A new kinetic model for CO2 capture on sodium zirconate (Na2ZrO3): An analysis under different flow rates

Mendoza-Nieto, J. Arturo; Martínez-Hernández, Héctor; Pfeiffer, Heriberto; Gómez-García, J. Francisco

doi:10.1016/j.jcou.2021.101862

Cited by 10 publications

(9 citation statements)

References 37 publications

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“…This model integrates different processes for the CO 2 −Na 2 ZrO 3 chemisorption system, as explained in previous work. 51 Here, the NO captured by Li 2 CuO 2 at any given time is represented by eqs 12 and 13. However, it was not possible to differentiate between NO captured on the surface and bulk steps using the thermobalance (Figure 2).…”

Section: Resultsmentioning

confidence: 99%

“…Based on the isothermal thermogravimetric results, the data were fitted to the consecutive double exponential (reactions and ) and Avrami–Erofeev (eqs and ) , models, which have been previously used for the analysis of CO 2 chemisorption on alkaline ceramics but have never been proposed for analyzing NO-alkaline ceramic reaction systems. surface wt % = C k 1 true( e − k 1 t k 2 − k 1 + e − k 2 t k 1 − k 2 true) diffusion wt % = C true[ 1 − e − k 1 t − ( k 1 k 2 − k 1 ) ( e − k 1 t − e − k 2 t ) true] …”

Section: Results and Discussionmentioning

confidence: 99%

Section: Results and Discussionmentioning

confidence: 99%

“…The consecutive double exponential model implies the presence of an alkaline nitrate/nitrite layer, growing by an internal alkali ion diffusion step. This model integrates different processes for the CO 2 –Na 2 ZrO 3 chemisorption system, as explained in previous work . Here, the NO captured by Li 2 CuO 2 at any given time is represented by eqs and .…”

Section: Results and Discussionmentioning

confidence: 99%

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Depicting the Nitric Oxide (NO) Chemical Sorption in Lithium Cuprate (Li₂CuO₂), through Thermokinetic and Spectroscopic Analyses

Martínez-Rodríguez,

Castrejón-Barrera,

Martínez-Hernández

et al. 2024

J. Phys. Chem. C

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The chemisorption of NO on lithium cuprate (Li 2 CuO 2 ) was studied through different techniques, including thermogravimetric and DRIFTS analyses. An initial dynamic thermogravimetric approach depicted similar efficiencies under the absence or presence oxygen (13.5 and 13.8 wt %). However, the NO capture temperature was shifted to higher values in the presence of oxygen. Moreover, the analysis of the outgoing gases showed the evolution of different nitrogen species, explained based on the Li 2 CuO 2 reactivity, solid decompositions, and oxygen content. Then, the isothermal results showed that NO capture was improved with oxygen. Isothermal solid products were characterized, and lithium nitrate and nitrite were identified. Furthermore, a kinetic analysis was performed using two different models, showing that the presence of oxygen significantly modifies the NO sorption process. Moreover, the melting processes of lithium nitrate and nitrite enhanced the whole sorption process in the presence of oxygen; meanwhile, the oxygen absence limits the NO chemisorption.

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Section: Resultsmentioning

confidence: 99%

Section: Results and Discussionmentioning

confidence: 99%

Section: Results and Discussionmentioning

confidence: 99%

Section: Results and Discussionmentioning

confidence: 99%

See 2 more Smart Citations

Depicting the Nitric Oxide (NO) Chemical Sorption in Lithium Cuprate (Li₂CuO₂), through Thermokinetic and Spectroscopic Analyses

Martínez-Rodríguez,

Castrejón-Barrera,

Martínez-Hernández

et al. 2024

J. Phys. Chem. C

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“…1 It shows high capture capacity and cyclic stability 2,3 across a wide temperature range. [4][5][6][7] Generally, Na2ZrO3 is produced by solid-state synthesis using Na2CO3 and ZrO2, neither of which react with CO2 individually. The resulting Na2ZrO3 captures CO2 using the molten salt effect (Figure 1 and Eq 1), which arises from the mobility of Na + within Na2ZrO3.…”

Section: Introductionmentioning

confidence: 99%

Deciphering the existence of hexagonal sodium zirconate CO2 sorbent

Chang

Cheung

Menon

et al. 2023

Preprint

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Sodium zirconate (sodium zirconium oxide; Na2ZrO3) is amongst the most investigated carbon dioxide (CO2) sorbent. Na2ZrO3 is renowned for its high capture capacity and cyclic stability. It can effectively capture CO2 at temperatures that are found in industrial processes such as the manufacture of steel or cement. Na2ZrO3 is reported to adopt monoclinic, hexagonal, and cubic structures since it was first discussed in the 1960s. Researchers relied on the differences in the relative intensities between two peaks (2θ ~ 16.2 and 38.7 °) in the powder X-ray diffraction (PXRD) pattern to determine the phase of this compound. It is also widely believed that the CO2 capture performance of Na2ZrO3 is related to the crystal structure, yet the crystal structure of hexagonal Na2ZrO3 has remained elusive. With the use of 3D electron diffraction (3D ED), X-ray photoelectron spectroscopy (XPS), and PXRD, we show that the hexagonal Na2ZrO3 does not exist. The so-called hexagonal Na2ZrO3 is Na2ZrO3 with three different types of disorder. Furthermore, the two PXRD peaks (2θ ~ 16.2 and 38.7 °) cannot be used to distinguish the different phases of Na2ZrO3, as the changes in the PXRD pattern are related to the extent of structure disorder. Finally, we also show that the CO2 capture properties of Na2ZrO3 are related to the Na+ site occupancy between different Na2ZrO3 samples, and not differences in crystal structures. The findings from our work shows that the current literature discussion on the structure of Na2ZrO3 is misleading. In order to further develop Na2ZrO3 as well as other mixed-metal oxides for applications, their structures, as well as any disorder, needs be understood using the methods shown in this study.

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The Effect of Na2ZrO3 Synthesis Method on the CO2 Sorption Kinetics at High Temperature

Zhou

Wang

Memon

et al. 2022

Carbon Capture Science & Technology

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A new kinetic model for CO2 capture on sodium zirconate (Na2ZrO3): An analysis under different flow rates

Cited by 10 publications

References 37 publications

Depicting the Nitric Oxide (NO) Chemical Sorption in Lithium Cuprate (Li₂CuO₂), through Thermokinetic and Spectroscopic Analyses

Depicting the Nitric Oxide (NO) Chemical Sorption in Lithium Cuprate (Li₂CuO₂), through Thermokinetic and Spectroscopic Analyses

Deciphering the existence of hexagonal sodium zirconate CO2 sorbent

The Effect of Na2ZrO3 Synthesis Method on the CO2 Sorption Kinetics at High Temperature

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A new kinetic model for CO2 capture on sodium zirconate (Na2ZrO3): An analysis under different flow rates

Cited by 10 publications

References 37 publications

Depicting the Nitric Oxide (NO) Chemical Sorption in Lithium Cuprate (Li2CuO2), through Thermokinetic and Spectroscopic Analyses

Depicting the Nitric Oxide (NO) Chemical Sorption in Lithium Cuprate (Li2CuO2), through Thermokinetic and Spectroscopic Analyses

Deciphering the existence of hexagonal sodium zirconate CO2 sorbent

The Effect of Na2ZrO3 Synthesis Method on the CO2 Sorption Kinetics at High Temperature

Contact Info

Product

Resources

About

Depicting the Nitric Oxide (NO) Chemical Sorption in Lithium Cuprate (Li₂CuO₂), through Thermokinetic and Spectroscopic Analyses

Depicting the Nitric Oxide (NO) Chemical Sorption in Lithium Cuprate (Li₂CuO₂), through Thermokinetic and Spectroscopic Analyses