Studying the modification effect of calcium oxide sorbent by citric acid on its CO2 uptake and fluidization behavior

Document Type : Research paper

Authors

1 دانشگاه تبریز

2 Associate Professor of Chemical Engineering, University of Tabriz, Iran.

Abstract

In this study, in order to improve the adsorption capacity of CaO in the calcium looping process, the natural ores supplied from Bukan mines was modified by citric acid monohydrate using sol-gel method to prepare a porous CaO adsorbent. Primary and modified adsorbents were investigated by conventional analysis methods including XRD, FTIR and SEM. The capture rate of CO2 was measured using TGA analysis under pure CO2 atmosphere and finally the fluidity behavior of the appropriate sample was investigated in terms of CO2 adsorption capacity. Capture tests performed on CaO adsorbents showed that the difference in the CO2 capture capacity of the primary and modified adsorbents was the highest at the carbonation temperature of 500 °C and reached about 14.625%. This result was in consistent with the SEM pictures obtained from adsorbents, so that a more porous structure was observed in the case of modified adsorbent rather than of the initial one. To study the fluidization behavior and improve its performance, the modified adsorbent was selected and mixed with 5, 7.5 and 10 weight percent of hydrophobic silica nanoparticles. With increasing weight percentage of silica, the cannels created at low gas velocities gradually disappeared and expanded up to 2.02 times the initial height at gas velocity of 4.5 cm/s. Finally, using of citric acid monohydrate as a modifier of the structure of CaO adsorbent and silica nanoparticles as a factor of improving the fluidity of this adsorbent was suggested.

Keywords

References

 [1] X. Wu, Y. Yu, Z. Qin, and  Z. Zhang, (2014) “The advances of post-combustion CO2 capture with chemical solvents: review and guidelines”. Energy Procedia, 63, 1339-1346.
 
[2] M. Kanniche, R. Gros-Bonnivard, P. Jaud, J. Valle-Marcos, J.M., Amann, and Bouallou., (2010) “Pre-combustion, post-combustion and oxy-combustion in thermal power plant for CO2 capture”. Applied Thermal Engineering, 30, 53-62.
[3] J. C.M. Pires, F.G., Martins, M.C. M.,  Alvim-Ferraz, and M., Simões, (2011) “Recent developments on carbon capture and storage: an overview”. Chemical engineering research and design, 89, 1446-1460.
 
[4] E.S., Rubin, H., Mantripragada, A.,  Marks, P.,  Versteeg, and J. Kitchin, E.S.,  Rubin, (2012) “The outlook for improved carbon capture technology”. Progress in energy and combustion science, 38,  630-671.
 
[5] A., Perejón, L. M., Romeo, Y., Lara, P., A., Lisbona, Martínez, and J.M., Valverde, (2016) “The Calcium-Looping technology for CO2 capture: On the important roles of energy integration and sorbent behavior”. Applied Energy, 162, 787-807.
 
[6] G., Grasa, I.,  Martínez, M. E., Diego, and J., Abanades, (2014) “Determination of CaO carbonation kinetics under recarbonation conditions”. Energy & Fuels, 28, 4033-4042.
 
[7] M., Erans, V.,  Manovic, and E.J., Anthony, (2016) “Calcium looping sorbents for CO2 capture”. Applied Energy,. 180, 722-742.
 
[8] F.N., Ridha, V.,   Manovic, A.,  Macchi, M. A.,  Anthony, and E.J., Anthony, (2013) “Assessment of limestone treatment with organic acids for CO2 capture in Ca-looping cycles”. Fuel processing technology, 116,284-291.
 
[9] F.N., Ridha, V.,  Manovic, Y., Wu, A.,  Macchi, and E.J., Anthony, (2013) “Post-combustion CO2 capture by formic acid-modified CaO-based sorbents”. International Journal of Greenhouse Gas Control, 16, 21-28.
 
[10] R.,Sun, Y., Li, S., Wu, C., Liu, H.,  Liu, and C.,  Lu, (2013) “Enhancement of CO2 capture capacity by modifying limestone with propionic acid”. Powder technology, 233, 8-14.
 
[11] Y., Hu, W.,  Liu, J., Sun, M., Li, X., Yang, Y., Zhang, and M.,  Xu, (2016) “Structurally improved CaO-based sorbent by organic acids for high temperature CO2 capture”. Fuel, 167, 17-24.
 
[12] Y., Li, R., Sun, H.,  Liu, and C., Lu, (2011) “Cyclic CO2 capture behavior of limestone modified with pyroligneous acid (PA) during calcium looping cycles”. Industrial & engineering chemistry research, 50, 10222-10228.
 
[13] Y., Li, C., Zhao, H., Chen, Q.,  Ren, and L., Duan, (2011) “CO2 capture efficiency and energy requirement analysis of power plant using modified calcium-based sorbent looping cycle”. Energy , 36, 1590-1598
 
[14] Y., Li, C., Zhao, H.,Chen, C., Liang, L., Duan, and W., Zhou, (2009) “Modified CaO-based sorbent looping cycle for CO2 mitigation”. Fuel, 88, 697-704.
 
[15] C.,  Roßkopf, M., Haas, A., M.,  Faik, Linder, and A l., Wörner, (2014) “Improving powder bed properties for thermochemical storage by adding nanoparticles”. Energy conversion and management, 86, 93-98.
 
[16] C.,  Zhu, G.,  Liu, Q. Yu, , R., Pfeffer, R. N., Dave, and C. H., Nam, (2004) “Sound assisted fluidization of nanoparticle agglomerates”. Powder Technology, 141, 119-123.
 
[17] H. Nakamura, and S. Watano, (2008) “Fundamental particle fluidization behavior and handling of nano-particles in a rotating fluidized bed”. Powder Technology, 183, 324-332.
 
[18] M., D. Kashyap, Gidaspow, and M. Driscoll, (2008) “of electric field on the hydrodynamics of fluidized nanoparticles”. Powder Technology, 183, 441-453.
 
[19] B.,  Azimi, M., Tahmasebpoor, P.E.,  Sanchez-Jimenez, A., Perejon, and J.M., Valverde, (2019) “Multicycle CO2 capture activity and fluidizability of Al-based synthesized CaO sorbents”. Chemical Engineering Journal, 358, 679-690
 
[20] Q., Yu, R. N., Dave, C.,  Zhu, J.A., Quevedo,  and R., Preffer, (2005) “Enhanced fluidization of nanoparticles in an oscillating magnetic field”. AIChE Juornal, 51, 1971-1979.
 
[21] A.,  Nawar, M., Ali, A. H., Khoja, A., Waqas, M., Anwar, and M., (2021) “Mahmood, Enhanced CO2 capture using organic acid structure modified waste eggshell derived CaO sorbent”. Journal of Environmental Chemical Engineering,  9, 104871.
 
[22] H., Cheng, D., Gong, T., Zhao, T.,  Wang, and  s., Jiang, (2021) “Physicochemical characterization of the performance of acidified modified eggshell cyclic adsorption of CO2”. In Journal of Physics: Conference Series, 012034.
 
[23] H.R., Radfarnia, and M.C. Iliuta, (2016) “Limestone  acidification using citric acid coupled with two-step  calcination for improving the CO2 sorbentactivity”. Industrial & Engineering Chemistry Research, 52,7002-7013.
 
Journal of Separation Science and Engineering
Volume 14, Issue 1
September 2022
Pages 24-34

Files

Share

How to cite

Statistics