Exxonmobil Research and Engineering Company

Bryan M Knickerbocker

Robert J Falkiner

Robert T Peters

Roger Grant Gaughan

David R Slim

Gordon Bryce McGarvey

Timothy D Suter

Narasimhan Sundaram

Steven Wong

Roger G Gaughan

Methods are provided for qualifying jet fuel fractions that are derived at least in part from pre-refined crude oil sources. The methods allow for determination of the stability of a jet fuel product over time by using an accelerated aging test. The methods are beneficial for verifying the stability of a jet fuel fraction that includes a portion derived from a pre-refined crude oil.

Characterization of pre-refined crude distillate fractions

The mercury in crude oils is managed during the refining process to reduce its occurrence in refined petroleum products as well as in refinery emissions and wastes by converting the mercury, which may typically be present in the crude in elemental, ionic or combined organic (organomercury) forms, by operating the refinery on a blend of crudes comprising a mercury-containing crude of low sulfur content and a high sulfur crude. For optimal mercury control, the refinery should be operated in a high conversion regime, preferably with hydroprocessing (severe hydrotreating, hydrocracking) suitable for converting refractory, non-reactive sulfur compounds in the high sulfur crudes to more reactive forms including, for example, hydrogen sulfide, which will combine with the mercury present from the mercury-containing crude to form solid mercury sulfides which may be removed as solid waste by-products and disposed of in an environmentally acceptable manner.

Petroleum refinery mercury control

Partition coefficients for solutes in solvent-water systems are estimated based on corresponding values for the octanol-water system. The estimation of the partition coefficient includes correction factors based on the nature of the solute and the solvent. Petroleum fractions are an example of a suitable solvent for which a partition coefficient can be estimated, although other types of solvents can be used in developing a model for use in the estimation.

Assessment of solute partitioning in crude oils

A method for the reduction of corrosion in a treatment unit acid used for separating hydrogen sulfide from and acid gas stream using an alkaline absorption solution. Ions comprising the Sand/or HSions formed by the absorption of the hydrogen sulfide in the absorbent solution are subjected to in situ electrochemical oxidization to form polysulfide ions which form a protective coating on the surfaces of the unit.

Corrosion control in acid gas removal equipment by the situ generation of polysulfide ions

Methods and systems are provided for the in situ generation of polysulfide ions in a process stream including Sand/or HSions. Methods and systems are also provided to ameliorate corrosion in a process stream containing an acid gas or a scrubbing agent solvent, and abate mercury and cyanide in process streams containing a scrubbing agent solvent.

In situ generation of polysulfide ions using elemental sulfur for improved corrosion control, cyanide management, mercury management, arsine management and performance and reliability of acid gas removal equipment

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Centreville, VA, United States of America

Bryan M Knickerbocker