Abstract:
The present invention relates to a method for manufacturing an iron-carbide/silica nanocomposite catalyst for Fischer-Tropsch synthesis, to a catalyst thereof, to a method for synthesizing liquid hydrocarbon using the same, and to liquid hydrocarbon thereof. Provided are an iron-carbide/silica catalyst for Fischer-Tropsch synthesis, in which an iron-silicate structure having large specific surface area and having well developed pores is first formed by a hydrothermal reaction of silica particles with a nanostructure and an iron salt, and the same is activated in the presence of high temperature carbon monoxide to have high reactivity for Fischer-Tropsch synthesis, and a method for manufacturing the same. And provided are a method for effectively manufacturing liquid hydrocarbon based on high CO conversion ratio and selectivity by Fischer-Tropsch synthesis using the manufactured iron-carbide/silica composite catalyst, and liquid hydrocarbon thereof.
Abstract:
Disclosed are a method for manufacturing a dye-sensitized solar cell with excellent light absorption efficiency, and a solar cell thereof. According to the present invention, the method for fabricating a negative electrode for dye-sensitized solar cells comprises: a step S1 for preparing a transparent substrate having a transparent conductive oxide layer; a step S2 for forming a nano-oxide layer by coating the upper part of the transparent conductive oxide layer with a composition containing titanium dioxide, and then applying heat treatment; and a step S3 for forming a negative electrode having a dye layer by enabling the nano-oxide layer to absorb a dye, and then drying the nano-oxide layer. The dye layer is composed of a dye absorbing short-wavelength light and long-wavelength light. As a result, the method for manufacturing a dye-sensitized solar cell with excellent light absorption efficiency improves light conversion efficiency by enabling short-wavelength sunlight to be absorbed in the solar cell before the sunlight is dissipated.
Abstract:
The present invention relates to iron oxalate hydrate particles with controlled shapes and a manufacturing method thereof, iron oxide-carbon composites manufactured using the iron oxalate hydrate particles and a manufacturing method thereof, and the purpose thereof for manufacturing ferric oxalate particles with variously controlled shapes by conducting high temperature hydrolysis reaction of saccharides supplying carbon and the aqueous solution of a surfactant and water and providing oxidized iron/carbon composite therefrom. The present invention includes ferric hydroxide salt, a step of mixing the surfactant and saccharides with distilled water in a reactor; a step of forming iron oxalate particle with controlled shapes; a step of separating and washing it by putting distilled water or ethanol after reducing the temperature up to room temperature; a step of powderizing the iron oxalate particle; a step of high temperature sintering the iron oxalate particle under atmospheric condition or an inert gas atmosphere for hydrolysis to form oxidized iron particle among residual carbons. [Reference numerals] (S100) Step of mixing ferric hydroxide salt, a surfactant and saccharides with distilled water in a reactor; (S200) Step of forming iron oxalate particles with controlled shapes by decomposing ferric hydroxide salt through a hydrothermal reaction after temperature rising; (S300) Step of performing dispersing and washing by putting distilled water or ethanol after reducing the temperature up to room temperature; (S400) Step of performing centrifugation on the iron oxalate particles using a centrifuge; (S500) Step of powderizing the iron oxalate particles; (S600) Step of re-dispersing and washing using distilled water or ethanol after centrifugation; (S700) Step of high temperature sintering the iron oxalate particles with a controlled shape in a power condition under atmospheric condition or an inert gas atmosphere for hydrolysis to form oxidized iron particle among residual carbons
Abstract:
Disclosed are a production method of an Fe/carbon nanocomposite catalyst for the Fischer-tropsch synthesis which comprises the following steps: a mixing step of mixing an Fe metallic hydrate salt with porous carbon supporters; an impregnation step of melting and impregnating the mixture around a melting point of the Fe metallic hydrate salt, and impregnating the Fe metallic hydrate salt to the carbon supporters; a particle formation step of plasticizing the Fe metallic hydrate salt in the carbon supporters at high temperatures and under the carbon monoxide or hydrogen atmosphere, for forming metallic Fe carbide particles in the carbon supporters; and a drying step of passivating the Fe carbide particles with ethanol, and vacuum-drying the Fe carbide particles, the Fe/carbon nanocomposite catalyst produced by the same, and a production method of liquid hydrocarbon using the same. [Reference numerals] (AA) Iron hydrate salt;(BB) Porous carbon supporter;(CC) Low-temperature aging;(DD) Form amorphous Fe-C composites;(EE) High-temperature decomposition;(FF) Iron carbide / charcoal nanostructures;(S104) Fe-carbide catalyst activated outside reactor
Abstract:
PURPOSE: A synthetic fuel production apparatus using biomethane and a method thereof are provided to be used for vehicles and power generation plants. CONSTITUTION: A biogas reservoir(1) collects biogas from a biogas generation place and stores the biogas. A biogas purifier(2) separates biomethane with high purity from the biogas. A steam methane reforming device(3) is composed of a modular metal structure catalyst which generates synthetic gas by reforming the biomethane and a modular heat exchange reactor with multiple pipes. The Fisher-Tropsch synthesis reactor(5) is composed of a modular metal structure catalyst which liquefies the biogas to generate synthetic fuel and a modular heat exchange reactor with multiple pipes. An electricity generating device for a fuel cell(6) generates electricity using hydrogen with high purity as a raw material. [Reference numerals] (AA) H_2/CO rate 3:1; (BB) H_2/CO rate 2:1
Abstract:
따라서, 본발명이해결하고자하는기술적과제는향상된투명도를제공하고외부의광원에의하여자체적으로전기변색이가능하여스마트윈도우의품위를향상시킬수 있는, 동시에입자결정성을용이하게조절할수 있고상순도(phase purity)가향상되어변색특성이향상된광감응자동색변환소자를제공하는것이다.