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Energies 2018, 11(2), 399;

Anti-Agglomerator of Tetra-n-Butyl Ammonium Bromide Hydrate and Its Effect on Hydrate-Based CO2 Capture

1,2,4, 1,2,4,* , 1,2,4
Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China
Key Laboratory of Gas Hydrate, CAS and Guangzhou Center for Gas Hydrate Research, CAS, Guangzhou 510640, China
Nano Sciences and Technology Institute, University of Science and Technology of China, Suzhou 215123, China
Guangdong Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, China
Author to whom correspondence should be addressed.
Received: 14 December 2017 / Revised: 30 January 2018 / Accepted: 31 January 2018 / Published: 8 February 2018
(This article belongs to the Special Issue Carbon Capture and Storage)
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Tetra-n-butyl ammonium bromide (TBAB) was widely used in the research fields of cold storage and CO2 hydrate separation due to its high phase change latent heat and thermodynamic promotion for hydrate formation. Agglomeration always occurred in the process of TBAB hydrate generation, which led to the blockage in the pipeline and the separation apparatus. In this work, we screened out a kind of anti-agglomerant that can effectively solve the problem of TBAB hydrate agglomeration. The anti-agglomerant (AA) is composed of 90% cocamidopropyl dimethylamine and 10% glycerol, which can keep TBAB hydrate of 19.3–29.0 wt. % in a stable state of slurry over 72 h. The microscopic observation of the morphology of the TBAB hydrate particles showed that the addition of AA can greatly reduce the size of the TBAB hydrate particles. CO2 gas separation experiments found that the addition of AA led to great improvement on gas storage capacity, CO2 split fraction and separation factor, due to the increasing of contact area between gas phase and hydrate particles. The CO2 split fraction and separation factor with AA addition reached up to 70.3% and 42.8%, respectively. View Full-Text
Keywords: CO2 separation; TBAB; IGCC; anti-agglomerant; micromorphology; hydrate CO2 separation; TBAB; IGCC; anti-agglomerant; micromorphology; hydrate

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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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Li, R.; Li, X.-S.; Chen, Z.-Y.; Zhang, Y.; Xu, C.-G.; Xia, Z.-M. Anti-Agglomerator of Tetra-n-Butyl Ammonium Bromide Hydrate and Its Effect on Hydrate-Based CO2 Capture. Energies 2018, 11, 399.

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