Cold Energy Storage via Hydrates Production with Pure CO2 and CO2/N2 (70/30 and 50/50 vol%) Mixtures: Quantification and Comparison between Energy Stored and Energy Spent

Author:

Gambelli Alberto Maria1ORCID,Rossi Federico2ORCID,Gigliotti Giovanni1ORCID

Affiliation:

1. Civil and Environmental Engineering Department, University of Perugia, Via G. Duranti 93, 06125 Perugia, Italy

2. Engineering Department, University of Perugia, Via G. Duranti 93, 06125 Perugia, Italy

Abstract

Gas hydrates represent an attractive opportunity for gas storage. These ice-like structures can be produced both for the final disposal of greenhouse gases such as carbon dioxide in the solid form and for the storage of energy gases, such as methane, propane, and others, with the possibility of reaching energy densities comparable with those of pressurised vessels, but at lower pressures. In addition, gas hydrates can be directly produced for their capability to act as phase change materials at temperatures higher than 0 °C. This research deals with cold energy storage via the production of gas hydrate into a lab-scale apparatus. Hydrates were produced with pure carbon dioxide and with CO2/N2 mixtures (70/30 and 50/50 vol%). For each mixture, the amount of energy spent for hydrates production and cold energy stored were calculated, and the results were compared among each other. The addition of nitrogen to the system allowed us to maximise the energy stored/energy spent ratio, which passed from 78.06% to 109.04%; however, due to its molecular size and the consequent impossibility to stabilise the occupied water cages, nitrogen caused a reduction in the total quantity of hydrates produced, which was obviously proportional to the energy stored. Therefore, the concentration of nitrogen in the mixtures need to be carefully determined in order to optimise the Estored/Espent ratio.

Funder

PNRR project entitled: “High Efficiency Hydrogen Storage (HEHS)”

Publisher

MDPI AG

Reference57 articles.

1. Sloan, E.D., and Koh, C.A. (2008). CRC Press. [3rd ed.].

2. Influence of different proportion of CO2/N2 binary gas mixture on methane recovery through replacement processes in natural gas hydrates;Gambelli;Chem. Eng. Process.,2022

3. Research progress of the kinetics on natural gas hydrate replacement by CO2-containing mixed gas: A review;Zhang;J. Nat. Gas Sci. Eng.,2022

4. Methane from gas hydrates in the black sea;Demirbas;Energy Sources Part A Recovery Util. Environ. Eff.,2009

5. Experimental study on the competition between carbon dioxide hydrate and ice below the freezing point;Li;Chem. Eng. Sci.,2023

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