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Nickel Nanoparticles for Enhancing Carbon Capture

Lookup NU author(s): Gaurav Bhaduri, Dr Mohammed Alamiry, Professor Lidija Siller

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This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).

Abstract

The hydration reaction of CO₂ is one of the rate limiting steps for CO₂ absorption in aqueous solutions and for aqueous CO₂ mineralization. The catalytic activity of nickel nanoparticles (NiNPs) during CO₂ hydration is studied at different temperatures, pH and low CO₂ partial pressures to simulate actual flue gas conditions. Results show that NiNPs can work as active catalyst for the hydration of CO₂ in applications such as CO₂ separation and CO₂ mineralization. The NiNPs display optimum activity between 20-30 °C and at pH value <8. They demonstrate catalytic activity even at low CO₂ partial pressures (12 vol%)and in 50 wt% K₂CO₃ solution, an enhancement of 77% is observed in the rate of CO₂ absorption when they are present. Commercially, CO₂-saturated K₂CO₃ solutions are usually regenerated at 150 °C. At this temperature NiNPs show no significant surface oxidation but they still exhibit catalytic activity for the hydration reaction of CO₂. CO₂ absorption and mineralization (as CaCO₃) in DI water has found to be three times higher in presence of NiNPs. Calcite (CaCO₃) particles precipitated in presence of NiNPs are spherical in morphology.

Publication metadata

Author(s): Bhaduri G, Alamiry M, Siller L

Publication type: Article

Publication status: Published

Journal: Journal of Nanomaterials

Year: 2015

Volume: 2015

Online publication date: 05/11/2015

Acceptance date: 07/10/2015

Date deposited: 20/11/2015

ISSN (print): 1687-4110

ISSN (electronic): 1687-4129

Publisher: Hindawi Publishing Corporation

URL: http://dx.doi.org/10.1155/2015/581785

DOI: 10.1155/2015/581785

Data Access Statement: http://dx.doi.org/10.17634/135315-1

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