Izvorni znanstveni članak
https://doi.org/10.15255/CABEQ.2014.19355
Kinetics and Mass Transfer in the Hydrogenation of 2-((1-benzyl-1,2,3,6-tetrahydropyridin-4-yl)methylene)-5,6-dimethoxy-2,3-dihydroinden-1-one hydrochloride over Pt/C Catalyst
Z. Mastelić Samardžić
; PLIVA Croatia LTD, R&D, Chemistry, Prilaz Baruna Filipovića 25, Zagreb, Croatia
Ž. Jelčić
; PLIVA Croatia LTD, R&D, Chemistry, Prilaz Baruna Filipovića 25, Zagreb, Croatia
S. Zrnčević
orcid.org/0000-0002-8984-5944
; University of Zagreb, Faculty of Chemical Engineering and Technology, Zagreb, Croatia
Sažetak
The liquid phase hydrogenation of 2-((1-benzyl-1,2,3,6-tetrahydropyridin-4-yl)methylene)-5,6-dimethoxy-2,3-dihydroinden-1-one hydrochloride (1) over a 5 % Pt/C industrial catalyst was studied experimentally in a batch slurry reactor using methanol as a solvent. The catalyst was characterized by the adsorption techniques for specific surface area and pore volume, and by XRD for crystallinity. To investigate the intrinsic kinetics of the reaction, the effect of temperature, catalyst loading, hydrogen partial pressure and (1) concentration on the initial rate of hydrogenation was studied. The analysis of initial rate data showed that the gas-liquid, liquid-solid, and intraparticle mass-transfer resistances were not significant. The reaction scheme of (1) hydrogenation was proposed for the kinetic modelling. Apparent rate constants for all hydrogenation steps were calculated using a first order kinetic approach resulting in good agreement between the experimentally obtained and predicted concentrations. From the temperature dependence of rate constants, the activation energies of various reaction steps were calculated. The averaged activation energy of these steps was found to be 31.1 kJ mol–1.
Ključne riječi
catalyst; hydrogenation; diffusion; kinetic modelling
Hrčak ID:
132452
URI
Datum izdavanja:
5.1.2015.
Posjeta: 1.002 *