352 K
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TitleSuperacid Catalyzed Depolymerization and Conversion of Coals. Final Technical Report. [HF:BF{sub 2}/H{sub 2}]
Author(s)Olah, G.
Publication Date1980
Report NumberDOE/ER/10340-T1
Unique IdentifierACC0356
Other NumbersLegacy ID: DE83013036; OSTI ID: 6202497
Research OrgUniversity of Southern California, Los Angeles (USA)
Contract NoAT03-79ER10340
Sponsoring OrgUS Department of Energy (DOE)
Subject01 Coal, Lignite, and Peat; Catalysts; Comparative Evaluations; Coal; Hydrogenation; Coal Extracts; Nuclear Magnetic Resonance; Coal Liquefaction; Organic Solvents; Solvent Extraction; Yields; Carbonaceous Materials; Chemical Reactions; Energy Sources; Extraction; Fossil Fuels; Fuels; Liquefaction; Magnetic Resonance; Materials; Resonance; Separation Processes; Solvents; Thermochemical Processes
Related Web PagesGeorge A. Olah, Carbocation and Hydrocarbon Chemistry
AbstractWe were interested in applying superacid catalyzed cleavage-depolymerization and ionic hydrogenation low temperature conversion of coal to liquid hydrocarbon, as well as obtaining information about the reactions involved and the structure of intermediates of the coal liquefaction process. In order to show the feasibility of our proposed research we have carried out preliminary investigation in these areas. Preceding our work there was no practical application of a superacid system to coal liquefaction. We carried out an extensive study of the potential of the HF:BF{sub 3}/H{sub 2} system for coal hydroliquefaction. Under varying conditions of reactant ratio, reaction time and temperature, we were able to obtain over 95% pyridine extractible product by treating coal in HF:BF{sub 3}:H{sub 2} system at approx. 100 degrees C for 4 hours. The coal to acid ratio was 1:5 and FB{sub 3} at 900 psi and H{sub 2} at 500 psi were used. These are extremely encouraging results in that the conditions used are drastically milder than those used in any known process, such as Exxon donor solvent and related processes. The cyclohexane extractibility of the treated coal was as high as 27% and the yield of liquid distillate at 400 degrees C/5 x 10{sup -3}/sup torr/ was approx. 30%. The infrared spectrum of product coal, extracts and distillates were distinctly different from the starting coal and show a significant increase in the amount of saturates. The {sup 1}H NMR spectrum of cyclohexane extract of the treated coal shows essentially all aliphatic photons. The spectra of other treated coal extracts show increased amounts and types of aliphatic protons as well as significant amounts of protons bound to unsaturated sites. This again indicates that the HF-BF{sub 3} system is depolymerizing the coal to small fragments which are soluble in non-polar solvents.
352 K
8 pp.
 
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