• 제목/요약/키워드: Partial oxidation

검색결과 309건 처리시간 0.026초

아크젯 플라즈마에서의 메탄개질의 최적화 (PROCESS OPTIMIZATION OF METHANE REFORMING IN ARC JET)

  • 황나경;이대훈;송영훈
    • 한국연소학회:학술대회논문집
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    • 한국연소학회 2006년도 제33회 KOSCO SYMPOSIUM 논문집
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    • pp.266-271
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    • 2006
  • Characteristic of partial oxidation of methane using arc-jet plasma by AC power is investigated. Arc-jet reactor used in this work is slightly modified from typical arc jet reactor so that it can make and sustain stable state of plasma. Methane conversion, selectivity of chemicals such as hydrogen and hydrocarbon materials in the product are analyzed. Parametric approach on the performance of the reactor or detail on the partial oxidation process is carried with $O_2/C$ ratio as parameter. In addition to the results, SED and arc length is changed to understand the effect of current-voltage correlation on the reforming performance and relative role of thermal process.

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PARTIAL OXIDATION OF PROPANE ON NAFION SUPPORTED CATALYTIC MEMBRANE

  • F. Frusteri;C. Espro;F. Arena;F. Arena;E. Passalacqua;A.Patti;A. Parmaliana
    • 한국막학회:학술대회논문집
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    • 한국막학회 1999년도 The 7th Summer Workshop of the Membrane Society of Korea
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    • pp.55-58
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    • 1999
  • Nafion supported catalytic membranes were found to be active, stable and selective in th partial oxidation of propane to oxygenates with H2O2 under mild condition. Addition of Fe2+ in liquid phase enhances the reaction rate. Reaction proceeds according to a radical mechanism based on th electrophilic activation of propane on superacid sites and subsequent reaction of the activated paraffin with OH radicals. The use of a catalytic membrane, which allow separation of the intermediate products from the liquid phase containing the oxidant, was found to be effective to perform selective partial oxidation of propane with high yields to oxygenated products.

마이크로웨이브 플라즈마를 통한 메탄의 산화반응 (Oxidation of Methane via Microwave Plasmas)

  • 안범수
    • 한국응용과학기술학회지
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    • 제17권2호
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    • pp.89-93
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    • 2000
  • The oxidation of methane was carried out in six different configurations of plasma reactors in order to study the radical reactions inside and outside of the plasma zone and to explore the method to control them. Various radicals and reactive molecules, such as CH, $CH_{2}$, $CH_{3}$, H, and O(from $O_{2}$) were generated in the plasma. A variety of products were produced through many competing reaction pathways. Among them. partial oxidation products were usually not favored, because the intermediates leading to the partial oxidation products could be oxidized further to carbon dioxides easily. It is important to control the free radical reactions in the plasma reactor by controlling the experimental conditions so that the reactions leading to the desired products are the major pathways.

Oxidation Behavior of WC-TiC-TaC Binderless Cemented Carbide under Low Partial Pressure of Oxygen

  • Uchiyama, Yasuo;Ueno, Shuji;Sano, Hideaki;Tanaka, Hiroki;Nakahara, Kenji;Sakaguchi, Shigeya;Nakano, Osamu
    • 한국분말야금학회:학술대회논문집
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    • 한국분말야금학회 2006년도 Extended Abstracts of 2006 POWDER METALLURGY World Congress Part 1
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    • pp.355-356
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    • 2006
  • WC-TiC-TaC binderless cemented carbide was oxidized under low partial pressure of oxygen (50ppm) at 873K for 1 to 20 h. Surface roughness was measured using atomic force microscope, and effect of TiC amount on oxidation behavior of the carbide was investigated. WC phase was oxidized more easily than WC-TiC-TaC solid solution phase. With an increase in TiC amount, WC-TiC-TaC phase increased and the oxidation resistance of the carbide increased.

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석유화학폐수 처리장 방류수의 재이용을 위한 고정생물막 공정에서 Fenton 산화전처리의 적응가능성 (Applicability of the lenten's Reagent Oxidation to Biological Fixed-Film Process for Reuse of Effluents from the Petrochemical Wastewster Effluent Treatment Plant)

  • 이규훈;김미화;박태주
    • 한국환경과학회지
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    • 제4권5호
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    • pp.115-115
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    • 1995
  • Reuse of industrial effluents through the cooling systems in a petrochemical complex was described. The partial oxidation of the effluents from the biological treatment plant was examined, using Fenton''s reagent as a pretreatment step prior to a next treatment of the effluents. Next tertiary treatment using fixed-film reactor resulted in marked reductions in COD and suspended solids. The continuous fixed-film process with Fenton oxidation pretreatment showed a 23% increase in the COD removal efficiency when compared to that without pretreatment of Fenton oxidation under the volumetric organic loading rate of 0.1 kg COD/m3/day. The Fenton oxidation treatment seemed to be a possible method for tertiary biological treatment to reduce the residual toxicity with the enhanced biodegradation of the effluents.

석유화학폐수 처리장 방류수의 재이용을 위한 고정생물막 공정에서 Fenton 산화전처리의 적응가능성 (Applicability of the lenten류s Reagent Oxidation to Biological Fixed-Film Process for Reuse of Effluents from the Petrochemical Wastewster Effluent Treatment Plant)

  • 이규훈;김미화;박태주
    • 한국환경과학회지
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    • 제4권5호
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    • pp.501-508
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    • 1995
  • Reuse of industrial effluents through the cooling systems in a petrochemical complex was described. The partial oxidation of the effluents from the biological treatment plant was examined, using Fenton's reagent as a pretreatment step prior to a next treatment of the effluents. Next tertiary treatment using fixed-film reactor resulted in marked reductions in COD and suspended solids. The continuous fixed-film process with Fenton oxidation pretreatment showed a 23% increase in the COD removal efficiency when compared to that without pretreatment of Fenton oxidation under the volumetric organic loading rate of 0.1 kg COD/m3/day. The Fenton oxidation treatment seemed to be a possible method for tertiary biological treatment to reduce the residual toxicity with the enhanced biodegradation of the effluents.

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MODELLING OF A THREE-PHASE MEMBRANE REACTOR FOR THE PARTIAL OXIDATION OF PROPANE

  • Criscuoli, Alessandra;Espro, Claudia;Parmaliana, Adolfo;Drioli, Enrico
    • 한국막학회:학술대회논문집
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    • 한국막학회 2003년도 The 4th Korea-Italy Workshop
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    • pp.11-16
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    • 2003
  • A mathematical model describing the performance of a three phase catalytic membrane reactor for the partial oxidation of propane has been developed. The theoretical study pointed out that the recovery of products in the gas phase is strongly related to the membrane hydrophobicity.

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INFLUENCE of SHS-CATALYSTS PHASE STRUCTURE on FORMING PRODUCTS of PARTIAL METHANE OXIDATION

  • Mironenko, A.V.;Rahmetkaliev, K.N.;Mansurov, Z.A.
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 2000년도 하계학술대회 논문집
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    • pp.278-283
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    • 2000
  • The activity of catalysts obtained by self-propagating high temperature synthesis in reaction of partial methane oxidation at atmospheric pressure was investigated. Basing on the compared results of X-ray analysis and gas chromatography analysis of reaction products, the dependence of compounds formation on the phase concentrations in the studied catalyst samples was found.

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