Tetralin Hydrogenation over Ir-Pt/SBA-15. Optimization by experimental desing.
Date
2015
Journal Title
Journal ISSN
Volume Title
Publisher
Univesidsad Tecnológica Nacional.
Abstract
Bimetallic catalysts have received considerable attention for hydrotreating (HDT)
because they show high activity. The features of the catalysts here studied are going to
be correlated with their catalytic performance in the hydrogenation of tetralin at mild
conditions. The final goal is to find the optimal proportion of each metal in order to be
more active and the best reaction conditions (temperature and amount of catalyst). The
statistical experiments design is the process of planning an experiment to obtain
appropriate data that can be analyzed by statistical methods, to produce concrete and
valid conclusions. One of the main advantages in the response curve is to visualize the
response for all levels of the experimental factors Experiment design response surface
methodology (RSM) is used in this work to model and to optimize the process. Platinum
and Iridium nanoparticles were incorporated into SBA-15 support by the wet co impregnation method. Ir content was set as 1wt. % and Pt was varied from 0 to 1wt. %.
The catalysts were characterized by XRD, BET, XPS, TEM, ICP and TPR. XRD profiles
are characteristic of the two-dimensional p6mm hexagonal mesostructure with d100
spacing of 10.16 nm; where the d100 spacing upon Ir and Pt incorporation were quite
similar to pristine SBA-15. The TEM images and XPS demonstrate that the metal
particles were mainly present inside the porous and XPS and TPR corroborated the
reduced state of the metals. The catalytic activity was measured in a 4563Parr reactor
at 15 atm of hydrogen and 360 rpm. Feed consisted in 50 mL of tetralin in Dodecane,
the amount of tetralin is set according to the ratio of catalyst mass/mass reagent
corresponding to each reaction. The application of this methodology allows a better
understanding of the influence of the different factors: content of metal on catalyst (A),
relationship: mass of catalyst/reagent mass (B) and reaction temperature (C), on two
responses: conversion at 3 h and at 5 h of reaction time. These factors were carefully
selected taking account the influence of the parameters in the reaction. The design was
analyzed by Statgraphics and Statistica Soft. We found that, the variable Catalyst has
the best influence over the Conversion at the 95.0% confidence level, according to the
Pareto.
Description
Keywords
Iridium-Platinum containing SBA-15, Tetralin Hydrogenation, Experimental Desing
Citation
XXIV International Materials Research Congress 2015 .
Endorsement
Review
Supplemented By
Referenced By
Creative Commons license
Except where otherwised noted, this item's license is described as info:eu-repo/semantics/openAccess