Abstract:
The present invention relates to a method for manufacturing carbon nanofiber. More specifically, the method includes the steps of: manufacturing carbon nanofiber by performing a synthetic gas reaction at 400-850°C under high pressure so as to manufacture the carbon nanofiber; refining the carbon nanofiber by treating the carbon nanofiber, manufactured in the earlier step, with acid; and neutralizing the carbon nanofiber refined in the earlier step. When compared to the prior method, the method of the present invention: includes significantly shortened processes; is economic; and includes processes that can be continuously performed.
Abstract:
PURPOSE: An imidazolium-based ionic liquid for isolating carbon dioxide is provided to have superior carbon dioxide absorbing ability and to easily separate absorbed carbon dioxide by heating. CONSTITUTION: An imidazolium-based ionic liquid compound has carbon dioxide absorption ability and is denoted by chemical formula 1. A carbon dioxide absorbing agent contains the compound. A method for isolating carbon dioxide from a gas mixture comprises the steps of: absorbing carbon dioxide from the gas mixture using the carbon dioxide absorbing agent; and deaerating the absorbed carbon dioxide.
Abstract:
PURPOSE: Continuous method and apparatus for preparing hydrocarbon using biological originated lipid and hydrotalcite are provided to produce the hydrocarbon without using hydrogen, and to reduce the operational costs. CONSTITUTION: A continuous method for preparing hydrocarbon using biological originated lipid and hydrotalcite comprises the following steps: supplying raw materials selected from triglyceride, fatty acid, or fatty acid derivative into a first reactor(2); contacting the raw material in the first reactor with a hydrotalcite catalyst to obtain the hydrocarbon; recycling the used hydrotalcite after the termination of the reaction inside the first reactor; supplying the raw materials into a second reactor(3) during the recycling process of the hydrotalcite; contacting the raw materials in the second reactor with the hydrotalcite catalyst to obtain the hydrocarbon; and recycling the used hydrotalcite after the termination of the reaction inside the second reactor, and repeating previous steps.
Abstract:
A packed bed type catalytic reactor is provided to bring input gas into complete contact with catalysts, thereby securing the maximum performance of the catalysts, by forming the catalytic reactor in a lattice shape, blocking upper and lower portions of a catalytic layer, and blocking an input gas discharging unit adjacent to the catalytic layer so that the input gas passes the catalytic layer vertically. A catalytic reactor comprises a plurality of exhaust gas input units(10), a plurality of exhaust gas output units(30), and a plurality of catalyst units(20), which are arranged in a lattice structure. Each of the exhaust gas input units has a closed upper portion, an exhaust gas input port formed in a lower portion thereof, and an exhaust gas input space formed therein. Each of the exhaust gas output units has a closed lower portion, an exhaust gas output port formed in an upper portion thereof, and an exhaust gas output space formed therein. Each of the catalyst units has catalysts therein, and closed upper and lower portions. A lateral portion of the catalyst unit is contacted with a lateral portion of the exhaust gas input unit and a lateral portion of the exhaust gas output unit. The exhaust gas input unit and the exhaust gas output unit are separated by the catalyst unit. Further, a net type unit for supporting catalyst is installed at a side of the plurality of catalyst units.
Abstract:
A reducing agent injector is provided to inject a reducing agent into a combustion room uniformly, thereby maximizing the efficiency in removal of nitrogen oxides, by installing a triple-pipe type injector passing through a wall of the combustion room. A reducing agent injector(14) injects a reducing agent into a combustion room, wherein the reducing agent reacts with nitrogen oxides contained in a combustion gas. The injector is installed such that the injector penetrates both walls(9) of the combustion room. The injector comprises a reducing agent supply pipe(10) having a plurality of injection nozzles(11), a cooling water supply pipe(12) for wrapping the reducing agent supply pipe, and a cooling water discharge pipe(13) communicating with the cooling water supply pipe and wrapping the cooling water supply pipe. The injection nozzles pass through the cooling water supply pipe and the cooling water discharge pipe to be exposed to an outside of the cooling water discharge pipe.
Abstract:
A method for decomposing carbon dioxide using the barium ferrite is provided to decompose almost 100% of carbon dioxide at a quick reaction rate, and to be capable of operating processes continuously by cyclone type of recovery method. A method for decomposing carbon dioxide using the barium ferrite includes the steps of: performing a hydrolysis reaction of an aqueous alkali solution(2) and a mixture(1) of aqueous nitrate solutions containing iron and barium at ambient temperature under a reaction pressure of 30-50 MPa; supplying preheated water(6) to the hydrolysis reaction step to raise the reaction temperature to 100-400 °C, and staying the preheated water for 3-10 seconds to form critical nuclei; supplying preheated water(8) to heat the hydrolysate to the supercritical temperature for water, performing a final dehydration reaction in a reactor(9) maintaining a supercritical state to collect barium ferrite continuously; and hydrogenating the barium ferrite, and then reacting the hydrogenated barium ferrite with carbon dioxide.