Kinetics of the Fischer-Tropsch synthesis
Kinetics of the Fischer-Tropsch synthesis
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DOI：
10.1021/i200020a001
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发表时间：
1983
期刊：
影响因子：
--
通讯作者：
R. Dixit;L. Tavlarides
中科院分区：
文献类型：
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作者：
R. Dixit;L. Tavlarides
费托合成反应的动力学在商业 0.5%/-203 催化剂的内部循环反应器中进行了研究。在200-300℃的温度范围、0.6-1.0MPa的压力范围和0的重时空速范围内，获得了3:1和2:1 H2/CO原料气的稳态转换数。 1-0.5 h" 1. 在表面浸渍催化剂上获得本征动力学数据。结果表明，即使在最高转化水平，传热和传质阻力也可以忽略不计。提出了费托合成的机理，并开发了几种动力学模型。最适合实验数据的动力学模型由下式给出：[2.53 e" 10, 4/flrpcopHs]/[(1+ 0.0782 pco) 2] s'1。该模型基于这样的假设：速率决定步骤是吸附的 CHX 物质的氢化。产品选择性和CO转化率受温度影响很大。
The kinetics of the Fischer-Tropsch synthesis reactions are studied In an Internally recycled reactor over a commercial 0.5%/-203 catalyst. Steady-state turnover numbers are obtained for 3: 1 and 2: 1 H2/CO feed gas over a temperature range of 200-300 C, a pressure range of 0.6-1.0 MPa, and a weight hourlyspace velocity range of0. 1-0.5 h" 1. Intrinsic kinetic data are obtained on surface-impregnated catalyst. It Is shown that even at the highest conversion levels, heatand mass transfer resistances are negligible. A mechanism for the Fischer-Tropsch synthesis Is proposed and several kinetic models are developed. The kinetic model which best fit the experimental data is given by—[2.53 e" 10, 4/flrpcopHs]/[(1+ 0.0782 pco) 2] s'1. This model is based on the assumption that the rate-determining step Is the hydrogenation of adsorbed CHX species. The product selectivity and CO conversion are strongly Influenced by temperature.