C. Godinez et al., EXPERIMENTAL-STUDY OF THE FRONT-END SELECTIVE HYDROGENATION OF STEAM-CRACKING C-2-C-3 MIXTURE, Chemical engineering and processing, 34(5), 1995, pp. 459-468
Selective hydrogenation of steam-cracking cuts is the industrial proce
ss used to eliminate most of the alkynes, dienes and similar troubleso
me compounds in olefinic streams. The purpose of this paper is present
a kinetic study of the selective hydrogenation of a C-2-C-3 mixture o
ver two palladium/alumina catalysts with front-end variant. Experiment
s have been carried out to monitor the effect of temperature, hydrogen
content in the feed, hydrocarbon volumetric flow and carbon monoxide
content on the corresponding activity and selectivity. The experiments
were performed in an integral plug-flow reactor, and the integral met
hod was used for the kinetic analysis. Data treatment led to apparent
kinetic models. The minimization of the objetive function was made by
the Marquardt algorithm for multiple response, and the continuity equa
tion set was integrated by a fourth-order Runge-Kutta technique. From
the results of the minimization, the most adequate power-law-type mode
ls were selected. The calculated values of the acetylene, ethylene, et
hane, MAPD, propylene and propane molar fractions in the product strea
m are in complete agreement with the experimental ones.