High temperature simulated distillation
AssigneeExxonMobile Research and Engineering Company
InventorsFrank P. DiSanzo, Howard J. Freund, Edward A. Moy
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Abstract
Systems and methods for determining a boiling point distribution of a sample include controlling the rates of temperature increase for a column and an injection port. An analyzer includes a column having a column heating element and an injection port having an injection port heating element. The temperature of the column can be increased at a first rate, and a temperature of the injection port can be increased at a second rate. The first and second rates are selected such that the temperature of the injection port is within about five to fifteen degrees Celsius of the temperature of the column when the temperature of the injection port reaches a target temperature of minimal thermal decomposition.
Claims20
A method for determining a boiling point distribution of a sample, the method comprising:
- providing an analyzer comprising:
- a column comprising a column heating element;
- and
- an injection port coupled to the column, the injection port comprising an injection port heating element;
- introducing a sample into the injection port;
- raising a temperature of the column at a first rate using the column heating element;
- raising a temperature of the injection port at a second rate using the injection port heating element,
- wherein the first rate and the second rate are selected such that the temperature of the injection port is within about fifteen degrees Celsius of the temperature of the column when the temperature of the column reaches a target temperature;
- eluting the sample in the column into components;
- and
- measuring a boiling point distribution of the sample,
- wherein measuring the boiling point distribution includes defining a cutoff temperature, using a detector to provide quantitative measurements of the components eluted in the column, and selecting a first set of data of quantitative measurements associated with temperatures lower than the cutoff temperature to measure the boiling point distribution of the sample.
Dependencies are inferred from the claim text.