2022-Sustainable Industrial Processing Summit
SIPS2022 Volume 18 Intl. Symp on Advanced Materials, Polymers, Composite, Nanomaterials, Nanotechnologies and Manufacturing
| Editors: | F. Kongoli, F. Marquis, N. Chikhradze, T. Prikhna, M. De Campos, S. Lewis, S. Miller, S. Thomas. |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2022 |
| Pages: | 290 pages |
| ISBN: | 978-1-989820-68-1(CD) |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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VISCOSITY of MOLTEN SALTS to CAPTURE CO2
Stanislaw Pietrzyk1; Piotr Palimaka2;1AGH UNIVERSITY OF SCIENCE AND TECHNOLOGY, Kraków, Poland; 2AGH UNIVERSITY OF SCIENCE AND TECHNOLOGY, Krakow, Poland;
Type of Paper: Keynote
Id Paper: 390
Topic: 43
Abstract:
Carbon capture and storage (CCS) by method Ca-looping is based on carbonation of CaO (CO2 absorption), and calcination of the formed CaCO3 (CO2 desorption) [1].
A great challenge for this method is the decreasing sorbent reactivity after many absorption–desorption cycles [2].
Avoidance of sorbent degradation and reduction of its efficiency is possible thanks to a process known as carbon capture in molten salts (CCMS) [3]. The most promising salt mixture is eutectic CaCl2-CaF2 [4]. The CaO -CaCl2-CaF2 solutions are expected to form a suspension due to supersaturation in CaO. This can lead to an increase in viscosity, which can be a challenge in an enlarged CCMS installations where a possible approach is to transport molten salts between the absorption and desorption chambers [5]. Unfortunately, data on the viscosity of such solutions are lacking.
In order to check these possible limitations, an experimental evaluation of the viscosity of the CaCl2-CaF2-CaO systems was performed. Viscosity measurements were carried out with a high-temperature rotary rheometer. The results showed that increasing the CaO content and lowering the melt temperature increases the viscosity. Comparing the salt viscosity with the 30% addition of CaO and without its addition, the relative increase in viscosity at the temperatures of 750 and 950 0C was over six and five times more , respectively.
The obtained viscosity results in the temperature range of 750-9500C and for the additive up to 30 wt.% CaO did not exceed the value of 30 cP, which proves that the cyclic transport of salt between the reactor chambers will not be hindered.
Keywords:
Environment; New and advanced technology; Carbon capture, Molten salts, ViscosityReferences:
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[3] V. Tomkute, A. Solheim, E. Olsen, Energy Fuels 27 (2013) 5373–5379.
[4] V. Tomkute , A. Solheim, E. Olsen, Energy Fuels 28 (2014) 5345–5353
[5] E. Olsen, Patent No. US 8,540,954 B2, Sep. 24, (2013).