Continuous Hydrothermal Flow Synthesis of S-Functionalised Carbon Quantum Dots for Enhanced Oil Recovery
Journal article
Baragau, I., Lu, Z., Power, P.N., Morgan, J.D, Bowen, J., Diaz, P. and Kellici, S. (2020). Continuous Hydrothermal Flow Synthesis of S-Functionalised Carbon Quantum Dots for Enhanced Oil Recovery. Chemical Engineering Journal. https://doi.org/10.1016/j.cej.2020.126631
| Authors | Baragau, I., Lu, Z., Power, P.N., Morgan, J.D, Bowen, J., Diaz, P. and Kellici, S. |
|---|---|
| Abstract | Currently, there is a paucity in the exploration and application of carbon-based nanomaterials for enhanced oil recovery. Carbon quantum dots (CQDs), 0D materials consisting of a graphitic core covered by an amorphous carbon framework, were produced from glucose and p-sulfonic acid calix[4]arene (SCX4) via Continuous Hydrothermal Flow Synthesis (CHFS), an environmentally benign synthetic approach. The S-functionalised carbon quantum dots (S-CQDs) demonstrated excellent colloidal stability in aqueous and brine solutions, low retention on sand surface, and impressive enhanced oil recovery (EOR) of 17% at very low concentrations of 0.01 wt%. The mechanisms proposed for CQDs in increasing oil sweeping efficiency involves altering the carbonate rocks wettability towards water wet, and creating temporary log-jamming, where the ultra-small particle size (1.7 ± 0.7 nm) allows S-CQDs to recover oil trapped in tight reservoirs. The synthesised S-CQDs also demonstrate photoluminescence, pH stability in the range of 3-11 and have excitation independent behaviour (300-360) with an emission peak at 433 nm. |
| Keywords | Carbon Dots, Continuous Hydrothermal Flow Synthesis, Glucose, Calixarenes, Biomass utilization, Enhanced Oil Recovery |
| Year | 2020 |
| Journal | Chemical Engineering Journal |
| Publisher | Elsevier |
| Digital Object Identifier (DOI) | https://doi.org/10.1016/j.cej.2020.126631 |
| Web address (URL) | https://www.sciencedirect.com/science/article/abs/pii/S1385894720327595 |
| Publication dates | |
| 12 Aug 2020 | |
| Publication process dates | |
| Accepted | 08 Aug 2020 |
| Deposited | 24 Aug 2020 |
| Accepted author manuscript | License File description manuscript and ESI File Access Level Controlled |
| Accepted author manuscript | License File Access Level Open |
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