Abstract:
The invention relates to a chemical looping combustion device which uses a solid fuel that generates particles of unburned residues and which employs oxygen-carrying particles, such as metal oxides. The device comprises at least one combustion zone and a separator for separating the particles contained in a gaseous mixture originating from the combustion zone. The separator comprises at least one enclosure (1) including an intake passage (4) for the mixture, a discharge passage (5) located in the lower part of the enclosure and an outlet passage (6) located in the upper part of the device, the intake and discharge/outlet parameters being selected in order to create a dense phase in the lower part of the enclosure and a diluted phase in the upper part thereof. The invention also relates to a combustion method using the device of the invention.
Abstract:
The subject of the invention is a chemical looping combustion process for combusting a solid feedstock, in which loop an oxygen-carrying material flows, said process comprising at least: bringing the solid feedstock particles into contact with metal-oxide particles in a first reaction zone (R1) operating as a dense-fluidized bed; combusting the exhaust gases obtained from the first reaction zone (R1) in the presence of metal-oxide particles in a second reaction zone (R2); separating from a mixture obtained from the second zone (R2), in a separation zone (S3), the gas, the unburnt particles and the metal-oxide particles; and reoxidizing the metal-oxide particles in an oxidation zone (R4) before returning them to the first zone (R1).
Abstract:
The invention relates to a method for producing synthetic gas in at least one chemical loop, which is self-sufficient in terms of energy. The chemical loop includes at least three separate reaction areas for oxidation, reduction, and gasification: 1. at least one oxidation reaction area R1 supplied with air, referred to as an air reactor, in which the oxidation reaction of metal oxides after reduction is carried out; 2. at least one reduction by combustion reaction area R2, referred to as a fuel oil reactor, in which the combustion reaction of the charges in the presence of the oxygen present in the metal oxides is carried out; 3. at least one gasification reaction area R3, referred to as a gasification reactor, for the solid and/or liquid feedstock for producing a synthesis gas, said gasification being catalysed by the at least partially reduced metal oxides from R2.
Abstract:
The invention relates to an improved installation and an improved method for the chemical looping combustion of at least one hydrocarbonated load with independent control of the circulation of solid particles of an active mass between the reactional areas in a fluidised bed, by means of at least one non-mechanical valve, such as an L-valve.
Abstract:
The invention relates to a method for the chemical looping combustion of a solid hydrocarbon feedstock, in which: particles of oxygen-carrying material originating from a reduction zone (RO) are brought into contact with a flow of oxidising gas in a reactive oxidation zone (R1); and the fly ash, the fines and the particles of oxygen carrying material in the mixture originating from zone R1 are separated in a diluted-phase separation zone (S2), the driving force required for diluted-phase elutriation in S2 being provided by the flow of oxidising gas from the reactive oxidation zone (R1). Optionally, enhanced separation is performed in a dust removal zone (S4) and, optionally, subsequently in a dense-phase elutriation separation zone (S5). The invention also relates to a chemical looping combustion facility that can be used to perform the aforementioned method.
Abstract:
The invention relates to a device and an improved method for the chemical loop combustion of at least one liquid hydrocarbon feedstock, said method comprising: mixing the liquid feedstock with an atomisation gas for feeding the same into a metal oxide transport area (2) upstream from the combustion area (3) and through an atomisation means (6) so as to form finely dispersed liquid droplets in the atomisation gas; spraying the liquid feedstock in the form of droplets into contact with at least one portion of the metal oxides in the transport area (2), the operational conditions in the transport area (2) being selected so that the superficial speed of the gas after spraying the liquid feedstock is higher than the transport speed of the metal oxide particles; and feeding the entirety of the effluents from the transport area (2) towards a combustion area (3) for reducing the metal oxides, said combustion area (3) including at least one dense-phase fluidised bed. The invention can advantageously be used for capturing CO2 and for generating power.
Abstract:
The invention concerns a method for separating at least one catalyst from a mixture of catalysts homogeneous in shape, the catalysts comprising at least one metal chosen from the group formed by Ni, Co, Mo, W, the catalyst to be separated comprising a characteristic metal chosen from the group formed by Ni, Co, Mo, W and the other catalysts of the mixture not containing said characteristic metal, method in which - the catalyst grains of said mixture move past the LIBS (Laser Induced Breakdown Spectrometry) detection system • - the presence of said characteristic metal in the catalysts is detected by the LIBS technique, the wavelength being chosen to detect said characteristic metal • - the LIBS detection system sends a signal to a means for discharging the grains of the catalyst to be separated so as to separate said grains from the other catalysts of said mixture. The invention also concerns the associated device.
Abstract:
L'invention concerne un procédé de séparation d'au moins un catalyseur d'un mélange de catalyseurs de forme homogène, les catalyseurs comprenant au moins un métal choisi dans le groupe formé par Ni, Co, Mo, W, le catalyseur à séparer comprenant un métal caractéristique choisi dans le groupe formé par Ni, Co, Mo, W et les autres catalyseurs du mélange ne contenant pas ledit métal caractéristique, procédé dans lequel -les grains de catalyseurs dudit mélange passent devant le système de détection LIBS -la présence dudit métal caractéristique dans les catalyseurs est détectée par la technique LIBS, la longueur d'onde étant choisie pour détecter ledit métal caractéristique -le système de détection LIBS envoie un signal vers un moyen d'évacuation des grains du catalyseur à séparer de façon à séparer lesdits grains des autres catalyseurs dudit mélange.