Abstract:
PURPOSE: A continuous carbon dioxide collecting method for minimizing regeneration energy is provided to supply a carbon dioxide absorbent with a composition which minimizes salt generation. CONSTITUTION: A method for removing carbon dioxide includes: a step for bringing gas containing carbon dioxide into contact with a carbon dioxide absorbent in which a sterically hindered cyclic amine is added into alkali carbonate(S110); a step for absorbing carbon dioxide from the gas(S120); a step for separating salts from the absorbent(S130); and a step for regenerating the absorbent(S140). The salt separating process uses a decanter. The absorbent includes 20 wt% or less of the alkali carbonate and 10 wt% or less of the sterically hindered cyclic amine. The alkali carbonate is at least one selected from a group including potassium carbonate(K_2CO_3), sodium carbonate(Na_2CO_3), sodium hydroxide(NaOH), potassium hydroxide(KOH), potassium bicarbonate(KHCO_3), and sodium bicarbonate(NaHCO_3). [Reference numerals] (S110) Gas contacting step; (S120) Carbon dioxide absorbing step; (S130) Salt separating step; (S140) Absorbent regenerating step
Abstract:
PURPOSE: A method for preparing phenolate ionic liquid used as a carbon dioxide absorbent is provided to improve carbon dioxide absorbing ability and speed and to lower production cost. CONSTITUTION: A method for preparing phenolate ionic liquid is prepared by synthesizing an imidazolium cation and a phenolate anion. The imidazolium cation is (bmim)(1-butyl-3-methylimidazolium), (emim)(1-ethyl-3-methyimidazolium), or (hmim)(1-hexyl-3-methyimidazolium). A method for preparing the phenolate ionic liquid comprises: a step of mixing (imidazolium cation)Cl and Na-phenolate with methanol and stirring; and a step of removing NaCl and unreacted materials. [Reference numerals] (AA) Process of drying [imidazolium-based cation]Cl and Na-phenolate which are starting substances; (BB) Process of mixing and stirring methanol into each of two starting substances; (CC) Process of mixing and synthesizing two starting substances; (DD) Process of removing impurities; (EE) Solvent removing step; (FF) Washing step; (GG) Filtering step; (HH) Column filtering step
Abstract:
A ceramic fiber supporter and a method for preparing the same are provided to improve the efficiency in separation of carbon dioxide during a decarbonating process before combustion. A carbon dioxide adsorbent and a catalyst are immersed in a sheet type of ceramic fiber supporter. The ceramic fiber supporter includes an inorganic binder, an organic binder, and pulp. The carbon dioxide adsorbent is one or more selected from calcium carbonate, potassium carbonate, sodium carbonate, magnesium carbonate, silicate iridium, and iridium carbonate. The catalyst is one or more selected from nickel, rhodium, and platinum. The inorganic binder is one or more selected from silica sol, bentonite, clay, mica, kaolin and montmorillonite. The organic binder is one or more selected from polyvinyl alcohol, gelatin and methylcellulose.
Abstract:
본 발명은 화석연료를 이용하여 메탄을 생산한 후, 수증기개질반응을 통한 수소를 생산하는 과정 중 생성된 이산화탄소를 분리하는 공정을 포함하는 연소전 탈탄소화방법에 관한 것으로, 3개의 반응기 RA, RB, RC로 구성되어 물(H 2 O)과 메탄(CH 4 )이 유입되어 이산화탄소(CO 2 )와 수소(H 2 )를 배출하는 과정에서 이산화탄소를 제거하는 연소전 탈탄소화방법에 있어서, (스텝1) RA는 혼성반응과정, RB는 온도조절과정, RC는 탈착과정; (스텝2) RA는 탈착과정, RB는 혼성반응과정, RC는 온도조절과정; 및 (스텝3) RA는 온도조절과정, RB는 탈착과정, RC는 혼성반응과정;을 포함하는 공정사이클로 구성되고, 상기의 혼성반응과정은 메탄과 물을 이용한 수증기개질반응과 흡착제를 이용하여 상기 수증기개질반응에서 생성된 이산화탄소를 흡착하는 흡착반응이 동시에 수행되도록 온도를 유지하는 과정이며, 상기 온도조절과정은 흡착제에 흡착된 이산화탄소를 탈착시키고 혼성반응으로 넘어가기 위하여 온도를 낮추는 과정이고, 상기 탈착과정은, 흡착제에 흡착된 이산화탄소를 탈착하기 위하여 온도를 탈착온도까지 높이는 과정인 것을 특징으로 하는 연소전 탈탄소화 방법이다. 흡착제, 이산화탄소, 탈탄소
Abstract:
본 발명은 CO 2 를 선택적으로 흡수하는 전달반응기와, CO 2 를 잡고있는 고체입자가 CO 2 를 놓아주면서 원래의 상태로 재생되는 재생반응기로 구성된 CO 2 분리회수장치에 관한 것으로, 외부로부터 공급된 CO 2 함유가스(11)가 건식고체흡수제와 접촉하여 CO 2 를 회수하는 회수반응기(1); 상기 회수반응기(1)와 연결되어 기체는 배출시키고 CO 2 를 함유하고 있는 고체만 분리하는 사이클론1(3a); 상기 사이클론1(3a)과 연결된 루프실(5)을 포함하는 고체이송파이프(7)를 통해 CO 2 를 함유하고 있는 고체를 공급받아 유동화가스(8)를 이용하여 CO 2 와 건식고체흡수제로 분리하고, 분리된 건식고체흡수제를 이송수단을 통해 다시 회수반응기(1)로 보내는 재생용 유동층반응기(2); 및 상기 재생용 유동층반응기(2)에서 분리된 CO 2 를 외부로 저장 또는 이용할 수 있도록 하는 CO 2 분리회수장치이다.
Abstract:
PURPOSE: A method for preparing barium titanate powder is provided to prepare barium titanate powder having high purity, small particle size and uniform particle size distribution from primary barium titanate powder prepared using starting materials of titanium contained hydroxide and barium contained hydroxide obtained by sulfuric acid process. CONSTITUTION: The method comprises a process of dehydration reacting a mixed solution of barium obtained from sulfuric acid process and titanium contained hydroxide at a temperature of 100 to 400 deg.C under a reaction pressure of atmospheric pressure to 20 kg/cm¬2; and a process of calcining the pH adjusted primary barium titanate powder after adjusting pH of the first barium titanate from 9 to 13 by washing primary barium titanate powder prepared by the dehydration reaction using acid solution or purified water, and wherein the calcination is performed in the temperature range of 800 to 1300 deg.C.
Abstract translation:目的:提供一种制备钛酸钡粉末的方法,以制备使用由含钛的氢氧化物和含硫酸钡的硫酸制得的含氢氧化物制备的原始钛酸钡粉末,其纯度高,粒度小,粒度分布均匀的钛酸钡粉末 。 方案:该方法包括在大气压至20kg / cm 2的反应压力下,将从硫酸法得到的钡的混合溶液与含钛的氢氧化物在100〜400℃的温度下脱水反应的方法; 以及通过使用酸溶液或纯化水洗涤通过脱水反应制备的一次钛酸钡粉末,将第一钛酸钡的pH调节为9〜13后,对pH调整了的初级钛酸钡粉末进行煅烧,其中,在 温度范围800〜1300℃。
Abstract:
PURPOSE: Provided are a method and a device which substantially increase a reaction rate of hydrolysis using a supercritical water and improve the yield of hydrolysis. CONSTITUTION: The method comprises the steps of (i) heating and pressurizing a raw water containing a small amount of sulfuric acid or sulfate in a heating part(4), (ii) providing the raw water to reactor(8) together with cellulose slurry provided by the slurry pump(10) to effect a hydrolysis, (ii) terminating a reaction by firstly cooling the reactants discharged from the reactor(8) with cooling water provided from cooling water tank(12), (iii) completely terminating a reaction by secondarily cooling the reactants by heat exchanger(13), (iv) passing the reaction product to filter unit(14) to filter an unreacted cellulose, while the filtrate being obtained from a product collecting tank.
Abstract:
PURPOSE: A continuous preparation method of barium hexaferrite(BaO·6Fe2O3) powders by supercritical water crystallization is provided, which is characterized in that each step of hydrolysis, formation of critical nuclei, dehydration is performed in sequence. Accordingly the resultant barium hexaferrite powders are homogeneous and fine. CONSTITUTION: The preparation method is as follows: (i) hydrolyzing a mixed solution, being obtained from mixing a nitrate solution containing Fe and Ba and an alkali solution(KOH or NaOH) at a mixing point(MP1), at room temperature under 30-50MPa of pressure, which is represented by the formula, M(NO3)x(s) + xH2O(l) --> M(OH)x(l) + xHNO3(l) where M is metal, s is solid and l is liquid; (ii) forming critical nuclei by reacting a mixture, being obtained from mixing hydrolyzed raw materials (M(OH)x) and heated water at MP2, at 100-400deg.C for 3-10sec.; (iii) dehydrating a product in a reactor after heating hydrolyzed materials to 300-500deg.C of supercritical temperature for water rapidly at MP3 by using a hot water, where the size of formed particles is controlled by an angle of the reactor; (iv) recovering formed powder in a cyclone and washing.
Abstract:
The present invention relates to a refining method for using waste lubricant as fuel by using a liquified ammonium solution. The ammomium solution is manufactured by pre-eliminating impurities (gypsum, etc) except nitrogen and phosphorous component from composite fertilizers not containing potassium by adding water.
Abstract:
Disclosed are an imidazolium-based ionic liquid functionalized with an amine and a method for a separation of carbon dioxide using the same. The imidazolium-based ionic liquid functionalized with the amine according to the present invention has a superior carbon dioxide absorption capacity. The absorbed carbon dioxide can be easily absorbed/desorbed by heating. The liquid of the present invention provides use convenience and can be effectively used in collecting CO2 since the liquid has a selectivity, a thermal stability, a repeatable usability, and a long lifespan.