Abstract:
The present invention relates to a method for dipping monolith type silica aerogel synthesized in a alkylsilane solution which is a dipping solution using a alkoxide precursor and provides a method for preparing hydrophobic monolith type silica aerogel, wherein the method includes a step of making hydrophobic surface and inside of the monolith type silica wet gel. According to the present invention, hydrophobicity can be rapidly and economically given to monolith type silica aerogel in a simple way using a small amount of alkyl silane, the shrinkability of the hydrophobic monolith type silica aerogel is reduced, allows manufacture in a semi-transparent form, low thermal conductivity which is similar to the hydrophilic silica aerogel can be maintained, and application as a heat insulation plate is possible due to improved hydrophobicity and thermal insulation. [Reference numerals] (AA) Monolith type wet gel producing step;(BB) Hydrogenating step using a dipping solution;(CC) Supercritical drying step;(DD) Hydrophobic silica aerogel
Abstract:
PURPOSE: A manufacturing method is provided to offer a manufacturing method of high-yield biofuel by hydrogenation-dehydration reaction of guaiacol using bifunctional catalyst and using biomass as a source including guaiacol. CONSTITUTION: A manufacturing method of biofuel includes a stage of injecting bifunctional catalyst including reaction solution including guaiacol, metal catalyst and acid catalyst into a reactor; a stage of cleaning a reactor and inside of a pipe connected with the reactor; a stage of increasing entire pressure of hydrogen and reaction solution by injecting hydrogen into the reactor; a stage of mixing hydrogen and reaction solution; a stage of progressing hydrogenation dehydration reaction; a stage of cooling the reactor; and a stage of collecting and analyzing a created product inside of the reactor. The metal catalyst is a metal nano particle for hydrogenation. The metal catalyst is one or alloy consisting of more than two of a group consisting of Pt, Pd, Ru, Ir and Rh. The acid catalyst is an acid catalyst for dehydration, is porous or non-porous catalytic converter reacting with a metal catalyst and an acid group is present on the surface of the catalytic converter. The catalytic converter is selected more than one of a group consisting of silica-alumina complex oxide, alumina, an activated carbon, zirconia and silica. The catalytic converter is selectively formed of a group consisting of a bulk, a plate, a powder, a pellet, a ball and an aerogel. The acid group is generated after processing an inorganic acid selected from a group consisting of a nitric acid, a sulfuric acid and a hydrochloric acid. The content of the metal catalyst ranges from 0.1 to 20 weight% based on weight of the catalytic converter. [Reference numerals] (AA) Guaiacol conversion rate or product yield(water%); (BB) Rh/silica-alumina, 20 minutes; (CC) Rh/silica-alumina, 40 minutes; (DD) Rh/silica-alumina, 1 hour; (EE) Rh/silica-alumina, 2 hours; (FF) Guaiacol conversion rate; (GG) Cyclohexane yield; (HH) Cyclohexanol yield; (II) Cyclohexanone yield; (JJ) 2-methoxy cyclohexanone yield; (KK) Phenol yield
Abstract:
본발명은진공포장재를이용한진공단열판제조방법및 이에의하여제조된진공단열판을제공한다. 본발명에따른진공단열판제공방법은에어로젤과같은모노리스형다공성소재를진공포장재로감싸고, 진공감압한후 밀봉처리하는과정을포함한다. 본발명에의하면진공단열판을간단한진공포장기술로제조할수 있으므로경제성이우수하다. 또한진공포장재를이용하므로, 내부의모노리스형다공성소재의우수한단열성을유지하면서도기계적강도및 수분에대한취약점을개선할수 있다. 따라서, 내구성과단열성이우수한진공단열판을제공할수 있다.
Abstract:
실리카 에어로젤 담체 및 상기 담체 내에 담지된 텅스토나트륨 및 망간 산화물을 포함하는 실리카 에어로젤 담지 촉매 및 그 제조방법, 그리고 상기 촉매를 이용한 메탄 전환 방법을 제공한다. 실리카 에어로젤 담지 촉매를 이용한 메탄 전환 방법은, 비교적 낮은 온도에서 메탄의 활성 유도가 가능하며, C 2 탄화수소의 수율이 우수하다는 장점이 있다. 실리카, 에어로젤, 텅스토나트륨, 망간, 촉매, 메탄, 산화이량화반응, C2탄화수소
Abstract:
PURPOSE: A methane conversion apparatus and a method thereof are provided to secure a high yield of hydrocarbon more than C2, to reduce the selectivity of CO and CO_2, and to process an oxidative dimerization reaction without a high temperature condition. CONSTITUTION: A methane conversion apparatus using a dielectric discharge and a catalytic reaction comprises a dielectric discharge reactor forming a low temperature plasma, and a oxidative dimerization reaction catalyst of methane filled in the inside of the reactor. The dielectric discharge reactor comprises the following: a reaction cylinder(4) including the plasma in the inside; electrodes(5,6) connected to the reaction cylinder; and a power supply unit(7) supplying electricity to the reaction cylinder.
Abstract:
이온성 액체와 산성용 이온 교환 수지를 사용하여 셀로비오스를 가수분해하는 방법이 개시된다. 상기 가수분해 방법은 셀로비오스의 가수분해 반응의 효율을 향상시켜 높은 수율의 글루코오스 생성이 가능하다. 이온성 액체, 이온 교환 수지, 셀로비오스, 가수분해, 글루코오스