摘要:
An electrochemical device for separating oxygen from an oxygen-containing gas comprises a plurality of planar ion-conductive solid electrolyte plates and electrically-conductive gas-impermeable interconnects assembled in a multi-cell stack. Electrically-conductive anode and cathode material is applied to opposite sides of each electrolyte plate. A gas-tight anode seal is bonded between the anode side of each electrolyte plate and the anode side of the adjacent interconnect. A regulating electrode, applied to the anode side of each electrolyte plate between the anode seal and the edge of the anode, eliminates anode seal failure by maintaining the 24-hour anode seal power density below about 1.5 .mu.W/cm.sup.2. A gas-tight seal is applied between the cathode sides of each electrolyte plate and the adjacent interconnect such that the anode and cathode seals are radially offset on opposite sides of the plate. The combination of regulating electrodes and offset seals is particularly effective in eliminating anode seal failure.
摘要翻译:用于从含氧气体中分离氧的电化学装置包括多个平面离子导电固体电解质板和组装在多电池堆中的导电气体不可渗透互连。 将导电阳极和阴极材料施加到每个电解质板的相对侧。 在每个电解质板的阳极侧和相邻互连件的阳极侧之间结合气密阳极密封。 施加到阳极密封件和阳极边缘之间的每个电解质板的阳极侧的调节电极通过将24小时的阳极密封功率密度维持在约1.5μW/ cm 2以下来消除阳极密封故障。 在每个电解质板的阴极侧和相邻的互连件之间施加气密密封,使得阳极和阴极密封件在板的相对侧上径向偏移。 调节电极和偏移密封的组合在消除阳极密封故障方面特别有效。
摘要:
The present invention is a method for manufacturing inorganic membranes which are capable of separating oxygen from oxygen-containing gaseous mixtures. The membranes comprise a porous composite of a thin layer of a multicomponent metallic oxide which has been deposited onto a porous support wherein the pores of the multicomponent metallic oxide layer are subsequently filled or plugged with a metallic-based species. The inorganic membranes are formed by depositing a porous multicomponent metallic oxide layer onto the porous support to form a porous composite having a network of pores capable of transporting gases. The network of pores are plugged or filled by organometallic vapor infiltration to form an inorganic membrane having essentially no through porosity.
摘要:
Planar solid-state membrane modules for separating oxygen from an oxygen-containing gaseous mixture which provide improved pneumatic and structural integrity and ease of manifolding. The modules are formed from a plurality of planar membrane units, each membrane unit which comprises a channel-free porous support having connected through porosity which is in contact with a contiguous dense mixed conducting oxide layer having no connected through porosity. The dense mixed conducting oxide layer is placed in flow communication with the oxygen-containing gaseous mixture to be separated and the channel-free porous support of each membrane unit is placed in flow communication with one or more manifolds or conduits for discharging oxygen which has been separated from the oxygen-containing gaseous mixture by permeation through the dense mixed conducting oxide layer of each membrane unit and passage into the manifolds or conduits via the channel-free porous support of each membrane unit.
摘要:
This invention presents a new class of multicomponent metallic oxides which are particularly suited toward use in fabricating components used in processes for producing syngas. The non-stoichiometric, A-site rich compositions of the present invention are represented by the formula (LnxCa1−x)y FeO3−&dgr;wherein Ln is La or a mixture of lanthanides comprising La, and wherein 1.0>x>0.5, 1.1≧y>1.0 and &dgr; is a number which renders the composition of matter charge neutral. Solid-state membranes formed from these compositions provide a favorable balance of oxygen permeance and resistance to degradation when employed in processes for producing syngas. This invention also presents a process for making syngas which utilizes such membranes.
摘要:
The present invention presents a new class of multicomponent metallic oxides which are particularly suited toward use in fabricating component used in solid-state oxygen separation devices. The compositions of the present invention are represented by the formula Ln.sub.x A'.sub.x ' Co.sub.y Fe.sub.y' Cu.sub.y" O.sub.3-z wherein Ln is an element selected from the f block lanthanides as represented by the IUPAC periodic table of the elements, A' is selected from strontium or calcium, x>0, y>0, y'>0, x +x'=1, y +y'+y"=1, 0.ltoreq.y"
摘要:
An electrochemical device is disclosed comprising a plurality of planar electrolytic cells connected in series, each cell having an oxygen ion-conducting electrolyte layer, an anode layer and a cathode layer associated with the electrolyte layer, electrically conductive interconnect layers having gas passages situated therein for transporting gaseous streams, which interconnect layers electrically connect the anode layer of each electrolytic cell to the cathode layer of an adjacent planar cell, and sealing means positioned between the interconnect layers and the electrolytic cells to provide a gas-tight seal therebetween. The configuration of the interconnect layer and the placement of the seal means provides a separation between the seal and the conductive pathway of electrons between the anode layer and cathode layer which prevents corrosion or deterioration of the seal.
摘要:
Natural gas or other methane-containing feed gas is converted to a C.sub.5 -C.sub.19 hydrocarbon liquid in an integrated system comprising an oxygenative synthesis gas generator, a non-oxygenative synthesis gas generator, and a hydrocarbon synthesis process such as the Fischer-Tropsch process. The oxygenative synthesis gas generator is a mixed conducting membrane reactor system and the non-oxygenative synthesis gas generator is preferably a heat exchange reformer wherein heat is provided by hot synthesis gas product from the mixed conducting membrane reactor system. Offgas and water from the Fischer-Tropsch process can be recycled to the synthesis gas generation system individually or in combination.
摘要:
The present invention presents a fluid separation device capable of separating oxygen from an oxygen-containing gaseous mixture which utilizes at least one solid-state membrane comprising a dense mixed conducting multicomponent metallic oxide layer formed from a mixed conducting multicomponent metallic oxide represented by the formulaLn.sub.x A'.sub.x A".sub.x B.sub.y B'.sub.y O.sub.3-z,wherein Ln is an element selected from the f block lanthanides, A' is selected from Group 2, A" is selected from Groups 1, 2 and 3 and the f block lanthanides, and B,B' are independently selected from the d block transition metals, excluding titanium and chromium, wherein 0.ltoreq.x y+y'>1.0 and z is a number which renders the compound charge neutral. The subject mixed conducting multicomponent metallic oxides demonstrate improved resistance to degradation by carbon dioxide and sulfur dioxide and improved oxygen flux and reduced creep rates at operating temperature.
摘要翻译:本发明提供了一种能够从含氧气体混合物中分离出氧气的流体分离装置,其利用至少一个固态膜,该固体膜包括由式LnxA表示的混合导电多组分金属氧化物形成的致密混合导电多组分金属氧化物层 其中Ln是选自f嵌段镧系元素的元素,A'选自组2,A“选自组1,2和3,并且f嵌段镧系元素和B ,B'独立地选自除了钛和铬之外的d嵌段过渡金属,其中0 y + y'> 1.0,z是使化合物电荷中性的数字。 本发明的混合导电多组分金属氧化物表现出改善的抗二氧化碳和二氧化硫的降解性,并改善了氧气通量,降低了工作温度下的蠕变速率。
摘要:
The present invention presents a new class of multicomponent metallic oxides which are particularly suited toward use in fabricating components used in solid-state oxygen separation devices. The compositions of the present invention are represented by the formula Ln.sub.x A'.sub.x' A".sub.x" B.sub.y B'.sub.y' B".sub.y" O.sub.3-z, wherein Ln is an element selected from the f block lanthanides, A' is selected from Group 2, A" is selected from Groups 1, 2 and 3 and the f block lanthanides, and B,B',B" are independently selected from the d block transition metals, excluding titanium and chromium, wherein 0.ltoreq.x y+y'+y">1.0 and z is a number which renders the compound charge neutral wherein such elements are represented according to the Periodic Table of the Elements adopted by IUPAC. These compositions provide superior resistance to degradation when employed in such devices under process conditions of high carbon dioxide and water partial pressures.
摘要翻译:本发明提出了一种新型的多组分金属氧化物,其特别适用于制备用于固态氧分离装置的组分。 本发明的组合物由式LnxA'x'A'''''ByB'y'B''''O3-z表示,其中Ln是选自f嵌段镧系元素的元素,A'是 选自组2,A“选自组1,2和3,并且f嵌段镧系元素,B,B',B”独立地选自d嵌段过渡金属,不包括钛和铬,其中0 < / = x <1,0 y + y'+ y”> 1.0,z是使化合物电荷中性的数字,其中这些元素根据IUPAC采用的元素周期表表示。 当在高二氧化碳和水分压的工艺条件下用于这些装置时,这些组合物提供优异的抗降解性。