A 3-In-1 Approach to Evaluate Gas Hydrate Inhibitors
| Autor: | Niaz Bahar Chowdhury, Narendra Kumar, Juan G. Beltran |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
inorganic chemicals
Control and Optimization Materials science Sodium Kinetics Clathrate hydrate Energy Engineering and Power Technology Thermodynamics chemistry.chemical_element 3-in-1 method 02 engineering and technology lcsh:Technology Crystal 020401 chemical engineering gas hydrates Phase (matter) 0204 chemical engineering Electrical and Electronic Engineering Engineering (miscellaneous) methane hydrates Temperature control lcsh:T Renewable Energy Sustainability and the Environment hydrate inhibitors 021001 nanoscience & nanotechnology 3. Good health Temperature gradient chemistry 0210 nano-technology Hydrate Energy (miscellaneous) |
| Zdroj: | Energies Volume 12 Issue 15 Energies, Vol 12, Iss 15, p 2921 (2019) |
| ISSN: | 1996-1073 |
| DOI: | 10.3390/en12152921 |
| Popis: | With a single apparatus and very short experimentation times, we have assessed phase equilibria, apparent kinetics and morphology of methane gas hydrates in the presence of thermodynamic inhibitors ethane-1,2-diol (MEG) and sodium chloride (NaCl) and kinetic hydrate inhibitor polyvinyl-pyrrolidone (PVP). Tight, local temperature control produced highly repeatable crystal morphologies in constant temperature systems and in systems subject to fixed temperature gradients. Hydrate-Liquid-Vapor (HLV) equilibrium points were obtained with minimal temperature and pressure uncertainties ( u T avg = 0 . 13 K and u p = 0 . 005 MPa). By applying a temperature gradient during hydrate formation, it was possible to study multiple subcoolings with a single experiment. Hydrate growth velocities were determined both under temperature gradients and under constant temperature growth. It was found that both NaCl and MEG act as kinetic inhibitors at the studied concentrations. Finally, insights on the mechanism of action of classical inhibitors are presented. |
| Databáze: | OpenAIRE |
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