Kinetics and mass transfer of the hydrogenation of 2-methyl-3-butyn-2-ol in a structured Pd/ZnO/Al 2 O 3 reactor
| Autor: | Adrian Meier, Philipp Rudolf von Rohr, Roman Goy, Jonathan Medlock, Sergio Vernuccio |
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| Rok vydání: | 2017 |
| Předmět: |
Mass transfer coefficient
Hydrogen General Chemical Engineering chemistry.chemical_element 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Kinetic energy 01 natural sciences Industrial and Manufacturing Engineering 0104 chemical sciences Volumetric flow rate Catalysis Adsorption chemistry Chemical engineering Mass transfer Environmental Chemistry Organic chemistry 0210 nano-technology Palladium |
| Zdroj: | Chemical Engineering Journal. 316:121-130 |
| ISSN: | 1385-8947 |
| Popis: | This work presents a study of the hydrogenation of 2-methyl-3-butyn-2-ol in flow over a structured catalyst. A porous tubular metal structure is coated with a layer of ZnO/Al 2 O 3 and impregnated with palladium. This reactor is operated with recirculation of the process liquid and continuous supply of hydrogen with co-current upward flow. A Langmuir-Hinshelwood mechanism based on noncompetitive adsorption of hydrogen and organics is used to model the experimental results. The kinetic and adsorption parameters governing the process are estimated in the kinetic regime by means of a numerical optimization procedure. The extension of the model to the mass transfer limited regime, at lower hydrogen flowrates, allows the estimation of an overall mass transfer coefficient K ov . The reaction appears to be strongly dependent on the hydrogen flowrate with estimated K ov lower than 0.25 s −1 in the range of flowrates 0.1–0.5 nL min −1 . The mathematical model, successfully validated, is able to accurately predict the concentration profiles of the species involved in the system at varying temperatures, in both kinetic and mass transfer limited regimes. |
| Databáze: | OpenAIRE |
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