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- Title
Experimental characterization of CH4 and CO2 hydrates formation in presence of porous quartz and Cu gas-atomized particles: Thermodynamic analyses and evidences about the feasibility of CH4/CO2 reverse replacement.
- Authors
Gambelli, Alberto Maria; Di Schino, Andrea; Rossi, Federico
- Abstract
Methane and carbon dioxide hydrates were formed in a small-scale apparatus filled with pure quartz porous sand and Cu particles, produced via gas-atomization for applications in additive manufacturing. Three different concentrations were tested, of 4.23, 18.01 and 30.66 wt%. This additive was found to act as promoter for methane hydrates and as inhibitor for carbon dioxide hydrates. The effect increased with the concentrations and was associated to the chemical properties of particles. Results were compared validated with literature. For the first time, it was possible to add this material to the group of additives able to intervene on the process differently as a function of the guest compound involved. Results showed a thermodynamic area in which CO 2 hydrates required more severe conditions than CH 4 hydrates to form. This new configuration allowed to propose an innovative application based on the CH 4 /CO 2 reverse replacement. [Display omitted] • CH4 and CO2 hydrates were formed in presence of Cu gas-atomized particles. • As expected, Cu acted as promoter for methane hydrates. • Conversely, It inhibited carbon dioxide hydrates, thus showing a dual ability. • This property allows to propose a reverse application of replacement techniques. • This technique might lead to spontaneous CO2/CH4 exchange in hydrate reservoirs.
- Subjects
GAS hydrates; PARTICLE analysis; METHANE hydrates; METHANE; CARBON dioxide; QUARTZ; SAND
- Publication
Chemical Engineering Research & Design: Transactions of the Institution of Chemical Engineers Part A, 2022, Vol 186, p511
- ISSN
0263-8762
- Publication type
Article
- DOI
10.1016/j.cherd.2022.08.017