Monterey coal , liquefaction

As reaction severity approaches zero the Monterey coal conversion is about 70 percent and the Wyodak is about 40 percent. Liquefaction appears to occur very rapidly to these levels and then slower to the maximum conversion. The initial liquefaction may be a physical dissolution while the slower rate represents a reaction in which chemical bonds are broken, although other explanations are possible. (10)... 

Figure 9. Elemental analyses of SRC from liquefaction of Monterey coal in —019 solvent (prepared by heptane precipitation)...

Figure 12, Comparison of elemental analyses of nondistillable products from liquefaction of Wyodak and Monterey coals in —019 solvent...

The elemental composition for the initial coal [for Monterey coal (2)] and its short-contact-time liquefaction products (defined as pyridine soluble) are shown in Table II. 

Fig. 14. Preferred liquefaction-coking liquid yields in the EDS process for various coals where Hi represents Flexicoking liquids and , liquefaction liquids (124). A, Ireland (West Virginia) B, Monterey (Illinois) C, Burning Star (Illinois) D, Wyodak (Wyoming) and E, Big Brown (Texas).

The compositions of the SRC product fraction obtained from liquefaction of Monterey bituminous coal with the hydrogen-... 

Figure 11. Comparison of changes in elemental analyses with reaction severity for liquefaction of Monterey bituminous coal in —019 and —035 solvents...

Comparison of analyses of heptane insolubles from the liquefaction of Monterey bituminous and Wyodak subbituminous coals in the hydrogen-enriched solvent shows that carbon, hydrogen and oxygen concentrations converge with increasing reaction severity to form a product with similar elemental analyses. The same convergence is seen when the hydrogen-depleted solvent is used. 

Seven fuels were burned in these initial tests two petroleum fuels, one regular sulfur fuel oil (RSFO) and a low sulfur fuel oil (LSFO), and five EDS fuel oils. The EDS fuel oils were blended from components produced in the one ton per day pilot unit at the Exxon Research and Engineering site in Baytown, Texas. Products from the liquefaction of two coals, a bituminous Illinois coal from the Monterey No. 6 mine, and a sub-bituminous Wyoming coal from the Wyodak mine, were tested. Fuel oil blends were made with products from each of the coals, with and without coker liquids, to produce four of the EDS fuels. The fuel oil derived from Illinois coal containing coker liquids was blended... 

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