CD Skripsi

Sintesis Silika Tersulfatasi Untuk Produksi Diesel Melalui Hidroksialkilasi-Alkilasi 2-Metilfuran Dan Furfural

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Silica Catalyst (SiO2) is a heterogeneous catalyst that can be used in producing diesel precursors through hydroxyalkylation-alkylation (HAA) reactions. Silica (SiO2) as a catalyst material has a high surface area, good chemical and thermal stability, but lacks better adsorption capacity and catalytic activity, hence the addition of sulfate groups is necessary. The addition of sulfate functional groups to the surface of silica serves as active sites to enhance the catalytic activity of the catalyst. The modification of the silica catalyst morphology to spherical (SNP) and cubic (CNP) shapes in HAA reactions has not been widely studied, thus further research is required to understand this difference. The objective of this study is to synthesize sulfated silica nanostructure catalysts with different morphologies using the Stöber method. The sulfated silica catalyst is obtained through a sol-gel process, then dried at 80°C for 10 hours, sulfated with (NH3)2SO4 solution, and calcined at 400°C. The catalysts are characterized using FE-SEM-EDS, BET-BJH, FT-IR, and NH3-TPD.. The results of FE-SEM-EDS analysis showed spherical and cubic morphology of the catalyst and the distribution of Si, O and S elements found on the catalyst surface. BET-BJH analysis showed a surface area of the SO4/CNP catalyst of 417.13 m2/g and the SO4/SNP catalyst of 471.33 m2/g. FT-IR analysis showed the presence of O-H, Si-O-Si and Si-O functional groups. Acidity analysis using NH3-TPD showed that the SO4/CNP catalyst (1.4 mmol/g) had a lower acidity than SO4/CNP (1.5 mmol/g). Based on the research results, the furfural conversion of 88.45% and the optimum yield of 83.34% were obtained using SO4/CNP catalyst with reaction conditions of 75oC temperature, 8 hours reaction time, 4 wt% catalyst weight and 2-methylfuran:furfural mole ratio of 4:1. GC-MS analysis showed the selectivity of the HAA reaction product, namely 5,5'-(furan-2-ylmethylene)bis(2- Methylfuran) of 93.84%. The results of GC-MS analysis for the hydrodeoxygenation (HDO) reaction showed the selectivity of alkane compounds in the diesel range (C9-C21) or long-chain hydrocarbons of 90.60%, short-chain alkanes of 7.70% and other compounds of 1.88%.

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Ketersediaan

Informasi Detail

Judul Seri

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No. Panggil

2003114945

Penerbit

Pekanbaru : Universitas Riau FMIPA Kimia., 2024

Deskripsi Fisik

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Bahasa

Indonesia

ISBN/ISSN

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Klasifikasi

2003114945

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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