1 research outputs found
Impact of Zr Incorporation into the Ni/AlSBA-15 Catalyst on Its Activity in Cellulose Conversion to Hydrogen-Rich Gas
This work focused
on the investigation of the effect of zirconium
incorporation into the structure of the Ni/AlSBA-15 catalyst on its
performance in high-temperature conversion of cellulose (the main
component of lignocellulosic feedstock) to hydrogen-rich gas. The
modified supports were prepared by direct incorporation of zirconium
and impregnation methods. The obtained results exhibited that introduction
of zirconium into the structure of Ni/AlSBA-15 allowed for a considerable
increase in the amount of hydrogen produced in the studied process
in comparison to unmodified Ni/AlSBA-15 material. The characterization
of physicochemical properties of the investigated materials (X-ray
diffraction, scanning electron microscopy–energy-dispersive
X-ray spectroscopy, time-of-flight secondary ion mass spectrometry,
temperature-programmed reduction, temperature-programmed desorption
of ammonia, etc.) showed that the preparation of mesoporous Ni/ZrAlSBA-15
with the use of the direct synthesis method led to obtaining the catalyst
with a higher surface area and pore volume and smaller crystallites
of an active phase in comparison to the material containing nickel
supported on ZrAlSBA-15 with zirconium introduced by impregnation.
Despite that the mesoporous catalyst prepared by impregnation possessed
higher acidity, its structure underwent partial collapse during the
preparation procedure