Carbon Dioxide Capture from Flue Gas Using Tri-Sodium Phosphate as an Effective Sorbent

Tushar Sakpal, Asheesh Kumar, Zachary M. Aman and Rajnish Kumar
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Tushar Sakpal: Catalytic Processes and Materials, Faculty of Science and Technology, MESA+ Institute for Nanotechnology, University of Twente, Drienerlolaan 5, 7522 NB Enschede, The Netherlands
Asheesh Kumar: Department of Chemical Engineering, University of Western Australia, 35 Stirling Highway, Crawley, Western Australia 6009, Australia
Zachary M. Aman: Department of Chemical Engineering, University of Western Australia, 35 Stirling Highway, Crawley, Western Australia 6009, Australia
Rajnish Kumar: Department of Chemical Engineering, Indian Institute of Technology, Madras, Chennai 600036, India

Energies, 2019, vol. 12, issue 15, 1-16

Abstract: Fossil fuels are dominant as an energy source, typically producing carbon dioxide (CO 2 ) and enhancing global climate change. The present work reports the application of low-cost tri-sodium phosphate (TSP) to capture CO 2 from model flue gas (CO 2 + N 2 ) mixture, in a batch mode and fixed-bed setup. It is observed that TSP has a high CO 2 capture capacity as well as high CO 2 selectivity. At ambient temperature, TSP shows a maximum CO 2 capture capacity of 198 mg CO 2 /g of TSP. Furthermore, the CO 2 capture efficiency of TSP over a flue gas mixture was found to be more than 90%. Fresh and spent materials were characterized using powder X-ray diffraction (PXRD), scanning electron microscopy (SEM), and Fourier transformed infrared spectroscopy (FTIR). Preliminary experiments were also conducted to evaluate the performance of regenerated TSP. The spent TSP was regenerated using sodium hydroxide (NaOH) and its recyclability was tested for three consecutive cycles. A conceptual prototype for post-combustion CO 2 capture based on TSP material has also been discussed.

Keywords: CO 2 capture; tri-sodium phosphate; inorganic sorbent; gas separation; flue gas mixture (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: 2019
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