The use of silicon oxide extracted from rice husk ash as catalyst in magnesium hydrides (MgH<sub>2</sub>) prepared by mechanical alloying method

Malahayati,; Ismail, Ismail; Mursal,; Jalil, Zulkarnain

doi:10.1088/1742-6596/1120/1/012061

Cited by 15 publications

(4 citation statements)

References 9 publications

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“…Comparison of the particle size, kinetic (desorption time) and thermodynamics (desorption time) characteristics with our previous studies [28], showed in the Table 1. The composition used in our previous research is MgH2 + 5 wt% SiO2 + 10 wt% Ni (A), while the 1, it can be seen that the samples with the percentage by weight of nickel is larger the kinetic characteristics of the samples have improved, while the thermodynamic characteristics do not increase.…”

Section: Resultsmentioning

confidence: 56%

Hydrogen Desorption Properties of MgH2 + 10 wt% SiO2 + 5 wt% Ni Prepared by Planetary Ball Milling

Malahayati

Yufita

Ismail

et al. 2021

Bull. Chem. React. Eng. Catal.

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MgH2 is a very hopeful material for application as hydrogen storage material in the solid form. This is due to its reversibility and its ability to store large amounts of hydrogen, which is 7.6 wt%. However, this material still has weaknesses, namely high operating temperature and slow kinetic reactions. Various attempts have been made to overcome this weakness, including downsizing and adding catalyst. In this study, double catalyst was used, namely natural silica extracted from rice husk ash and nickel nano powder, with a composition of MgH2 + 10 wt% SiO2 + 5 wt% Ni. The purpose of this research was to study the effect of downsizing and using these catalysts to the thermodynamic and kinetic properties of the hydrogen storage material MgH2. Samples were prepared by using High Energy Ball Milling (HEBM), with variations in milling time of 1, 5, 10, and 15 hours. The X-ray Diffraction (XRD) pattern showed the presence of an impurity phase in the samples milled for 10 and 15 hours. It also showed a reduction in grain size with increasing milling time. However, agglomeration has occurred in the samples milled for 15 hours. From the Scanning Electron Microscope (SEM) results can be seen that the sample with longer milling time, were homogeneously distribute. Thermal investigation showed that the lowest desorption temperature was achieved in samples with milling time of 5 and 10 hours, namely 287 °C and 288 °C. This study shows that natural silica catalyst plays a role in improving the thermodynamic characteristics of MgH2, while Ni plays a role in improving the kinetic characteristics of MgH2. Copyright © 2021 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).

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Section: Resultsmentioning

confidence: 56%

Hydrogen Desorption Properties of MgH2 + 10 wt% SiO2 + 5 wt% Ni Prepared by Planetary Ball Milling

Malahayati

Yufita

Ismail

et al. 2021

Bull. Chem. React. Eng. Catal.

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“…Important to note, by increasing milling time, the XRD diffraction peaks became broader. The decreases of relative intensity which affected the broader peak, mainly due to the reduction of the particles size and accumulation of microstrain [10][11][12][13]. The profile of iron sand before and after milling as shown in Figure 2, The iron sand profile before the milling process looks grayish, as a result there is still mixing with other associated minerals, especially SiO2.…”

Section: Resultsmentioning

confidence: 99%

Nanomagnetite Extraction from Iron Sand Prepared by Mechanical Alloying Method

Rahwanto

Ismail

Akhyar

et al. 2021

KEM

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In this paper, the magnetic properties of Aceh iron sand was studied. The iron sand was collected from the Syiah Kuala coastal area, Banda Aceh and obtained by mechanical alloying method using planetary ball milling. The mineral compositions were investigated by XRD and XRF analysis tests. The XRF test showed that the sand mostly contain magnetite, Fe3O4 (85.80%) in association with other impurities of SiO2, TiO2, Al2O3 and some others minor minerals. Compare to XRD results, the phase compositions were mainly magnetite (Fe3O4). So, it is consistent with the XRF data. The electron microscopy observation (SEM) showed the fine crystalline structure and the main morphology was micro-crystalline in agglomerate forms. Furthermore, the magnetic properties after 20 hours milling showed the increasing in the coercivity (Hc) and remanent (Br), while the magnetic saturation (Ms) was decreased. This behavior can be explained that nano-Fe3O4 phase after the milling process plays an important role in the magnetic properties of iron sand.

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“…Pure MgH 2 (99.99%, size 50 µm) and Ni (99.99%, size 90 nm) powder were used in this study. Natural silica was obtained from the extraction of RHA using co-precipitation method, as published elsewhere (Malahayati et al, 2018). The samples were milled for 10 hours with the following composition: (A) MgH 2 + 10 wt% SiO 2 + 10 wt% Ni); (B) MgH 2 + 5 wt% SiO 2 + 10 wt% Ni; (C) MgH 2 + 10 wt% SiO 2 + 5 wt% Ni.…”

Section: Methodsmentioning

confidence: 99%

The Effect of Natural Silica from Rice Husk Ash and Nickel as a Catalyst on the Hydrogen Storage Properties of MgH<sub>2</sub>

Malahayati¹,

Yufita²,

Ismail³

et al. 2021

J. Ecol. Eng.

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The use of silicon oxide extracted from rice husk ash as catalyst in magnesium hydrides (MgH₂) prepared by mechanical alloying method

Cited by 15 publications

References 9 publications

Hydrogen Desorption Properties of MgH2 + 10 wt% SiO2 + 5 wt% Ni Prepared by Planetary Ball Milling

Hydrogen Desorption Properties of MgH2 + 10 wt% SiO2 + 5 wt% Ni Prepared by Planetary Ball Milling

Nanomagnetite Extraction from Iron Sand Prepared by Mechanical Alloying Method

The Effect of Natural Silica from Rice Husk Ash and Nickel as a Catalyst on the Hydrogen Storage Properties of MgH<sub>2</sub>

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The use of silicon oxide extracted from rice husk ash as catalyst in magnesium hydrides (MgH2) prepared by mechanical alloying method

Cited by 15 publications

References 9 publications

Hydrogen Desorption Properties of MgH2 + 10 wt% SiO2 + 5 wt% Ni Prepared by Planetary Ball Milling

Hydrogen Desorption Properties of MgH2 + 10 wt% SiO2 + 5 wt% Ni Prepared by Planetary Ball Milling

Nanomagnetite Extraction from Iron Sand Prepared by Mechanical Alloying Method

The Effect of Natural Silica from Rice Husk Ash and Nickel as a Catalyst on the Hydrogen Storage Properties of MgH<sub>2</sub>

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The use of silicon oxide extracted from rice husk ash as catalyst in magnesium hydrides (MgH₂) prepared by mechanical alloying method