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- W2043808130 abstract "Abstract Iron-titanium alloy forms a reversible metal hydride which stores hydrogen as atomic hydrogen within its metal matrix at a density exceeding liquid hydrogen. The alloy has also been shown to have substantial catalytic properties towards hydrogenation reactions. In this paper we examine the alloy as a vehicle to both transport and distribute hydrogen to slurried coal and catalyze the liquefaction process. Batch liquefaction experiments produced conversions of approximately 50% for industrially handled Utah (SUFCO) and Alabama Blue Creek coals slurried in either tetralin or 1-methylnaphthalene in less than 30 min at a temperature of 260°C and a pressure of 4.14 MPa. Comparison of the liquefaction results in tetralin and 1-methylnaphthalene suggested that tetralin was involved as a shuttling agent rather than a donor solvent for this approach. This catalytic process reduced the nitrogen, sulfur, and oxygen contents of the Utah coal by 25%, 50%, and 89.5% respectively, while the sulfur content of the Alabama coal was reduced by 34%. Both a simple first order mechanism and a more complex second order mechanism closely modeled the liquefaction data. Calculation, based on a run using non-hydrided FeTi, produced a catalytic turnover number of 3·10 −2 molecules of hydrogen per site per s. This approach overcomes problems encountered in other liquefaction processes, while converting coal to liquid products at reduced operating conditions. A hydrogen adsorption study of the spent alloy showed a 4% deactivation of the catalyst." @default.
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- W2043808130 date "1988-11-01" @default.
- W2043808130 modified "2023-09-27" @default.
- W2043808130 title "Coal liquefaction using an intermetallic hydride to distribute hydrogen and catalyze the reaction" @default.
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- W2043808130 doi "https://doi.org/10.1016/s0166-9834(00)80044-5" @default.
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