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Hydrogenation of 3‐hydroxypropanal in trickle beds — experimental and modelling
Author(s) -
Zhu Xiao Da,
Hofmann Hanns
Publication year - 1997
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.270200210
Subject(s) - trickle , wetting , trickle bed reactor , pellets , mass transfer , chemistry , diffusion , interphase , kinetics , catalysis , aqueous solution , chemical engineering , thermodynamics , analytical chemistry (journal) , chromatography , materials science , organic chemistry , composite material , physics , genetics , quantum mechanics , biology , political science , law , engineering
Abstract Hydrogenation of 10% aqueous solution of 3‐hydroxypropanal (HPA) was adiabatically carried out over cylindrical Ni/SiO 2 /Al 2 O 3 ‐catalyst pellets (∅ 0.8 + 5 mm) in a trickle bed (∅ 76 × 5200 mm) at 2.6 to 8.0 MPa. The concentration and temperature profiles in the trickle‐bed were measured at different flow rates of liquid. A mathematical model was developed under consideration of heat transfer, interphase mass transfer, intraparticle diffusion and deactivation of catalyst pellets at partial wetting with different wetting geometries. The model fits the measured data satisfactorily when its kinetics of deactivation is modified by a factor determined by regression of data measured in the trickle bed.