Promoting and Inhibitory Effects of Hydrophilic/Hydrophobic Modified Aluminum Oxide Nanoparticles on Carbon Dioxide Hydrate Formation

Yu Liu, Xiangrui Liao, Changrui Shi, Zheng Ling and Lanlan Jiang
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Yu Liu: Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, School of Energy and Power Engineering, Dalian University of Technology, Dalian 116024, China
Xiangrui Liao: Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, School of Energy and Power Engineering, Dalian University of Technology, Dalian 116024, China
Changrui Shi: Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, School of Energy and Power Engineering, Dalian University of Technology, Dalian 116024, China
Zheng Ling: Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, School of Energy and Power Engineering, Dalian University of Technology, Dalian 116024, China
Lanlan Jiang: Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, School of Energy and Power Engineering, Dalian University of Technology, Dalian 116024, China

Energies, 2020, vol. 13, issue 20, 1-14

Abstract: Hydrate-based CO 2 capture from large emission sources is considered a promising process for greenhouse gas mitigation. The addition of nanoparticles may promote or inhibit the formation of hydrates. In this work, CO 2 hydrate formation experiments were performed in a dual-cell high-pressure reactor. Non-modified, hydrophilic modified and hydrophobic modified aluminum oxide (Al 2 O 3 ) nanoparticles at different concentrations were added to assess their promoting or inhibitory effects on CO 2 hydrate formation. The equilibrium temperature and pressure, induction time, and total gas consumption during CO 2 hydrate formation were measured. The results show that the presence of Al 2 O 3 nanoparticles exerts little effect on the phase equilibrium of CO 2 hydrates. Under the experimental conditions, the addition of all Al 2 O 3 nanoparticles imposes an inhibitory effect on the final gas consumption except for the 0.01 wt% addition of hydrophilic modified Al 2 O 3 nanoparticles. The induction time required for the nucleation of CO 2 hydrates mainly ranges from 70 to 90 min in the presence of Al 2 O 3 nanoparticles. Compared to the absence of nanoparticles, the addition of non-modified and hydrophilic modified Al 2 O 3 nanoparticle reduces the induction time. However, the hydrophobic modified Al 2 O 3 nanoparticles extend the induction time.

Keywords: CO 2 hydrates; aluminum oxide nanoparticles; hydrophilic/hydrophobic modified particles; phase equilibrium; induction time; gas consumption rate (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
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