Abstract:
본 발명은 이산화탄소를 포함하는 석탄화력발전소 연소배가스로부터 이산화탄소를 흡수하는데 사용되는 개선된 이산화탄소 흡수용 조성물로서 암모니아수로부터 암모니아의 증발을 억제하고 이산화탄소 흡수 속도를 개선할 수 있는 이산화탄소 흡수용 조성물 및 이를 사용하는 이산화탄소의 흡수 방법 및 장치에 관한 것이다.
Abstract:
The present invention relates to a catalyst purification device for the engine of a vehicle capable of purifying ammonia slip using an ammonia oxidation catalyst (AOC) according to the structure of an exhaust gas path and a control method thereof. More specifically, the present invention can oxidize the ammonia slip used not to be oxidized to a catalyst or an SCR catalyst by purifying the ammonia slip of exhaust gas caused from an engine for a vehicle, which is operated by each of fuel for a spark ignition engine and liquid ammonia fuel or mixing them, using an AOC catalyst device according to the set conditions of a vehicle and the exhaust gas, and can emit the lower amount of NOX caused when ammonia is oxidized than the emission standard of harmful ingredients of the exhaust gas because the minimum amount of the NOX is emitted to the outside by purifying the NOX using a second catalyst device; thereby preventing environmental contamination. Also, the present invention can minimize the amount of the ammonia emitted to the atmosphere since the activation hours of the catalyst is reduced by positioning an AOC catalyst close to the engine with a primary catalyst, and can extend the life of the catalyst since the catalyst is protected by changing the path if there is a possibility that the AOC catalyst is damaged by the high temperature of the exhaust gas.
Abstract:
The present invention relates to a method for producing ammonia, wherein the ammonia is produced from water vapor and nitrogen gas supplied together, while carrying out a reforming process of hydrocarbon based fuel gas through a ion-conducting gas separation membrane by receiving oxygen absorbed in the reforming process of hydrocarbon based fuel gas from water vapor supplied to the opposite side to the side to which the hydrocarbon based fuel gas of the gas separation membrane is supplied through an ion permeation method. The method of the present invention comprises: a step of supplying hydrocarbon based fuel gas, while maintaining the temperature of 500°C to 700°C in a device for producing ammonia of which an inner space is divided into a first space and a second space by a gas separation membrane, which is a border, to allow one side of the gas separation membrane to contact with the first space; a step of supplying water vapor (H_2O) and nitrogen (N_2) gas with the pressure of 1 to 10 atm to allow the other side of the gas separation membrane to contact with the second space; a step of obtaining synthesis gas, which is a reaction product generated in the first space; and a step of obtaining ammonia which is produced in the second space. The method for producing ammonia of the present invention can produce ammonia from water vapor and nitrogen without electric energy supplied from outside as well as has an advantage of reforming hydrocarbon based fuel gas at the same time.
Abstract:
본 발명은 연속 산소 흡탈착 장치 및 이를 이용한 연속 산소 흡탈착 방법에 관한 것으로서, 보다 자세하게는 BaMg(CO 3 ) 2 입자 또는 BaMg(CO 3 ) 2 의 외부에 MgCO 3 또는 Mg(OH) 2 가 부착된 입자에서 선택된 산소 선택성 흡탈착제가 충진된 다수의 흡탈착탑을 이용하여 고순도의 산소 제품을 생산하기 위한 연속 산소 흡탈착 장치 및 이를 이용한 연속 산소 흡탈착 방법에 관한 것이다. 본 발명에 따른 연속 산소 흡탈착 장치 및 이를 이용한 연속 산소 흡탈착 방법은 산소 혼합기체에 포함된 산소에 대한 흡착 선택성을 향상시켜 고순도의 산소 제품이 생산되도록 한 것으로써, 상기 압력변동흡착장치의 각 흡착관 내에 충진되는 흡탈착제를 BaMg(CO 3 ) 2 입자 또는 BaMg(CO 3 ) 2 의 외부에 MgCO 3 또는 Mg(OH) 2 가 부착된 입자로 사용함으로써 산소의 흡착 효율을 향상시킬 수 있는 장점이 있다. 더불어, 본 발명은 산소 흡탈착 공정 과정에서 최종 압력을 진공으로 유지시킴에 의해서 산소 회수율을 향상시키는 작용효과가 발휘된다.
Abstract:
A natural gas liquefaction system of the present invention comprises a pre-cooling unit, a gas and liquid separation unit, a first heat exchanging unit, a second heat exchanging unit, a first expansion unit, a second expansion unit, a first mixed refrigerant conversion unit, a pre-cooling refrigerant supplying unit, a natural gas supplying unit, and a mixer. A natural gas liquefaction method of the present invention comprises a first pre-cooling step (S01), a first mixed refrigerant separation step (S02), a first introduction step (S03), a first expansion refrigerant formation step (S04), a second introduction step (S05), a second expansion refrigerant formation step (S06), and a second freezing step (S07).
Abstract:
This invention relates to at least one absorbent additive selected from DEPG and NMP which are additives added to an absorbent for an absorbing process separating methane from the biogas and the process separating methane gas from biogas. By using the absorbent additives, the pressure of the biogas being introduced to an absorption tower while the absorption amount of carbon dioxide is maintained, thereby reducing the cost of compression, and the absorption amount of carbon dioxide is maintained even when absorption temperature at the same absorption pressure is increased, thereby saving the cooling cost of absorbent.