• Title/Summary/Keyword: 아크로레인

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Synergistic Effects of Mo-V Based Mixed Oxide Catalysts for Acrolein Oxidation(I) (아크로레인 산화용 Mo-V 계 혼합산화물 촉매의 상승효과(I))

  • Na, Suk-Eun;Kim, Kyung-Hoon;Chung, Jong-Shik;Park, Dae-Won
    • Applied Chemistry for Engineering
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    • v.3 no.4
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    • pp.717-721
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    • 1992
  • Mechanical mixtures of vanadium molybdate and copper molybdate catalysts prepared by coprecipitation method, and those of $MoO_3$ and $V_2O_5$ were used to study the synergistic effects between each metal oxide for the selective oxidation of acrolein. The catalytic activity results revealed that the conversion of acrolein and yield of acrylic acid were increased with the mixture catalysts and it could be explained by a remote control mechanism. Thermal gravimetric analysis confirmed the evolution of lattice oxygen in the mixture catalysts.

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Synthesis of Pyridine and β-Picoline from Acrolein and Ammonia on Pd/SiO2-Al2O3 Catalysts (Pd/SiO2-Al2O3 촉매상에서 아크로레인과 암모니아로 부터 피리딘과 β-피콜린의 합성)

  • Chun, Sung-Woo;Choi, Jung-Kun;Oh, Seok-Youn;Na, Suk-Eun;Park, Dae-Won
    • Applied Chemistry for Engineering
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    • v.2 no.2
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    • pp.138-146
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    • 1991
  • $Pd/SiO_2-Al_2O_3$ catalysts were prepared for the synthesis of pyridine and ${\beta}$-picoline from acrolein and ammonia. The activity of these catalysts decreased considerably by the formation of deposits on catalyst surface during the reaction. TPR study showed that the deposits were formed by the condensation polymerization of acrolein and ammonia. The conversion and production rate of pyridine and ${\beta}$-picoline decreased with the partial pressure of acrolein. The amount of deposits and the regeneration temperature of spent catalysts increased with the partial pressure of acrolein but they were independent of the concentration of ammonia.

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Development of ozone passive sampler with fluorescence intensity method (형광광도법을 이용한 오존 passive sampler의 개발)

  • 김한수;김선태;윤은영;김신도
    • Proceedings of the Korea Air Pollution Research Association Conference
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    • 2001.11a
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    • pp.245-246
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    • 2001
  • 우리나라에서는 지금까지 대기 오염과 관련하여 환경기준 달성을 위한 정책수립에 있어서 대상물질은 주로 이산화황(SO$_2$)과 먼지(TSP) 등으로 경제개발과 산업발전과정 등에서 발생되는 오염물질이었다. 그러나 최근 몇 년사이 급격한 자동차의 증가로 인한 이산화질소(NO$_2$)와 휘발성유기화합물(VOCs)의 배출이 증가하고 있어 환경규제정책도 점차 변하고 있는 실정이다. 이러한 오염물질들이 대기중에서 태양복사에너지에 의해 광화학 반응을 일으켜 오존(ozone), PAN(peroxyacethyl nitrate), PBN(peroxy benzoyl nitrate), 아크로레인(carolein), 포름알데히드(HCHO, formaldehyde) 등 광화학 산화제를 생성하여 인체, 동ㆍ식물 및 재산상의 피해를 유발하고 있다. (중략)

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The Affect of Fuel Properties on Exhaust Emissions Formation of Used Vegetable Oil in a Diesel Engine (폐식용유를 연료로 하는 디젤 기관(機關)의 배기(排氣) 배출물 생성(生成)에 미치는 연료(燃料) 성상(性狀)의 영향(影響))

  • Oh, Y.Y.
    • Transactions of the Korean Society of Automotive Engineers
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    • v.3 no.6
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    • pp.162-175
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    • 1995
  • Exhaust emissions in diesel engine are affected by fuel properties, but the reason for this is not clear. Especially, the recent strong interest in using low-grade fuel such as used vegetable oil as alternative diesel fuel demands extensive investigation in order to clarify the exhaust emissions. The purpose of this study is to evaluate the feasibility of a used vegetable oil as an alternative fuel in a diesel engine in terms of exhaust emissions. The emission concentration of used vegetable oil such as formaldehyde and acrolein is two times than that of diesel fuel. However, since that of alcohol is ten times than that of used vegetable oil and that concentration is very low, it is not a problem for human health.

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Effect of Tungsten on Selective Oxidation of Acrolein with Mo-V-W-O Mixed Oxide Cataysts (Mo-V-W-O 촉매상에서 아크로레인의 선택산화반응에 대한 텅스텐의 영향)

  • Na, Suk-Eun;Park, Dae-Won;Chung, Jong-Shik
    • Applied Chemistry for Engineering
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    • v.4 no.2
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    • pp.308-317
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    • 1993
  • The study is related to the synthesis of acrylic acid by selective oxidation of acrolein on Mo-V-W multicomponent mixed oxide catalysts. Mo-V-W-O(WVM), Mo-V-O/Mo-W-O(VM/WM), Mo-W-O/Mo-V-O(WM/VM) and mechanical mixtures of Mo-V-O and Mo-W-O(M-VM+WM) were prepared and characterized by BET, XRD, SEM and EPMA. Catalytic activity of these catalysts was tested in a continuous fixed bed reactor. In WVM catalysts small amount of tungsten added to VM increased surface area and selectivity of acrylic acid, but excess amount of tungsten decreased reaction rate of acrolein and selectivity. VM/WM catalysts, VM supported on WM, showed higher activity and selectivity than WM/VM catalysts where WM is supported on VM. Phase cooperation between WM and VM was observed in mechanical mixture of WM and VM and they showed higher yield than WM or VM.

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Reductive Amination of ${\alpha}$,${\beta}$-Unsaturated Carbonyl Compounds with Tetracarbonylhydridoferrate as a Reducing Agent (${\alpha}$,${\beta}$-不飽和 카르보닐化合物의 還元 아미노화反應)

  • Kim Hong-Seok;Shim Sang Chul;Shim Sang Chull
    • Journal of the Korean Chemical Society
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    • v.23 no.2
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    • pp.99-103
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    • 1979
  • The reductive amination of three ${\alpha}$,${\beta}$-unsaturated aldehydes, cinnamaldehyde, crotonaldehyde, and acrolein are carried out successfully by tetracarbonylhydridoferrate in the presence of various primary amines. In a typical reaction, a mixture of potassium tetracarbonylhydridoferrate (22 mmole), an amine (22∼44 mole) and ${\alpha}$,${\beta}$-unsaturated aldehyde (22 mmole), in ethanol (30∼50 ml) was stirred for 9∼60 hours at room temperature under carbon monoxide atmosphere. All the products were characterized as secondary amines by mass, infrared, and nmr spectra as well as gas chromatographic data.

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Effect of the Structure of MoO3/bismuth molybdate Binary Phase Catalysts on the Selective Oxidation of Propylene (MoO3/bismuth molybdate 혼합 2상 촉매의 구조에 따른 프로필렌 선택산화반응 특성)

  • Cha, T.B.;Choi, M.J.;Park, D.W.;Chung, J.S.
    • Applied Chemistry for Engineering
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    • v.3 no.1
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    • pp.53-63
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    • 1992
  • M/BM -series catalysts, $MoO_3$ supported on ${\alpha}-Bi_2Mo_3O_{12}$ were also prepared by impregnation method. BM/M-series catalysts, ${\alpha}-Bi_2Mo_3O_{12}$ supported on $MoO_3$ were also prepared by coprecipitation. Structure and catalytic properties of the two phase catalysts were studied by means of using nitrogen adsorption, X-ray diffraction, and scanning electron microscopy. The reaction test for the selective oxidation of propylene to acrolein over Bi-molybdate catalysts was studied using a fixed-bed reactor system. In M/BM-series catalysts, $MoO_3$ was dispersed on ${\alpha}-Bi_2Mo_3O_{12}$, and the crystal structure of ${\alpha}-Bi_2Mo_3O_{12}$ remains unchanged by the presence of excess $MoO_3$. However the surface morphology and bulk structure of BM/M-series catalysts were altered probably because the precipitated $Bi(OH)_3$ reacted with $MoO_3$ during the calcination to form ${\alpha}-Bi_2Mo_3O_{12}$ phase. The results of propylene oxidation on both series catalysts showed that the reaction took place over the surface of ${\alpha}-Bi_2Mo_3O_{12}$ particle and the role of excess $MoO_3$ was to supply oxygen to ${\alpha}-Bi_2Mo_3O_{12}$. These increasing effects on activity were also observed in the mechanical mixtures of ${\alpha}-Bi_2Mo_3O_{12}$ and $MoO_3$.

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