Sintesis Silika Mesopori Dengan Templat Lerak (Sapindus Rarak) Sebagai Pendukung Katalis Nikel Oksida Untuk Reaksi Deoksigenasi

Agustina, Khawiyatur Riv'ah (2013) Sintesis Silika Mesopori Dengan Templat Lerak (Sapindus Rarak) Sebagai Pendukung Katalis Nikel Oksida Untuk Reaksi Deoksigenasi. Masters thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Silika mesopori (SM) disintesis dengan templat ekstrak lerak (Sapindus rarak). Tujuan penelitian untuk mengetahui efektivitas ekstrak lerak sebagai templat alami terhadap sintesis SM. Ekstraksi lerak dilakukan dengan metode maserasi selama 2 hari. Hasil ekstrak lerak akan digunakan untuk sintesis SM. Sintesis SM dilakukan dengan kombinasi metode sol-gel hidrotermal pada suhu 100 °C selama 24 jam. Selanjutnya padatan SM dimodifikasi dengan nikel yang divariasiakan sebanyak 5, 10, 15 dan 20% berat, proses modifikasi Ni pada SM dilakukan dengan metode impregnasi. Hasil karakterisasi XRD menunjukkan material amorf. Hasil SEM dan fisisorpsi nitrogen menunjukkan morfologi yang tidak teratur dengan luas permukaan sebesar 587 m2/g dan ukuran pori 6,07 nm. Adanya pemuatan oksida logam dapat menurunkan luas permukaan dan ukuran pori silika mesopori. Aktivitas katalitik dari NiO/SM digunakan untuk reaksi deoksigenasi limbah minyak goreng pada suhu 350 °C selama 4 jam. Hasil reaksi deoksigenasi menunjukkan selektivitas hidrokarbon katalis 20%NiO/SM sebesar 73,91% yang disebabkan oleh ukuran pori dan keasaman katalis.

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Mesoporous silica (MS) was synthesized with the lerak (Sapindus rarak) extract template. The purpose of the study was to determine the effectiveness of lerak extract template for the synthesis of MS. Lerak extraction was carried out by maceration method for 2 days. The results of the extraction will be used for synthesis of MS. MS synthesis was carried out by a combination of hydrothermal sol-gel methods at 100 °C for 24 hours. Furthermore, MS was modified with nickel which was varied as much as 5, 10, 15 and 20 wt%, the Ni modification process on MS was carried out by the impregnation method. The low-angle XRD characterization results showed unordered mesostructure. SEM and nitrogen physisorp results showed an irregular morphology with a surface area of 587 m2/g and a pore size of 6.07 nm. Metal oxide loading can reduce the surface area and pore size of mesoporous silica. The catalytic activity of NiO/MS was used for the deoxygenation reaction of waste cooking oil at 350 °C for 4 hours. The results of the deoxygenation reaction showed a hydrocarbon selectivity of the 20%NiO/SM catalyst is 73.91% which was caused by the mesoporous pore size and acidity of the catalyst.

Keywords: Mesoporous silica, Natural template, Lerak

Item Type:	Thesis (Masters)
Uncontrolled Keywords:	Mesoporous silica, Natural template, Lerak
Subjects:	Q Science Q Science > QD Chemistry > QD501 Catalysis. Catalysts. T Technology > TP Chemical technology
Divisions:	Faculty of Science and Data Analytics (SCIENTICS) > Chemistry > 47101-(S2) Master Thesis
Depositing User:	Khawiyatur Riv'ah Agustina
Date Deposited:	06 Aug 2023 14:26
Last Modified:	06 Aug 2023 14:26
URI:	http://repository.its.ac.id/id/eprint/103878

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