کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
57111 47106 2009 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of structure and thermal properties of a Fischer–Tropsch catalyst in a fixed bed
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
پیش نمایش صفحه اول مقاله
Effect of structure and thermal properties of a Fischer–Tropsch catalyst in a fixed bed
چکیده انگلیسی

A 2D G-S pseudo-homogeneous steady-state plug flow, non-isobaric and non-isothermal model is used to investigate the effects of operating conditions and catalyst thermal properties on the behaviour of a multi-tubular fixed bed for Fischer–Tropsch synthesis. This simulator allows observing, quantifying and discussing the influences of the gas velocity, the tube diameter, the type of catalyst used (monolithic foam or extrudates) and the heat conductivity of the support (alumina or silicon carbide). The observed responses are the effective thermal parameters of the catalytic bed, the radial and axial temperature profiles and the global performances of the reactor (yield, productivity and selectivity). Thermal properties of the support exhibit a strong influence when low fluid velocities and/or large tube diameters are employed. Because of the high void fraction of a foam structure these effects are less pronounced than with packed beds. This structural difference allows a wider range of operating conditions in terms of fluid velocity and tube diameter but underlines the necessity to tune the void fraction of a foam bed to obtain the best compromise between its volumetric catalytic activity and a good thermal behaviour.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Catalysis Today - Volume 147, Supplement, September 2009, Pages S305–S312
نویسندگان
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