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    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/26738


    Title: THE ETHYNYLATION KINETICS OF FORMALDEHYDE IN A 3-PHASE SLURRY REACTOR
    Authors: CHANG,FW;CHEN,JM;GUO,JC
    Contributors: 化學工程與材料工程學系
    Keywords: N/A
    Date: 1992
    Issue Date: 2010-06-29 17:35:35 (UTC+8)
    Publisher: 中央大學
    Abstract: Investigations were undertaken on the ethynylation of formaldehyde over a Cu2C2/MgSiO4 in a slurry reactor to study the reaction kineics. The results show that this catalyst is highly selective to the main product 1,4-butynediol. It was found that the reaction rate is first order with respect to catalyst loading and zeroeth order in acetylene partial pressure at above 1.0 kg/cm2. The activation energy was found to be 51.88 kJ/mol ensuring that the rate controlling step is a surface reaction. We chose to use a mechanistic model to explain our experimental data. We postulated a reaction mechanism in which reactants are adsorbed on different active sites respectively. According to this , the following rate expression of Langmuir-Hinshelwood type were obtained for the ethynylation of formaldehyde at 363 K: -r(F) = 2.34*10(-3)WC(F)\1 + 0.47C(F) (kmol/m3 h) We also found that the ethynylation reaction can be expressed with a simple empirical power law model with a reaction order of 0.59 with respect to formaldehyde.
    Relation: CHEMICAL ENGINEERING SCIENCE
    Appears in Collections:[化學工程與材料工程研究所] 期刊論文

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