Solid superacids as coal liquefaction catalysts: Quarterly report, January--March 1989
This research is aimed at exploring the possibility of mild coal liquefaction in the presence of solid superacids, especially oxides of iron, titanium, zirconium, and hafnium mixed with sulfate ions. Fe/sub 2/O/sub 3//SO/sub 4//sup 2/minus// has been shown to be an impressively active catalyst in coal conversion at 400/degree/C. Our objective is to find conditions under which Fe/sub 2/O/sub 3//SO/sub 4//sup 2/minus// and similar systems catalyze the conversion of coal at mild conditions of temperature and pressure. So far, Fe/sub 2/O/sub 3//SO/sub 4//sup 2/minus//, TiO/sub 2//SO/sub 4//sup 2/minus//, ZrO/sub 2//SO/sub 4//sup 2/minus//, and HfO/sub 2//SO/sub 4//sup 2/minus// catalysts have been synthesized and characterized by XRD, BET, IR, acidity measurement, and sulfur analysis. In addition, a comparison of the relative reactivity of these superacids for n-pentane conversion in both batch and fixed bed reactor systems has been carried out. Investigations of the hydrocracking of model compounds, including diphenyl ether and diphenylmethane, was initiated in this quarter. Improvements in methods of synthesis of these acids have been achieved and improved reaction systems and methods of reducing catalyst deactivation are under study. Samples of Fe/sub 2/O/sub 3//SO/sub 4/ have been sent for Moessbauer study; the other solid acids will be examined by EXAFS. 4 refs., 2 tabs.
- Research Organization:
- Pittsburgh Univ., PA (USA). Dept. of Chemical and Petroleum Engineering
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- FG22-87PC79928
- OSTI ID:
- 6133749
- Report Number(s):
- DOE/PC/79928-T7; ON: DE89012586
- Resource Relation:
- Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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Solid superacids as coal liquefaction catalysts
Solid superacids as coal liquefaction catalysts: Quarterly report, October--December 1988
Related Subjects
36 MATERIALS SCIENCE
ETHERS
HYDROCRACKING
HAFNIUM OXIDES
CATALYTIC EFFECTS
HYDROCARBONS
IRON OXIDES
TITANIUM OXIDES
ZIRCONIUM OXIDES
CATALYSTS
COAL LIQUEFACTION
PROGRESS REPORT
SULFATES
CHALCOGENIDES
CHEMICAL REACTIONS
CRACKING
DECOMPOSITION
DOCUMENT TYPES
HAFNIUM COMPOUNDS
IRON COMPOUNDS
LIQUEFACTION
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PYROLYSIS
REFRACTORY METAL COMPOUNDS
SULFUR COMPOUNDS
THERMOCHEMICAL PROCESSES
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
ZIRCONIUM COMPOUNDS
010405* - Coal
Lignite
& Peat- Hydrogenation & Liquefaction
360603 - Materials- Properties