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Simulations 3D via la dynamique numérique des fluides de l'hydrogénation de l'acétone dans des lits garnis de façon aléatoire pour une pompe à chaleur chimique isopropanol-acétone-hydrogène.

3D CFD simulations of acetone hydrogenation in randomly packed beds for an isopropanol–acetone–hydrogen chemical heat pump.

Auteurs : PENG W., XU M., HUAI X., et al.

Type d'article : Article

Résumé

Isopropanol–acetone–hydrogen chemical heat pump (IAH-CHP) is a system having the ability to improve energy-grade and to achieve energy storage simultaneously. Acetone hydrogenation is an important part of IAH-CHP and directly affects the performance of IAH-CHP. In this work, the fully three-dimensional simulations on acetone hydrogenation in randomly packed-bed reactors with small tube-to-particle diameter ratio D/dp were carried out by Computational Fluid Dynamics (CFD). The study focused on the heat and mass transfer characteristics at inter- and intra-particles of the bed. The results indicate that the resistance of mass transfer at intra-particles is maximum in the entire transport process. Particle-to-fluid heat transfer is the main resistance of heat transfer in the bed. In addition, the synergy between transport of components and reaction rate at intra-particles was analyzed for various structural parameters, such as porosity ep, pore diameter do, particle diameter dp and tube-to-particle diameter ratio D/dp, in order to improve the utilization efficiency of catalyst. This study provides a detailed understanding on transport characteristics both at intra-particles and in fluid zone in randomly packed-bed reactors with small D/dp, providing a guideline for catalyst and reactor design for this type of chemical heat pump.

Détails

  • Titre original : 3D CFD simulations of acetone hydrogenation in randomly packed beds for an isopropanol–acetone–hydrogen chemical heat pump.
  • Identifiant de la fiche : 30016926
  • Langues : Anglais
  • Source : Applied Thermal Engineering - vol. 94
  • Date d'édition : 05/02/2016
  • DOI : http://dx.doi.org/10.1016/j.applthermaleng.2015.10.130

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