Abstract:
본 발명은 중간생성물의 선택도 모니터링을 통한 메탄올로부터 경질올레핀을 제조하는 순환유동층 공정의 효율적 운전에 관한 것으로, 구체적으로 디메틸에테르(DME) 선택도를 모니터링하여 사용된 촉매의 비활성화 정도를 예측하고 촉매 재생을 위한 공기 유량을 조절하여 최적화된 코크 정도를 유지시킴으로써 경질올레핀계 탄화수소의 생산성을 효과적으로 증진할 수 있고, 특히 에틸렌 및 프로필렌에 대한 우수한 선택성을 유지할 수 있는 방법에 관한 것이다.
Abstract:
The present invention relates to a catalyst for an aqueous phase reforming reaction having a nano-sized mesoporous carbon carrier, a method for producing the same, and a method for producing hydrogen from oxygen-containing hydrocarbon through the aqueous phase reforming reaction using the same. When the catalyst of the present invention is used for the aqueous phase reforming reaction for producing hydrogen from oxygen-containing hydrocarbon, the catalyst has a larger surface area than an existing micro-sized mesoporous carbon carrier so that the degree of dispersion of active metals is increased and the structure of mesopores is developed. Accordingly, the speed of transferring and diffusing material becomes rapid so that the transfer rate, production rate, and production speed of hydrogen gas can be improved.
Abstract:
The present invention relates to a catalyst for manufacturing 1,3- butadiene supported with a first metal oxide and a second metal oxide in silica, wherein the first metal oxide is a tantalum oxide and the second metal oxide is at least one selected from a group consisting of cerium oxide, nickel oxide, zirconium oxide and manganese oxide; and a manufacturing method for 1,3- butadiene using the same. Specifically, the catalyst of the present invention is practically applicable to a fixed bed reactor by selecting a silica mold carrier having an appropriate size and strength; impregnates tantalum oxide as the first metal oxide and cerium oxide, nickel oxide, zirconium oxide and manganese oxide as the second metal oxide; inhibits an occurrence of deactivation by minimizing the selectivity degradation of 1,3-butadiene as reaction time passes, which significantly improves the life expectancy of the catalyst as compared to an existing silica-based catalyst, thereby capable of being effectively used for the manufacture of 1,3-butadiene. [Reference numerals] (AA) Total transformation rate (%); (BB) Total transformation rate; (CC) Butadiene selectivity; (DD) Reaction time (hour); (EE) Butadiene selectivity (%)
Abstract:
PURPOSE: A catalyst for aqueous phase reforming reaction with a stable structure compared to that of a conventional catalyst and a manufacturing method thereof are provided to significantly increase a conversion ratio and a production rate of hydrogen and to provide hydrogen economically and environment-friendlily. CONSTITUTION: A catalyst for aqueous phase reforming reaction comprises a metal component carried in a mesoporous carbon carrier. The metal component is one selected from the group consisting of metals of VIIB group and VIII group. The mesoporous carbon carrier is manufactured by using a 3-dimensional mesoporous silica molecular sieve of one selected from the group consisting of SBA-1, SBA-6, SBA-16, FDU-5, KIT-6, and MCM-48.
Abstract:
PURPOSE: A carbon supported metal catalyst with a three dimensional bimodal mesoporous structure and an aqueous phase reforming method of oxygenated compounds using the same are provided to directly form carbon with a bimodal porous structure without a separate template material. CONSTITUTION: An aqueous phase reforming method of oxygenated compounds using a carbon supported metal catalyst with a three dimensional bimodal mesoporous structure includes the following steps: a carbon precursor is impregnated into silica; the impregnated product is dried and carbonated to prepare a silica/carbon complex; and the silica is removed from the silica/carbon complex. The silica is one or more selected from silica gel with mesopores, silica nanoparticles, silica beads, aluminum anodic oxide, and alumino silicagel. [Reference numerals] (AA) Adsorption; (BB) Desorption; (CC) Adsorption amount; (DD) Relative pressure
Abstract:
PURPOSE: A titanium-SAPO-34 crystalline catalyst, a method for preparing the same, and a method for manufacturing light olefin using the same are provided to improve the productivity of the light olefin by improving the crystallinity and the hydrothermal stability of the catalyst. CONSTITUTION: A tetraethyl aluminohydroxide(TEAlOH) solution containing an organic templating agent and an alumina precursor is prepared. Phosphoric acid and water are mixed with the TEAlOH solution to obtain synthetic gel. A silica precursor and a titanium precursor are added in the synthetic gel, and a mixing operation is implemented. The mixed synthetic gel is aged and hydrothermal synthesized to obtain Ti-SAPO-34 gel. Non-reacted precursors are eliminated, and a drying operation is implemented. The Ti-SAPO-34 is plasticized.
Abstract:
PURPOSE: A disulfate-based promoter for natural gas hydrate(NGH) is provided to increase dewatering efficiency, storage ability, and production rate of natural gas hydrate. CONSTITUTION: A disulfate-based promoter for natural gas hydrate(NGH) is anionic multi-chain type disulfate based surfactant and marked as chemical formula 1. In the chemical formula 1, R1 and R2 can be same or different, and are selected from an alkyl group which is saturated or unsaturated and C1-30 straight-chain or branched-chain. M is selected from alkali metal in the chemical formula 1. The alkyl group can be substituted for fluorine atom or aromatic ring. The promoter additionally includes another promoter which is selected from anionic, cationic, and non-ionic surfactant having an ability of promoting hydrate generation.
Abstract:
PURPOSE: A polymer-silica composite catalyst for selective oxidative desulfurization and a method for manufacturing the same are provided to reduce the precipitation of byproducts generated from the selective oxidative desulfurization. CONSTITUTION: A transition metal is carried in a silica carrier. The surface of the silica carrier carrying the transition metal is silylated based on vinyl organic silane. The copolymer of a styrene-based monomer and a cross-linking agent is surface-polymerized with the surface of the catalyst. The silica is silica bead, silica molecule, silica nano-particle, silica crystal, silica gel, or mesoporous silica of 2-50nm pore size and 150-1000m^2/g specific surface area. The transition metal is one selected from titanium, vanadium, molybdenum, and tungsten.
Abstract:
본 발명은 피셔-트롭쉬 합성반응에 사용되는 철계 촉매의 제조방법 및 이를 이용한 액체탄화수소의 제조방법에 관한 것으로, 더욱 상세하게는 질산철구수화물(Fe(NO 3 )·9H 2 O), 질산구리(Cu(NO 3 ) 2· 3H 2 O) 및 질산알루미늄(Al(NO 3 )·9H 2 O)의 수용액과 수산화암모늄(NH 4 OH) 수용액의 혼합용액에 증류수를 교반하면서 적하시킨 후 공침시키는 단계(단계 1); 상기 단계 1에서 제조된 반응용액을 건조시켜 분말을 얻는 단계(단계 2); 상기 단계 2에서 얻은 분말을 증류수 슬러리 상에서 분산시킨 후 탄산칼륨(K 2 CO 3 )를 함침시키는 단계(단계 3); 및 상기 단계 3에서 제조된 혼합물을 건조시킨 후 400 - 750 ℃에서 7 - 12 시간 동안 소성시키는 단계(단계 4)를 포함하는 액체탄화수소를 제조하기 위한 피셔-트롭쉬 합성반응에 사용되는 철계 촉매의 제조방법 및 상기 철계 촉매를 이용한 액체탄화수소의 제조방법을 제공한다. 피셔-트롭쉬 합성반응, 철계 촉매, 공침, 소성, 액체탄화수소