Proses penyahoksigenan asid palmitik kepada hidrokarbon seperti diesel
menggunakan mangkin SBA-15 berfungsikan nikel telah dikaji. Pelbagai mangkin
SBA-15 berfungsikan nikel telah disintesis dengan mengubah muatan nikel dari 5 ke
10 wt% pada keadaan persediaan yang sama. Mangkin SBA-15 berfungsikan nikel
telah dicirikan dari segi morfologi dan kandungan kimia dengan menggunakan
mikroskop elektron pengimbas (SEM) dan serakan tenaga sinar X (EDX). Ujian
aktiviti telah dilakukan ke atas mangkin SBA-15 berfungsikan nikel untuk tindak balas
penyahoksigenan asid palmitik dalam reaktor separa kelompok dan disahkan sebagai
pemangkin yang menjanjikan. Di dalam kajian mengenai kesan-kesan keadaan operasi
terhadap penyahoksigenan melalui mangkin SBA-15 berfungsikan nikel, ia mendapati
bahawa penukaran asid palmitik meningkat dengan peningkatan suhu, masa tindak
balas dan muatan mangkin. Tambahan pula, hasil 1-pentadecene dan n-pentadecane
meningkat dengan peningkatan masa tindak balas dan muatan mangkin. Walau
bagaimanapun, pemilihan kedua-dua produk yang dikehendaki menurun dengan
peningkatan suhu, masa tindak balas dan muatan mangkin. Hasil dan pemilihan npentadecane
adalah lebih tinggi daripada 1-pentadecene tanpa mengira keadaan
operasi.
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The solventless deoxygenation of palmitic acid to diesel-like hydrocarbons
using nickel functionalized SBA-15 catalyst was investigated. Various nickel
functionalized SBA-15 catalyst were synthesized by varying the nickel loading from
5 to 10 wt% at the same preparation conditions. The nickel functionalized SBa-15
catalysts were characterized in terms of its morphology and chemical compositions by
means of scanning electron microscope (SEM) and energy dispersive X-ray (EDX)
respectively. Activity test was performed on the nickel functionalized SBA-15
catalysts for solventless deoxygenation reaction of palmitic acid in a semi batch reactor
and was confirmed as a promising catalyst. In the study on the effects of the operating
conditions on the deoxygenation reaction via nickel functionalized SBA-15 catalysts,
it was found that palmitic acid conversion increased with increasing temperature,
reaction time and catalyst loading. Furthermore, yield of 1-pentadecene and npentadecane
increased with increasing reaction time and catalyst loading. However,
the selectivities of both desired products decreased with increasing temperature,
reaction time and catalyst loading. The yield and selectivity of n-pentadecane is higher
than 1-pentadecene regardless of the operating conditions.
Deoxygenation of palmitic acid to diesel-like hydrocarbons via NI-SBA-15 / Nur Aziah Saadon