Korea Institute of Energy Research

Jung Il Yang

Heon Jung

Ji Chan Park

Dong Hyun Chun

Ho Young Lee

Sung Jun Hong

Hak Joo Kim

Tak Hyoung Lim

Jung Hoon Yang

Seok Yong Hong

Ho Taek Lee

Jong Nam Kim

Soon Haeng Cho

Jong Kee Park

Byung Kwon Kim

Shin Wook Kang

Hee Tae Beom

Jae In Kwon

The present invention relates to a method for producing liquid or solid hydrocarbons from a synthesis gas via Fischer-Tropsch synthesis which does not carry out a separate reduction pre-treatment for catalyst activation. The method for producing liquid or solid hydrocarbons from a synthesis gas using Fischer-Tropsch synthesis according to the present invention comprises: a first step of applying an iron-based catalyst for the Fischer-Tropsch synthesis in which the number of iron atoms in the ferrihydrite phase fraction equals 10 to 100% and the number of iron atoms in the hematite phase fraction equals 0 to 90%, with respect to 100% of the number of the number of iron atoms, to a Fischer-Tropsch synthesis reactor; and a second step of activating the catalyst for the Fischer-Tropsch synthesis by a synthesis gas which is a reactant under the conditions of the Fischer-Tropsch synthesis and carrying out the Fischer-Tropsch synthesis by means of the activated catalyst for the Fischer-Tropsch synthesis. As such, the present invention is capable of efficiently producing liquid or solid hydrocarbons from a synthesis gas via Fischer-Tropsch synthesis, even without a separate reduction pre-treatment.

Method of manufacturing iron-base catalysts and methods of manufacturing hydrocarbons using iron-base catalysts made by the method

The present invention relates to a metal oxalate hydrate body having a certain shape, a preparation method thereof, and a metal oxide/carbon composite body prepared by using the metal oxalate hydrate body. In the present invention, the metal oxalate body, whose shape is diversely controlled, and the metal oxide/carbon composite body therefrom are provided.

Metal oxalate hydrate body having a certain shape, preparation method thereof, and metal oxide/carbon composite body prepared from the same

The present invention relates to a method of methane steam reforming using a nickel/alumina nanocomposite catalyst. More specifically, the present invention relates to a method of carrying out methane steam reforming using a nickel/alumina nanocomposite catalyst wherein nickel metal nanoparticles are uniformly loaded in a high amount on a support via a melt infiltration method with an excellent methane conversion even under a relatively severe reaction condition of a high gas hourly space velocity or low steam supply, and to a catalyst for this method. In addition, the present invention prepares a nickel/silica-alumina hybrid nanocatalyst by mixing the catalyst prepared by the melt infiltration method as the first catalyst and the nickel silica yolk-shell catalyst as the second catalyst, and applies it to the steam reforming of methane to provide a still more excellent catalytic activity even under the higher temperature of 700&#xb0; C. or more with the excellent methane conversion.

Methane steam reforming, using nickel/alumina nanocomposite catalyst or nickel/silica-alumina hybrid nanocomposite catalyst

The present invention relates to an egg-shell type hybrid structure of highly dispersed nanoparticles-metal oxide support, a preparation method thereof, and a use thereof. Specifically, the present invention relates to an egg-shell type hybrid structure of highly dispersed nanoparticles-metal oxide support, providing an excellent platform in a size of nanometers or micrometers which can support nanoparticles selectively in the porous shell portion by employing a metal oxide support with an average diameter of nanometers or micrometers including a core of nonporous metal oxide and a shell of porous metal oxides, a preparation method thereof, and a use thereof.

Egg-shell type hybrid structure of highly dispersed nanoparticle-metal oxide support, preparation method thereof, and use thereof

Provided are particle size-controlled, chromium oxide particles or composite particles of iron oxide-chromium alloy and chromium oxide; a preparation method thereof; and use thereof, in which the chromium oxide particles or the composite particles of iron oxide-chromium alloy and chromium oxide having a desired particle size are prepared in a simpler and more efficient manner by using porous carbon material particles having a large pore volume as a sacrificial template. When the chromium oxide particles or the composite particles of iron oxide-chromium alloy and chromium oxide thus obtained are applied to gas-phase and liquid-phase catalytic reactions, they are advantageous in terms of diffusion of reactants due to particle uniformity, high-temperature stability may be obtained, and excellent reaction results may be obtained under severe reaction environment.

Preparation method of particle size-controlled, chromium oxide particles or composite particles of iron oxide-chromium alloy and chromium oxide

The present invention provides an iron-carbide/silica composite catalyst that is highly reactive to a Fischer-Tropsch synthesis by firstly forming an iron-silicate structure having large specific surface area and well-developed pores through a hydrothermal reaction of an iron salt with a silica particle having a nanostructure, and then activating the iron-silicate structure in a high temperature carbon monoxide atmosphere. When using the iron-carbide/silica composite catalyst according to the present invention in the Fischer-Tropsch synthesis reaction, it is possible to effectively prepare liquid hydrocarbon with a high CO conversion rate and selectivity.

Porous iron-silicate with radially developed branch, and iron-carbide/silica composite catalyst prepared therefrom

This invention relates to a method of preparing an iron carbide/carbon nanocomposite catalyst containing potassium for high temperature Fischer-Tropsch (FT) synthesis reaction and the iron carbide/carbon nanocomposite catalyst prepared thereby, and a method of manufacturing a liquid hydrocarbon using the same and a liquid hydrocarbon manufactured thereby, wherein a porous carbon support is uniformly impregnated with an iron hydrate using melt infiltration, and potassium is also supported together via various addition processes, including a pre-addition process of a potassium salt which is ground upon impregnation with the iron hydrate, or a mid- or post-addition process of a potassium solution using incipient wetness impregnation after impregnation with the iron hydrate. Accordingly, the highly active iron carbide/potassium/carbon composite catalyst for high temperature FT reaction in which 5&#x2dc;30 wt % of active iron carbide particles are supported on the porous carbon support can be obtained and is structurally stable to heat even in high temperature FT reaction of 300&#xb0; C. or more, and liquid hydrocarbons can be selectively obtained at high yields.

Method of preparing iron carbide/carbon nanocomposite catalyst containing potassium for high temperature fischer-tropsch synthesis reaction and the iron carbide/carbon nanocomposite catalyst prepared thereby, and method of manufacturing liquid hydrocarbon using the same and liquid hydrocarbon manufactured thereby

The present invention relates to a metal carbide/carbon composite body having a porous structure, in which core-shell unit particles are three-dimensionally connected, a preparation method thereof, and the use of the composite body. More specifically, the present invention provides a metal carbide/carbon composite body, a preparation method thereof, and the use of the composite body, wherein the composite body is formed by high-temperature calcination of a metal oxalate hydrate body under a carbon monoxide-containing gas atmosphere, wherein the metal carbide/carbon composite body has a porous structure in which core-shell unit particles are three-dimensionally connected, wherein the core-shell unit particles comprise a metal carbide core formed by thermal decomposition of a metal oxalate hydrate; and a graphitic carbon shell, the product resulting from Boudouard reaction of carbon monoxide, formed on the metal carbide core.

Metal carbide/carbon composite body having porous structure by three-dimensional connection of core-shell unit particles, preparation method thereof, and use of the composite body

A second stage Fischer-Tropsch reaction system to enhance a conversion ratio of a synthetic gas, includes, at least one first reactor that uses a Fe catalyst, receives a first synthetic gas extracted from a coal, biomass or natural gas, and reacts the first synthetic gas with the Fe catalyst to obtain a synthetic fuel, and a second reactor that uses a Fe.Co or Co catalyst, receives a second synthetic gas discharged from the first reactors after reaction, and reacts the second synthetic gas with the Fe.Co or Co catalyst to obtain a synthetic fuel.

Second stage Fischer-Tropsch reaction system to enhance the conversion of synthetic gas

Disclosed is a method for manufacturing an iron catalyst, the method including: a mixing stage where a mixture solution is manufactured by mixing iron nitrate (Fe(NO)) solution and copper nitrate (Cu(NO)) solution; a precipitation slurry-forming stage where a precipitation slurry is formed by adding at least one of sodium carbonate (NaCO) or sodium hydroxide (NaCO) solutions to the mixture solution; a washing stage where the precipitation slurry is filtered and washed with distilled water; a silica adding stage where fumed silica powder and potassium carbonate (KCO) solution are added to the precipitation slurry and then agitated; a drying stage where the precipitation slurry is passed through a sieve having a size of 30 &#x3bc;m to 100 &#x3bc;m and dried by a spry drying method to manufacture a powdered iron catalyst; and a heat treatment stage where the iron catalyst is dried at a temperature of 50&#xb0; to 150&#xb0; C., and then heat-treated at a temperature of 300&#xb0; C. to 500&#xb0; C.

Method for manufacturing iron catalyst

Disclosed is an adsorptive ethanol drying apparatus in which microwaves are applied during the regeneration of an absorbent conducted in a continuous adsorption process for drying ethanol, so that the absorbent regeneration can be rapidly achieved at a temperature lower than that used in a conventional heating type regeneration method and within a reduced processing time, thereby being capable of allowing an efficient use of energy while improving the productivity per adsorbent mass. A method for operating the adsorptive ethanol drying apparatus is also disclosed. At an adsorption step, a vaporized ethanol azeotropic mixture is forced to pass through adsorption towers to adsorb water contained in the vaporized ethanol azeotropic mixture to an adsorbent charged in each of the adsorption towers while condensing ethanol in a storage tank. Simultaneously with the adsorption step conducted in one of the adsorption towers, microwaves generated from a microwave generating device are guided to the other adsorption tower via waveguides in accordance with a switching operation of a switching waveguide, thereby activating water adsorbed to the adsorbent in the adsorption step to allow the water to be desorbed from the adsorbent. Slight vacuum is also applied to the other adsorption tower, thereby removing the desorbed water.

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Daejeon, South Korea

Jung Il Yang