摘要:
Provided is a device for treating a food product in order to reduce or eliminate the detrimental effects of the presence of oxygen which is in contact with the external surface of the product. The device includes a vat provided with a hood, containing a food product whose free surface is in contact with the atmospheric air, a solid electrolyte membrane, each face of the membrane being connected to an electrode, each electrode being connected to a current generator, a heater for making the electrolyte operate at the desired working temperature, a pump for discharging oxygen extracted, by the solid electrolyte, from the atmospheric air present above the food product, in a pipe, a pump for circulating the atmosphere to be treated, an oxygen analyzer for measuring the oxygen level in the gas atmosphere above the food product, a control unit for modifying the operation of the solid electrolyte as a function of the oxygen level and the gas atmosphere to be treated and the recirculation rate of the atmosphere and, optionally, a cooling unit.
摘要:
A process is provided for treating food products in order to reduce or eliminate the detrimental effects of the presence of oxygen in the atmosphere which is in contact with the products and, more particularly, the external surface of the products. A non-zero quantity of oxygen is extracted from the atmosphere by implementing a solid electrolyte which is an O2− ion conductor and is essentially impermeable to the gases. The invention has applicability to preserving frying oil baths.
摘要:
A process for preparing a solid composite electrolyte comprising at least one compound of the BIMEVOX family is provided. The process comprises at least one step of preparing a mixture of one or more compounds of the BIMEVOX family with one or more chemically inert compounds, at least one step of compacting the mixture obtained, and at least one sintering step during which the temperature reached, over a nonzero time interval, has a value greater than the optimum sintering temperature for the compound of the BIMEVOX family.
摘要:
Process for separating oxygen from a gas mixture containing it employs a solid-electrolyte electrochemical cell, where the cell includes a homogeneous structure of one or more BIMEVOX derivatives, with dynamic electrodes created "in situ" that are reversible and self-adaptive, and at least two current collectors.
摘要:
The present invention relates to a container packing structure, characterized in that it comprises a crystalline phase containing 55 to 97% by weight of xonotlite crystallites and 3 to 45% by weight of tobermorite crystallites. It also relates to a method for fabricating such a packing structure, and the container containing same, and its use for storing fluids such as gases.
摘要:
Chemical combination (C) between an active solid phase which is covalently bound to the surface of an inert solid phase, characterized in that said solid active phase essentially consists in a solid solution of a mixture of at least a magnesium oxide type phase compound and at least a magnesium silicate type phase compound in which Al, and Rh and/or Ni cations are soluted and characterized in that said inert solid phase is either a compound represented by the general formula (I): AlaNibRhcMgdSieOf (I) wherein a, b, c, d, and e are integers which are greater than or equal to 0, f is an integer greater than 0, the sum a+b+c+d≠0, and wherein (3a+2b+3c+2d+4e)/2=f, or a mixture of compounds represented by the said general formula (I), provided that at least one of the Si, Al, Mg, Rh or Ni elements, which is present in the solid active phase, is also present in the solid inert phase. Use of a catalyst in chemical reactions involving the conversion of hydrocarbonaceous feedstocks.
摘要:
Chemical combination (C) between an active solid phase which is covalently bound to the surface of an inert solid phase, characterized in that said solid active phase essentially consists in a solid solution of a mixture of at least a magnesium oxide type phase compound and at least a magnesium silicate type phase compound in which Al, and Rh and/or Ni cations are soluted and characterized in that said inert solid phase is either a compound represented by the general formula (I): AlaNibRhcMgdSieOf (I) wherein a, b, c, d, and e are integers which are greater than or equal to 0, f is an integer greater than 0, the sum a+b+c+d≠0, and wherein (3a+2b+3c+2d+4e)/2=f, or a mixture of compounds represented by the said general formula (I), provided that at least one of the Si, Al, Mg, Rh or Ni elements, which is present in the solid active phase, is also present in the solid inert phase.Use of a catalyst in chemical reactions involving the conversion of hydrocarbonaceous feedstocks.
摘要:
A composite material (M) comprising: at least 75% by volume of a mixed electronic conductor compound oxygen anions O (C1) selected from doped ceramic compounds which, at the temperature of use, are present in the form of a crystalline network having ion oxide lattice vacancies and, more particularly, in the form of a cubic phase, a fluorite phase, a perovskite phase, of the aurivillius variety, a Brown-Millerite phase or a pyrochlore phase; and 0.01%-25% by volume of a compound (C2) which is different from compound (C1), selected from oxide-type ceramic materials, non-oxide type ceramic materials, metals, metal alloys or mixtures of said different types of material; and 0%-2.5% by volume of a compound (C3) produced from at least one chemical reaction represented by the equation: xFC1+yFC2 - - - >zFC3, wherein FC1, FC2 and FC3 represent the raw formulae of compounds (C1), (C2) and (C3) and x, y and z represent rational numbers above or equal to 0. The invention also relates to a method for the preparation and use thereof as mixed conductor material for a membrane catalytic reactor used to synthesize synthetic gas by catalytic oxidation of methane or natural gas and/or as mixed conductor material for a ceramic membrane.
摘要:
A composition and method for a Catalytic Partial Oxidation (CPO) of methane to synthesis gas. The catalyst allows the process to proceed at low residence time providing a long time thermal stability. The perovskite structure [AzA′1-z][B1-x-yNix Rhy] O3-δ of the catalyst is obtained using mainly La, Sr, as A and A′ cation sites (A, A′: actinide and/or lanthanide, elements and/or elements from Group I and II) and mainly Fe, Ni, as B cation sites (B: transition metal element and/or element from Group III to V).
摘要翻译:甲烷对合成气的催化部分氧化(CPO)的组成和方法。 催化剂允许该方法在低停留时间下进行,提供长时间的热稳定性。 钙钛矿结构[A 1 Z 1 -Z 1] - [B 1-xy N 2 N z N 2 使用主要为La,Sr作为A和A'阳离子位点(A,A':锕系元素和/或镧系元素,元素和/或镧系元素)获得催化剂的O 3-δ SUB> /或来自组I和II的元素)和主要是Fe,Ni,作为B阳离子位点(B:过渡金属元素和/或从III至V族的元素)。
摘要:
The invention concerns an oxide ion conductive ceramic membrane, characterized in that it comprises a non-null finite volume with non-null total thickness E, comprising a dense layer (CD) of a solid electrolyte, a so-called bonding layer (CA), of two porous electrodes (EP) and (EP′), two porous current collectors (CC) and (CC′), and at least at least a coating porous layer (ER), characterized in that the thickness E of the volume of said membrane, is equal to the sum of the thickness of each of said elements. The membrane is used for separating oxygen from air or from a gas mixture containing same.