Apatite-based materials for low concentration CO2 adsorption
Por:
Bouharras F.E., Said H.A., Boujnah M., Muñiz J., Saldaña J.M., Ben Youcef H.
Publicada:
1 ene 2025
Resumen:
This study investigated the synthesis and CO2 adsorptive properties of various iso-structural Apatite-based materials (ApX, X = (OH)2, F2, Cl2, or CO3). Different reaction conditions were assessed for the synthesis of ApX compound and the effect of the synthesis method (hydrothermal vs co-precipitation) was evaluated, in order to understand the impact of intrinsic properties of ApX on gas adsorption. The analysis of the results revealed that each analog displayed different CO2 adsorption characteristics influenced by the nature of the substituent. At 25 °C and low pressure (~2 mbar), ApF exhibited superior CO2 affinity as compared to ApOH, ApCl and ApCO3, achieving an adsorption capacity of 0.22 mmol/g. As the pressure increased, ApCl demonstrated the highest CO2 adsorption reaching a value of 1.12 mmol/g at 1 bar, suggesting a more favorable interaction between chlorine and CO2 under these conditions. The observed adsorption phenomena were identified as physisorption, with heat of adsorption (Qst) values not exceeding 43 kJ/mol. Finally, the CO2 adsorption on the different apatite-based materials was examined by means of density functional theory (DFT) calculations, which were consistent with the experimental findings, supporting the observed trends in CO2 affinity across the different apatite analogs. © 2025 Elsevier Ltd
Filiaciones:
Bouharras F.E.:
High Throughput Multidisciplinary Research Laboratory (HTMR), Mohammed VI Polytechnic University (UM6P), Ben Guerir, 43150, Morocco
Said H.A.:
High Throughput Multidisciplinary Research Laboratory (HTMR), Mohammed VI Polytechnic University (UM6P), Ben Guerir, 43150, Morocco
Boujnah M.:
CINVESTAV-Querétaro, Libramiento Norponiente 2000, Fracc. Real de Juriquilla, Querétaro, 76230, Mexico
Muñiz J.:
Instituto de Energías Renovables, Universidad Nacional Autónoma de México, Priv. Xochicalco s/n, Col. Centro, Morelos, Temixco, CP 62580, Mexico
Saldaña J.M.:
CINVESTAV-Querétaro, Libramiento Norponiente 2000, Fracc. Real de Juriquilla, Querétaro, 76230, Mexico
Ben Youcef H.:
High Throughput Multidisciplinary Research Laboratory (HTMR), Mohammed VI Polytechnic University (UM6P), Ben Guerir, 43150, Morocco
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