Thermodynamic inhibition of CO2 hydrate in the presence of morpholinium and piperidinium ionic liquids

The phase equilibrium conditions of CO2 hydrates were examined in the presence of morpholinium and piperidinium ionic liquids (ILs) with a mass fraction of 0.1. The equilibrium conditions were in the ranges of (274.6–281.2) K and (1.80–3.95) MPa. The addition of ILs shifted the hydrate equilibrium c...

Full description

Saved in:
Bibliographic Details
Published in:Fluid phase equilibria 2016-04, Vol.413, p.75-79
Main Authors: Cha, Jong-Ho, Ha, Chihyeon, Kang, Seong-Pil, Kang, Jeong Won, Kim, Ki-Sub
Format: Article
Language:English
Subjects:
Carbon dioxide
Equilibrium conditions
Flow assurance
Fluid dynamics
Fluid flow
Gas hydrate
Hydrates
Inhibition
Inhibitor
Ionic liquid
Ionic liquids
Phase equilibria
Phase equilibrium
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The phase equilibrium conditions of CO2 hydrates were examined in the presence of morpholinium and piperidinium ionic liquids (ILs) with a mass fraction of 0.1. The equilibrium conditions were in the ranges of (274.6–281.2) K and (1.80–3.95) MPa. The addition of ILs shifted the hydrate equilibrium conditions to a higher pressure and lower temperature region compared to the hydrate formed from pure water. Piperidinium and morpholinium ILs showed similar inhibition effects in the higher temperature range ≥278.5 K, whereas at lower temperature piperidinium ILs had a slightly better inhibition effect than morpholinium ILs. The anionic species also affected the hydrate inhibition effectiveness. Smaller anions, i.e., Br−, had a slightly better inhibition effect than the bigger ions of BF4−.
ISSN:0378-3812
1879-0224
DOI:10.1016/j.fluid.2015.09.008