Abstract:
PURPOSE: A novel metal catalyst supported on activated carbon aerogel, a method for preparing the same, a method for decomposing lignin compounds using the catalyst are provided to selectively decompose carbon-oxygen-carbon bonds in the lignin compounds under low temperatures and pressures. CONSTITUTION: A novel metal catalyst supported on activated carbon aerogel selectively decomposes carbon-oxygen-carbon bonds in the lignin compounds to generate aromatic compounds. The catalyst includes the activated carbon aerogel and 1-30 weight% of novel metals supported on the activated carbon aerogel. The novel metals are one or more selected from a group including palladium, rhodium, ruthenium, and platinum. A method for preparing the activated carbon aerogel includes a process in which an activator is added into carbon aerogel to be activated. The carbon aerogel is obtained by carbonizing gel. The gel is polymerizing one or more combinations selected from resorcinol and formaldehyde, melamine and formaldehyde, cresol and formaldehyde, and epoxy and amine. The activator is one selected from a group including carbon dioxide, steam, potassium hydroxide, phosphoric acid, and zinc chloride.
Abstract:
PURPOSE: A precious metal catalyst being immersed in activated carbon aerogel including cation exchange heteropoly acid and a decomposition method of lignin compound by using the same are provided to replace the conventional lignin pyrolysis method carried out under the existing condition of high temperature and high pressure (400°C, 50 atmosphere). CONSTITUTION: A precious metal catalyst being immersed in activated carbon aerogel including cation exchange heteropoly acid selectively disassembles a carbon-oxygen-carbon bond of an inner bond of lignin compound to produce an aromatic compound and is indicated as the chemical formula: M/Q_xH_3.0-xPW_12O_40/ACA. The precious metal catalyst is manufactured by: exchanging a hydrogen ion with one or more cation selected from alkaline metal ions or ammonium ions to produce heteropoly acid; immersing the heteropoly acid within the range of 5-70 weight% based on weight% of activation carbon aerogel to form activation carbon aerogel with an acid center; and immersing at least one precious metal selected from a group consisting of palladium, rhodium, and ruthenium and platinum in the activation carbon aerogel with the acid center within the range of 1-30 weight% based on weight% of activation carbon aerogel. A decomposition method of lignin compound by using the same comprises a step of decomposing lignin composition to produce an aromatic compound under the existence of the precious metal catalyst being immersed in activated carbon aerogel including cation exchange heteropoly acid, at 300°C or lower and 50 hydrogen atmosphere or lower. [Reference numerals] (AA) 4-phenoxyphenol conversion rate; (BB) Selectivity rate of main product; (CC) Yield rate of main product
Abstract:
본 발명은 카본 에어로젤에 고정화된 헤테로폴리산 담지 촉매, 그 제조방법 및 상기 촉매를 이용한 이소프로판올의 산화반응에 의한 아세톤 제조방법에 관한 것으로, 보다 상세하게는 표면에 아민기(-NR 1 R 2 R 3 + , 상기 R 1 , R 2 및 R 3 은 각각 독립적으로 수소 또는 C1 내지 C20의 알킬기)를 부착한 카본 에어로젤에 음이온성의 헤테로폴리산을 무게비로 1:0.01 내지 2 범위에서 반응시켜 이온결합시킨 것을 특징으로 하는 카본 에어로젤 담체에 화학적으로 고정화된 헤테로폴리산 담지 촉매, 그 제조방법 및 상기 촉매를 이용한 이소프로판올의 산화반응에 의한 아세톤 제조방법에 관한 것으로, 본 발명은 표면적이 넓은 다공성의 카본 에어로젤을 화학적 방법으로 처리하여 탄소의 표면에 양이온성 관능기를 도입한 후 여기에 음이온 특성을 지닌 헤테로폴리산을 반응시켜 화학적으로 고정화된 헤테로폴리산 담지 촉매를 제공하며, 상기 촉매를 이용하여 이소프로판올의 산화에 의한 아세톤 제조를 수행하는 경우 산 촉매 특성이 억제되고 산화 촉매 특성이 활성화되어 � ��매 반응 시 높은 이소프로판올 전환율과 높은 아세톤 선택도를 나타내었다.
Abstract:
The present invention relates to a catalyst which produces an aromatic family by selectively decomposing a carbon-oxygen-carbon bond in an internal combination inside lignin, and is denoted by chemical formula: M/QxH3.0-xPW12O40/ACA-SO3H (M is one or more precious metal selected from the group consisting of palladium, rhodium, ruthenium, and platinum; QxH3.0-xPW12O40 is positive ion-exchanged heteropolyacid; ACA is active carbon aerogel; and -SO3H is a sulfonic acid group). The catalyst is produced by depositing 1-30 wt% of one or more precious metal selected from the group consisting of palladium, rhodium, ruthenium, and platinum based on the weight of the active carbon aerogel, on a carrier obtained by impregnating 5-70 wt% of positive ion-exchanged heteropolyacid on the carbon aerogel containing sulfonic acid which is produced by reacting high concentration sulfuric acid and the active carbon aerogel and combining 0.5-5 wt% of sulfonic acid on the surface of the active carbon aerogel based on the weight of the active carbon aerogel.
Abstract:
본 발명은 산점을 포함한 활성 카본 에어로젤에 담지된 귀금속 촉매, 그 제조방법 및 상기 촉매를 이용한 리그닌 화합물 분해 방법에 관한 것으로, 보다 상세하게는 목질계 바이오매스 구성 성분 중 리그닌의 탄소-산소 결합을 선택적으로 분해하여 방향족 화합물로 전환하는 촉매로서, 화학식 M/ACA-SO 3 H(상기 화학식 중 M은 귀금속이며, ACA는 활성 카본 에어로젤)으로 표현되며, 황함유량 기준으로 5 내지 30중량% 범위의 산점을 포함한 활성 카본 에어로젤에 팔라듐, 로듐, 루세늄 및 백금으로 구성된 군으로부터 선택된 1종 이상의 귀금속이 담지된 것을 특징으로 하는 산점을 포함한 활성 카본 에어로젤에 담지된 귀금속 촉매, 그 제조방법 및 상기 촉매를 이용한 리그닌 화합물 분해방법에 관한 것으로, 본 발명의 리그닌 모델 화합물 분해용 산점이 포함� � 활성 카본 에어로젤에 담지된 귀금속 촉매를 리그닌 분해 공정에 사용할 경우 저온, 저압 조건에서 리그닌 화합물을 분해하여 페놀, 벤젠 등 고가의 방향족 화합물을 높은 전환율과 수율로 생산할 수 있다.
Abstract:
PURPOSE: A noble metal catalyst dipped in an active carbon aerogel including an acid center, a manufacturing method thereof, and a lignin complex decomposition method using the catalyst are provided to produce an expensive aromatic complex like phenol and benzene with high yield by decomposing lignin complex under the low pressure. CONSTITUTION: A noble metal catalyst dipped in an active carbon aerogel including an acid center selectively decomposes carbon-oxygen bonding of lignin among wood composite biomass component and transforms into an aromatic compound. The chemical equation of noble metal catalyst is expressed as Metal/Active Carbon Aerogel-Sulfonic acid(M/ACA-SO3H). The noble metal catalyst is dipped with a palladium with the active carbon aerogel including the acid center of 5-30 weight% based on the sulfur content, rhodium, ruthenium, and one or more of platinum group of selected noble metal. [Reference numerals] (AA) Conversion rate of 4- phenoxyphenol; (BB) Selectivity of main product; (CC) Yield of main product;
Abstract:
PURPOSE: A manufacturing method of dibutylether is provided to obtain high yield of the dibutylether under a mild condition by a strong acid strength of the catalyst when a heteropolyacid catalyst is applied to a dehydration of normal butanol in a batch reactor system. CONSTITUTION: A manufacturing method of dibutylether comprises: a step of manufacturing dibutylether by dehydration of n-butanol under the presence of an acid catalyst. The acid catalyst is a Keggin or Wells-Dawson type heteropolyacid catalyst, comprises one or more kinds selected from a group consisting of tungsten(W), molybdenum(Mo), vanadium(V), and niobium(Nb) as a coordinate atom, and comprises one or more kinds selected from a group consisting of phosphor(P), silicon(Si), germanium(Ge), arsenic(As), and boron(B) as a central element. [Reference numerals] (AA) Conversion ratio of n-butanol; (BB) Selectivity of dibutylether; (CC) Yield of dibutylether