Sintesis Al-MCM-41 Dari Kaolin Dengan Variasi Rasio Silika Alumina

Nareswari, Nabila Argya (2021) Sintesis Al-MCM-41 Dari Kaolin Dengan Variasi Rasio Silika Alumina. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Al-MCM-41 telah berhasil disintesis dengan variasi rasio silika alumina yaitu 30, 50, 70 dan 90. Al-MCM-41 disintesis dari kaolin sebagai sumber alumina pada rasio 10Na2O : 2(x)SiO2 : 2Al2O3 : 1800H2O, x = 30, 50, 70, dan 90 dengan penambahan CTABr sebagai pengarah mesopori. Padatan dikarakterisasi dengan XRD, FTIR, adsorpsi-desorpsi N2, IR-piridin, dan SEM-EDX. Hasil XRD menunjukkan bahwa Al-MCM-41 mempunyai struktur amorf dengan terbentuknya pori heksagonal yang teratur. Analisa FTIR menunjukkan vibrasi Si-OH pada bilangan gelombang sekitar 970 cm-1 sebagai ciri khas karakteristik Al-MCM-41. Sampel Al-MCM-41 mempunyai bentuk morfologi bulat dan teraglomerasi dengan ukuran partikel sekitar 1,1-3,7µm. Semua Al-MCM-41 merupakan material mesopori, dimana sampel Si/Al = 90 mempunyai nilai tertinggi pada luas permukaan mesopori (Smeso) sebesar 623,5 m2/g, sedangkan sampel Si/Al = 70 mempunyai volume mesopori (Vmeso) sebesar 0,495 cm3/g. Sampel Al-MCM-41 dengan rasio Si/Al = 30 menunjukkan jumlah situs asam tertinggi sebesar 0,299 mmol/g. ===================================================================================================== Al-MCM-41 has been successfully synthesized with various ratios of silica alumina 30, 50, 70 and 90. Al-MCM-41 was synthesized from kaolin as alumina source at a ratio of 10Na2O: 2(x) SiO2: 2Al2O3: 1800H2O, x = 30, 50, 70, and 90 with the addition of CTABr as a mesoporous template. Sample Al-MCM-41 were characterized by XRD, FTIR, N2 adsorption-desorption, IR-pyridine, and SEM-EDX. XRD results show that Al-MCM-41 has an amorphous structure with the formation of regular hexagonal pores. FTIR analysis showed the Si-OH vibration at a wavenumber of around 970 cm-1 as a characteristic of Al-MCM-41. The Al-MCM-41 sample has a spherical and agglomerated morphology with a particle size of about 1.1-3.7µm. All Al-MCM-41 are mesoporous materials, where the Si/Al = 90 sample has the highest value on the mesoporous surface area (Smeso) of 623.5 m2/g, while the Si/Al = 70 sample has a mesoporous volume (Vmeso) of 0.495 cm3/g. Sample Al-MCM-41 with variation Si/Al = 30 indicates the highest number of acid sites is 0.299 mmol/g.

Item Type: Thesis (Undergraduate)
Uncontrolled Keywords: kaolin, mesopori, Al-MCM-41, keasaman, rasio Si/Al, kaolin, mesoporous, Al-MCM-41, acidity, Si/Al ratio.
Subjects: Q Science
Q Science > QD Chemistry
Q Science > QD Chemistry > QD181.S6 A4 Aluminum silicates
Q Science > QD Chemistry > QD501 Catalysis. Catalysts.
Divisions: Faculty of Science and Data Analytics (SCIENTICS) > Chemistry > 47201-(S1) Undergraduate Thesis
Depositing User: Nabila Argya Nareswari
Date Deposited: 24 Aug 2021 06:38
Last Modified: 24 Aug 2021 06:38
URI: https://repository.its.ac.id/id/eprint/90082

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