Studi Hidrogen Desorpsi Pada Magnesium Hydride / Nickel Composite Sebagai Hydrogen Storage Menggunakan Metode Temperature Programmed Desorption (TPD)

Najamuddin, Mohammad (2026) Studi Hidrogen Desorpsi Pada Magnesium Hydride / Nickel Composite Sebagai Hydrogen Storage Menggunakan Metode Temperature Programmed Desorption (TPD). Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Penyimpanan hidrogen menjadi tantangan utama dalam pengembangan energi bersih, dan paduan magnesium Nikel merupakan salah satu kandidat potensial sebagai material penyimpan hidrogen karena kemampuan magnesium hidrida (MgH2) merupakan kandidat material penyimpanan hidrogen padat dengan kapasitas teoritis sekitar 7,6 wt%, namun masih dibatasi oleh kinetika desorpsi yang lambat dan suhu desorpsi yang relatif tinggi (>300 °C). Oleh karena itu, dilakukan variasi komposisi mol MgH2 : NiO sebesar 1:1 dan 2:1 untuk meningkatkan kinetika reaksi dan menurunkan suhu desorpsi melalui efek katalitik Ni. Dalam penelitian ini, karakteristik pelepasan hidrogen dikaji menggunakan metode Temperature Programmed Desorption (TPD), sementara Scanning Electron Microscope (SEM–EDS) digunakan untuk mengamati morfologi permukaan serta menentukan komposisi unsur sampel, dan X-Ray Diffraction untuk mengidentifikasi struktur kristal dan fasa dari material hasil pengujian. Penelitian ini bertujuan untuk memberikan pemahaman mengenai pengaruh katalis dan variasi komposisi MgH₂ : NiO terhadap perilaku desorpsi hidrogen serta peningkatan kinerja penyimpanan hidrogen pada sistem Mg-Ni-H. Hasil penelitian menunjukkan bahwa pada laju pemanasan 3 °C/menit dengan komposisi MgH2: NiO = 2:1 diperoleh kapasitas penyimpanan hidrogen tertinggi sebesar 7,54 wt% dengan suhu puncak desorpsi 470,59 °C serta energi aktivasi desorpsi sebesar 136,80 kJ/mol. Komposisi 2:1 memberikan keseimbangan optimal antara dominasi fase penyimpan hidrogen MgH2 dan peran katalitik Ni, sehingga menghasilkan kapasitas yang lebih tinggi dibandingkan komposisi 1:1. Selain itu, laju pemanasan 3 °C/menit memungkinkan distribusi panas yang lebih merata dan meminimalkan thermal lag, sehingga proses desorpsi berlangsung lebih terkendali dan lebih efektif dibandingkan laju pemanasan 5 dan 10 °C/menit.
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Hydrogen storage remains a major challenge in the development of clean energy technologies, Magnesium nickel are considered promising candidates for solid state hydrogen storage materials. Magnesium hydride (MgH2) exhibits a theoretical hydrogen storage capacity of approximately 7.6 wt%; however, its practical application is limited by slow desorption kinetics and a relatively high desorption temperature (>300°C). Therefore, variations in the molar composition of MgH2 : NiO (1:1 and 2:1) were investigated to enhance reaction kinetics and reduce the desorption temperature through the catalytic effect of Ni.In this study, hydrogen release characteristics were investigated using the Temperature Programmed Desorption (TPD) method, while Scanning Electron Microscopy (SEM–EDS) was employed to observe surface morphology and determine the elemental composition of the samples. Additionally, X-Ray Diffraction (XRD) analysis was conducted to identify the crystal structure and phases of the tested materials. This research aims to provide insights into the effects of catalysts and variations in the MgH2 : NiO composition on hydrogen desorption behavior, as well as the enhancement of hydrogen storage performance in the Mg–Ni–H system. The results indicate that at a heating rate of 3 °C/min with a molar composition of MgH2 : NiO = 2:1, the highest hydrogen storage capacity of 7.54 wt% was achieved, with a peak desorption temperature of 470.59 °C and a desorption activation energy of 136.80 kJ/mol. The 2:1 composition offers an optimal balance between the dominance of the hydrogen-storing MgH2 phase and the catalytic role of Ni, resulting in a higher storage capacity compared to the 1:1 composition. Furthermore, the 3 °C/min heating rate enables more uniform heat distribution and minimizes thermal lag, leading to a more controlled and effective desorption process compared to heating rates of 5 and 10 °C/min.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Komposisi, SEM-EDS, Temperature Programmed Desorption (TPD), Hydrogen Storage, Magnesium Hydride,
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA418.9 Composite materials. Laminated materials. T Technology > TJ Mechanical engineering and machinery > TJ165 Energy storage.
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Mechanical Engineering > 21201-(S1) Undergraduate Thesis
Depositing User:	Mohammad Najamuddin
Date Deposited:	03 Feb 2026 10:02
Last Modified:	03 Feb 2026 10:02
URI:	http://repository.its.ac.id/id/eprint/131888

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