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:
The invention concerns a mixed electronic and O2− anion conductive perovskite material, of formula (I): A(a)(1-x-u)A′(a−1)xA″(a″)uB(b)(1-s-y-v)B(b+1)sB′(b+β)yB″(b″)vO3-d, wherein: a, a−1, a″, b, b+1, b+β et b″ are integers representing respective valences of the atoms A, A′, A″, B, B′, B″; a, a″, b, b″, β, x, y, s, u, v et δ such that the electrical neutrality of the crystal lattice is preserved; A represents an atom selected among scandium, yttrium or in the families of lanthanides, actinides or alkaline-earth metals; A″ represents an atom selected among Al, Ga, In, or Tl; B, B′, B″ represents an atom selected among the transition metals, Al, In, Ga, Ge, Sb, Bi, Sn or Pb. The invention also concerns the method for preparing said material and its use as mixed conductive material of a catalytic membrane reactor, for use in synthesizing synthetic gas by oxidation of methane or natural gas.
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.
摘要翻译:一种复合材料(M),其包含:至少75体积%的混合电子导体化合物氧阴离子O 2(C1),其选自掺杂的陶瓷化合物,其在使用温度下以 具有离子氧化物晶格空位的晶体网络,更具体地,呈立方相,萤石相,钙钛矿相,褐铁矿相或烧绿石相的形式; 和不同于化合物(C1)的化合物(C 2 H 2)的0.01体积%〜25体积%,选自氧化物型陶瓷材料,非氧化物型陶瓷材料,金属,金属合金 或所述不同类型材料的混合物; 和由以下等式表示的至少一种化学反应产生的化合物(C 3 S 3)的0%-2.5体积%,其中FC1,FC2和FC3表示 化合物(C1),(C2H2)和(C3-C3)的原始化学式,x,y和z表示高于或等于0的有理数。本发明还 涉及一种用于制备和用作用于通过甲烷或天然气的催化氧化和/或作为陶瓷膜的混合导体材料合成合成气体的膜催化反应器的混合导体材料的方法。
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:
Preparation of a supported tubular ceramic membrane composed of two coaxial layers along a axis (x), a first layer with a non-zero thickness es of a support material (S) and a second layer with a non-zero thickness eM of an active material (M), characterised in that it comprises the following steps in sequence: a step (a) to shape said supported membrane by simultaneous coaxial co-extrusion of a paste PS of the support material (S) at a flow velocity along the axis (x) VS and a paste PM of active material (M) with a flow velocity along the axis (x) VM, where VS=VM; a step (b) to dry the co-extrudate formed in step (a); a step (c) to debind the co-extrudate dried in step (b), and a step (d) to apply a heat treatment to co-sinter the two coaxial layers of the product obtained in step (c); Device for implementation of step (a).
摘要翻译:制备由轴(x)两个同轴层组成的支撑管状陶瓷膜,具有非零厚度的支承材料(S)的第一层和非零厚度的第二层 M的活性物质(M),其特征在于,其顺序包括以下步骤:步骤(a)通过同时同时共挤出糊状物来形成所述负载膜, 沿着轴线(x)V S S的流速和活性材料(M)的浆料P M M的流速(S)的支撑材料(S) 沿着轴线(x)V M M,其中V S = V M; 步骤(b)干燥步骤(a)中形成的共挤出物; 剥离步骤(b)中干燥的共挤出物的步骤(c)和步骤(d),以进行热处理以共烧烧步骤(c)中获得的产物的两个同轴层; 用于实施步骤(a)的装置。
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 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:
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 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.