Screening of Low-Dosage Methanol as a Hydrate Promoter

Jyoti Shanker Pandey (), Saad Khan and Nicolas von Solms ()
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Jyoti Shanker Pandey: Center for Energy Resource Engineering (CERE), Department of Chemical Engineering, Technical University of Denmark, 2800 Kongens Lyngby, Denmark
Saad Khan: Center for Energy Resource Engineering (CERE), Department of Chemical Engineering, Technical University of Denmark, 2800 Kongens Lyngby, Denmark
Nicolas von Solms: Center for Energy Resource Engineering (CERE), Department of Chemical Engineering, Technical University of Denmark, 2800 Kongens Lyngby, Denmark

Energies, 2022, vol. 15, issue 18, 1-20

Abstract: We report a quantitative study of the effect of low-concentration methanol (MeOH) on the formation and dissociation of hydrates based on CH 4 and CO 2 /N 2 guest molecules. The kinetic promotion and dissociation ability of MeOH is also compared with the anionic surfactant sodium dodecyl sulfate (SDS, 100 ppm, 50 ppm). The effects of concentration changes (1 wt% and 5 wt%), pressure ( p = 80–120 bar), guest molecules (CH 4 and CO 2 ), and temperature (1 °C and below 0 °C) are investigated using slow constant ramp (SCR) and isothermal (IT) temperature schemes. The results show that the kinetics are affected by the guest molecule and MeOH concentration. For CH 4 gas, 5 wt% MeOH shows better promotion, while for CO 2 /N 2 gas mixtures, 1 wt% MeOH gives better promotion. This conclusion agrees well with our previous results demonstrating optimal CH 4 recovery and CO 2 storage in the presence of 5 wt% MeOH. The promoting and inhibiting properties of MeOH could be beneficial in CH 4 production from gas hydrate using CO 2 -rich gas injection, as delayed hydrate film formation in the presence of MeOH could improve both CH 4 recovery and CO 2 storage.

Keywords: formation; dissociation; methanol; hydrate swapping; gas hydrate; CH 4 hydrate; CO 2 hydrate (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: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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