CD Skripsi

Sintesis Katalis Cao-Sio2/Fe2o3 Dari Cangkang Kerang Darah Dan Fly Ash Cangkang Sawit Untuk Aplikasi Pada Sintesis Biodiesel Dari Cpo

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CaO catalyst impregnated with SiO2 (silica) is a heterogeneous catalyst that is widely used in transesterification reactions for biodiesel synthesis. However, the yield of biodiesel produced is not optimal, due to the small surface area and stability of the catalyst, requiring modification with other types of metal oxides such as Fe₂O₃. Fe₂O₃ has high porosity and stability thus can increase the surface area and catalytic activity catalyst. The purpose of this research is to synthesize and characterize CaO-SiO₂ 5% catalyst derived from blood clam shells and fly ash palm kernel shell modified Fe₂O₃ with variations ration of the CaO: Fe₂O₃ of 6:1, 6:3, 6:5) using the wet impregnation method. The CaO-SiO₂/Fe₂O₃ catalysts were subjected to a sequence of analyses, including BET, XRD, XRF, and FTIR. The BET analysis showed that the surface area of the CaO-SiO2 5% catalyst without Fe2O3 modification was 9.259 m2g-1, while after Fe2O3 modification with a CaO: Fe₂O₃ ratio of (6:1, 6:3) it increased to 15.213 m2g-1 and 24.232 m2g-1, respectively. The surface area of the CaO-SiO₂/Fe₂O₃ catalyst (6:5) decreased to 9.466 m2g-1. XRD analysis showed the presence of portlandite (Ca(OH)2), lime (CaO), maghemite (γ-Fe2O3) dan hematite (α-Fe2O3). The results of XRF analysis showed that the content of CaO and SiO2 decreased as the Fe2O3 content in the catalyst increased. FTIR analysis showed the presence of O-H; O-C-O; C-O; Si-O-Si; Si- O-Ca; Fe-O; and Ca-O groups. The CaO-SiO₂/Fe₂O₃ catalyst was applied in two- stage transesterification reaction (methoxy separation followed by transesterification) for biodiesel synthesis through optimization using Response Surface Methodology (RSM) design with variation of catalyst weight, mol ratio of oil: methanol and transesterification reaction time. Based on the optimum results with RSM using CaO-SiO₂/Fe₂O₃ (6:3) catalyst, the highest biodiesel yield of 96.736% was obtained with 120 min methanol catalyst reaction conditions, 2% w/w catalyst weight, 1:9 oil: methanol mole ratio, and 90 min transesterification reaction time. The characteristics of biodiesel produced from CaO-SiO₂/Fe₂O₃ catalysts have water content, specific gravity, viscosity and residual carbon that generally meet the quality requirements of SNI 7182-2015, except for acid number.

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Ketersediaan

Informasi Detail

Judul Seri

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No. Panggil

2003113828

Penerbit

Pekanbaru : Universitas Riau FMIPA Kimia., 2024

Deskripsi Fisik

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Bahasa

Indonesia

ISBN/ISSN

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Klasifikasi

2003113828

Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subjek

KIMIA

Info Detail Spesifik

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Pernyataan Tanggungjawab

Mutia

Versi lain/terkait

Lampiran Berkas

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