Abstract:
본 발명은 합성가스로부터 포름산을 제조하는 공정 및 장치에 관한 것으로, 구체적으로는 합성가스의 수성가스 전환반응에 의해 제조된 수소 및 이산화탄소의 혼합가스(혼합물)와, 반응매체인 아민계 화합물을 이용하여 연소에 의해 배출된 배가스로부터 이산화탄소를 포집한 아민 부가화합물을 반응기에 도입하여 포름산을 제조하는 공정 및 장치에 관한 것이다.
Abstract:
본 발명은 전기분무법(electrospray deposition)을 이용하여 금속지지체 상에 활성이 높은 나노구조의 백금(Pt) 박막을 제조하는 방법에 관한 것으로, 더욱 구체적으로는 에탄올에 백금(Pt) 전구체를 녹여 분무용 전구체 용액을 제조하는 단계(단계 1); 전기 분무장치의 지지체홀더와 노즐 사이에 DC 전압을 인가한 후 상기 단계 1에서 제조된 전구체 용액을 지지체 상에 분사하여 백금박막을 형성하는 단계(단계 2); 및 상기 단계 2에서 형성된 백금박막을 열처리하는 단계(단계 3)를 포함하는 것을 특징으로 하는 전기분무법에 의한 백금박막의 제조방법에 관한 것이다. 본 발명에 의하면, 분무되는 전구체 용액의 양을 조절함으로써 백금박막의 두께의 조절이 용이하며, 대면적의 지지체에 연속적으로 백금박막을 제조할 수 있기 때문에 고가의 백금을 소량 사용하여 활성이 높은 백금박막을 획득할 수 있으며, 광에너지를 전기 또는 화학 에너지로 전환하는 공정이나 폐수 및 정수처리 시스템에서 안정된 환원전극(cathode electrode)으로 사용되는 Pt 전극을 대체하여 유용하게 사용될 수 있다.
Abstract:
PURPOSE: A method for preparing silica containing η-alumina to be used as a catalyst for synthesizing dimethyl ether, the η-alumina prepared by the same, and a method for preparing the dimethyl ether using the catalyst are provided to reduce side reactions such as the generation of hydrocarbon and to maintain superior reactivity and stability. CONSTITUTION: A method for preparing silica containing η-alumina used as a catalyst for synthesizing dimethyl ether includes the following: Aluminium tri-sec butoxide is introduced into water in order to prepare a mixed solution. The mixed solution is aged to eliminate a mother liquid through a centrifugal process. A gel without the mother liquid is obtained. A washing process and a drying process are implemented. A resultant is plasticized. Silica of 0.05 to 10 wt% is coated on the plasticized product.
Abstract:
PURPOSE: A platinum thin-film and a method of manufacturing a platinum thin-film using electro-deposition are provided to increase the generation of hydrogen since the platinum thin-film is used as the counter electrode of a photoelectrochemical cell. CONSTITUTION: A method of manufacturing a platinum thin-film using electro-deposition is as follows. Chloroplatinic acid(H2PtCl6xH2O) is melted in the distilled water of deposition reactor, and thus aqueous electrolyte is manufactured. A support is dipped in the aqueous electrolyte of the deposition reactor, and the support comprises a reference electrode, a counter electrode, and a working electrode. Voltage is applied to the working electrode, and thus platinum is electrodeposited.
Abstract:
A catalyst for synthesizing dimethylether from synthesis gas is provided to increase catalyst activity for both methanol synthesis reaction and aqueous gas reaction such that dimethylether is highly synthesized when the catalyst is physically mixed with a solid acid. A catalyst for synthesizing dimethylether from synthesis gas comprises a complex metal oxide represented by the formula(1): (CuO)x(ZnO)y(Al2O3)z : (Y2O3)p in which x, y, z and p independently indicate mole number of respective oxides, x/y is 0.1-10, x/(y+z) is 0.1-10, x/(y+z+p) is 0.1-10 and p/(x+y+z) is 0.01-1, and 1-90 wt.% of a solid acid. The complex metal oxide has copper surface area of more than 10 m^2/g and is prepared by co-precipitating water-soluble salt solution of copper, zinc, aluminum and yttrium using an alkali precipitating agent at pH 5-12, and drying and calcinating the obtained precipitated products at 250-700 deg.C. The solid acid is selected from gamma alumina, silica and zeolite. The dimethylether is synthesized from synthesis gas in the presence of the catalyst under conditions of GHSV(Gas Hourly Space Velocity) 500-300,000 g_cat/h, temperature of 200-350 deg.C and pressure of 5-120 atmospheric pressure.
Abstract:
A method of preparing a large sized-nanocrystalline cobalt metal thin film with excellent catalytic activity in mild conditions is provided. A method of preparing a cobalt metal thin film by electrodeposition comprises: immersing a counter electrode and a working electrode into an aqueous solution that has a pH of 4 to 5 and contains a cobalt salt with a concentration of 10 to 500 mM; and impressing a voltage of -0.7 to -1.3 V to both electrodes at a temperature of 0 to 40 deg.C to form a Co metal thin film on the working electrode. The cobalt salt is selected from the group consisting of cobalt nitrate(Co(NO3)2), cobalt acetate(Co(C2H3O2)3), cobalt sulfate(CoSO4) and cobalt chloride(CoCl2). The working electrode and the counter electrode are substrates respectively selected from the group consisting of titanium(Ti), nickel(Ni), molybdenum(Mo), cadmium(Cd), platinum(Pt), gold(Au), Indium-Tin-Oxide(ITO) coated glass, stainless steel, and carbon substrate.
Abstract translation:提供了在温和条件下制备具有优异催化活性的大尺寸纳米晶钴金属薄膜的方法。 通过电沉积制备钴金属薄膜的方法包括:将对电极和工作电极浸入pH值为4至5且含有浓度为10至500mM的钴盐的水溶液中; 在0〜40℃的温度下对两个电极施加-0.7〜-1.3V的电压,在工作电极上形成Co金属薄膜。 钴盐选自硝酸钴(Co(NO 3)2),乙酸钴(Co(C 2 H 3 O 2)3),硫酸钴(CoSO 4)和氯化钴(CoCl 2)。 工作电极和反电极是分别选自由钛(Ti),镍(Ni),钼(Mo),镉(Cd),铂(Pt),金(Au),铟锡合金 氧化物(ITO)镀膜玻璃,不锈钢和碳基板。
Abstract:
본 발명은 촉매 제조시 크롬 이온을 첨가함으로서 촉매 성능이 향상되고 수명이 연장된 실리카 고체 촉매, 이의 제조 방법 및 이를 사용하여 기상의 베크만(Beckmann) 전환 반응에 의하여 시클로헥사논 옥심(cyclohexanone oxime)으로부터 ε-카프로락탐(ε-caprolactam)을 제조하는 방법에 관한 것이다.