Kinetics of Liquid Phase Selective Hydrogenation of Methylacetylene and Propadiene in C3 Streams.

Dynamic control of a selective hydrogenation process with undesired MAPD impurities in the C3-cut streams

“…The Langmuir-Hinshelwood/Hougen-Watson (LHHW) type rate equation was usually used to identify the gas-phase selective hydrogenation reactions [6,8,9,11]. Strictly speaking, this type rate equation is theoretically sound only when the heterogeneous reaction is free of diffusion effect.…”

“…As a routine practice in the industry, the catalyst is periodically regenerated to recover the activity. In the recent years the use of the liquid phase selective hydrogenation process has gradually increased due to the low operating costs and the low rate of the catalyst deactivation [6,7], as a result of low reaction temperature and fast green oil removal by liquid washing. Nevertheless, the catalyst still decays because of carbonaceous deposits, sintering, and abrasion.…”

Estimation of Kinetic Parameters and Simulation of Methylacetylene and Propadiene Liquid-Phase Selective Hydrogenation Reactor Considering the Catalyst Deactivation

“…Uygur et al presented the first kinetic study of selective MA and PD hydrogenation in the liquid phase in a trickle bed reactor. 3 In that research, the governing equations are based on the drip flow regime, and the internal and external mass transfer resistance are considered. Despite the efforts of researchers, only the MA and PD kinetic equations were achieved as the LH-HW model, while defects in the data prevented them from commenting on consecutive PR hydrogenation reactions.…”

“…10 Ahmadi et al optimized the operational parameters such as hydrogen and recycle flow rates and concentration of components in the feedstock via the differential evolution (DE) technique to maximize PR production through controlling the PR selectivity for reducing oligomer formation. 11 In previous studies, nonlinear regression 3,4,12,13 and the DE technique 7 have been used to estimate the kinetic parameters. Recently, with the development of evolutionary algorithms and computational power, it is possible to estimate kinetic parameters with a higher accuracy.…”

Purificación catalítica de 1-buteno: estudio cinético y simulación de un reactor industrial de hidrogenación selectiva

“…El juicio sobre cual es la especie donante de hidrógeno que participa en las reacciones de hidrogenación e hidro-isomerización de hidrocarburos insaturados sobre Pd ha motivado que el modelado de los datos cinéticos contemple ambas formas de adsorción: asociativa ( Kripylo et al, 1975;Boitiaux et al, 1987a;Uygur et al, 1998 ) y disociativa ( Ouchaib et al, 1989;Weimer et al, 1993;Bos & Westerterp, 1993;Goetz et al, 1997 ).…”