Loading dan Distribusi Nikel Serta Morfologi Katalis NI/γ-Al2O3 Yang Disintesis Dengan Metode Impregnasi

Dyna, Alya Safira (2023) Loading dan Distribusi Nikel Serta Morfologi Katalis NI/γ-Al2O3 Yang Disintesis Dengan Metode Impregnasi. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Katalis Ni/γ-Al2O3 merupakan salah satu katalis heterogen yang dikembangkan pada penelitian ini. Katalis Ni/γ-Al2O3 disintesis dengan metode impregnasi menggunakan variasi loading logam sebesar 2,5%; 5,0%; 10,0%; dan 15,0wt%. Sintesis dilakukan melalui metode impregnasi dengan mencampurkan prekursor logam nikel nitrat heksahidrat dengan support γ-Al2O3, dilanjutkan dengan pengeringan dan kalsinasi. Untuk menguji pengaruh loading nickel pada sifat fisik dan morfologi katalis, maka digunakan beberapa teknik karakterisasi, meliputi analisis SEM/EDX, AAS, XRF, dan XRD. Hasil karakterisasi SEM/EDX mengkonfirmasikan bahwa katalis mengandung unsur Ni, Al, dan O, dengan sebaran Ni yang merata pada permukaan support alumina. Permukaan katalis terlihat tampak kasar, tidak homogen, dan bertekstur yang disebabkan oleh penambahan material aktif (prekursor nikel nitrat). Berdasarkan hasil analisis XRD didapatkan bahwa fasa yang terdeteksi dari pengujian XRD adalah γ-Al2O3 dan NiO. Selain itu, katalis Ni/γ-Al2O3 termasuk berfasa kristalin dan kekristalannya semakin tinggi, yang dibuktikan oleh semakin meningkatnya intensitas puncak yang terdeteksi ketika loading logam pada katalis semakin besar. Hasil analisis menggunakan AAS dan XRF juga menunjukkan hubungan linear, antara loading logam nikel dengan pertambahan kandungan nikel pada katalis walaupun kandungan logam nikel yang terdeteksi tidak 100% berasal dari nikel yang ditambahkan melalui metode impregnasi pada support. Dengan keempat karakterisasi yang telah dilakukan, loading logam pada katalis memiliki hubungan linear antara jumlah nikel yang ditambahkan dengan jumlah nikel terimpregnasi, hal ini akan mempengaruhi banyaknya sisi aktif yang dapat digunakan pada reaksi katalitik. Sehingga dapat dinyatakan pada penelitian ini bahwa katalis 15% Ni/γ-Al2O3 memiliki sifat katalitik terbaik karena jumlah sisi aktif yang terimpregnasi lebih banyak apabila dibandingkan dengan variasi yang lain. Meskipun demikian, masih terdapat faktor lain yang kemungkinan berperan cukup signifikan terhadap jumlah nikel yang terimpregnasi pada pendukung alumina dan perlu untuk diamati lebih lanjut.
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Ni/γ-Al2O3 catalyst is one of the heterogeneous catalysts developed in this study. The Ni/γ-Al2O3 catalyst was synthesized by the impregnation method using a metal loading variation of 2.5%; 5.0%; 10.0%; and 15.0% by weight. Synthesis was carried out through the impregnation method by mixing nickel nitrate hexahydrate with γ-Al2O3 support, followed by drying and calcination. To test the effect of nickel loading on the physical and morphological properties of the catalyst, several characterization techniques were used, including SEM/EDX, AAS, XRF, and XRD analysis. SEM/EDX characterization results confirmed that the catalyst contains elements of Ni, Al, and O, with Ni evenly distributed on the surface of the alumina support. The surface of the catalyst looks rough, inhomogeneous, and textured which is caused by the addition of the active ingredient (nickel nitrate precursor). Based on the results of the XRD analysis, it was found that the detected phases from the XRD test were γ-Al2O3 and NiO. In addition, the Ni/γ-Al2O3 catalyst is classified as a crystalline phase and its crystallinity is higher, as evidenced by the increasing intensity of the peaks detected when the metal loading on the catalyst is greater. The results of the analysis using AAS and XRF also showed a linear relationship between nickel metal loading and the increase in nickel content in the catalyst, although the nickel content detected was not 100% coming from nickel added via the impregnation method on the support. With the fourth characterization that has been carried out, metal loading on the catalyst has a linear relationship between the amount of nickel added and the amount of impregnated nickel, this will affect the number of active sites that can be used in the catalytic reaction. So, it can be stated in this study that the 15% Ni/γ-Al2O3 catalyst has the best catalytic properties because the number of active sites impregnated is greater when compared to the other variations. Even so, there are other factors that may play a significant role in the amount of impregnated nickel on the alumina support and need to be addressed further.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Katalis Nikel Alumina, Impregnasi, dan Karakterisasi. Catalyst Nickel Alumina, Impregnation, and Characterization.
Subjects:	Q Science > QD Chemistry Q Science > QD Chemistry > QD501 Catalysis. Catalysts.
Divisions:	Faculty of Science and Data Analytics (SCIENTICS) > Chemistry > 47201-(S1) Undergraduate Thesis
Depositing User:	Alya Safira Dyna
Date Deposited:	11 Sep 2023 02:14
Last Modified:	11 Sep 2023 02:14
URI:	http://repository.its.ac.id/id/eprint/103977

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