Hydrogen production by radio frequency plasma stimulation in methane hydrate at atmospheric pressure

Putra, Andi Erwin Eka; Nomura, Shinfuku; Mukasa, Shinobu; Toyota, Hiromichi

doi:10.1016/j.ijhydene.2012.07.099

Cited by 41 publications

(24 citation statements)

References 23 publications

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“…The gas yield from methane hydrate decomposition by the argon plasma jet concurs with the previous results [9], [10], for which hydrogen (H 2 ), carbon monoxide (CO), carbon dioxide (CO 2 ), and methane (CH 4 ) were the main products. However, some hydrocarbon molecules such as C 2 H 2 and C 2 H 4 were not detected.…”

Section: Methane Hydrate Decomposition By Rf Argon Plasma Jetsupporting

confidence: 90%

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Application of Argon Plasma Jet for Methane Hydrate Decomposition by Radio Frequency Irradiation

Rahim

Nomura

Mukasa

et al. 2017

International Journal on Advanced Science, Engineering and Information Technology

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Abstract-In this study, decomposition of methane hydrate using argon plasma jet investigated in the pressure range of 0.1MPa to 2.0MPa. The plasma generated under the high-pressure condition, which is difficult to achieve when using radio frequency (RF) plasma in the liquid method. By using emission spectrometer analysis, the excitation temperature is found to increase as the gas pressure increases, whereas, it decreases as the argon flow rate increases. During the process of plasma irradiation, the required essential reactions for methane hydrate decomposition, such as methane hydrate dissociation (MHD), steam methane reforming (SMR), and methane cracking reaction (MCR) were not completely satisfied due to an insignificant amount of methane. The gas chromatography analysis confirmed that the methane cracking reaction (MCR) was only occurred to generate hydrogen and the C (s) , due to the absence of C 2 H 2 and C 2 H 4 as the byproducts. In comparison with the other primary reactions of methane hydrate decomposition, steam methane reforming reaction became dominant in converting methane into hydrogen. Although the hydrogen production efficiency is less than that of radio frequency plasma in liquid, the reduction of CO 2 by the thermal decomposition of Teflon from CO making it possible is considered as an advanced promising technique in the future.

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Section: Methane Hydrate Decomposition By Rf Argon Plasma Jetsupporting

confidence: 90%

“…However, under the condition of high pressure, the electric field that required to stimulate the discharge is fairly high [12]. Thus, a suitable method is required to produce hydrogen under critical conditions since methane hydrates are stable only at such conditions [9], [10].…”

Section: Introductionmentioning

confidence: 99%

Application of Argon Plasma Jet for Methane Hydrate Decomposition by Radio Frequency Irradiation

Rahim

Nomura

Mukasa

et al. 2017

International Journal on Advanced Science, Engineering and Information Technology

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“…Using Microwave In-liquid Plasma 336 carbon simultaneously without emitting CO 2 [18][19][20][21]. However, this method is only focus on hydrogen production, which is not as productive as other methods.…”

Section: A Novel Methods For Producing Hydrogen From a Hydrocarbon Liquidmentioning

confidence: 99%

A Novel Method for Producing Hydrogen from a Hydrocarbon Liquid Using Microwave In-liquid Plasma

Mochtar¹,

Nomura²,

Mukasa³

et al. 2016

JEPE

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Abstract:The in-liquid plasma method is a technology in which plasma of several thousand degrees Kelvin is generated within bubbles in a liquid. The purpose of this study is to enhance the hydrogen production rate from waste oils by using in-liquid plasma. Two types of microwave in-liquid plasma apparatus are adopted for hydrogen production. One is a conventional MW (microwave) oven, the other is a microwave generator with a waveguide to apply the in-liquid plasma steam reforming method in n-dodecane. The produced gas is 58%-90% hydrogen in these methods. The hydrogen production rate is improved by stabilization of the bubble growth. The gas production rate by plasma feeding steam in n-dodecane is 1.4 times higher than that without feeding steam.

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“…In addition, . The amount of energy which is actually used to decompose 1 mol of feedstock to produce hydrogen using radio frequency (RF) plasma was approximately 6.3% to 7.3% of 150 W the input power 17) while the actual energy used to decomposed water into hydrogen, oxygen, and hydrogen peroxide is only about 0.4% of the input power 25) . In addition, by using the in-liquid plasma process, the carbon components can be solidified simultaneously.…”

Section: Introductionmentioning

confidence: 99%

Hydrogen Production from <i>n</i>-dodecane Using Steam Reforming in-Liquid Plasma Method

Mochtar

Nomura

Mukasa

et al. 2017

J. Jpn. Inst. Energy

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The aim of this study was to investigate the effect of gas flow rate on the gas production rate from n-dodecane using steam reforming in-liquid plasma. A steam reforming of n-dodecane was carried out within the reactor vessel which was connected to a waveguide, an aluminum rectangular tubes that guides the propagation of electromagnetic waves with minimum loss of energy. The liquid medium used for plasma generation was n-dodecane (commercial reagent). The tip of a single electrode was positioned in the bottom center of the reactor vessel for plasma formation. The produced gas flowed through an aspirator and was trapped and collected in a water filled container. The gas production rate was measured and its compositions were analyzed using a gas chromatograph. The gas production rate by plasma with steam feeding was 1.4 times greater than that by plasma without steam feeding. The hydrogen content of the gas produced ranged from 73% to 82%. The maximum energy efficiency, as indicated by the ratio of the enthalpy difference of the chemical reactions to the input energy, was approximately 12%. The maximum hydrogen generation efficiency obtained from experiments was up to 59% higher than the efficiency of hydrogen production from electrolysis of alkaline solutions as reported in literatures.The energy payback ratio of hydrogen (EPR H2)was also calculated in order to obtain the hydrogen production efficiency.

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Hydrogen production by radio frequency plasma stimulation in methane hydrate at atmospheric pressure

Cited by 41 publications

References 23 publications

Application of Argon Plasma Jet for Methane Hydrate Decomposition by Radio Frequency Irradiation

Application of Argon Plasma Jet for Methane Hydrate Decomposition by Radio Frequency Irradiation

A Novel Method for Producing Hydrogen from a Hydrocarbon Liquid Using Microwave In-liquid Plasma

Hydrogen Production from <i>n</i>-dodecane Using Steam Reforming in-Liquid Plasma Method

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