Abstracts Book - IMRC 2018

• SF3-P039
EFFECTS OF FAU-TYPE ZEOLITE SYNTHESIS PARAMETERS ON
CATALYTIC CONVERSION OF 5-HYDROXYMETHYLFURFURAL (5-
HMF)
Nathalia Ramirez Bocanegra 1 , David Alejandro de Haro del Río 1 , Javier Rivera de la Rosa 1 ,
Carlos Javier Lucio Ortiz 1 , Pablo Cubillas Gonzalez 2
1 Universidad Autónoma de Nuevo León, Facultad de Ciencias Químicas, División de estudios
de posgrado, Mexico. 2 Durham University, Department of earth science, United Kingdom,
Channel Islands & Isle of Man.
Hierarchically structured zeolites can reduce diffusion limitations in catalytic
reactions and therefore kinetics in a chemical reaction. The synthesis of zeolites
with hierarchical porous structures is mainly characterized by the use of
structure directing agents (SDAs). Nevertheless it is possible to obtain this
hierarchy through the manipulation of variables such as temperature (T) and
time (t) of crystallization and the molar ratio Si/Al. Starting a gel composition
5Na 2 O:0.16Al 2 O 3 :XSiO 2 :85H 2 O we obtained the desired hierarchical structure,
with surface area of 195.55 m 2·g -1 , under conditions Si/Al ratio = 13.75, T = 65°C
and t = 96h. With a second initial gel 8Na 2 O:XAl 2 O 3 :10SiO 2 :400H 2 O Faujasite
zeolite phase with microporous structure was obtained, showing a surface area
of 540.83 m 2·g -1 , at Si/Al = 5, T = 100°C and t = 8h. Synthetized zeolites by
Incipient wetness impregnation method were prepared to support metallic Pd-
Ru and Pt-Ru, whose precursors were Pd(NO 3 )·XH 2 O, RuCl 3·XH 2 O and
H 2 PtCl 6·6H 2 O. Catalysts have been characterized by several techniques as
Scattering Electron Microscopy (SEM), X-Ray Diffraction (XRD), IR spectroscopy
(FTIR), Nitrogen Physisorption (BET), in order to evaluate their performance
(activity and selectivity) as a direct relationship between the material structure,
porosity and surface area, defined by Si/Al ratio which in turn it influences the
material’s acidity degree and reaction kinetics. This materials have shown a
great potential to be tested in the dehydrogenation reaction of 5-
hydroxymethylfurfural (5-HMF) in a batch reactor. The characterization results
are shown in the following figures. Figure 1. XRD patterns, N 2 Sorption isotherms
for FAU type zeolite. Initial gel composition 5Na 2 O:0.16Al 2 O 3 :XSiO 2 :85H 2 O.
Conditions: T=65°C, Si/Al ratio=13.75, t=96 hours