Synthesis of Methane Hydrate from Ice Powder Accelerated by Doping Ethanol into Methane Gas

Yen An Chen, Liang Kai Chu, Che Kang Chu, Ryo Ohmura, Li Jen Chen

Research output: Contribution to journalArticle

Abstract

Clathrate hydrate is considered to be a potential medium for gas storage and transportation. Slow kinetics of hydrate formation is a hindrance to the commercialized process development of such applications. The kinetics of methane hydrate formation from the reaction of ice powder and methane gas doped with/without saturated ethanol vapor at constant pressure of 16.55 ± 0.20 MPa and constant temperature ranging from −15 to −1.0 °C were investigated. The methane hydrate formation can be dramatically accelerated by simply doping ethanol into methane gas with ultralow ethanol concentration (<94 ppm by mole fraction) in the gas phase. For ethanol-doped system 80.1% of ice powder were converted into methane hydrate after a reaction time of 4 h, while only 26.6% of ice powder was converted into methane hydrate after a reaction time of 24 h when pure methane gas was used. Furthermore, this trace amount of ethanol could also substantially suppress the self-preservation effect to enhance the dissociation rate of methane hydrate (operated at 1 atm and temperatures below the ice melting point). In other words, a trace amount of ethanol doped in methane gas can act as a kinetic promoter for both the methane hydrate formation and dissociation.

Original languageEnglish
Article number12345
JournalScientific reports
Volume9
Issue number1
DOIs
Publication statusPublished - 2019 Dec 1

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Methane
Ice
Powders
Ethanol
Gases
Temperature
Freezing
Pressure

ASJC Scopus subject areas

  • General

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Synthesis of Methane Hydrate from Ice Powder Accelerated by Doping Ethanol into Methane Gas. / Chen, Yen An; Chu, Liang Kai; Chu, Che Kang; Ohmura, Ryo; Chen, Li Jen.

In: Scientific reports, Vol. 9, No. 1, 12345, 01.12.2019.

Research output: Contribution to journalArticle

Chen, Yen An ; Chu, Liang Kai ; Chu, Che Kang ; Ohmura, Ryo ; Chen, Li Jen. / Synthesis of Methane Hydrate from Ice Powder Accelerated by Doping Ethanol into Methane Gas. In: Scientific reports. 2019 ; Vol. 9, No. 1.
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