Analisis Aktivasi MgO pada Nickel Matte Slag Menggunakan Alkali Fusion dengan Variasi Temperatur dan Waktu Tahan untuk Aplikasi Carbon Capture

Hamdani, Muhammad Naufal (2026) Analisis Aktivasi MgO pada Nickel Matte Slag Menggunakan Alkali Fusion dengan Variasi Temperatur dan Waktu Tahan untuk Aplikasi Carbon Capture. Other thesis, Institut Teknologi Sepuluh Nopember.

Text 5011221113-Undergraduate_Thesis.pdf - Accepted Version Restricted to Repository staff only Download (7MB) | Request a copy

Abstract

Peningkatan konsentrasi karbon dioksida (CO₂) di atmosfer mendorong pengembangan teknologi carbon capture yang memanfaatkan limbah industri sebagai material penyerap karbon. Salah satu limbah yang berpotensi digunakan adalah nickel matte slag karena mengandung MgO yang dapat bereaksi dengan CO₂ melalui proses mineral carbonation. Namun, MgO dalam slag umumnya terikat dalam matriks silikat sehingga memiliki reaktivitas yang rendah. Penelitian ini bertujuan untuk menganalisis pengaruh temperatur dan waktu tahan pada proses alkali fusion menggunakan NaOH (molten) terhadap aktivasi MgO pada nickel matte slag untuk aplikasi carbon capture. Proses alkali fusion dilakukan menggunakan NaOH dengan variasi temperatur 500°C, 600°C, 700°C, dan 800°C serta waktu tahan 1, 2, dan 4 jam. Karakterisasi dilakukan menggunakan XRF, XRD, dan SEM-EDX, sedangkan performa karbonasi dievaluasi melalui metode aqueous-pressurized carbonation. Hasil penelitian menunjukkan bahwa peningkatan temperatur dan waktu tahan meningkatkan efektivitas aktivasi yang ditunjukkan oleh terdapat nilai Si removal paling optimal sebesar 80,18% dan rasio massa Mg/Si paling optimal sebesar 4,04. Analisis XRD menunjukkan berkurangnya intensitas fasa silikat serta terbentuknya fasa kaya magnesium yang lebih reaktif berupa MgO (Periclase). Hasil SEM-EDX memperlihatkan perubahan morfologi menjadi lebih berpori setelah proses aktivasi. Kondisi optimum diperoleh pada temperatur 800°C dengan waktu tahan 4 jam, yang menghasilkan carbonation efficiency sebesar 10,71%. Hasil tersebut menunjukkan bahwa metode alkali fusion efektif meningkatkan reaktivitas MgO pada nickel matte slag sehingga berpotensi digunakan sebagai material alternatif untuk aplikasi carbon capture.
=====================================================================================================================================
Rising concentrations of carbon dioxide (CO₂) in the atmosphere are driving the development of carbon capture technologies that utilize industrial waste as a carbon-absorbing material. One type of waste with potential for this application is nickel matte slag, as it contains MgO that can react with CO₂ through the process of mineral carbonation. However, the MgO in the slag is generally bound within a silicate matrix, resulting in low reactivity. This study aims to analyze the effects of temperature and holding time in the alkali fusion process using molten NaOH on the activation of MgO in nickel matte slag for carbon capture applications. The alkali fusion process was conducted using NaOH (molten) at temperatures of 500°C, 600°C, 700°C, and 800°C, with holding times of 1, 2, and 4 hours. Characterization was performed using XRF, XRD, and SEM-EDX, while carbonation performance was evaluated via the aqueous-pressurized carbonation method. The results showed that increasing temperature and holding time enhanced the effectiveness of activation, as evidenced by the most optimal Si removal value of 80.18% and the most optimal Mg/Si mass ratio of 4.04. XRD analysis showed a decrease in the intensity of the silicate phase and the formation of a more reactive magnesium-rich phase in the form of MgO (periclase). SEM-EDX results revealed a change in morphology toward a more porous structure after the activation process. Optimal conditions were achieved at a temperature of 800°C with a holding time of 4 hours, resulting in a carbonation efficiency of 10.71%. These results indicate that the alkali fusion method effectively enhances the reactivity of MgO in nickel matte slag, making it a potential alternative material for carbon capture applications.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Nickel Matte Slag, MgO, Alkali Fusion, Carbon Capture, Mineral Carbonation, Nickel Matte Slag, MgO, Alkali Fusion, Carbon Capture, Mineral Carbonation.
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA418.16 Materials--Testing. T Technology > TA Engineering (General). Civil engineering (General) > TA455 Carbon. Nanotubes. T Technology > TN Mining engineering. Metallurgy > TN799.N6 Nickel--Metallurgy
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis
Depositing User:	Muhammad Naufal Hamdani
Date Deposited:	24 Jul 2026 02:42
Last Modified:	24 Jul 2026 02:42
URI:	http://repository.its.ac.id/id/eprint/136715

Actions (login required)

View Item