Western Kentucky 9 coal

Structure 6. Proposed formal structures of high-molecular-weight fractions obtained by short-contact-time liquifaction of two subbituminous coals. A precursor coal, western Kentucky subbituminous, C = 79.7%, H = 5.4% (dry ashfree), MW —900, Cflr 73%, and Har —60% and B precursor coal, North Dakota subbituminous, C + 75.2%, H = 5.4% (dry ashfree), MW 600, Car 26%, and Har 18%. (Adapted from reference 109.)... 

Properties. A high volatile western Kentucky bituminous coal, the tar yield of which by Fischer assay was ca 16%, gave a tar yield of ca 26% at a pyrolysis temperature of 537°C (146—148). Tar yield peaked at ca 35% at 577°C and dropped off to 22% at 617°C. The char heating value is essentially equal to that of the starting coal, and the tar has a lower hydrogen content than other pyrolysis tars. The product char is not suitable for direct combustion because of its 2.6% sulfur content. 

Figure 6. SEC of coal liquids using the SEC-GC interface online (Figure 2). Fraction collection timing is similar to one used for Wyodak (Figure k) except for Western Kentucky Synthoil where 2M fractions were collected.

Table 7 lists the results of test bums at two coal-combusting power plants a western Kentucky power plant, which burned pure Illinois Basin coal (Table 4) and two blends of this coal + TDF (99 wt% coal + 1 wt% TDF 97 wt% coal + 3 wt% TDF) in a cyclone boiler (Hower et al. 2001) and the Purdue University power plant, which used a stoker boiler to combust a comparable Illinois Basin coal as well as a blend containing 95 wt% of this coal and 5 wt% TDF (Table 4 this study). 

Hower, J. C., Robertson, J. D. Roberts, J. M. 2001. Petrology and minor element chemistry of combustion by-products from the co-combustion of coal, tire-derived fuel, and petroleum coke at a western Kentucky cyclone-fired unit. Fuel Processing Technology, 74, 125-142. 

Compound Coal Type Liquid Pittsburgh Illinois No. 6 Western Kentucky Colstrip Wyodak Lignite... 

For the coal studied here, a bituminous Western Kentucky 9/14 coal, dissolution of the coal has been shown to occur very rapidly, requiring less than 30 minutes to liquefy most of the coal ( 90 percent). However, a relatively long reaction time (120 min.) is required to reduce its sulfur level low enough to meet even the current standards (1). A new short residence time two-stage SRC type process has been suggested by Auburn University (2 ) for solvent refining this coal. This process has been shown to have the potential of producing a low-sulfur solid SRC product that meets the proposed NSPS. It involves the dissolution of the coal... 

Reagents and Materials. Light recycle oil (LRO) and Western Kentucky 9/14 coal were obtained from the Wilsonville SRC Pilot Plant, operated by Southern Company Services, Inc. The LRO contains 0.26% sulfur, and the Western Kentucky 9/14 coal is analyzed to be 67% C, 4.9% H, 3.10% S, and 12% mineral matter. The coal was dried overnight at 100°C and 25 inches Hg vacuum before use. 

The proposed NSPS can be met by hydrotreating the coal liquids obtained by filtering the product from the coal dissolution stage. The desulfurization kinetics can be presented by two parallel first-order rate expression, and hydrogen consumption kinetics can be presented by a first-order rate expression. A linear relationship exists between total sulfur content and SRC sulfur content of the hydrotreated product. For the Western Kentucky bituminous 9/14 coal studied here, the maximum selectivity and lowest SRC conversion to oil for a fixed SRC sulfur content are obtained using the highest reaction temperature (435°C) and the shortest reaction time 7 min.). ... 

Center for Coal Science, Department of Chemistry, Western Kentucky University, Bowling Green, KY 42101... 

Figure L Yields of products from Tet-ralin and the ratio of trans/cis Decalin as a function of added Western Kentucky, Homestead mine coal...

A question of considerable interest in coal hydroliquefaction chemistry is the amount and nature of "organically bound metals in the coal. One reason for this interest is the observation that when supported metal direct conversion catalysts are used in liquefaction reactors, a primary mode of deactivation is metals deposition Q, 2). In particular, recent work at the Pittsburgh Energy Technology Center (PETC) (4,5) and elsewhere (3) has indicated very high levels of titanium deposition on supported Co Mo catalysts used in the fixed bed continuous reactor system. It has been suggested that the culprits in such deposition are soluble metal species (6 9) The analyses of a Western Kentucky (Homestead) hvBb feed coal and of material deposited between the catalyst pellets in the fixed bed reactor at PETC (4) are shown in Table I. 

Western Kentucky Coal 1 lb/hr Flow Western Kentucky Coal 1 lb/hr Flow 2 lb/hr Flow Western Kentucky Coal 1 lb/hr Flow 2 lb/hr Flow Western Kentucky Coal 1 lb/hr Flow 2 lb/hr Flow... 

B BlacksviHe C oal PYK11 = Pyrite from Western Kentucky 11 Coal... 

KY9-14 Western Kentucky 9 and 14 Coals PYR = Pyrite from Robena Mine Coal... 

KY11 Western Kentucky 11 Coal PYVS s Pyrite from Vesta Shannopin Coal... 

CKYC = Clean Western Kentucky Coal LR ASH MT S SB Ash from Liquefaction Residues Magnetite Sulfur... 

J. E. Analyzing Syncrude from Western Kentucky Coal, ERDA-BERC/RI-75/12, Nov. 1975. 

COED (Char Oil Energy Development, FMC Corp.)—hydrotreated pyrolysis oil, 16.6 wt % on dry Western Kentucky coal, and < 10 cP, 900°F endpoint. 

SRC II (Solvent-Refined Coal (SRC) II, Pittsburg and Midway Coal Mining Co.)—hydroliquefaction of coal with slurry recycle, 25.3 wt % on dry Western Kentucky coal, < 10 cP 850°F endpoint. 

FE-1534-44 Chemicals from Coal Interim Report for FMC Corporation COED Pyrolysis Process Western Kentucky Syncrude... 

Heavy oils derived from petroleum were separated by using the method developed by the USBM-API (5) Project 60 and analyzed by means of mass spectroscopy. The procedure used for separation and characterization of petroleum heavy oil was adopted to study heavy oil from coal liquids derived from Char-Oil-Energy-Development (COED) Syncrude from Utah coal (6) and western Kentucky coal (7) and Synthoil from West Virginia coal (i, 8). 

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