Abstract:
The present invention relates to an improved perovskite-based composite oxide catalyst in which a transition metal is dipped in order to improve the selectivity of hydrogen and remarkably decrease the selectivity of methane and carbon monoxide as byproducts. Moreover, the present invention relates to a method for selectively producing hydrogen by means of the C-H decomposition and C-O maintenance of glycerol using the metal oxide catalyst. The improved perovskite-based catalyst (NixMy/LaCexAl1-xO3) in which nickel and a second transition metal are dipped is applied to the reaction of glycerol so as to maintain the high conversion rate of glycerol and the high selectivity and yield of hydrogen. Accordingly, the catalyst can be usefully used as a catalyst for converting glycerol which is generated during a biodiesel process into high value-added hydrogen and as a catalyst for a reaction process of synthesizing high value-added hydrogen.
Abstract:
본 발명은 유사 하이드로탈사이트 담체에 표준주기율표상의 ⅧB족 귀금속 원소가 담지되어 있는 귀금속 촉매, 상기 귀금속 촉매의 제조방법, 그리고 상기 귀금속 촉매를 이용하여 글리세롤의 탈수반응 및 수소첨가 반응에 의해 1,2-프로판디올을 선택적으로 제조하는 방법에 관한 것이다. 본 발명의 귀금속 촉매는 글리세롤의 탈수반응 및 수소첨가 반응에 적용되어 글리세롤의 전환율과 1,2-프로판디올의 선택도 및 수율을 높게 유지하므로, 바이오디젤 공정에서 부생되는 글리세롤을 고부가 가치의 1,2-프로판디올으로 전환하는 공정용 촉매로 유용하다.
Abstract:
The present invention relates to a method for manufacturing a cobalt-based catalyst for Fischer-Tropsch synthesis reaction and, more particularly, to a method for manufacturing a cobalt-based catalyst that is represented by Ir-Co/η-Al_2O_3 manufactured by repeatedly impregnating cobalt and iridium in a spherical eta-alumina support, which has many acid points formed thereon, and drying the impregnated product dozens of times, thus supporting the cobalt and iridium at high density in the support. A catalyst manufactured by the manufacturing method according to the present invention increases the conversion rate of carbon monoxide and the selectivity of liquid hydrocarbon when applied to Fischer-Tropsch synthesis reaction.
Abstract:
PURPOSE: Novel metal modified hydrotalcite catalyst for reforming alcohols and a method for producing hydrogen using the same are provided to expand the life of the catalyst without plenty amount of vapor or oxygen. CONSTITUTION: Novel metal modified hydrotalcite catalyst for reforming alcohols immerses Group VIII elements in nickel-based catalyst in the structure of a modified hydrotalcite containing nickel, magnesium, and aluminum. The catalyst for reforming alcohols is represented by chemical formula 1. In chemical formula 1, A is one of Group VIII elements; x is between 0.1 and 5 inclusively; y is between 0.25 and 1 inclusively; and z is between 2 and 2.75 inclusively. The alcohols are C1 to C6 alcohol, C2 to C6 glycol, glycerol, or the mixture of the same.
Abstract:
PURPOSE: Nickel-based hydrotalcite catalyst for modifying the vapor of diesel, a method for manufacturing the same, and a method for manufacturing hydrogen based on the modification of diesel using the same are provided to improve the yield of hydrogen. CONSTITUTION: Nickel-based hydrotalcite catalyst for modifying the vapor of diesel is represented by chemical formula 1. In chemical formula 1, A is one or more alkali earth metal oxides; B is one or more Group 8B precious metal atoms; a is the content of the alkali earth metal in catalyst and is between 0 and 10 weight%; b is the content of the Group 8B precious metal atoms and is between 0 and 10 weight%; either of the alkali earth metal or the Group 8B precious metal atoms is more than or equal to 0 weight%; and x and y are the molar ratio of Ni and Mg; x is between 0.2 and 0.9; and y is between 0.5 and 5.5.
Abstract:
본 발명은 유사 하이드로탈사이트 담체에 표준주기율표상의 ⅧB족 귀금속 원소가 담지되어 있는 귀금속 촉매, 상기 귀금속 촉매의 제조방법, 그리고 상기 귀금속 촉매를 이용하여 글리세롤의 탈수반응 및 수소첨가 반응에 의해 1,2-프로판디올을 선택적으로 제조하는 방법에 관한 것이다. 본 발명의 귀금속 촉매는 글리세롤의 탈수반응 및 수소첨가 반응에 적용되어 글리세롤의 전환율과 1,2-프로판디올의 선택도 및 수율을 높게 유지하므로, 바이오디젤 공정에서 부생되는 글리세롤을 고부가 가치의 1,2-프로판디올으로 전환하는 공정용 촉매로 유용하다.