois No. 6), the oil yield for run-of-mine coal (4.8% pyrite) was 47%. Conventional cleaning to 1.5% pyrite resulted in an oil yield of 42%. Deep cleaning to 0.5% pyrite followed by addition of 5.3% pyrite to the clean coal produced an oil yield of 51%, even though the operating pressure (1800 psi) was lower than in the other runs (2250 psi). 

Most of the mineral matter was removed from a representative coal (Illinois No. 6) by first leaching the finely ground material with a hot alkaline solution and then washing the product with a mineral acid and water. The effectiveness of various alkalis for converting or extracting mineral matter decreased in the following order ... 

Pittsburgh Seam hvab Coal Illinois No. 6 hvcb Coal N. Dakota Lignite... 

Western U.S. coals Illinois coals Appalachian coals Eastern coals... 

---