Nickel
incorporated mesostructured cellular foam (NiMCF) was studied as a catalyst for
palmitic acid deoxygenation to primarily synthesize n-pentadecane and
1-pentadecene. The kinetic behaviour was tested in a temperature range from 280
to 300°C.
The reaction was
found to follow a first order kinetic model with respect to the palmitic acid
with an activation energy of 111.57 KJ/Mol. In the reusability study, it was
found that the average reduction
in palmitic acid conversions was about 40.5%, which indicated
the occurrence of catalyst deactivation during the deoxygenation. Fresh and
spent catalysts were characterized by means of scanning electron microscope.
Energy-dispersive
X-ray spectroscopy and X-ray powder diffraction correlate their characteristics
with catalytic activity and to identify the main catalyst deactivation
mechanism. The catalyst deactivation was mainly due to phase transformation of
metallic nickel (Ni0) to nickel ion (Ni2+) and the deposition of organic
molecules on the catalyst during the deoxygenation.
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