Fuel product produced by demetalizing a fossil fuel with an enzyme
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United States of America Patent
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Mar 10, 1998
Grant Date -
N/A
app pub date -
Mar 17, 1997
filing date -
Jun 2, 1995
priority date (Note) -
Expired
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Abstract
The invention relates to a method of removing metals from a fossil fuel comprising the steps of contacting the fossil fuel with a biocatalyst selected from the group consisting of an enzyme which degrades porphyrin molecules under conditions suitable for the removal of the metals from the fossil fuel; and separating the metals from the fossil fuel. Preferred embodiments of the biocatalyst include heme oxygenase and cytochrome C reductase, such as cytochrome C reductase from Bacillus megaterium, Catharanthus roseuse, Escherichia coli, animal cells, plant cells or yeast cells. The cytochrome C reductase can be contacted with the fossil fuel in an aqueous medium as a substantially cell-free preparation or cell preparation. In one embodiment of the invention, the metals are recovered from the resulting metal containing stream.
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