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Energies 2018, 11(7), 1756; https://doi.org/10.3390/en11071756

Graphene Oxide: An Effective Promoter for CO2 Hydrate Formation

1
Jiangsu key laboratory of oil-gas storage and transportation technology, Changzhou 213016, China
2
Changzhou University, School of Petroleum Engineering, Changzhou 213016, China
*
Author to whom correspondence should be addressed.
Received: 29 May 2018 / Revised: 28 June 2018 / Accepted: 3 July 2018 / Published: 4 July 2018
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Abstract

The main difficulties in applying technologies based on hydrate formation are the slow hydrate formation rate, low storage capacity, severe formation conditions and environmentally devastating promoters. Nano-sized graphene oxide has special microstructure features such as its functional groups and a large specific surface area, which can lead to high heat and mass transfer efficiency, large gas dissolution, fast nucleation and formation rate. In this work, CO2 hydrate formation with and without graphene oxide nanoparticles was investigated. Herein, the promoting mechanism and effects of graphene oxide concentrations in different initial pressures ranging from 3 to 5 MPa at 279 K on CO2 hydrate formation process were studied experimentally. The experimental results showed that graphene oxide can shorten the induction time by 53–74.3% and increase the gas consumption up to 5.1–15.9% under different system pressures. Based on the results, the optimum concentration was ascertained as 50 ppm under which condition, the induction time and the reaction time were the shortest while the pressure drop and the gas consumption reached the maximum. View Full-Text
Keywords: CO2 hydrate; graphene oxide; microstructure; promoting mechanism; optimum concentration CO2 hydrate; graphene oxide; microstructure; promoting mechanism; optimum concentration
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Yan, S.; Dai, W.; Wang, S.; Rao, Y.; Zhou, S. Graphene Oxide: An Effective Promoter for CO2 Hydrate Formation. Energies 2018, 11, 1756.

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