Abstract:
본 발명은 합성가스로부터 디메틸에테르를 직접 합성용 촉매 및 이의 제조방법에 관한 것으로서, 더욱 상세하게는 CuO, ZnO 및 Al 2 O 3 를 일정비로 함유한 Cu-Zn-Al계 산화물과, 페리어라이트 제올라이트 단독 또는 특정의 금속으로 표면이 함유된 페리어라이트 제올라이트가 일정량 혼합된 신규의 촉매계로, 종래의 2단으로 구성된 복잡한 공정 대신에 1회 공정(one-pass)으로 합성가스로부터 디메틸에테르의 직접 합성이 가능하고, 동시에 부산물인 탄화수소 및 이산화탄소의 생성을 억제하면서도 디메틸에테르의 선택적 수율 향상이 가능하며, 특히 종래에 알려진 촉매와 비교하여 1회 공정(one-pass)으로 전환율을 크게 향상시킬 수 있는 합성가스로부터 디메틸에테르를 직접 합성용 촉매 및 이의 제조방법에 관한 것이다. Cu-Zn-Al계 산화물, 지르코늄, 페리어라이트, 제올라이트, 합성가스, 디메틸에테르, 공침법
Abstract:
본 발명은 천연가스의 수증기 개질반응과, 동시에 이산화탄소와 메탄의 개질반응을 수행하는 복합 개질반응으로 일산화탄소와 수소가 일정비를 유지하는 합성가스를 제조하고, 상기 제조된 합성가스를 특정의 촉매하에서 피셔-트롭시 반응을 수행하며, 상기 일련의 공정상 부산물인 메탄 및 이산화탄소를 복합 개질반응의 원료물질로 재순환하는 일련의 공정으로, 종래에 비해 경질탄화수소의 수율 증대 뿐만 아니라 전체 공정의 탄소이용 효율을 증대할 수 있는 천연가스로부터 경질탄화수소의 직접 제조방법에 관한 것이다. 피셔-트롭시 반응(FTS), 복합개질 반응, 경질탄화수소
Abstract:
A catalyst for dimethyl ether direct composition from synthetic gas is provided to suppress production of carbon dioxide and hydrocarbon which is by-product and to improve optional yield of the dimethyl ether. A catalyst for dimethyl ether direct composition from synthetic gas comprises a ferrierite zeolite of 1 weight and Cu-Zn-Al system oxide of 0.1 ~ 5 weight. The Cu-Zn-Al system oxide contains CuO 40 ~ 60 weight%, ZnO 35 ~ 45 weight% and Al2O3 5 ~ 15 weight%. The ferrierite zeolite contains or does not contain single metal or two or more metals selected from IIA, IVB and lanthanide. The metal of 0.5 ~ 5 weight% is contained based on the ferrierite zeolite of 100 weight%. A specific surface area of the ferrierite zeolite is 200 ~ 600 m^2/g. A molar ratio of SiO2/Al2O3 is 20 ~80.
Abstract:
An alumina-silica support is provided to secure high conversion rate of syngas, minimize production of by-products, and obtain long-term performance stability of the catalyst when performing a Fischer-Tropsch reaction by comprising SiO2 and Al2O3, and by allowing a particular specific surface area and small and large pores to be present in the support at the same time, a catalyst using the support is provided, and a method for production of liquid hydrocarbons from syngas using the catalyst is provided. As an alumina-silica support of a double layer structure which contains 1 to 80 wt.% of Al2O3 and 20 to 99 wt.% of SiO2, and which is formed by dispersing alumina particles onto a surface of silica, an alumina-silica support with a bimodal structure and a double layer structure is characterized in that a bimodal structure in which small pores(PS1) and large pores(PS2) with different pore sizes coexist is formed in the support, and a size of the small pores ranges 2 to 4 mum and a size of the large pores is more than 4 and less than or equal to 20 mum. The support has a total specific surface area of 150 to 400 m^2/g. The support maintains a ratio(S1/S2) ranging from 0.05 to 0.5, the ratio being a specific surface area(S1) of small pores ranged from 2 to 4 mum to a specific surface area(S2) of large pores ranged from 4 to 20 mum. A catalyst comprises 60 to 95 wt.% of the alumina-silica support onto which one or more transition metals selected from cobalt(Co), zirconium(Zr), ruthenium(Ru), rhenium(Re), and platinum(Pt) are supported.
Abstract:
A catalyst for simultaneously preparing methanol and dimethyl ether from synthetic gas and a method for producing the catalyst are provided to improve the conversion rate of the synthetic gas and minimize the production of byproducts, by constituting the catalyst to have small pores and large pores together. A porous catalyst includes Cu-Zn-Al-based oxide, which contains 30-45 wt% of CuO, 25-35 wt% of ZnO, and 20-45 wt% of Al2O3. The catalyst has a double pore structure where small pores having relatively small sizes and large pores having relatively large sizes exist simultaneously. The small pores have sizes of no less than 2 nm and no more than 20 nm, and the large pores have sizes of more than 20 nm and no more than 100 nm. Further, a whole surface area of the catalyst is 70 to 180 m^2/g.