Abstract:
It is described a method for controlling the emission of polluting substances in a gaseous effluent produced by a combustion process comprising at least the step of putting said gaseous effluent, at a temperature within the range of 800°C - 1400°C, in contact with a sorbent composition in powder form comprising at least calcium hydroxide (Ca(OH)2), magnesium hydroxide ((MgOH)2) and magnesium oxide (MgO), said sorbent having a specific surface area (BET) greater than 20 m2 /g. A sorbent composition in powder form, said sorbent thermally activated and a process for the preparation of said sorbent composition are also described.
Abstract translation:描述了一种用于控制由燃烧过程产生的气态流出物中的污染物质的排放的方法,该方法至少包括将所述气态流出物在800℃至1400℃的温度范围内与 包含至少包含氢氧化钙(Ca(OH)2),氢氧化镁((MgOH)2)和氧化镁(MgO))的粉末形式的吸附剂组合物,所述吸附剂的比表面积(BET)大于20m 2 / g 。 还描述了粉末形式的吸附剂组合物,所述吸附剂热活化和制备所述吸附剂组合物的方法。
Abstract:
Nanowires useful as heterogeneous catalysts are provided. The nanowire catalysts are useful in a variety of catalytic reactions, for example, the oxidative coupling of methane to C2 hydrocarbons. Related methods for use and manufacture of the nanowires are also disclosed.
Abstract:
Nanowires useful as heterogeneous catalysts are provided. The nanowire catalysts are useful in a variety of catalytic reactions, for example, the oxidative coupling of methane to ethylene. Related methods for use and manufacture of the same are also disclosed. More specifically, a catalyst comprising an inorganic catalytic polycrystalline nanowire, the nanowire having a ratio of effective length to actual length of less than one and an aspect ratio of greater than ten as measured by TEM in bright field mode at 5 keV, wherein the nanowire comprises one or more elements from any of Groups 1 trough 7, lanthanides, actinides or combinations thereof. The preparation of these polycrystalline nanowires involves the use of biological template such as a bacteriophage from the M13 family comprising protein pVIII. Also, an inorganic nanowire comprising one or more metal elements from any of Groups 1 through 7, lanthanides, actinides or combinations thereof and a dopant comprising a metal element, a semi -metal element, a non-metal element or combinations thereof is disclosed and nanowires having core/shell structure are disclosed. Preparation of nanowires in the absence of biological templates is also provided.
Abstract:
The present invention refers to nanocrystaline spherical ceramic oxides, to the process for the synthesis and use thereof. These oxides, obtained by detonation of a water-in-oil emulsion (W/O), besides having a spherical morphology and nanocrystallinity, show a set of complementary features, namely a particle dimension inferior to 40 μm, bimodal particle size distribution, high purity, deagglomeration and stable crystalline stages. This set of features makes these powders particularly suitable for several applications such as coating processes, near net shape processes and, when applied in ceramics industry, they provide dense and porous ceramic objects of exceptionally high mechanical resistance.
Abstract:
This invention is directed to modification of a protective layer to solve both problems of "discharge delay" and "temperature dependency of discharge delay" while realizing good drive at low voltage. There is also provided a plasma display panel, which can realize excellent display properties, by solving the above problems and, further, suppressing "dependency of discharge delay upon space charge". An alkoxide of magnesium having a purity of not less than 99.95% (Mg(OR) 2 ) or acetylacetone of magnesium having a purity of not less than 99.95% is provided. A small amount of acid is added to this aqueous solution for hydrolysis to prepare a gel of magnesium hydroxide as an MgO precursor. The gel is fired in the air at a temperature of 700°C or above to prepare a powder containing MgO fine particles (16a to 16d) having an NaCl crystal structure surrounded by (100) face, (110) face and (111) face. The powder is coated on the dielectric layer (7) or surface layer (8) to form a group of MgO fine particles (16).