Abstract:
본 발명은 고정층 반응기에 두 종의 촉매가 충진되고, 두 촉매 층이 물리적으로 섞이지 않도록 설계한 연속 흐름식 2중 촉매 반응 장치를 이용하여 노르말-부텐의 산화적 탈수소화 반응에 의해 1,3-부타디엔을 제조하는 방법에 관한 것이다. 좀 더 구체적으로는, 노르말-부텐의 이성질체(1-부텐, 트랜스-2-부텐, 시스-2-부텐)들의 산화적 탈수소화 반응에 대해 활성이 다른 다성분계 비스무스 몰리브데이트 계 촉매와 페라이트 계 촉매를 사용한 연속 흐름식 2중 촉매 반응 장치를 이용하여 노르말-부텐과 노르말-부탄이 포함된 C4 혼합물을 반응물로 사용하여 노르말-부텐의 산화적 탈수소화 반응을 통해 1,3-부타디엔을 제조할 수 있는 방법에 관한 것이다.
Abstract:
PURPOSE: A nickel catalyst supported on porous yttria stabilized zirconia, a preparation method thereof, and a method for producing hydrogen through autothermal reforming are provided to obtain excellent carrier properties by modifying unstable zirconia into a stable porous material having a wide surface area and to solve deactivation problems due to sintering and carbon deposition. CONSTITUTION: A method for preparing a nickel catalyst supported on porous yttria stabilized zirconia comprises the following steps: manufacturing an yttrium precursor mixture solution by dissolving a surfactant, which is a templated material, and dispersing 0.01-1 mol of the yttrium precursor on a mixture comprising micelles based on 1 mole of a zirconium precursor; mixing a zirconium precursor solution with the yttrium precursor mixture solution and gelating the mixture by hydrating and condensing the zirconium precursor and the yttrium precursor; hydrothermally synthesizing the gelled material and fermenting the gelled material; manufacturing the porous yttria stabilized zirconia by removing the templated material; dipping the nickel by mixing the porous yttria stabilized zirconia carrier and a nickel precursor solution to dip 1-50 parts by weight of nickel on 100 parts by weight of the carrier; and drying and thermally processing the dipped catalyst.
Abstract:
PURPOSE: Sulfated zinc ferrite catalyst, method for preparing the same, a method for preparing 1,3-butadiene using the catalyst are provided to improve the yield of an 1,3-butadiene preparing process regardless of the content of a C4 mixture including normal butane and normal butene. CONSTITUTION: Single phase zinc ferrite is impregnated into a sulfate aqueous solution which is represented by chemical formula, M_2SO_4 or M_2S_2O8. M is H or NH_4. The surface of the zinc ferrite is sulfated. A filtering process and a drying process are followed. Sulfated zinc ferrite catalyst is obtained. A C4 mixture is prepared as the reactant of an 1,3-butadiene preparing process under the sulfated zinc ferrite catalyst. Air and steam are applied to the C4 mixture and the sulfated zinc ferrite catalyst. The C4 mixture includes normal-butane and normal-butene.
Abstract:
본 발명은 다성분계 비스무스 몰리브데이트 촉매, 그 제조방법 및 상기 촉매를 이용한 1,3-부타디엔 제조방법에 관한 것으로, 보다 상세하게는 산화적 탈수소화 반응에 의해 노르말-부탄 및 노르말-부텐을 포함하는 C4 혼합물로부터 1,3-부타디엔을 제조하는데 사용되고 비스무스 및 몰리브덴 성분을 필수적으로 포함하는 다성분계 비스무스 몰리브데이트 촉매에 있어서, 상기 다성분계 비스무스 몰리브데이트 촉매는 2가 또는 3가 양이온을 갖는 금속 성분을 적어도 하나 이상 더 포함하며, 시트르산 존재하에 졸-겔법에 의해 제조된 것을 특징으로 하는 다성분계 비스무스 몰리브데이트 촉매, 그 제조방법 및 상기 촉매를 이용한 1,3-부타디엔 제조방법에 관한 것이다. 본 발명의 촉매는 별도의 노르말-부탄 분리공정이나 노르말-부텐 추출공정 없이 많은 불순물이 포함되어 있는 C4 유분을 반응물로 직접 사용하여 높은 수율로 1,3-부타디엔을 얻을 수 있다. 다성분계 비스무스 몰리브데이트, 시트르산, 졸-겔법, 1,3-부타디엔, 산화적 탈수소화 반응, C4 라피네이트, C4 혼합물
Abstract:
PURPOSE: A producing method of a biuret is provided to effectively improve the yield of the biuret, to minimize the generation of by-products, and to increase the reaction activity by adding a catalyst. CONSTITUTION: A producing method of a biuret using a catalyst comprises the following steps: melting a urea in a reactor; and adding a catalyst to the reactor and reacting. The catalyst is selected from the group consisting of a zeolite catalyst, a heteropolyacid catalyst, an organic basic catalyst, a metallic oxide catalyst, a mixed catalyst with the metallic oxide catalyst and an alumina, an organic acid catalyst, and their mixture. The zeolite catalyst is selected from the group consisting beta zeolite, mordenite, and ZSM-5.
Abstract:
PURPOSE: A nickel catalyst carried on a meso-porous alumina carrier, a manufacturing method thereof, and a manufacturing method of hydrogen gas by a steam reformation of LNG are provided to obtain a stable catalyst activation during a steam reforming reaction of the LNG. CONSTITUTION: A nickel catalyst is carried on a meso-porous alumina carrier produced by a block copolymer as a molding material. 1~50 parts by weight of nickel is carried to 100 parts by weight of the meso-porous alumina carrier. The block copolymer is selected from the group consisting of pluronic based or tetronic based block copolymer including F108, F98, F88, P123, P105 and P104. The manufacturing method comprises the following steps: forming a micelle by melting the block copolymer to an alcohol solution; mixing an aluminum precursor to the alcohol solution; obtaining alumina gel by injecting moisture to the solution; obtaining the meso-porous alumina carrier by washing, drying, and heat-treating the gel; and impregnating the nickel before drying and heat-treating.
Abstract:
PURPOSE: A mesoporous nickel-alumina co-precipitated catalyst is provided to obtain high conversion ratio of liquefied natural gas and hydrogen gas in a steam reforming reaction of the liquefied natural gas without deactivation for a long term and to obtain excellent catalyst activity and stability. CONSTITUTION: A method for preparing a mesoporous nickel-alumina co-precipitated catalyst comprises the following steps: manufacturing a solution including an aluminum precursor and a nickel precursor; manufacturing a nickel-aluminum composite slurry by putting nickel and aluminum to an alkali solution having pH 7 ~ 10 at 0.001 - 0.1 mole/hr and co-precipitating the solution; obtaining nickel-aluminum composite powder through washing, filtering, and drying processes after fermenting the nickel-aluminum composite slurry; and plasticizing the nickel-aluminum composite powder.
Abstract:
본 발명은 블록 공중합체를 주형물질로 사용하여 제조된 중형기공성 알루미나 담체에 담지된 니켈 촉매, 그 제조방법 및 상기 촉매를 이용하여 액화천연가스(LNG)의 수증기 개질반응에 의해 수소가스를 제조하는 방법에 관한 것으로, 본 발명에 따르면 니켈 촉매를 블록 공중합체(Block Copolymer)를 주형으로 사용하여 제조된 중형기공성 알루미나에 담지시킬 경우 촉매의 탄소침적 및 소결에 의한 비활성화에 대한 저항력이 증가하여 장시간 동안 효율적이고 안정적인 운전이 가능하다. 또한, 본 발명의 촉매를 수증기 개질반응기의 촉매층에 충진시킨 후 액화천연가스(LNG)를 반응기 내 촉매층을 통과시킴으로서 효율적으로 수소가스를 제조할 수 있다. 알루미나, 블록 공중합체(Block Copolymer), 니켈 촉매, 수소가스, 액화천연가스(LNG), 수증기 개질반응