Effect of surfactant on the methane hydrate combustion

Toshihisa Ueda, Kohei Mizuochi, Takeshi Yokomori

Research output: Contribution to conferencePaper

Abstract

Effect of surfactant, sodium dodecyl sulfate (SDS) on the methane hydrate combustion has been investigated experimentally. Water solution of 0-2300 ppm SDS and methane are used to form the methane hydrate with SDS. Methane hydrate of 30 g was placed in a petri dish with 100 mm inner diameter and 10mm depth. The upper surface is opened to the air and is flushed. The temperature at 1.5 mm below from the upper surface of the petri dish along the centerline was measured by a K-type thermocouple. The petri dish is placed in a vertical flow channel where the honeycomb is installed to stabilize the upward flow due to the natural convection by combustion. When the temperature reaches the ignition temperature, the hydrate is ignited at the center by a pilot burner. The flame motion is recorded by a high-speed video camera with 125 fps and the temperature data from the thermocouple is stored in a data logger. In the case of the methane hydrate with SDS, a large amount of soapy bubble was formed shortly after the ignition over the hydrate surface. The bubbles decrease the heat from the flame to the hydrate surface and then the flame is weakened and extinguished faster than the pure methane hydrate. The bubbles stifle to form an anomalous preservation zone and then the distinct decrease in the flame propagation speed is not observed.

Original languageEnglish
Publication statusPublished - 2019 Jan 1
Event12th Asia-Pacific Conference on Combustion, ASPACC 2019 - Fukuoka, Japan
Duration: 2019 Jul 12019 Jul 5

Conference

Conference12th Asia-Pacific Conference on Combustion, ASPACC 2019
CountryJapan
CityFukuoka
Period19/7/119/7/5

Fingerprint

Methane
Hydrates
Surface-Active Agents
hydrates
Surface active agents
methane
surfactants
Sodium dodecyl sulfate
sodium sulfates
Sodium Dodecyl Sulfate
parabolic reflectors
flames
bubbles
thermocouples
Thermocouples
Ignition
ignition temperature
Temperature
High speed cameras
flame propagation

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Energy Engineering and Power Technology
  • Fuel Technology
  • Condensed Matter Physics

Cite this

Ueda, T., Mizuochi, K., & Yokomori, T. (2019). Effect of surfactant on the methane hydrate combustion. Paper presented at 12th Asia-Pacific Conference on Combustion, ASPACC 2019, Fukuoka, Japan.

Effect of surfactant on the methane hydrate combustion. / Ueda, Toshihisa; Mizuochi, Kohei; Yokomori, Takeshi.

2019. Paper presented at 12th Asia-Pacific Conference on Combustion, ASPACC 2019, Fukuoka, Japan.

Research output: Contribution to conferencePaper

Ueda, T, Mizuochi, K & Yokomori, T 2019, 'Effect of surfactant on the methane hydrate combustion' Paper presented at 12th Asia-Pacific Conference on Combustion, ASPACC 2019, Fukuoka, Japan, 19/7/1 - 19/7/5, .
Ueda T, Mizuochi K, Yokomori T. Effect of surfactant on the methane hydrate combustion. 2019. Paper presented at 12th Asia-Pacific Conference on Combustion, ASPACC 2019, Fukuoka, Japan.
Ueda, Toshihisa ; Mizuochi, Kohei ; Yokomori, Takeshi. / Effect of surfactant on the methane hydrate combustion. Paper presented at 12th Asia-Pacific Conference on Combustion, ASPACC 2019, Fukuoka, Japan.
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N2 - Effect of surfactant, sodium dodecyl sulfate (SDS) on the methane hydrate combustion has been investigated experimentally. Water solution of 0-2300 ppm SDS and methane are used to form the methane hydrate with SDS. Methane hydrate of 30 g was placed in a petri dish with 100 mm inner diameter and 10mm depth. The upper surface is opened to the air and is flushed. The temperature at 1.5 mm below from the upper surface of the petri dish along the centerline was measured by a K-type thermocouple. The petri dish is placed in a vertical flow channel where the honeycomb is installed to stabilize the upward flow due to the natural convection by combustion. When the temperature reaches the ignition temperature, the hydrate is ignited at the center by a pilot burner. The flame motion is recorded by a high-speed video camera with 125 fps and the temperature data from the thermocouple is stored in a data logger. In the case of the methane hydrate with SDS, a large amount of soapy bubble was formed shortly after the ignition over the hydrate surface. The bubbles decrease the heat from the flame to the hydrate surface and then the flame is weakened and extinguished faster than the pure methane hydrate. The bubbles stifle to form an anomalous preservation zone and then the distinct decrease in the flame propagation speed is not observed.

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