Abstract: Enzyme compositions including at least a) a cocktail of cellulases from Trichoderma reesei, and b) an enzymatic cocktail from Pycnoporus cinnabarinus including a cellobiose dehydrogenase (CDH) or c) a recombinant cellobiose dehydrogenase (CDH) from Pycnoporus cinnabarinus, preferably also including a Family 61 glycoside hydrolase. Also, methods for degrading a lignocellulosic biomass, for producing a fermentation product, for producing gluconic acid, xylonic acid and/or xylobionic acid, for enhancing the production of gluconic acid, xylonic acid and/or xylobionic acid or for increasing the yield of sugars from a lignocellulosic biomass.

Abstract: Provided is a process of enhanced oil recovery from an oil reservoir of an underground formation by using a compound of formula (I) to inhibit the phenomena of retention of anionic surfactants within an oil-bearing reservoir, such as a carbonate or clay reservoir: R—O—(—CH2—CH(—CH3)—O—)m—(—CH2—CH2—O—)n—H, wherein: R is a hydrocarbon-based group comprising from 6 to 40 carbons; m ranges from 0 to 20; n is greater than m and ranges from 5 to 40.

Abstract: The present invention relates to aggregate zeolitic adsorbents based on zeolite X and zeolite LSX. These adsorbents are particularly suitable for separating C8 aromatic isomers and in particular xylenes, separating sugars, separating polyhydric alcohols, separating isomers of substituted toluenes, separating cresols, separating dichlorobenzenes.

Abstract: Enzyme compositions including at least a) a cocktail of cellulases from Trichoderma reesei, and b) an enzymatic cocktail from Pycnoporus cinnabarinus including a cellobiose dehydrogenase (CDH) or c) a recombinant cellobiose dehydrogenase (CDH) from Pycnoporus cinnabarinus, preferably also including a Family 61 glycoside hydrolase. Also, methods for degrading a lignocellulosic biomass, for producing a fermentation product, for producing gluconic acid, xylonic acid and/or xylobionic acid, for enhancing the production of gluconic acid, xylonic acid and/or xylobionic acid or for increasing the yield of sugars from a lignocellulosic biomass.

Abstract: Method of evaluating the biodegradation, through the action of a bacterial population, of hydrocarbons trapped in a geologic structure. The mass of hydrocarbons present in said structure is determined without taking account of the biodegradation, from data relative to the physical and geometrical characteristics of the structure studied. Then the mass of hydrocarbons consumed by biodegradation is calculated after evaluating the number of bacteria, their hydrocarbon consumption and the structure filling time. The mass percentage of oil disappeared through the bacterial action is deduced from these two masses. Application: determination of the composition of oils in a reservoir and notably location of heavy oils. The method can notably be applied to the evaluation of the economic risk linked with the presence of biodegraded petroleum reservoirs.

Abstract: The invention relates to aggregate zeolitic adsorbents based on faujasite X type zeolite powder having a low silica content and small crystals, exchanged with barium or based on faujasite X type zeolite having a low silica content and small crystals, exchanged with barium and potassium. The invention also relates to the method for preparing said aggregate zeolitic adsorbents, and also their uses for separating sugars, polyhydric alcohols, isomers of substituted toluene, cresols, or for recovering very high purity paraxylene.

Abstract: A logging probe supporting device includes a connector that can be plugged in at the bottom of the well with a logging cable contained in the inner space of rods to which the supporting device is fastened and fluid communicating openings provided between the inner space of the rods and the outside of the supporting device, the openings being arranged between the probe and connector. The device includes, between the openings and the connector, a shutoff such as check valves allowing fluid circulation from the inside towards the outside and preventing circulation from the outside towards the inside of the supporting device.

Abstract: A method for detecting abnormal combustion in the combustion chamber of at least one cylinder of a spark-ignition supercharged internal-combustion engine includes: measuring a quantity linked with the combustion of the fuel mixture in the chamber, producing a signal whose amplitude depends on the amplitude of the measured quantity, comparing the amplitude of the signal produced with the amplitude of a threshold signal corresponding to the amplitude of a signal during combustion with engine knock, determining the presence of a rumble type abnormal combustion in the combustion chamber when the amplitude of the signal produced exceeds the amplitude of the threshold signal by a significant value.

Abstract: A method of deacidizing a gaseous effluent comprising acid compounds where the gaseous effluent is contacted in C1 with an adsorbent solution so as to obtain a gaseous effluent depleted in acid compounds and an absorbent solution laden with acid compounds, the absorbent solution being selected for its property of forming two separable phases when it has absorbed an amount of acid compounds and when it is heated. The absorbent solution laden with acid compounds is then heated in E1 and E3 so as to separate two fractions: a first absorbent solution fraction depleted in acid compounds and a second absorbent solution fraction enriched in acid compounds. These two fractions are then separated in BS1. The second fraction is regenerated in C2 so as to release part of the acid compounds, and the first absorbent solution fraction and the regenerated absorbent solution are recycled as absorbent solution.

Abstract: The present invention relates to a well drilling, completion or workover fluid wherein the continuous phase of the fluid essentially consists of a liquid fluorinated compound. In a variant, the liquid fluorinated compound is a perfluorinated compound.

Abstract: A circuit for feeding at least one fluid to an internal-combustion engine, notably of Diesel type, includes a circuit (20) for supercharging air to the engine intake, including a supercharging pipe (36), a supercharging device (28) with a compression stage (26) and a compressed air cooling radiator (38), as well as a circuit (22) for recirculating the exhaust gas to the engine intake, including an exhaust gas recirculation pipe (40) and an exhaust gas cooler (46). The feed circuit includes a connecting pipe (50) allowing to connect, upstream from cooler (46), air supercharging circuit (20) and exhaust gas recirculation circuit (22).

Abstract: Rotodynamic machine for compressing a multiphase fluid comprising at least one gas phase and one liquid phase. The machine comprises at least one mobile wheel 6 rotating around an axis A-A?, mounted in a housing 1, and at least one fixed wheel 7 secured to housing 1. Mobile wheel 6 comprises a hub fitted with at least two blades 20 so as to form at least two channels delimited by hub 8, housing 1 and two of said blades 20. The channels have a centrifugal part. The length of one of the channels defined as the ratio of the volume of a channel to the maximum orthoradial area of said channel, measured in a plane perpendicular to the axis of rotation, ranges between 10 cm and 20 cm, and the ratio of the area of the largest orthoradial channel cross-section to the area of the smallest orthoradial channel cross-section is less than or equal to 3.

Abstract: The present invention relates to a method of deacidizing a gaseous effluent, wherein the following stages are carried out: a) contacting the gaseous effluent with an absorbent solution so as to obtain a gaseous effluent depleted in acid compounds and an absorbent solution laden with acid compounds, the absorbent solution being selected for its property to form two separable phases when it absorbs an amount of acid compounds, b) separating the absorbent solution laden with acid compounds into two fractions: a first absorbent solution fraction depleted in acid compounds and a second absorbent solution fraction enriched in acid compounds, c) regenerating the second fraction so as to release part of the acid compounds, d) mixing a predetermined amount of water with the first absorbent solution fraction obtained in stage b) or with the regenerated absorbent solution fraction obtained in stage c), then e) recycling the first absorbent solution fraction and the regenerated absorbent solution as the absorbent solu

Abstract: Modular reactor for exothermic/endothermic chemical reactions which take place in three-phase systems, comprising a series of modules, superimposed with respect to each other, fixed to each other by means of coupling flanges, each module consisting of an external cylindrical body and a series of tube bundles, for the circulation of a thermal-exchange fluid, positioned inside said body.

Abstract: The present invention relates to a method of controlling the intake of an internal-combustion engine comprising at least two groups (12, 14) of at least one cylinder (C1-C4) wherein a feed is admitted for operation of said engine, and an exhaust line (40, 94, 100) comprising at least one exhaust gas depollution means (42, 96, 102). According to the invention, the method consists, while the engine runs at low speeds and/or at low torques, in evaluating the total feed to be admitted into the cylinders to operate the engine, in admitting a greater proportion of the total feed into one (12) of the groups of cylinders (C1, C4) than in the other (14) group of cylinders (C2, C3) so as to achieve an exhaust gas temperature increase allowing to speed up the rise in temperature of depollution means (42, 96, 102).

Abstract: The invention relates to a method for separating constituents of a liquid feed by liquid-liquid centrifugal chromatography and to a device for implementing it. Constituents (A, B) having different partition coefficients such that they are respectively carried along at unequal velocities by a light solvent (l) and a heavier solvent (L), the feed is continuously injected at an intermediate point of a separation column (col), successive cycles comprising alternately a heavy solvent injection stage and a light solvent injection stage are carried out respectively at the two ends of the column consisting of the interconnection in series of at least one set of separation cells, and the separated solvents (FA, FB) are collected during each one of said stages at the column ends opposite the solvent injection points.

Abstract: Device for measuring physical characteristics of a porous sample by performing successive drainage and imbibition phases in the presence of a first electricity-conducting fluid and of a second fluid of lower density than the first fluid, by means of a centrifuge whose speed is successively increasing and decreasing. The sample saturated with the first fluid is placed in a vessel (13) fastened to the end of an arm (9) driven in rotation by a motor (10) and communicating, by means of a rotating electro-hydraulic connector (17), with a stationary measuring signal control and acquisition unit (E) including hydraulic fluid displacement means and an acquisition device connected to a capacitive sonde in the vessel, which delivers signals indicative of the position of the interface between the two fluids. The device can be applied for analyzing rocks taken from an underground reservoir for example.

Abstract: The present invention relates to a method for determining the kinetics of gas hydrate formation in a fluid comprising water, wherein the following stages are carried out: a sample of the fluid is provided in form of a water-in-oil stable emulsion, DSC measurements are performed on the sample to obtain at least one peak corresponding to the gas hydrate conversion energy in the water drops of said emulsion, kinetic characteristics of the formation of hydrates in said fluid are deduced from the peak.

Abstract: The invention relates to a riser pipe section comprising a main tube (2), at least one auxiliary line element (3) arranged substantially parallel to said tube (2), characterized in that the ends of main tube (2) comprise connecting means (8) allowing longitudinal stresses to be transmitted and in that the ends of auxiliary line element (3) comprise linking means (5-6) allowing longitudinal stresses to be transmitted.

Abstract: A method and device is disclosed for evaluating simultaneously, and with the same equipment, the electric resistivity and flow parameters of a porous medium, from experimental measurements obtained from at least one multi-flow type displacement experiment which has application in oil reservoir development. The method continuously measures as a function of time the differential pressure between two ends of a sample, the electric resistivity of the sample and, for each stabilization step, at least two values of a displaced fluid production volume are also measured. A continuous curve of the displaced fluid production volume, from which flow parameters are estimated by means of a numerical flow simulator, is then deduced therefrom.