Abstract: A method is disclosed for selectively separating carbon dioxide gas by contacting the carbon dioxide containing gas with a composition containing lithium zirconia at a temperature of 450.degree. C. or more so that carbon dioxide reacts with the lithium zirconia to produce lithium carbonate and zirconia. Subjecting the lithium carbonate and zirconia to a temperature of 600.degree. C. or more so as to produce lithium zirconia and carbon dioxide.

Abstract: A molten carbonate fuel cell comprises a fuel electrode, an oxidizing agent electrode, and an electrolyte body prepared by impregnating a porous body including a retaining material and a reinforcing material with an electrolyte containing an alkali carbonate. The retaining material consists essentially of .alpha.-lithium aluminate (.alpha.-LiAlO.sub.2) having at most 0.60.degree. of a half value width of (104) peak in an X-ray powder diffractometry.

Abstract: There is proposed a molten carbonate fuel cell of high performance and long life which is provided with an oxidizing gas side-collector plate having on its surface a non-stoichiometric composite oxide layer excellent in electric conductivity and corrosion resistance, and hardly attracting electrolyte.

Abstract: Disclosed is a molten carbonate fuel cell comprising an electrolyte body sandwiched between a pair of electrodes, outflow of an electrolyte from the electrolyte body being diminished to suppress an increase of the internal resistance and occurrence of a gas crossover, which accompany the outflow of the electrolyte, so as to increase the life time of the fuel cell. The molten carbonate fuel cell of the present invention comprises a pair of conductive electrodes, an electrolyte body sandwiched between the pair of electrodes and including a porous body containing a retaining material and a reinforcing material and an electrolyte impregnated in the porous body and containing an alkali carbonate mixture, the retaining material containing fine particles having an average particle diameter of 0.2 to 0.6 .mu.m and the reinforcing material containing short fibers having a diameter of 0.5 to 5 .mu.m and a length of at most 50 .mu.

Abstract: Disclosed is a stainless steel member with a high corrosion resistance suitable for a structural member used in highly corrosive environments, such as an edge seal plate of a molten carbonate fuel cell. This stainless steel member includes a base material consisting of stainless steel containing chromium, and a corrosion-protective layer formed on the surface of the base material. In this corrosion-protective layer, a granular heterophase containing chromium is precipitated in an ordered alloy consisting of aluminum and the constituent elements of the base material.

Abstract: A fluorescent lamp characterized in that the charging tendency of a phosphor used is positioned more negative side than that of metal oxides each having a metal ion electronegativity X.sub.i of 7.0 but more positive side than that of metal oxides each having a metal ion electronegativity X.sub.i of 11.8, that particles of the phosphor are charged positive and smaller than 3.0 .mu.C per gram when they are in contact with soda lime glass beads each having a particle size of 200-500 .mu.m, or that they are charged negative and larger than -0.5 .mu.C per gram when they are in contact with reduced iron powder having a particle size of 44-74 .mu.m.

Abstract: A long-life molten carbonate fuel cell in which outflow of an electrolyte in an electrolyte body sandwiched between a pair of electrodes is reduced to suppress an increase in internal pressure of the electrolyte body and generation of a gas crossover which are caused by the outflow of the electrolyte is disclosed. The molten carbonate fuel cell includes a pair of conductive electrodes, an electrolyte body sandwiched between the pair of electrodes and constituted by a porous body containing as a filler at least two heterogeneous particles selected from the group consisting of LiAl.sub.x O.sub.y (4.5.ltoreq.x.ltoreq.5.5 and 7.25.ltoreq.y .ltoreq.8.75), LiAl.sub.a O.sub.b (0.89.ltoreq.a .ltoreq.1.11 and 1.80.ltoreq.b.ltoreq.2.