Abstract:
A mesoporous alumina-ceria composite catalyst supported with copper oxide by using copper oxide as an active material, and utilizing ceria for improving activity of an oxidation reaction and alumina for increasing structural stability of ceria is provided, and a method for selectively oxidizing carbon monoxide using the alumina-ceria composite catalyst supported with copper oxide is provided. A preparation method of a copper oxide-supported alumina-ceria composite catalyst comprises the steps of: (a) mixing an alumina precursor, a ceria precursor, and a copper oxide precursor with a mixed solvent of a surfactant and alcohol to form a micelle; (b) adding water into the solution obtained in the step(a) and agitating a mixture of water and the solution to subject the mixture to a hydrolysis reaction and a condensation reaction; and (c) drying a resulting material of the step(b) and heat-treating the dried resulting material at 350 to 550 deg.C.
Abstract:
본 발명은 액화천연가스의 수증기 개질반응에 의한 수소가스 제조용 담지 촉매, 그 제조방법 및 상기 담지 촉매를 이용한 수소가스 제조방법에 관한 것으로서, 더욱 구체적으로는, 알루미나 및 상기 알루미나의 표면에 그래프팅 (grafting)된 지르코니아를 포함하는 알루미나-지르코니아 복합산화물 담체; 및 상기 복합산화물 담체에 담지된 촉매 금속을 포함하는 액화천연가스의 수증기 개질반응에 의한 수소가스 제조용 담지 촉매, 그 제조방법 및 상기 담지 촉매를 이용한 수소가스 제조방법에 관한 것이다. 본 발명에 따르면, 순수한 메탄의 수증기 개질반응보다는, 비교적 저렴한 메탄과 에탄의 혼합가스로 이루어진 액화천연가스의 수증기 개질 반응에 의해 수소 가스를 제조할 수 있다. 또한, 높은 반응 활성을 나타낼 뿐만 아니라, 종래의 고활성 귀금속 촉매에 비해서 저렴한 제조비용에 의해서 제조가능하며, 그 구성성분 및 합성경로가 간단하여 재현성이 매우 우수한 액화천연가스의 수증기 개질반응에 의한 수소가스 제조용 담지 촉매, 그 제조방법 및 상기 담지 촉매를 이용한 수소가스 제조방법을 제공할 수 있다. 알루미나-지르코니아 복합산화물, 그래프팅법 (grafting mathod), 담지 촉 매, 액화천연가스, 수증기 개질반응, 수소 제조
Abstract:
Nickel catalysts dipped in alumina-zirconia oxide complex carrier in which zirconia is highly dispersed is provided to manufacture hydrogen gas by performing a reforming reaction of steam of liquefied natural gas. A method for manufacturing nickel catalysts dipped in alumina-zirconia oxide complex carrier in which zirconia is highly dispersed comprises the following steps of: activating a hydroxyl(OH) group on a alumina surface by adding a base catalyst in a alumina-dispersed organic solvent; obtaining a chelated zirconium precursor by using a chelating agent; grafting and reacting a solution by adding the chelated zirconium precursor; obtaining slurry; inducing a hydration and a condensation reaction of the zirconium precursor; drying the solution; obtaining the alumina - zirconia complex oxide carrier building after heating a material; dipping the nickel; drying an outcome; and gaining a nickel catalyst.
Abstract:
A supported catalyst for producing hydrogen gas, a method for preparing the supported catalyst, and a method for producing the hydrogen gas using the supported catalyst are provided to produce the hydrogen gas by a steam reforming reaction of low-priced liquefied natural gas. A supported catalyst for producing hydrogen gas comprises an alumina-zirconia complex oxide carrier and a catalytic metal supported on the complex oxide carrier. The alumina-zirconia complex oxide carrier contains alumina and zirconia grafted on a surface of the alumina. The alumina-zirconia complex oxide carrier contains 1-50 wt% of zirconia based on 100 wt% of alumina. In the supported catalyst, 1-50 wt% of catalytic metal is supported on 100 wt% of complex oxide carrier. Further, the catalytic metal is Pt, Au, Pd, Rh, La, Ce, Yb, Ni, Cu, Ag, Ru, Ir, Os, Au, Co, V, Fe, Sn, Ca, Mg, a mixture thereof or an alloy thereof.