Optimasi Ukuran Kristal Katalis Ni-Cu/ZSM-5 Menggunakan Desain Eksperimen Taguchi

Fahriza, Dinda Nabilla (2026) Optimasi Ukuran Kristal Katalis Ni-Cu/ZSM-5 Menggunakan Desain Eksperimen Taguchi. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Ukuran kristal pada katalis heterogen memiliki pengaruh terhadap luas permukaan dan sisi aktif yang berperan pada reaksi katalisis. Penelitian ini bertujuan untuk menentukan kombinasi parameter sintesis katalis yang optimum dan menganalisis pengaruh setiap faktor terhadap ukuran kristal katalis Ni-Cu/ZSM-5 menggunakan Desain Eksperimen Taguchi Orthogonal Array. Sintesis katalis berbasis ZSM-5 dilakukan melalui metode impregnasi basah dengan memvariasikan tiga faktor dan tiga level. Faktor tersebut meliputi loading logam (2; 4; dan 8 wt%), jenis agen pereduksi (hidrazin hidrat, asam askorbat, dan natrium borohidrida), serta waktu impregnasi (3; 6; dan 12 jam). Pengaruh kombinasi kondisi sintesis terhadap ukuran kristal katalis dianalisis dengan data X-Ray Diffraction (XRD). Evaluasi respon dilakukan dengan pendekatan Signal-to-Noise (rasio S/N) untuk kriteria Smaller-the-Better, yang dilanjutkan dengan Analysis of Variance (ANOVA) untuk mengidentifikasi faktor yang paling dominan. Hasil karakterisasi XRD mengonfirmasi bahwa ukuran kristal yang dihasilkan berada pada rentang 26,374–37,810 nm. Kombinasi parameter yang optimum diperoleh pada perlakuan eksperimen loading logam 8 wt%, agen pereduksi hidrazin hidrat, dan waktu impregnasi 12 jam. Analisis persentase kontribusi dari ANOVA menunjukkan bahwa jenis agen pereduksi merupakan faktor paling dominan 55,920%, sementara waktu impregnasi dan loading logam masing-masing berkontribusi sebesar 30,748% dan 13,332%.
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The crystal size of a heterogeneous catalyst affects its surface area and active sites, which play a role in catalytic reactions. This study aims to determine the optimal combination of catalyst synthesis parameters and to analyze the effect of each factor on the crystal size of the Ni-Cu/ZSM-5 catalyst using a Taguchi Orthogonal Array L9 experimental design. The synthesis of the ZSM-5-based catalyst was carried out using the wet impregnation method by varying three factors at three levels. These factors included metal loading (2; 4; and 8 wt%), the type of reducing agent (hydrated hydrazine, ascorbic acid, and sodium borohydride), and impregnation time (3; 6; and 12 hours). The effect of the combination of synthesis conditions on the catalyst’s crystal size was analyzed using X-ray diffraction (XRD) data. Response evaluation was performed using the signal-to-noise (S/N) ratio approach based on the “Smaller-the-Better” criterion, followed by Analysis of Variance (ANOVA) to identify the most dominant factors. The XRD characterization results confirmed that the resulting crystal sizes ranged from 26.374 to 37.810 nm. The optimal combination of parameters was obtained under experimental conditions of 8 wt% metal loading, hydrazine hydrate as the reducing agent, and an impregnation time of 12 hours. The ANOVA analysis of percentage contributions showed that the type of reducing agent was the most dominant factor at 55.920%, while impregnation time and metal loading contributed 30.748% and 13.332%.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Katalis bimetal, Ni-Cu/ZSM-5, Ukuran kristal, Taguchi, Bimetallic catalyst, Ni-Cu/ZSM-5, Crystal size, Taguchi
Subjects:	Q Science > QD Chemistry > QD75.2 Chemistry, Analytic
Divisions:	Faculty of Science and Data Analytics (SCIENTICS) > Analytical Science and Chemical Instrumentation > 47203-(S1) Undergraduate Thesis
Depositing User:	Dinda Nabilla Fahriza
Date Deposited:	31 Jul 2026 08:40
Last Modified:	31 Jul 2026 08:40
URI:	http://repository.its.ac.id/id/eprint/141196

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