Korea Institute of Energy Research

Il Hyun Baek

Sung Chan Nam

Jong Kyun You

Ki-Tae Park

Yeo Il Yoon

Soon Kwan Jeong

See Hoon Lee

Sang Do Kim

Jung Hoon Park

Si Hyun Lee

Jeong Nam Kim

Sang Do Park

Sung Youl Park

JeongnNam Kim

Dong Hyuk Jeon

SungYoun Kim

Dae Hoon Kim

SeongKi Lee

YongWoon Lee

Pankaj Sharma

Jin Ah Lim

Disclosed is an adsorbent containing a metal oxide for adsorption of hydrogen sulfide in biogas, and a biogas purification system using the same.

Hydrogen sulfide adsorbent in biogas and biogas purification system using the same

Disclosed is an absorbent containing an amine for absorption of an acid gas in a biogas, and a biogas purification system using the same.

Acid gas absorbent in biogas and biogas purification system using the same

A method for regenerating an amine-based, acid gas absorbent using a mixed catalyst containing silver oxide and silver carbonate includes the steps of absorbing an acid gas into an acid gas absorbent having an amine group to obtain an acid gas-absorbed absorbent; and regenerating the amine-based, acid gas absorbent by adding a catalyst mixture containing silver oxide and silver carbonate to the acid gas-absorbed absorbent and by removing the acid gas at a temperature ranging from 40&#xb0; C. to 86&#xb0; C. When the amine-based acid gas absorbent is an acid gas absorbent solution and when the acid gas that is absorbed into the acid gas absorbent solution is carbon dioxide, the catalyst mixture efficiently promotes decomposition of carbon dioxide-bound carbamate in the acid gas absorbent solution that absorbs the carbon dioxide through a novel catalytic reaction pathway.

Method for regenerating an amine-based, acid gas absorbent using a catalyst mixture containing silver oxide and silver carbonbate

The present invention relates to a system and a method therefor capable of reducing the amount of heat which must be supplied to a regeneration tower for regenerating an absorbent in an acid gas capture system for such acid gas as carbon dioxide, and provides an acid gas capture system and an acid gas capture method capable of reducing energy consumption by using the heat from the system itself in an acid gas capture system. The system and method according to the present invention have the benefit of saving energy by lowering the thermal demand of a reboiler by using the low-temperature steam condensate generated in the capture system to cool the upper end of the regeneration tower and a steam generator and compressor.

Acid gas capture system and method saving energy by cooling absorbent, which has passed reboiler, by means of steam condensate

The present invention relates to an acid gas capture system and method which can reduce the energy consumption by using the heat from the system itself of an acid gas capture system. The system and method according to the present invention causes heat exchange to occur between an absorbent discharged from the upper part of an absorption tower of the capture system and a mixed gas comprising an acid gas, and a portion of an absorbent solution which has absorbed the acid gas discharged from the lower part of the absorption tower, and additionally, the remaining absorbent solution excluding said portion thereof undergoes heat exchange with the regenerated high-temperature absorbent solution discharged from the reboiler to preheat the absorbent solution supplied to the regeneration tower, thereby reducing the thermal energy required by same.

Energy-saving acid gas capture system and method

Disclosed is a novel adsorbent having excellent adsorption durability and high adsorption efficiency while having improved durability, thereby improving a carbon dioxide (CO2) separation process. A mesoporous cellular foam impregnated with an iron (Fe)-substituted heteropolyacid includes a mesoporous cellular foam support and an Fe-substituted heteropolyacid, and the mesoporous cellular foam impregnated with an Fe-substituted heteropolyacid has superior CO2 adsorption performance and exhibits excellent reproduction performance even after CO2 adsorption and desorption are performed several times through temperature changes, thereby enabling efficient and economical CO2 separation.

Mesoporous cellular foam impregnated with iron-substituted heteropolyacid, preparation method therefor, and carbon dioxide separation method using same

The present invention relates to a system and a method therefor capable of reducing the amount of heat which must be supplied to a regeneration tower for regenerating an absorbent in an acid gas capture process for such acid gas as carbon dioxide and provides a low energy-type acid gas capture system and method using recirculation of an absorbent capable of reducing energy consumption by recirculating the absorbent, from which acid gas has been pre-separated, to an absorption tower before supplying the absorbent to the regeneration tower in an acid gas capture system.

Low energy-type acid gas capture system and method using recirculation of absorbent

Disclosed is a system and method of separating and collecting acid gas such as carbon dioxide in which the energy consumption in a stripping column for regenerating an absorbent may be reduced. In the system and method, the energy consumption may be reduced using heat generated during the acidic gas separation and collection processes. In the system and method, a low-temperature condensate from a condenser may be preheated by heat exchange with a high-temperature processed gas, and then supplied into the stripping column, thereby to reduce the heat duty of a reboiler and the energy consumption in the condenser for cooling. A partial flow of a carbon diode-absorbed absorbent from an absorber column may be preheated by heat exchange with high-temperature processed gas from an upper portion of the stripping column, and then supplied into the stripping column, thereby to further reduce the heat duty of the reboiler.

System and method for separation and recovery of acid gas

Provided is a system and method in which a heat amount to be supplied to a regeneration tower for regenerating an absorbent may be lowered in an acidic gas capturing system for capturing acidic gas such as carbon dioxide. According to the system and method of capturing acidic gas, heat generated in the system itself is used to reduce energy consumption. According to the system and method of the inventive concept, heat exchange is conducted between low-temperature separated water generated in a capturing process and high-temperature processing gas to thereby reduce a cooling capacity of a condenser when condensing the processing gas, and also, a reboiler heat duty may be lowered by introducing the low-temperature separated water in a preheated state into the regeneration tower. In addition, the low-temperature separated water is used also in cooling a washing tower and a dilute solution through a heat integration process with respect to condensed water generated from the process itself, and thus, reduction of energy consumption of an absorbent regeneration process may be facilitated.

Energy-saving system and method of capturing acidic gas by using separated water

The present invention relates to an ionic liquid-polymer gel membrane with improved gas permeability, and a preparation method thereof, and more specifically, to a membrane prepared to allow an ionic liquid to be dispersed in a polymer gel, thereby improving gas permeability. Particularly, the present invention relates to an ionic liquid-polymer gel membrane wherein membrane selectivity and permeability exceed an upper bound by increasing the amount of dispersed ionic liquid, and a preparation method thereof. The preparation method of the membrane for separating a specific gas from a mixture gas according to the present invention comprises the following steps of: mixing a polymer, an ionic liquid and PC as a solvent to prepare a mixture solution; and drying the mixture solution to remove the solvent from the mixture solution. In addition, the polymer is polyvinylidene fluoride-hexafluoropropyl copolymer (PVdF-HFP), and the ionic liquid is 1-ethyl-3-methylimidazolium tetrafluoroborate ([emim][BF]).

Ionic liquid-polymer gel membrane with improved gas permeability, and preparation method thereof

Provided is an absorbent for capturing carbon dioxide. The absorbent may include an amino acid with multiple amine groups and an alkali-metal hydroxide mixed with the amino acid and thus, may increase an absorption capacity for carbon dioxide. When a sterically hindered effect is induced to the amino acid with multiple amine groups, the absorption capacity for carbon dioxide may increase and heat of absorption reaction may decrease and thus, energy consumed for regeneration of an absorbent may be reduced. The absorbent for capturing carbon dioxide may include amino acid with multiple amine groups and the metal hydroxide, and may provide a functional group around the amine groups to cause an sterically hindered effect and thus, the absorption capacity for carbon dioxide and an carbon dioxide absorption rate may increase, and the capital cost for a carbon dioxide capturing process and an operating cost may be significantly reduced.

Absorbent for capturing carbon dioxide including amino acid having multi amine groups and metal hydroxide

Disclosed are a multi water-gas shift membrane reactor for producing high-concentration hydrogen and a method for producing hydrogen using the same. More specifically, disclosed are a multi water-gas shift membrane reactor wherein high-concentration carbon monoxide, obtained by dry-gasification performed by reacting dry bituminous coal with water and oxygen, reacts with water gas in the presence of catalysts in a single reactor, to produce hydrogen and carbon dioxide and separate highly pure hydrogen and carbon dioxide through a separation membrane arranged in a low region, and a method for producing hydrogen.

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Daejeon, South Korea

Il Hyun Baek