Abstract:
PURPOSE: A composition for absorbing carbon dioxide, a composition for improving the absorbing speed of carbon dioxide and suppressing the evaporation of ammonia, and a method for the same are provided to improve the purify of collected carbon dioxide gas and reducing the discharge of ammonia from treated mixed gas. CONSTITUTION: A composition for absorbing carbon dioxide includes an amine-based additive and ammonia water. The ammine-based additive is capable of being a compound containing two or more amine groups. The amine-based additive is capable of being a heterocyclic compound containing a secondary or tertiary amine group in a ring structure. The amine-based additive is capable of being a compound substituted with a primary amine, secondary amine, tertiary amine, or hydroxyl group. The amine-based additive is capable of being selected from 2-hydroxyl ethyl piperazine, homopiperazine, 1-methylpiperazine, 2-methylpiperazine, 1,4-dimethylpiperazine, 1,4-bis(2-hydroxyethyl)piperazine, 1-(2-aminoethyl)piperazine, 2-piperazine-1-ethanol, and a combination of the same. The amine-based additive is capable of being selected from a group including triethylene triamine, triethylene tetraamine, and the combination of the same.
Abstract:
PURPOSE: A collecting method of lipids from microalgae is provided to effectively collect lipids among various components in microalgae by simple processes, and to manufacture a part of pure hydrocarbon consisting of only carbon and hydrogen by decomposing lipids during thermal decomposition. CONSTITUTION: A collecting method of lipids from microalgae comprises a step of primary thermal-decomposing microalgae biomass at 250-400 °C; a step of removing saccharides and proteins from the microalgae biomass; and a step of obtaining primary decomposed product; a step of secondary decomposing the primary decomposed product and collecting only lipids, which are able to be converted to fuel easily.
Abstract:
PURPOSE: An oxygen selective absorber and a method for preparing the same are provided to uniformly form a protective film on the surface of barium-contained compound using magnesium oxide. CONSTITUTION: Magnesium alkoxide is dissolved in alcohol in order to obtain magnesium oxide precursor solution. A barium-contained compound is dispersed in the magnesium oxide precursor solution in order to solate the dispersion solution. Distilled water is added to the solated dispersion solution in order to be gelated. The gelated dispersion solution is undergone a drying process and a sintering process.
Abstract:
본 발명은 화석연료 연소 배가스에서 이산화탄소를 분리하는 암모니아수를 이용한 이산화탄소 포집공정에서 이산화탄소가 제거된 배출가스 내에 들어 있는 미량의 암모니아를 효율적으로 제거하는 장치에 관한 것이다. 이러한 본 발명의 암모니아수를 이용한 배가스 이산화탄소 포집 공정에서 배출되는 가스 내의 미량 암모니아를 제거하는 장치는 암모니아수를 이용하여 배기가스로부터 이산화탄소를 선택적으로 흡수하기 위한 흡수탑과 ; 이산화탄소가 흡수된 이산화탄소 함유 암모니아수에서 이산화탄소를 탈기시키기 위한 탈거탑과 ; 상기 흡수탑으로부터 증발된 기체상의 암모니아를 포집하여 암모니아 회수탑으로 보내거나 배출시키는 세정탑과 ; 상기 세정탑과 상기 탈거탑 상단에서 기체상에 들어 있던 증발된 암모니아를 포집한 암모니아수를 가열하여 암모니아 기체와 물로 분리하여 암모니아를 회수하는 암모니아 회수탑과 ; 상기 세정탑에서 포집되지 않고 배출가스로 유출되는 암모니아를 황산과 반응시켜 처리하는 암모니아 회수장치로 구성되고, 상기 암모니아 회수장치는 이산화탄소가 제거된 배가스가 공급되는 관과 ; 상기 관을 통해 공급되는 배가스 내 포함된 암모니아를 황산용액과 반응시켜 황산암모늄이 석출되게 하는 반응기와 ; 상기 반응기에 황산을 공급하는 황산공급수단과 ; 상기 황산공급수단을 통해 공급되는 황산의 농도가 일정하게 유지되게 물을 공급하는 물공급수단을 포함하여 구성됨을 특징으로 한다. 암모니아 회수, 폴리싱, 황산, 이산화탄소, 포집
Abstract:
PURPOSE: A method for manufacturing ash-free coal including a desulfurization process is provided to extract organic components by mixing low class coal and solvent and reacting the mixed low class coal at pre-set temperature. CONSTITUTION: Coal and solvent are mixed in a pre-set ratio to be in a slurry state. The slurry state mixture is introduced into an extractor(2), and the reaction of the mixture is accelerated based on ultrasonic wave. Organic components contained in the coal are dissolved in the solvent. The dissolved organic components and non-dissolved particles are separated. A sulfur compound contained in the dissolved organic components is eliminated. The desulfured organic components are dried to obtain ash-free coal(8) in a solid state.
Abstract:
A method for preparing a silver nitrate-supported adsorbent for olefin/paraffin separation is provided to reduce consumption of silver nitrate that occupies the most price of an adsorbent, thereby lower the price of the adsorbent by treating an aluminosilica gel with a basic solution, thereby removing small pores of the aluminosilica gel that does not take part in the adsorption actually, and a silver nitrate-supported adsorbent for olefin/paraffin separation prepared by the method is provided. As a method for preparing an adsorbent in which silver nitrate(AgNO3) is supported on a pellet type matrix selected from aluminosilica gel, silica gel, and a mixture thereof, a method for preparing a silver nitrate-supported adsorbent for olefin/paraffin separation comprises the steps of: contacting the matrix with a basic solution with a concentration of 0.0125 to 0.0375 M to remove a matrix of micropores with a pore size of 20 Å or less; filtering the matrix in the basic solution, washing the filtered matrix with distilled water, and drying the washed matrix; heating the dried matrix to 300 to 400 deg.C in a nitrogen atmosphere to remove water or other contaminants contained in the matrix; impregnating the matrix that has passed through the heat treatment process in the nitrogen atmosphere with an aqueous silver nitrate solution with a concentration of 0.2 to 1.2 g AgNO3/ml by incipient wetness method, and drying the impregnated matrix in an 100 deg.C air; and heating the dried matrix to a temperature between 100 deg.C and 300 deg.C in an inert gas atmosphere, thereby removing water or impurities contained in silver nitrate during supporting of silver nitrate such that silver nitrate absorbs various olefins well.
Abstract:
A method for producing an adsorbing agent is provided to remove sulfide compound contained in gasoline for transporting or gasoline fuel, selectively, by forming the adsorbing agent of mesoporous silica carrying nickel. A saturated solution is prepared by dissolving nickel nitrate in a solvent, such as water or tetra-hydro-furan. Carriers are impregnated with the saturated solution. The impregnated carriers are dried for 4 hours within an oven of 100°C, and then reduced at a temperature of 300-700°C under a hydrogen ambience. The carriers are mesoporous silica such as MCM-41, MCM-48, SBA-15, or KIT-6. Further, the solvent is tetrahydrofuran.
Abstract:
An apparatus for separating and recovering carbon dioxide simply and efficiently is provided to recover high purity carbon dioxide, use a minimum amount of water, and scrub ammonia at a low temperature by exhausting carbon dioxide only from a mixture of carbon dioxide, water vapor and ammonia gas from an upper part of a carbon dioxide stripping tower, washing ammonia gas with water, and condensing water vapor, thereby injecting the condensed water vapor again into the stripping tower. An apparatus for producing high purity carbon dioxide from a mixed gas containing carbon dioxide comprises: a first absorption tower(101) for optionally absorbing carbon dioxide from waste gas using ammonia water; a stripping tower(103) for stripping carbon dioxide from ammonia water containing carbon dioxide; a third absorption tower(106) for absorbing ammonia gas contained in the stripped carbon dioxide using water; a second absorption tower(105) for removing ammonia contained in waste gas(114) from the top of the first absorption tower using water and sending ammonia-containing water to the third absorption tower; a first heat exchanger(102) for exchanging heat between carbon dioxide-containing ammonia water from the first absorption tower and recirculating ammonia water from the stripping tower; a concentration tower(107) for recirculating ammonia-containing water to the second absorption tower while recirculating the concentrated ammonia water to the stripping tower after concentrating some of ammonia water from the stripping tower; and a second heat exchanger(110) for exchanging heat between water discharged from the concentration tower and carbon dioxide-containing ammonia water discharged from the first heat exchanger, wherein the third absorption tower is a condensation-absorption hybrid tower for exhausting carbon dioxide only from a mixture of carbon dioxide, water vapor and ammonia gas exhausted from the top of the stripping tower, washing ammonia gas with water, and condensing water vapor to inject the condensed water vapor into the stripping tower again.
Abstract:
An olefin/paraffin selective adsorbent is provided to increase an adsorption amount of olefin, obtain a large selectivity(an adsorption amount ratio of olefin to paraffin), improve adsorption and desorption rates, and increase an efficiency of the olefin/paraffin separation process. As an adsorbent for separation of olefin/paraffin, a silver nitrate impregnated aluminosilica gel adsorbent comprises 10 to 44.4% by weight of silver nitrate impregnated in an aluminosilica gel matrix. The silver nitrate is impregnated in the aluminosilica gel matrix in an amount of 39.4 to 41.2% by weight. The silver nitrate impregnated aluminosilica gel adsorbent is used in the separation of rigid olefin/paraffin. The rigid olefin/paraffin is selected from the group consisting of ethylene/ethane, propylene/propane, and butene/butane.
Abstract:
본 발명은 5-15 wt%의 암모니아가 포함된 저농도의 암모니아 수용액 (암모니아수)을 이용하여 이산화탄소가 포함된 혼합가스에서 고순도의 이산화탄소를 회수하는 방법과 회수 장치에 대한 것이다. 본 장치는 암모니아수를 이용하여 이산화탄소를 선택적으로 흡수하기 위한 제 1 흡수탑, 이산화탄소가 제거된 배가스에 포함된 암모니아 가스를 물에 용해시켜 제거하는 제 2 흡수탑, 이산화탄소가 흡수된 흡수액에서 이산화탄소를 탈기시키기 위한 탈거탑, 탈거된 이산화탄소에 미량 함유되는 암모니아를 물로 흡수하기 위한 제 3 흡수탑, 그리고 암모니아 가스를 흡수하기 위하여 사용된 물을 제거하고 암모니아수의 농도를 높이는 농축탑과 흡수액 순환펌프, 열교환기 등으로 구성되어 있다. 암모니아수를 이용하여 이산화탄소를 회수하는 방법은 전술한 장치를 이용하는 것으로 다음과 같다. 첫째, 이산화탄소가 함유된 혼합가스를 제 1 흡수탑 하부로 공급하고 제 1 흡수탑의 상부로 20-40 o C의 암모니아수를 공급한다, 이 경우 제 1 흡수탑 상부로 이산화탄소가 제거된 배가스가 배출되고 하부로 이산화탄소가 흡수된 암모니아수가 배출된다. 제 1 흡수탑 하부로 배출되는 이산화탄소가 흡수된 암모나아수는 탈거탑의 상부로 공급되는데, 공급되는데, 탈거탑에서는 이산화탄소 함유 암모니아수를 70-88 o C로 가열하여 고순도 이산화탄소를 가스로 배출한다. 탈거탑은 일종의 증류탑으로 상부로 미량의 암모니아를 포함하는 이산화탄소가 배출되고 하부로 이산화탄소가 탈거된 암모니아수가 배출된 다. 이 암모니아수는 열교환기를 거쳐 냉각되어 제 1 흡수탑의 상부로 재순환된다. 한편 제 1 흡수탑의 상부로 배출되는 이산화탄소가 제거된 배가스는 물을 흡수액으로 사용하는 제 2 흡수탑으로 보내져서 함께 들어 있던 미량의 암모니아를 제거하고 배출된다. 제 2 흡수탑의 하부로 나오는 미량 암모니아 함유 물은 제 3 흡수탑의 상부로 공급된다. 그리고 탈거탑 상부로 배출되는 미량의 암모니아를 함유하는 이산화탄소는 물을 흡수액으로 사용하는 제 3 흡수탑으로 보내져서 암모니아가 제거되어 고순도의 이산화탄소로 배출된다. 이 때 제 3 흡수탑의 하부에서 배출되는 미량의 암모니아를 함유하는 물이 탈거탑의 상부로 공급된다. 즉, 탈거탑의 상부로는 제 1 흡수탑에서 배출되는 이산화탄소를 함유하는 암모니아수와 제 3 흡수탑에서 나오는 미량의 암모니아를 함유한 물이 동시에 공급된다. 전술한 바와 같이 탈거탑 하부로 배출되는 이산화탄소가 탈거된 암모니아수는 열교환기에서 냉각된 다음에 제 1 흡수탑으로 재순환되고 일부는 일종의 증류탑인 암모니아 농축탑의 상부로 공급된다. 암모니아 농축탑의 하부로는 암모니아 제 2 흡수탑의 상부로 공급된 물의 양에 해당하는 양을 제거하게 된다. 이와 같은 방식으로 혼합가스에 함유된 이산화탄소를 회수하여 고순도의 이산화탄소를 연속적으로 생산한다. 이산화탄소, 흡수, 암모니아수