Comparative Study of Tetra-N-Butyl Ammonium Bromide and Cyclopentane on the Methane Hydrate Formation and Dissociation

Warintip Chanakro, Chutikan Jaikwang, Katipot Inkong, Santi Kulprathipanja and Pramoch Rangsunvigit
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Warintip Chanakro: The Petroleum and Petrochemical College, Chulalongkorn University, Bangkok 10330, Thailand
Chutikan Jaikwang: The Petroleum and Petrochemical College, Chulalongkorn University, Bangkok 10330, Thailand
Katipot Inkong: The Petroleum and Petrochemical College, Chulalongkorn University, Bangkok 10330, Thailand
Santi Kulprathipanja: Honeywell UOP, Des Plaines, IL 60017, USA
Pramoch Rangsunvigit: The Petroleum and Petrochemical College, Chulalongkorn University, Bangkok 10330, Thailand

Energies, 2020, vol. 13, issue 24, 1-16

Abstract: Two widely investigated methane hydrate promoters, tetra-n-butyl ammonium bromide (TBAB) and cyclopentane (CP), for methane hydrate formation and dissociation were comparatively investigated in the quiescent reactor at 2.5 °C and 8 MPa. The results indicated that the increase in the mass fraction TBAB decreased the induction time. However, it did not significantly affect the methane uptake. In the presence of CP, the increase in the CP concentration resulted in an increase in the induction time due to the increasing thicknesses of the CP layer in the unstirred reactor. Moreover, the methane uptake was varied proportionally with the CP concentration. The addition of TBAB resulted in a higher methane uptake than that of CP, since the presence of TBAB provided the cavities in the hydrate structure to accommodate the methane gas during the hydrate formation better than that of CP. On the contrary, the presence of CP significantly increased the induction time. Although the methane recovery remained relatively the same regardless of TBAB and CP concentrations, the recovery was higher in the presence of TBAB.

Keywords: methane; hydrate; formation; promoter; TBAB; cyclopentane (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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