Abstract:
PURPOSE: Ficher-Tropsch catalysts for direct production of light olefins from syngas and a preparation method thereof are provided to improve stability and yield of the catalyst, and to increase a carbon monoxide conversion rate. CONSTITUTION: A manufacturing method of iron-based Ficher-Tropsch catalysts includes the following steps of: dissolving ethylene glycol in citric acid; removing water completely included in liquid by heating a mixed solution after agitating a compound and adding a calcium precursor aqueous solution in the citric acid and ethylene glycol liquid; gaining a calcium oxide supporter by sintering the compound in which the water is removed; and impregnating a metal precursor to the calcium oxide supporter. The catalyst further includes a step for sintering the manufactured catalyst at a temperature of 300 ~ 700 °C.
Abstract:
PURPOSE: An iron-based catalyst for Fischer-Tropsch synthesis and a manufacturing method thereof are provided to increase catalyst stability with good selectivity of liquid hydrocarbon and activation, and to offer a high conversion rate of carbon monoxide. CONSTITUTION: A manufacturing method of an iron-based catalyst for Fischer-Tropsch synthesis includes a step for producing nano particles including iron-based catalyst components, and a step for producing a catalyst by supporting the nano-particles on a catalyst supporter. The iron-based catalyst components have activity on reaction of the Fischer-Tropsch.
Abstract:
Cobalt/zirconium-phosphorus/silica catalysts for Fischer-Tropsch synthesis and a preparation method thereof are provided to offer improved dispersibility and reducing property of cobalt and active components stably. A preparation method of a cobalt/zirconium-phosphorus/silica catalyst includes the following steps of: dipping a zirconium precursor and a phosphorus precursor in porous silica of which specific surface area is in a range of 200 ~ 800 m^2 / g; drying the porous silica in which a precursor is dipped in temperature of 100 ~200 °C; producing a zirconium - phosphorus/silica by firing the dried phosphorus silica; drying the dipped zirconium - phosphorus / silica support in 100 ~ 200 °C; and producing the cobalt/zirconium-phosphorus/silica catalyst by plasticizing the dried zirconium - phosphorus/silica support.
Abstract:
A manufacturing method of cobalt/phosphorus-alumina catalyst for Fischer-Tropsch synthesis is provided to secure stable selectivity to a liquid hydrocarbon more than C5 and to develop a competitive GTL process. A manufacturing method of cobalt/phosphorus-alumina catalyst for Fischer-Tropsch synthesis comprises steps of: mixing aluminium alcoholate with alcoholometer organic solvent and manufacturing aluminium alcoxide solution; mixing organic carboxylic acid 0.01 ~ 1 molar ratio and the water 2 ~ 12 molar ratio into the aluminium alcoxide solution, including a precursor and manufacturing boehmite sol in which the phosphorus is comprised; distilling and drying the boehmite sol in which the phosphorus is comprised and separating and collecting alcohol and manufacturing the boehmite in which powdered phosphorus is comprised; plasticizing the powdered boehmite and manufacturing a phosphorus-alumina support; dipping a cobalt precursor into the phosphorus-alumina support; and manufacturing the cobalt/phosphorus-alumina catalyst.
Abstract:
A method for preparing colloidal oil-soluble iron oxide nano-particle with high dispersity and stability is provided to improve dispersity of the particle in organic solvent and to employ the particle in magnetic recording medium, printer ink, paint additive, ferrofluild, etc. by preparing iron hydroxide slurry and capping surface of the slurry in fatty acid and petroleum solvent to form the nano-particle. The method includes the steps of: preparing iron hydroxide by reacting iron precursor compound with basic compound containing alkaline metal, alkaline earth metal or ammonium cations to form microfine iron hydroxide, precipitating and washing the product; preparing amorphous colloidal iron hydroxide nano-particles by blending the washed product with C10 to C30 fatty acid and petroleum solvent; and preparing iron oxide nano-particles after separating the colloidal iron hydroxide nano-particles into water phase and organic phase, removing the water phase and water content from the organic phase.
Abstract:
본 발명에 따른 금속 나노입자 및 이의 제조방법은 탄수화물과 폴리카복실산을 폼 형성제로 사용함으로서, 충분한 부피를 가지는 폼 형태인 금속 함유 고분자 폼을 형성한다. 상기 고분자 폼에 의해 금속 성분들이 충분한 거리를 두고 분산되기 때문에 소성시 소결이 억제되어, 제조된 금속산화물 입자는 입자크기가 나노스케일로 작으며, 성분들이 균일하게 분산되어 있다. 따라서, 상기 금속 나노입자가 촉매인 경우 그 활성이 우수하며, 본 발명의 제조방법에 따라 제조된 촉매를 천연가스 개질반응에 사용하는 경우 높은 촉매 활성 및 내코크성을 가진다.
Abstract:
본 발명은 수불용성 제1 금속 함유 지지체를 준비하는 제1단계; 제1 금속을 용해시킬 수 있는 제2 금속 함유 촉매 전구체 수용액을 준비하는 제2단계; 제2 금속 함유 촉매 전구체 수용액에 제1 금속 함유 지지체를 첨가하여, 제1 금속 함유 지지체 표면 중 제1 금속 이온이 용해되면서, 용해된 제1 금속 자리에 제2 금속 이온이 치환되는 제3단계; 수용액에 용해되어 나온 제1 금속 이온을 제거하는 제4단계; 및 전 단계 생성물을 건조 및 소성하는 제5단계를 포함하여, 제2 금속 함유 촉매 성분이 지지체 표면 상에 코팅된 촉매를 제조하는 방법을 제공한다. 본 발명에 따라 제조된 촉매는 촉매성분이 촉매 증진제와 긴밀히 접촉하기 때문에 촉매의 분산도가 뛰어나고 증진제와 효과적으로 결합할 수 있어 촉매 특성이 뛰어나며, 특히 이 촉매는 탄화수소의 개질에 의해 합성가스를 제조하는 반응에 효과적이다. 또한, 우수한 내 코크성을 갖는다.
Abstract:
본 발명은 천연가스의 혼합개질용 촉매, 이의 제조방법 및 상기 촉매를 이용한 천연가스의 혼합개질방법에 관한 것으로서, 좀더 상세하게는 알루미나 촉매 지지체의 표면을 마그네슘 화합물로 수식하여 마그네슘 알루미네이트의 스피넬 구조를 갖게 하고, 이 지지체에 촉매 활성 성분으로서 니켈(Ni)을, 촉매 증진제로서 귀금속(PM)과 칼슘(Ca)을 담지하며, 니켈과 칼슘의 일부는 지지체와 고온에서 반응하여 부분적으로 스피넬 구조를 갖게 함으로써, 코크 생성에 대하여 우수한 내구성과 높은 촉매 활성을 지니게 되어 반응성 및 안정성이 우수한 천연가스의 혼합개질용 촉매, 이의 제조방법 및 상기 촉매를 이용한 천연가스의 혼합개질방법에 관한 것이다.