LAPSE:2023.16231
Published Article
LAPSE:2023.16231
Thermodynamics and Kinetic Modeling of the ZnSO4·H2O Thermal Decomposition in the Presence of a Pd/Al2O3 Catalyst
March 3, 2023
Abstract
The sulfur−iodine thermochemical water-splitting cycle is a promising route proposed for hydrogen production. The decomposition temperature remains a challenge in the process. Catalysts, such as Pd supported on Al2O3, are being considered to decrease reaction temperatures. However, little is known regarding the kinetic behavior of such systems. In this work, zinc sulfate thermal decomposition was studied through non-isothermal thermogravimetric analysis to understand the effect of a catalyst within the sulfur−iodine reaction system context. The findings of this analysis were also related to a thermodynamic assessment. It was observed that the presence of Pd/Al2O3 modified the reaction mechanism, possibly with some intermediate reactions that were suppressed or remarkably accelerated. The proposed model suggests that zinc sulfate transformation occurred in two sequential stages without the Pd-based material. Activation energy values of 238 and 368 kJ·mol−1 were calculated. In the presence of Pd/Al2O3, an activation energy value of 204 kJ·mol−1 was calculated, which is lower than observed previously.
The sulfur−iodine thermochemical water-splitting cycle is a promising route proposed for hydrogen production. The decomposition temperature remains a challenge in the process. Catalysts, such as Pd supported on Al2O3, are being considered to decrease reaction temperatures. However, little is known regarding the kinetic behavior of such systems. In this work, zinc sulfate thermal decomposition was studied through non-isothermal thermogravimetric analysis to understand the effect of a catalyst within the sulfur−iodine reaction system context. The findings of this analysis were also related to a thermodynamic assessment. It was observed that the presence of Pd/Al2O3 modified the reaction mechanism, possibly with some intermediate reactions that were suppressed or remarkably accelerated. The proposed model suggests that zinc sulfate transformation occurred in two sequential stages without the Pd-based material. Activation energy values of 238 and 368 kJ·mol−1 were calculated. In the presence of Pd/Al2O3, an activation energy value of 204 kJ·mol−1 was calculated, which is lower than observed previously.
Record ID
Keywords
Pd catalyst, thermal decomposition kinetics, zinc sulfate
Subject
Suggested Citation
Kurban GVT, Rego ASC, Mello NM, Brocchi EA, Navarro RCS, Souza RFM. Thermodynamics and Kinetic Modeling of the ZnSO4·H2O Thermal Decomposition in the Presence of a Pd/Al2O3 Catalyst. (2023). LAPSE:2023.16231
Author Affiliations
Kurban GVT: Department of Chemical & Materials Engineering (DEQM), Pontifícia Universidade Católica do Rio de Janeiro (PUC-Rio), R. Marquês de São Vicente 225, Rio de Janeiro 22541-900, RJ, Brazil [ORCID]
Rego ASC: Department of Chemical & Materials Engineering (DEQM), Pontifícia Universidade Católica do Rio de Janeiro (PUC-Rio), R. Marquês de São Vicente 225, Rio de Janeiro 22541-900, RJ, Brazil
Mello NM: Department of Chemical & Materials Engineering (DEQM), Pontifícia Universidade Católica do Rio de Janeiro (PUC-Rio), R. Marquês de São Vicente 225, Rio de Janeiro 22541-900, RJ, Brazil [ORCID]
Brocchi EA: Department of Chemical & Materials Engineering (DEQM), Pontifícia Universidade Católica do Rio de Janeiro (PUC-Rio), R. Marquês de São Vicente 225, Rio de Janeiro 22541-900, RJ, Brazil [ORCID]
Navarro RCS: Department of Chemical & Materials Engineering (DEQM), Pontifícia Universidade Católica do Rio de Janeiro (PUC-Rio), R. Marquês de São Vicente 225, Rio de Janeiro 22541-900, RJ, Brazil
Souza RFM: Department of Chemical & Materials Engineering (DEQM), Pontifícia Universidade Católica do Rio de Janeiro (PUC-Rio), R. Marquês de São Vicente 225, Rio de Janeiro 22541-900, RJ, Brazil [ORCID]
Rego ASC: Department of Chemical & Materials Engineering (DEQM), Pontifícia Universidade Católica do Rio de Janeiro (PUC-Rio), R. Marquês de São Vicente 225, Rio de Janeiro 22541-900, RJ, Brazil
Mello NM: Department of Chemical & Materials Engineering (DEQM), Pontifícia Universidade Católica do Rio de Janeiro (PUC-Rio), R. Marquês de São Vicente 225, Rio de Janeiro 22541-900, RJ, Brazil [ORCID]
Brocchi EA: Department of Chemical & Materials Engineering (DEQM), Pontifícia Universidade Católica do Rio de Janeiro (PUC-Rio), R. Marquês de São Vicente 225, Rio de Janeiro 22541-900, RJ, Brazil [ORCID]
Navarro RCS: Department of Chemical & Materials Engineering (DEQM), Pontifícia Universidade Católica do Rio de Janeiro (PUC-Rio), R. Marquês de São Vicente 225, Rio de Janeiro 22541-900, RJ, Brazil
Souza RFM: Department of Chemical & Materials Engineering (DEQM), Pontifícia Universidade Católica do Rio de Janeiro (PUC-Rio), R. Marquês de São Vicente 225, Rio de Janeiro 22541-900, RJ, Brazil [ORCID]
Journal Name
Energies
Volume
15
Issue
2
First Page
548
Year
2022
Publication Date
2022-01-13
ISSN
1996-1073
Version Comments
Original Submission
Other Meta
PII: en15020548, Publication Type: Journal Article
Record Map
Published Article
LAPSE:2023.16231
This Record
External Link
https://doi.org/10.3390/en15020548
Publisher Version
Download
Meta
Record Statistics
Record Views
315
Version History
[v1] (Original Submission)
Mar 3, 2023
Verified by curator on
Mar 3, 2023
This Version Number
v1
Citations
Most Recent
This Version
URL Here
https://psecommunity.org/LAPSE:2023.16231
Record Owner
Auto Uploader for LAPSE
Links to Related Works
(0.08 seconds)
[0.08 s]