Process for predicting properties of multi-component fluid blends
First Claim
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1. A process for controlling the blending of a plurality of fluid components comprising in combination the steps of:
- a) measuring an absorbance at selected wavelengths in the infrared indicative of a property of each of said plurality of fluid components to be blended together;
b) outputting a signal indicative of each said absorbance for each of said components;
c) optionally converting said absorbance signal indicative of said property to a first or higher mathematical derivative signal;
d) weightedly adding substantially linearly the absorbance signals or the first powers of said derivative signals to provide a signal indicative of the blended value of said property after said components are blended together;
e) controlling the quantity of said plurality of fluid components in response to said signal indicative of said blended value.
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Abstract
The octane of components used in the blending of gasoline is used to predict the octane of the finished gasoline blend by measuring absorbances, preferably in the near-infrared range, and metering the fraction of each blending component as independent variables and performing a multiple regression on the data modeling the dependent variable of the various octanes. Percent aromatics in diesel fuel and other finished chemical or physical properties of the finished blend can be controlled by feed-forward and/or feed-back techniques.
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Citations
13 Claims
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1. A process for controlling the blending of a plurality of fluid components comprising in combination the steps of:
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a) measuring an absorbance at selected wavelengths in the infrared indicative of a property of each of said plurality of fluid components to be blended together; b) outputting a signal indicative of each said absorbance for each of said components; c) optionally converting said absorbance signal indicative of said property to a first or higher mathematical derivative signal; d) weightedly adding substantially linearly the absorbance signals or the first powers of said derivative signals to provide a signal indicative of the blended value of said property after said components are blended together; e) controlling the quantity of said plurality of fluid components in response to said signal indicative of said blended value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification