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Title: Induced biochemical interactions in crude oils

In the evolution of oil from sedimentary to reservoir conditions, the hydrogen to carbon ratios decrease while the oxygen, nitrogen, and sulfur to carbon ratios increase. During this process, the oils become heavier and richer in asphaltenes. In terms of chemical composition, the oils become enriched in resins, asphaltenes, and polar compounds containing the heteroatoms and metals. Over the geological periods of time, the chemical and physical changes have been brought about by chemical, biological (biochemical) and physical (temperature and pressure) means as well as by the catalytic effects of the sedimentary matrices, migration, flooding, and other physical processes. Therefore, different types of oils are the end products of a given set of such interactions which were brought about by multiple and simultaneous physicochemical processes involving electron transfer, free radical, and chemical reactions. A biocatalyst introduced into a reaction mixture of the type produced by such reactions will seek available chemical reaction sites and react at the most favorable ones. The rates and the chemical pathways by which the biocatalytic reactions will proceed will depend on the oil type and the biocatalyst(s). Some of the possible reaction pathways that may occur in such complex mixtures are discussed.
Authors:
;
Publication Date:
OSTI Identifier:
458602
Report Number(s):
BNL--63169; CONF-960807--15
ON: DE97002903
DOE Contract Number:
AC02-76CH00016
Resource Type:
Conference
Resource Relation:
Conference: 212. national meeting of the American Chemical Society (ACS), Orlando, FL (United States), 25-30 Aug 1996; Other Information: PBD: Aug 1996
Research Org:
Brookhaven National Lab., Upton, NY (United States)
Sponsoring Org:
USDOE Assistant Secretary for Fossil Energy, Washington, DC (United States)
Country of Publication:
United States
Language:
English
Subject:
02 PETROLEUM; PETROLEUM; BIOCONVERSION; BIOCHEMICAL REACTION KINETICS; CATALYSTS; GAS CHROMATOGRAPHY; MASS SPECTROSCOPY; DESULFURIZATION; DENITRIFICATION; DEMETALLIZATION