Abstract:
PURPOSE: A nickel catalyst and a manufacturing method thereof are provided to offer very stable catalytic activity for a long time, and to manufacture hydrogen gas of high concentration by ethanol autothermal reforming reaction. CONSTITUTION: A nickel catalyst supported on mesoporous zirconia is used for manufacturing hydrogen by autothermal reforming reaction of ethanol. The catalyst uses a block copolymer or a cationic surfactant as a mold. In the catalyst, the nickel of 1 ~ 50 weight parts is supported on a zirconia carrier of 100 weight parts. The zirconia carrier having a mesopore is manufactured by a thermo-polymerization method.
Abstract:
Nickel catalyst dipped on zirconia-titania complex metal oxides, a manufacturing method thereof, and a production method of hydrogen with autothermal reforming of ethanol using the catalyst are provided to offer excellent durability for a long time with high activation of the zirconia-titania complex metal oxides. Nickel catalyst dipped on zirconia-titania complex metal oxides is used for manufacturing hydrogen by autothermal reforming reaction of ethanol. The zirconia-titania complex metal oxides are manufactured by condensing and hydration of titanium or zirconium. The catalyst is represented by a chemical formula, Ni/ZraTibO2(0=0.2). This chemical formula is made by dipping the nickel metal with a ratio of 1 ~ 50 parts by weight based on the zirconia-titania complex metal oxides precursor 100 parts by weight.
Abstract:
A method for manufacturing dimethoxymethane is provided to increase the production of dimethoxymethane due to the property of acid existing within a catalyst and to improve the oxidation reaction property in the methanol transformation reaction, compared with a unsupported catalyst by introducing a cation functional group to the mesopore carbon containing nitrogen and using a heteropolyacid catalyst. A method for manufacturing dimethoxymethane comprises a step for passing through the intermediate of dimethoxymethane by an acid-catalyzed reaction and a consecutive oxidation reaction of methanol or producing formaldehyde by the direct oxidation reaction of methanol; a step for preparing methoxymethanol by the acid catalytic reaction between the formaldehyde and methanol; a step for preparing dimethoxymethane by the acid catalytic reaction between methoxymethanol and methanol. In the chemical reaction, the heteropolyacid catalyst which can perform a Bi-functional catalyst of the acid catalytic reaction and oxidation reaction at the same time is used. The heteropolyacid catalyst is fixed to a mesopore carbon containing nitrogen having the average pore size of 2-50nm.
Abstract:
A catalyst used in autothermal reforming of ethanol, which has a high selectivity by reducing side reactions, and of which durability and activity are less deteriorated even during the long term use of the catalyst, is provided, a method for preparing a Ni-Zr-Ti-O composite metal oxide catalyst more simply by an one-step sol-gel process is provided, and a method for producing hydrogen gas with a high concentration by applying the Ni-Zr-Ti-O composite metal oxide catalyst to autothermal reforming of ethanol is provided. In a catalyst used in the production of hydrogen by autothermal steam reforming of ethanol, a Ni-Zr-Ti-O composite metal oxide catalyst is prepared by hydrating and condensing at least two metal precursors essentially comprising the Ni precursor selected from the group consisting of Ti, Zr and Ni precursors, and is represented by the formula Ni5ZrxTi5-xO, where x ranges from 0 to 5. The Ni-Zr-Ti-O composite metal oxide catalyst has a Zr/Ti mole ratio of x/5-x, where x ranges from 0 to 5, and a Ni/(Zr+Ti) mole ratio of 0.1 to 5. A preparation method of a Ni-Zr-Ti-O composite metal oxide catalyst represented by the formula Ni5ZrxTi5-xO, where x ranges from 0 to 5, comprises the steps of: (i) dissolving at least two metal precursors essentially comprising the Ni precursor selected from the group consisting of Ti, Zr and Ni precursors into a hydrophilic solvent to prepare a metal precursor solution; (ii) simultaneously hydrating and condensing the metal precursor solution to gelate the Ni-Zr-Ti-O composite metal oxide catalyst; and (iii) drying and firing the gelated Ni-Zr-Ti-O composite metal oxide catalyst.
Abstract:
본 발명은 양이온 계면활성제를 주형물질로 사용하여 수열합성법(Hydrothermal Method)에 의해 제조된 중형기공 알루미나 담체에 담지된 니켈촉매, 그 제조방법 및 이를 이용하여 액화천연가스(LNG)의 수증기 개질반응에 의해 수소를 제조하는 방법에 관한 것이다. 본 발명은 촉매의 탄소침적 및 소결에 의한 비활성화에 대한 저항력을 증대시켜 장시간 동안 효율적이고 안정적인 운전이 가능하여 액화천연가스(LNG)의 수증기 개질반응에 의한 수소제조에 매우 효율적인 촉매를 제공한다. 중형기공 알루미나, 양이온 계면활성제, 니켈, 촉매, 수소가스, 액화천연가스(LNG), 수증기개질반응
Abstract:
A nickel catalyst, a manufacturing method thereof, and a method for producing hydrogen by autothermal reforming of ethanol using the catalyst are provided to offer stability at high temperature, and to prevent a sintering phenomenon of nickel particles. The nickel is supported on mesoporous zirconia-ceria mixed metal oxides. The nickel is used for hydrogen production by autothermal reforming of ethanol. The nickel of 1 ~ 50 parts by weight is supported on the mesoporous zirconia-ceria mixed metal oxides 100 parts by weight. The mesoporous zirconia-ceria mixed metal oxides uses a block copolymer or a cationic surfactant. A zirconium precursor or a cerium precursor is manufactured by a sol-gel method after performing a condensing and hydrating process.
Abstract:
A heteropoly acid catalyst immobilized onto nitrogen-containing mesoporous carbon is provided to form a cationic functional group in mesoporous carbon simply and efficiently as compared with a conventional method, a preparation method the catalyst is provided, and a preparation method of methacrylic acid using the catalyst is provided to maximize production of methacrylic acid by maximizing a surface type oxidation reaction of the heteropoly acid catalyst in the conversion reaction of methacrolein using the heteropoly acid catalyst. A heteropoly acid catalyst immobilized onto nitrogen-containing mesoporous carbon is characterized in that: the heteropoly acid catalyst is used in an acid catalytic reaction or an oxidation reduction catalytic reaction; and the heteropoly acid catalyst is immobilized onto the nitrogen-containing mesoporous carbon through chemical bonding by hydrogenating nitrogen-containing mesoporous carbon having an average pore size ranging from 2 to 1000 nm to convert the nitrogen into an amine group(-NR1R2R3^+) and by reacting the amine group with a heteropoly acid catalyst, wherein R1, R2 and R3, each independently is hydrogen or an alkyl group having 1 to 20 carbon atoms. The nitrogen-containing mesoporous carbon is prepared by using carbon molecular sieve as a porous carbonaceous material and using spherical or nano-structured silica or nano-structured inorganic compound as a template.
Abstract:
A nickel catalyst, a method for manufacturing the catalyst, and a method for preparing hydrogen using the catalyst are provided to improve the activity of the catalyst in a steam reforming reaction of liquefied natural gas, by supporting the nickel catalyst on a silica-zirconia complex oxide carrier prepared through a grafting method. A catalyst supporting nickel is used to produce hydrogen by a steam reforming reaction of liquefied natural gas. The catalyst is supported on a silica-zirconia complex oxide carrier, which is obtained by grafting zirconia on a surface of silica. The content of zirconia grafted on the silica-zirconia complex oxide carrier is in a range of 0.5-90 wt% based on the weight of the silica. The content of nickel supported on the silica-zirconia complex oxide carrier is in a range of 0.5-50 wt% based on the total weight of the silica-zirconia complex oxide carrier.
Abstract:
A method for preparing hydrogen is provided to produce the hydrogen efficiently through a steam reforming reaction of LNG(Liquefied Natural Gas), by using a metal catalyst supported on an alumina Xerogel carrier. At least one metal catalyst, which is selected from a group consisting of Pt, Au, Pd, Rh, La, Ce, Yb, Ni, Cu, Ag, Ru, Ir, Os, Co, V, Fe, Sn, Ca, and Mg, is supported on an alumina Xerogel carrier. The metal catalyst contains a weight percent of 1-50 wt%, based on 100 wt% of the alumina Xerogel carrier. Steam and LNG containing methane gas and ethane gas are flown at a space rate of 2,000-30,000 ml/h.g-catalyst, within the metal catalyst. Further, a mixing volume rate of the LNG/the steam is 1 to 10, and a mixing volume rate of the methane gas/the ethane gas is 9 to 99.9.