METHOD FOR CONTINUOUSLY MONITORING THE DEGREE OF PROGRESS OF OXIDATION OF A FUEL

• US 20180143175A1
• Filed: 05/04/2016
• Published: 05/24/2018
• Est. Priority Date: 05/05/2015
• Status: Active Grant

• Current Assignee: IFP Energies Nouvelles
• Original Assignee: IFP Energies Nouvelles
• Inventors: ALVES FORTUNATO PIRES FRANCO, Maira, BEN AMARA, Arij, JEULAND, Nicolas, STARCK, Laurie
• Granted Patent: US 10,564,141 B2
• Time in Patent Office: Days
• CPC Class Codes: G01N 2030/025 Gas chromatography
• CPC Class Codes: G01N 21/3504 for analysing gases, e.g. multi-gas analysis
• CPC Class Codes: G01N 27/026 Dielectric impedance spectroscopy electrochemical impedance spectroscopy for measuring corrosion G01N17/02
• CPC Class Codes: G01N 33/225 Gaseous fuels, e.g. natural gas
• CPC Class Codes: G01N 33/28 Oils , i.e. hydrocarbon liquidsgaseous fuels G01N33/225; edible oils or edible fats G01N33/03
• CPC Class Codes: G01N 33/2805 investigating the resistance to heat or oxidation to the weather, to corrosion, or to light G01N17/00
• CPC Class Codes: G01N 33/2829 mixtures of fuels, e.g. determining the RON-number
• CPC Class Codes: G01N 33/2835 specific substances contained in the oil or fuel

Abstract

The present invention relates to a method for continuously monitoring the degree of progress of oxidation of a fuel, comprising at least the following steps:

• • determining at least one indicator for the progress of the oxidation reaction to be monitored,
  • measuring the content of said indicator for the progress of the oxidation reaction in said fuel,
  • classifying the degree of progress of oxidation of said fuel,
  • determining the measures to be taken as a function of said classification.

Claims

1. A method for continuously monitoring the degree of progress of oxidation of a fuel,

comprising at least the following steps:

a) determining at least one indicator for the progress of the oxidation 5 reaction to be monitored,

b) measuring the content of the indicator for the progress of the oxidation reaction in the fuel,

c) classifying the degree of progress of oxidation of the fuel,

d) determining the measures to be taken as a function of the classification,

wherein the progress indicator is at least one intermediate or final product or at least one co-product of at least one of the oxidation reactions with one or more components of the fuel,

and in that the classification is carried out by comparison between the measured contents of the progress indicator and the contents of the progress indicator present in the fuel after a period of accelerated oxidation, measured in accordance with the method EN 15751, in order to determine the induction period (IP) for the fuel, the degree of progress of oxidation then being;

initial if the measured contents correspond to an oxidation period (P1) strictly less than 0.5 IP (0 IP≤

P1<

0.5 IP),

intermediate if the measured contents correspond to an oxidation period (P2) of greater than or equal to 0.5 IP and strictly less than 1 IP (0.5 IP≤

P2<

IP),

advanced if the measured contents correspond to an oxidation period (P3) of 1 IP or higher (1 IP≤

P3).

2. The method as claimed in claim 1, wherein the fuel is selected from kerosene, gas oil and gasoline.

3. The method as claimed in claim 1, wherein the progress indicator is one or more molecules belonging to families selected from aldehydes, alcohols, ketones, ketoacids, epoxides and carboxylic acids.

4. The method as claimed in claim 1, where the progress indicator is a specific molecule selected from the families of the aldehydes, alcohols, ketones, ketoacids, epoxides and carboxylic acids.

5. The method as claimed in claim 1, wherein the progress indicator is a specific molecule selected from formaldehyde and acetaldehyde.

6. The method as claimed in claim 1, wherein the progress indicator is ethylene oxide.

7. The method as claimed in claim 1, wherein the progress indicator is at least one co-product, the co-products being one or more polymerized molecules obtained from one or more monomers belonging to the families of the linear or branched alkenes, aromatics, aldehydes, alcohols, ketones, ketoacids, epoxides and carboxylic acids.

8. The method as claimed in claim 7, wherein the monomer belonging to the aldehydes family is selected from formaldehyde and acetaldehyde.

9. The method as claimed in claim 7, wherein the monomer belongs to the family of epoxides.

10. The method as claimed in claim 1, wherein the measurement of the concentration of at least one progress indicator is carried out by means of at least one UV, IR, GC, MS, SAXS or tonometric analysis.

11. The method as claimed in claim 1, wherein the fuel is in the on-board storage phase.

12. The method as claimed in claim 1, wherein the fuel is in the logistical phase.

13. The method as claimed in claim 1, wherein when the fuel is in the initial oxidation phase, the actions to be taken are corrective actions such as adding an anti-oxidizing additive, or preventative such as eliminating pro-oxidizing sources.

14. The method as claimed in claim 1, wherein when the fuel is in the intermediate oxidation phase, the actions to be taken are corrective actions such as adding fresh fuel in order to improve the quality of the product.

15. The method as claimed in claim 1, wherein when the fuel is in the advanced oxidation phase, one action to be taken is to warn the user of the distinct risk of using the fuel.