Calcium Phosphate Catalysts for Ethanol Coupling to Butanol and Butadiene
Journal Article
·
· Catalysis Letters
- University of Virginia, Charlottesville, VA (United States); University of Virginia
- University of Virginia, Charlottesville, VA (United States)
The catalytic conversion of ethanol to butanol and butadiene at 633 K and atmospheric pressure (7 vol% ethanol) was studied over calcium phosphate materials pretreated over a wide temperature range. For calcium phosphate pretreated at or below 923 K, the resulting solid had an apatite structure identified by X-ray diffraction and strong acid sites probed by triethylamine (TEA) adsorption microcalorimetry. The low temperature pretreated materials were not effective at ethanol coupling reactions but instead were highly selective to acid-catalyzed products ethene and diethyl ether. Pretreatment of calcium phosphate at 973 K transformed the apatite structure to β-tricalcium phosphate, which exposed both acid and base sites evaluated by TEA and CO2 adsorption microcalorimetry. In conclusion, high temperature pretreated calcium phosphate catalysts formed the coupling products butanol and butadiene during ethanol reaction. The butadiene selectivity was improved by supporting calcium phosphate on zirconia.
- Research Organization:
- University of Virginia, Charlottesville, VA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- FG02-95ER14549
- OSTI ID:
- 1656838
- Journal Information:
- Catalysis Letters, Journal Name: Catalysis Letters Journal Issue: 3 Vol. 151; ISSN 1011-372X
- Publisher:
- SpringerCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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