Studi Aktivitas Katalis Co/γ-Al2O3 dan Ni/γ-Al2O3 pada Reaksi Deoksigenasi Biodiesel Kelapa Sawit untuk Produksi Green Diesel

Pratama, Jeesica Hermayanti (2024) Studi Aktivitas Katalis Co/γ-Al2O3 dan Ni/γ-Al2O3 pada Reaksi Deoksigenasi Biodiesel Kelapa Sawit untuk Produksi Green Diesel. Masters thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Katalis Co/γ-Al2O3 dan Ni/γ-Al2O3 yang disintesis dengan metode wet impregnation menunjukkan kesesuaian fasa dari difraktogram XRD. Morfologi acak dan tidak beraturan pada katalis dengan distribusi unsur yang cukup merata terlihat melalui analisis SEM-EDX. Analisis EDXRF mengkonfirmasi persentase berat logam yang terimpregnasi pada support γ-Al2O3. Reduksibilitas katalis yang dianalisis melalui profil H2-TPR menunjukkan peningkatan reduksi seiring peningkatan loading logam. Material katalis termasuk sebagai mesopori sesuai karakteristik support. Keberhasilan aplikasi katalis pada produksi green diesel melalui reaksi deoksigenasi memerlukan kondisi reaksi yang sesuai, sehingga optimasi parameter reaksi penting dilakukan. Oleh karena itu, penelitian ini bertujuan untuk mempelajari aktivitas katalis Co/γ-Al2O3 dan Ni/γ-Al2O3 pada reaksi deoksigenasi biodiesel kelapa sawit menjadi green diesel melalui variasi waktu reaksi, loading logam, massa katalis, dan jenis logam. Kedua jenis katalis terbukti mampu mengkonversi biodiesel kelapa sawit menjadi green diesel dengan range C8-C20 berdasarkan analisis dengan GC-MS. Optimasi reaksi menunjukkan penggunaan waktu reaksi selama 3 jam, loading kobalt 10,00 wt%, dan massa katalis 1,00 wt% menghasilkan kondisi reaksi terbaik. Uji stabilitas katalis 10,00% Co/γ-Al2O3 menunjukkan bahwa katalis mengalami penurunan konversi secara bertahap selama tiga kali siklus reaksi, yaitu 62,51; 53,29; dan 15,80%. Perlakuan regenerasi katalis setelah siklus ketiga berhasil mengembalikan sebagian sisi aktif katalis dengan perolehan konversi sebesar 34,00%. Hal ini menunjukkan katalis berbasis kobalt dan nikel berpotensi diaplikasikan pada produksi green diesel dengan pertimbangan kondisi optimal yang telah dipelajari.
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The Co/γ-Al2O3 and Ni/γ-Al2O3 catalysts synthesized via the wet impregnation method, exhibited phase compatibility as confirmed by XRD diffractograms. SEM-EDX analysis revealed random and irregular morphology with evenly distributed elements in the catalysts. EDXRF analysis confirmed the percentage of metal impregnated on the γ-Al2O3 support. The reducibility of the catalysts, analyzed through H2-TPR profiles, showed increased reduction with higher metal loading, indicating an increase in active sites on the catalysts. The catalysts were characterized as mesoporous based on the support characteristics. The successful application of the catalysts in the production of green diesel via deoxygenation reactions requires appropriate reaction conditions, making the optimization of reaction parameters crucial. Therefore, this study aims to investigate the catalytic activity of Co/γ-Al2O3 and Ni/γ-Al2O3 in the deoxygenation reaction of palm oil biodiesel to green diesel by varying reaction time, metal loading, catalyst mass, and metal type. Both types of catalysts are proven to convert palm oil biodiesel into green diesel within the C8-C20 range based on GC-MS analysis. Reaction optimization shows that the best reaction conditions are achieved with a reaction time of 3 hours, cobalt loading of 10.00 wt%, and catalyst mass of 1.00 wt%. The stability test of the 10.00% Co/γ-Al2O3 catalyst demonstrates a gradual decline in conversion over three reaction cycles, yielding 62.51%, 53.29%, and 15.80% conversion, respectively. Catalyst regeneration treatment after the third cycle successfully restores some of the active sites of the catalyst, achieving a conversion of 34.00%. This indicates that cobalt and nickel-based catalysts have potential for application in green diesel production, considering the optimal conditions studied.

Item Type:	Thesis (Masters)
Uncontrolled Keywords:	Katalis, Deoksigenasi, Green Diesel, Biodiesel Catalyst, Deoxygenation, Green Diesel, Biodiesel
Subjects:	Q Science > QD Chemistry > QD501 Catalysis. Catalysts. T Technology > TP Chemical technology > TP359.B46 Biodiesel fuels.
Divisions:	Faculty of Science and Data Analytics (SCIENTICS) > Chemistry > 47101-(S2) Master Thesis
Depositing User:	Jeesica Hermayanti Pratama
Date Deposited:	08 Aug 2024 04:22
Last Modified:	08 Aug 2024 04:22
URI:	http://repository.its.ac.id/id/eprint/112973

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