Wyoming subbituminous coal

Coal Wyoming Subbituminous Conditions Oxygen-Blown 400 psig... 

The TOSCOAL Process. The Oil Shale Corp. (TOSCO) piloted the low temperature carbonization of Wyoming subbituminous coals over a two-year period in its 23 t/d pilot plant at Rocky Falls, Colorado (149). The principal objective was the upgrading of the heating value in order to reduce transportation costs on a heating value basis. Hence, the soHd char product from the process represented 50 wt % of the starting coal but had 80% of its heating value. 

Figure 4. Electron micrograph of an ultrathin section of a resin inclusion in vitrain in a Wyoming subbituminous coal. X 42,000...

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. 

Two reference coals and the CSD SRC were pyrolyzed in an argon atmosphere in the DTFS at 2800°F furnace wall temperature (Figure 3) In a residence time of about 330 milliseconds, Wyoming subbitumin-ous (WSB) coal evolved about 50% of its mass as volatile matter the Kentucky high volatile bituminous (KHB) coal evolved about 53% volatile matter and the CSD SRC evolved about 99% volatile matter. These are much higher than the ASTM volatile matter values of 40.2, 37.3, and 59.8% for the WSB, KHB, and CSD fuels, respectively. 

Wyoming subbituminous coal, whose analyses are given in Table II, was processed in both the PDU and a bench-scale reactor (BSR). The PDU is a 3 ton/day system while the BSR was designed for 3 lb/hr. The properties of tar produced in these two different systems under similar conditions were almost the same as shown in Table III. 

TABLE V. CATALYTIC LIQUEFACTION OF WYOMING SUBBITUMINOUS COALS WITH SYNTHESIS GAS... 

A set of 17 reactions was written to simulate the reactor events and they included 1 reaction for drying, 8 parallel reactions for devolatilization, 5 reactions for gasification and 3 reactions for combustion. The kinetic and thermodynamic parameters for these reactions were derived for a Wyoming subbituminous coal. 

Acyclic Hydrocarbons. Capillary GC comparison of retention times with authentic standards and GC/MS were used to characterize the acyclic alkanes present in the CHX extracts. The extracts of Beulah 3 North Dakota lignite (B3), Wyodak Wyoming subbituminous coal (WYOl), Highvale Alberta subbituminous coal (ALBl), and Powhatan Ohio bituminous coal (POWl) all contained homologous series of n-alkanes. Table III. The low-rank coal CHX extracts for the limited members of the... 

The chloroform extraction of seven coals yielded extracts that gave unique capillary GC profiles. The coal extract profiles fell into four groups 1) BBl, BB2 Texas lignites) and MOC (Australian lignite) 2) B3 (North Dakota lignite) and WYOl (Wyoming, subbitumin-ous) 3) ALBl (Alberta, Canadian subbituminous) and 4) POWl (Ohio, bituminous coal). 

In the present study we investigated pyrolysis of various ranks of coals under different gaseous environments. Low-rank coals such as Wyoming subbituminous coal and North Dakota lignite were pyrolyzed and their results were compared with Kentucky and Illinois bituninous coals. 

The coals used in this study included Wyoming subbituminous coal. North Dakota lignite, Kentucky bituminous coal, and Illinois No. 6 bituminous coal. Proximate and ultimate analyses of the coals studied are given in Table I. 

P. R. Solomon and R. M. Carangelo, Characterization of Wyoming Subbituminous Coals and Liquefaction Products by Fourier Transform Infrared Spectrometry, EPRI Final Report for Contract 1604-2. (Sept., 1981)... 

Figure 7. C CP/MAS spectra of Wyoming subbituminous coal before and after reverse combustion, and a cored (test) sample. Key a, original coal b, reverse-combusted coal and c, cored sample. (Reproduced, with permission, from Ref. 9e. Copyright 1981, American Institute of Physics.)...

Destec-Typical Material Balance and Principal Energy Flows for Wyoming Subbituminous Coal... 

EPRI Studies. In 1987, EPRI contracted with Fluor Daniel and Destec to conduct a detailed technical and economic analysis of IGCC power generation based on 400-MW plants for both Texas lignite and Wyoming subbituminous coal (9). Central and South West Services, Houston Lighting and Power, Texas Utilities Electric Company, and the Salt River Project also participated in this analysis. 

Properties. Results for the operation using subbituminous coal from the Wyodad mine near Gillette, Wyoming, are shown in Table 13. Char yields decreased with increasing temperature, and oil yields increased. The Fischer assay laboratory method closely approximated the yields and product assays that were obtained with the TOSCOAL process. 

Campbell county Wyodak-Anderson coal USA Rocky Mountain subbituminous Wyoming 3.6, 3.5... 

USA Utah—Wyoming Hams Fork subbituminous-bituminous 29 samples 0.70-21 U.S. Geological Survey Coal Quality Database (2006)... 

PANELIST WOLK They have been looking for deposits of calcium processing Wyoming coal. I think there have been some very small concentrations of oolite, like structures found in the residues that have been looked at. Obviously, some of the calcium ends up on the catalyst, but it is a small proportion. The wall deposits have been checked for calcium concentration and they have been minimal. Whether that is a function of the reactor diameter using the PDU, the turbulence of the bed or really a lack of detailed observation, I don t really know. But it has not proved to be an operating problem with the H-Coal process. The period of time covered with subbituminous coal runs have been as long as thirty days. 

The feed for the plant nominally is subbituminous coal from the Powder River Basin in Wyoming. However, the project has been designed to use other lower rank coals, including lignite. In early 1989, the project tested bituminous coals to prove the process for its application to higher rank coals. 

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