Strengthening external magnetic fields with activated carbon graphene for increasing hydrogen production in water electrolysis

Purnami,; Hamidi, Nurkholis; Sasongko, Mega Nur; Widhiyanuriyawan, Denny; Wardana, I.N.G.

doi:10.1016/j.ijhydene.2020.05.148

Cited by 29 publications

(20 citation statements)

References 39 publications

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“…Based on Table 1, 43mT DMF is superior to the static 45.7mT exposure with and without the laser involvement in a longer period done by 37 . With the same period and flux magnitude, the work performed by 38 is comparable to the DMF results. However, DMF still superior as the 38 needs activated carbon addition to achieve equivalent hydrogen volume.…”

Section: Resultsmentioning

confidence: 68%

“…37 The addition of algal activated carbon has strengthened the magnetic field and doubled the hydrogen production compared to conventional electrolysis. 38 The foam electrodes under the ambiance of a magnetic field are able to reduce the energy consumption of WE by about 3,4%. 39 The use of a porous electrode in an electrical field has been proven to increase electrolysis efficiency showed by the 2.5% decrease in voltage input needed.…”

Section: Introductionmentioning

confidence: 99%

“…The previous studies mentioned [37][38][39][40][41]43 are explaining the effect of the magnetic field to increase hydrogen production by WE. However, the exposed magnetic fields in the study of [37][38][39][40][41] were constant.…”

Section: Introductionmentioning

confidence: 99%

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Enhancement of hydrogen production using dynamic magnetic field through water electrolysis

Purnami

Hamidi

Sasongko

et al. 2022

Intl J of Energy Research

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Summary Static magnetic field (SMF) application in water electrolysis increases hydrogen production. However, the effect of the dynamic magnetic field (DMF) in water electrolysis is rarely studied. This study utilizes DMF to increase hydrogen production in water electrolysis. DMF was generated by rotating a plate‐shaped magnet. As a result, DMF produces 23.1 mL H2, which almost doubled the 12.1 mL H2 of SMF. DMF increases the chance of hydrogen formation by weakening the covalent bond, hydrogen bond, and increase the ion transfer mobility as a result of additional magnetic field strength. This phenomenon consistent with the Faraday's law where fluctuating magnetic field generates an electromotive force that increases electric current density. The high electric current density alters hydroxide ion mobility as the interchanging magnetic force field by DMF increases the ions collision chance. The additional magnetic force by DMF has aligned more water molecules than DMF. Consequently, more water molecule dipoles are exposed during electrolysis. Hence, DMF eases the water‐splitting process by shaking the water molecules, which continuously aligns the dipole and also energizes the water molecules. The energized water with higher kinetic energy is easier to split as the required ionization energy has reduced. This happens as the result of the spin‐pair magnetic energy conversion that is stimulated by external magnetic field. The increase in rotational speed of magnetic rods does not significantly increase hydrogen evolution reaction and lower the electrolysis efficiency. This indicates the presence of DMF is more important for water electrolysis performance than the rotational speed of DMF. Conclusively, DMF enhances hydrogen evolution reaction by an increase in water kinetic energy and increase in ion transfer chance through dipole exposition.

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Section: Resultsmentioning

confidence: 68%

Section: Introductionmentioning

confidence: 99%

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Enhancement of hydrogen production using dynamic magnetic field through water electrolysis

Purnami

Hamidi

Sasongko

et al. 2022

Intl J of Energy Research

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“…Menipisinya ketersediaan bahan bakar fosil menyebabkan peneliti di berbagai negara berusaha menemukan energi alternatif yang dapat menggantikan atau menghemat penggunaan bahan bakar fosil tersebut, misalnya dengan penggunaan bahan bakar Hidogen [4], pemanfaatan energi air [5], maupun penggunaan bahan bakar bakar dari sampah yang diproses secara pirolisis [6]. Meskipun telah dilakukan banyak usaha untuk mencari bahan bakar alternatif, tapi peningkatan karakteristik pembakaran tetap perlu dilakukan.…”

Section: Pendahuluanunclassified

Perbandingan Interaksi Karbon Aktif dengan Polaritas Minyak Nabati terhadap Karakteristik Pembakaran Premixed

Purnami

Wardana

2021

JRM

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Crude oil consumption has increased since the discovery of crude oil-fueled engine technology. However, the increase in crude oil consumption is not offset by the productivity of the product. This results in a reduced availability of crude oil. One solution found was to use alternative fuels from vegetable oils. Several researches have proven that vegetable oils can be used as fuel. The results of the research found potential in jatropha oil and palm oil. However, jatropha oil and palm oil contain glycerol compounds which can affect the results of its combustion, because glycerol can absorb heat and result in firing more difficult. Based on that, modification and development are needed to support the use of jatropha oil and palm oil as alternative fuels by studying oil polarity and adding catalysts for coconut shell-activated carbon. Jatropha oil has low polarity (C18) which is more volatile than palm oil which has high polarity (C13). The variation used in this research is the addition of activated carbon with a concentration of 0 ppm, 200 ppm, and 400 ppm in each oil. The addition of activated carbon will facilitate evaporation because oil molecules become more reactive more freely.

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“…[1][2][3][4][5] There are various hydrogen production technologies including catalytic reforming, water electrolysis, water photolysis, biomass, metals, metal hydride, and so on, with all of them having their advantages and disadvantages. [6][7][8][9][10][11][12][13][14][15] For example, production of hydrogen from the fossil fuels though has high production efficiency, cannot be used as a long-term strategy for hydrogen economy due to its un-sustainability and airpollution; consumption of large quantity of electricity has made water electrolysis unfavorable though it can yield high-purity hydrogen; hydrogen production from the biomass, though is difficult to control with very low efficiency [16][17][18] but it is a promising method for the future. Ability to solve the problem of hydrogen storage and transportation has led to increasing attention being paid to the in-situ hydrogen generation via the reaction of metals (Al, Mg, Li, etc.)…”

Section: Introductionmentioning

confidence: 99%

Investigation on the Al/low‐melting‐point metals/salt composites for hydrogen generation

et al. 2021

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A series of Al-Ga-In-Sn-NaCl composites were prepared by mechanical ball milling. NaCl contributes to the particle breakage and particle refinement during the ball milling process, but the hydrogen generation of the composites decreases as the content of NaCl exceeds 5%. Higher composite to water ratio led to reduction of the hydrogen generation for the Al-Ga-In-Sn-5% NaCl composite. In addition, compared to pure water, the hydrogen generation of this composite is lower in NaCl solution. These results indicate the higher ionic concentration in water is not conducive for hydrogen generation. During the hydrolysis process, the dissolution of NaCl in water increases the ionic concentration, so the excessive NaCl in the composite leads to the reduction of hydrogen generation. In addition, optimization of the milling time is important for hydrogen generation. By optimizing the milling time to 18 hours, hydrogen yield of the Al-Ga-In-Sn-5% NaCl composite reached 1150 mL g −1 at 25 C. Although the composites easily react with moisture in the air, the hydrogen yield of Al-Ga-In-Sn-5% NaCl and Al-Ga-In-Sn-10% NaCl composites can maintain 100% and 94% of the original after being exposed to the air for 5 and 10 days. Highlights 1. A series of Al-Ga-In-Sn-NaCl composites were prepared by mechanical ball milling. 2. NaCl contributes to the particle breakage and particle refinement during the ball milling process, but the hydrogen generation of the composites decreases as the content of NaCl exceeds 5%.3. By optimizing the milling time to 18 hours, hydrogen yield of the Al-Ga-In-Sn-5% NaCl composite reached 1150 mL g −1 at 25 C in pure water. 4. The hydrogen yield of Al-Ga-In-Sn-5% NaCl and Al-Ga-In-Sn-10% NaCl composites can maintain 100% and 94% of the original after being exposed to the air for 5 and 10 days.

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Strengthening external magnetic fields with activated carbon graphene for increasing hydrogen production in water electrolysis

Cited by 29 publications

References 39 publications

Enhancement of hydrogen production using dynamic magnetic field through water electrolysis

Enhancement of hydrogen production using dynamic magnetic field through water electrolysis

Perbandingan Interaksi Karbon Aktif dengan Polaritas Minyak Nabati terhadap Karakteristik Pembakaran Premixed

Investigation on the Al/low‐melting‐point metals/salt composites for hydrogen generation

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