US 12,292,431 B2
Method of characterizing organic hydrocarbon compounds contained in a solid deposit of a geothermal plant
Maria-Fernanda Romero-Sarmiento, Rueil-Malmaison (FR); and Herman Ravelojaona, Rueil-Malmaison (FR)
Assigned to IFP ENERGIES NOUVELLES, Rueil-Malmaison (FR)
Appl. No. 17/762,764
Filed by IFP Energies nouvelles, Rueil-Malmaison (FR)
PCT Filed Sep. 10, 2020, PCT No. PCT/EP2020/075403
§ 371(c)(1), (2) Date Mar. 23, 2022,
PCT Pub. No. WO2021/058299, PCT Pub. Date Apr. 1, 2021.
Claims priority of application No. 1910696 (FR), filed on Sep. 27, 2019.
Prior Publication US 2022/0412945 A1, Dec. 29, 2022
Int. Cl. G01N 33/24 (2006.01); G01N 5/04 (2006.01)
CPC G01N 33/241 (2013.01) [G01N 5/04 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A method of characterizing organic hydrocarbon compounds contained in a solid deposit of a geothermal plant, characterized in that at least the following steps are applied to a sample of the deposit:
A) heating at least the sample in an inert atmosphere according to a temperature sequence and continuously measuring at least one representative quantity of the organic hydrocarbon compounds released during at least the temperature sequence, the temperature sequence being such that:
a) from a first temperature value ranging between 50° C. and 120° C., the temperature of the sample is raised according to a first temperature gradient ranging between 1° C./min and 50° C./min up to a second temperature value ranging between 180° C. and 220° C., and the sample is maintained at the second temperature value for a first predetermined time,
b) from the second temperature value, the temperature of the sample is raised according to a second temperature gradient ranging between 1° C./min and 50° C./min up to a third temperature value ranging between 330° C. and 370° C., and the sample is maintained at the third temperature value for a second predetermined time,
c) from the third temperature value, the temperature of the sample is raised according to a third temperature gradient ranging between 1° C./min and 50° C./min up to a fourth temperature value ranging between 630° C. and 670° C.,
B) characterizing the organic hydrocarbon compounds contained in the solid deposit of the geothermal plant from at least one curve of the measurement of the representative quantity of the organic hydrocarbon compounds released by the solid deposit sample during the temperature sequence by comparing the measurement curve of the representative quantity of said organic hydrocarbon compounds released by the solid deposit sample during the temperature sequence with at least one reference curve determined for a chemical used in the geothermal plant.