Abstract:
본 발명은 알루미나 제어로젤에 담지된 팔라듐 담지 촉매, 그 제조방법 및 상기 촉매를 이용한 숙신산의 수소화반응에 의한 감마 부티로락톤의 제조방법에 관한 것으로, 보다 상세하게는 숙신산으로부터 감마 부티로락톤을 제조하기 위한 담지 촉매에 있어서, 상기 담지촉매는 알루미나 제어로젤(Xerogel) 담체 100중량부에 대하여 Pd 금속촉매가 1 내지 20중량부의 비율로 담지된 것을 특징으로 하는 알루미나 제어로젤(Xerogel) 담체에 담지된 팔라듐 촉매, 그 제조방법 및 상기 촉매를 이용한 숙신산의 수소화반응에 의한 감마 부티로락톤의 제조방법에 관한 것으로, 본 발명의 촉매를 이용하여 액상에서 숙신산(succinic acid), 숙신산무수물(succinic anhydride)의 수소화 반응을 수행하는 경우 기존의 상용 알루미나 담지 촉매보다 높은 감마 부티로락톤의 수율을 달� ��할 수 있으며, 바이오리파이너리 공정에 의해 재생된 숙신산(이하 폐숙신산)을 별도의 정제과정을 거치지 않고도 부티로락톤을 제조할 수 있다. 감마 부티로락톤, 숙신산, 알루미나 제어로젤, 수소화 반응
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
Abstract:
PURPOSE: A palladium catalyst supported on an alumina xerogel support with controlled acidity and a method for preparing γ-butyrolactone based on the hydrogenation of succinic acid using the catalyst are provided to thermo-chemically stabilize a catalytic process by optimally combining the acid characteristic of the support and the hydrogenation activity of palladium. CONSTITUTION: A palladium catalyst supported on an alumina xerogel support with controlled acidity is obtained by gelating an aluminum precursor based on a sol-gel method and implementing a thermal treatment. The average pore size of the palladium catalyst is between 2 and 10nm. The surface area of the palladium catalyst is between 100 and 300m^2/g. The temperature of the thermal treatment is between 700 and 900 degrees Celsius. 1-10 parts by weight of the palladium catalyst is supported by 100 parts by weight of the alumina xerogel support.
Abstract:
PURPOSE: A heteropoly acid support catalyst fixed on a porous spherical carbon containing nitrogen is provided to enhance support amount of the heteropoly acid. CONSTITUTION: A heteropoly acid support catalyst fixed on a porous spherical carbon containing nitrogen is prepared by synthesizing, thermal treating and reducing a carbon precursor containing a nitrogen ingredient with a spherical resin. The catalyst is fixed by reacting a porous spherical carbon with heteropoly acid in a weight ratio of 1 : 0.01-2 in an ion form of amine group and heteropoly acid. The carbon precursor is selected from melamine-formaldehyde resin, polypyrrole, polyanyline and polythiophene.
Abstract:
PURPOSE: A nickel catalyst dipped in a porous zirconia carrier including a metal oxide stabilizer, a producing method thereof, and a hydrogen producing method using thereof are provided to secure the excellent surface area, stability, and the stable catalyst activation of the catalyst. CONSTITUTION: A nickel catalyst dipped in a porous zirconia carrier including a metal oxide stabilizer contains 0.01~0.5mol of metal oxide precursor selected from the group consisting of magnesium, calcium, strontium, barium, scandium, and lanthanum, and 1mol of zirconium precursor. The nickel catalyst uses a surfactant as a template. The nickel catalyst is produced by a hydrothermal polymerization method.
Abstract:
본 발명은 숙신산의 수소화반응에 의한 감마-부티로락톤 제조를 위한 팔라듐-알루미나 복합 촉매, 그 제조방법 및 상기 촉매를 이용한 숙신산의 수소화반응에 의한 감마-부티로락톤 제조방법에 관한 것으로, 보다 상세하게는 알루미나와 팔라듐이 화학적으로 결합하여 Al-O-Pd의 결합구조를 가지며, 알루미나의 총중량을 기준으로 팔라듐 성분의 함량이 1 내지 10중량% 범위이고, 평균기공크기 2nm 내지 10 nm 범위의 중형기공과 100 m 2 /g 내지 400 m 2 /g 의 표면적을 갖는 것을 특징으로 하는 숙신산의 수소화반응에 의한 감마-부티로락톤 제조를 위한 팔라듐-알루미나 복합 촉매, 그 제조방법 및 상기 촉매를 이용한 숙신산의 수소화 반응에 의한 감마-부티로락톤 제조방법에 관한 것으로, 본 발명의 촉매를 이용하여 액상에서 숙신산(succinic acid), 숙신산무수물(succinic anhydride) 또는 폐숙신산의 수소화 반응에 의한 감마 부티로락톤 제조를 수행하는 경우 기존의 감마-부티로락톤의 생산조건보다 온화한 조건에서도 높은 감마 부티로락톤의 수율을 달성할 수 있다.
Abstract:
PURPOSE: A palladium-alumina complex catalyst for manufacturing gamma-butyrolactone based on the hydrogenation of succinic acid, a method for manufacturing the same, a method for manufacturing the gamma-butyrolactone using the catalyst are provided to use waste succinic acid as environmentally-friendly materials replacing maleic anhydride. CONSTITUTION: A palladium-alumina complex catalyst for manufacturing gamma-butyrolactone based on the hydrogenation of succinic acid includes an Al-O-Pd structure based on the chemical bond of alumina and palladium. In the complex catalyst, the content of palladium is 1 to 10 weight% of the total weight of alumina. The average pore size of the complex catalyst is between 2nm and 10nm. The surface area of the complex catalyst is between 10m^2/g and 400m^2/g. A method for manufacturing the complex catalyst includes the following: An aluminum precursor is dissolved, water and hydration synthetic catalyst are added to form alumina sol; a palladium precursor alcohol solution is added into the alumina sol to synthesize alumina-palladium complex sol; the alumina-palladium complex sol is cooled, and water is added into the cooled complex sol to obtain palladium-alumina complex gel; and the complex gel is aged, dried, and plasticized.
Abstract:
PURPOSE: Palladium catalyst carried in alumina xerogel, a method for preparing the same, a method for preparing gama-butyrolactone based on the hydrogenation reaction of succinic acid using the catalyst are provided to obtain the catalyst using an alumina xerogel carrier with the superior chemical stability and durability. CONSTITUTION: A method for preparing palladium catalyst in alumina xerogel includes the following: 1-20 parts by weight of palladium catalyst is carried in 100 parts by weight of alumina xerogel. An aluminum precursor is dissolved in an alcohol solvent. The aluminum precursor forms a sol by implementing a partial hydrating process and a condensing process using the mixed solution of water, acid, and the alcohol solvent. The sol is additionally hydrated and condensed to be gel. The gel is aged and dried to obtain an alumina xerogel carrier. The alumina xerogel carrier is thermally processed and carrying the palladium catalyst. The palladium catalyst carried in the alumina xerogel carrier is dried and thermally processed.