A method for preparing a catalyst for steam refomring methane gas containing sulfur and a method for producing hydrogen using a catalyst prepared thereby
The present invention relates to a method for using an alumina carrier mixed with heterogeneous crystal phases to manufacture a nickel-auxiliary metal type composite metal catalyst, and a method for using the same to produce hydrogen through a steam reforming reaction of sulfur-containing methane ga...
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Sprache: | eng ; kor |
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Zusammenfassung: | The present invention relates to a method for using an alumina carrier mixed with heterogeneous crystal phases to manufacture a nickel-auxiliary metal type composite metal catalyst, and a method for using the same to produce hydrogen through a steam reforming reaction of sulfur-containing methane gas and, more specifically, to a nickel-transition metal/hybrid alumina catalyst which is manufactured by complexly and sequentially including nickel and auxiliary metal by pressure spraying into a hybrid alumina carrier from which acid points have been removed through heat treatment, a manufacturing method thereof, and a method for using the same to produce hydrogen through a steam reforming reaction of sulfur-containing methane gas. According to the present invention, the alumina carrier has an alpha alumina/theta alumina ratio of 10 or more, a specific surface area of 5 to 20 m^2/g, and an average pore distribution in the range of 10 to 50 nm, the amount of nickel supported in the catalyst is 5 to 15 wt%, the dispersion degree of nickel is 2 to 15%, and the auxiliary metal is supported at a nickel/auxiliary metal weight ratio in the range of 5 to 10. Accordingly, by using the catalyst manufactured according to the present invention, ventilation between reactants and the catalyst is maximized due to macropores in the catalyst to increase the reaction rate, carbon deposition and particle sintering at high temperatures, which are problems with nickel catalysts, were suppressed through bonding with cerium, and barium is added to increase resistance to sulfur poisoning to increase the durability of the catalyst, thereby enabling stable production of hydrogen for a long time.
본 발명은 이종의 결정상이 혼합된 알루미나 담체를 이용하여 니켈-보조금속 형태의 복합금속 촉매를 제조하는 방법 및 이를 이용하여 황 함유 메탄가스의 수증기 개질반응을 통한 수소의 제조방법에 관한 것으로, 열처리를 통해 산점이 제거된 혼성 알루미나 담체에 가압분사방식으로 니켈 및 보조금속을 복합 및 순차적으로 포함시켜 제조되며, 알루미나 담체는 알파알루미나/세타알루미나 비율이 10이상이고, 비표면적은 5-20m2/g, 평균기공분포가 10 내지 50nm 범위로 제조하여 사용하며, 촉매 내 니켈의 담지량은 5 내지 15중량%, 니켈의 분산도는 2-15%, 니켈/보조금속의 중량비는 5 내지 10 범위로 보조금속을 담지하는 것을 특징으로 하는 니켈-전이금속/혼성 알루미나 촉매 및 이의 제조에 관한 것이며, 상기 촉매를 이용하여 황 함유 메탄가스의 수증기 개질반응에 의해 수소를 제조하는 방법에 관한 것이다. 본 발명에 따라 제조된 촉매를 사용함으로써 촉매 내 거대기공으로 인해 반응물과 촉매와의 통기성을 극대화하여 반응속도를 높여주었으며, 니켈 촉매의 문제점인 탄소침적 및 고온에서의 입자소결현상을 세륨과의 결합을 통해 억제시켰으며 바륨을 추가하여 황 피독에 대한 저항성을 높여 촉매 내구성이 보다 향상되어 장시간 안정적인 수소 제조가 가능하다. |
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