Thermodynamics and Kinetic Modeling of the ZnSO 4 ·H 2 O Thermal Decomposition in the Presence of a Pd/Al 2 O 3 Catalyst

Gabriela V. T. Kurban, Artur S. C. Rego, Nathalli M. Mello, Eduardo A. Brocchi, Rogério C. S. Navarro and Rodrigo F. M. Souza
Additional contact information
Gabriela V. T. Kurban: 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
Artur S. C. Rego: 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
Nathalli M. Mello: 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
Eduardo A. Brocchi: 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
Rogério C. S. Navarro: 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
Rodrigo F. M. Souza: 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

Energies, 2022, vol. 15, issue 2, 1-12

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 Al 2 O 3 , 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/Al 2 O 3 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/Al 2 O 3 , an activation energy value of 204 kJ·mol −1 was calculated, which is lower than observed previously.

Keywords: zinc sulfate; thermal decomposition kinetics; Pd catalyst (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/1996-1073/15/2/548/pdf (application/pdf)
https://www.mdpi.com/1996-1073/15/2/548/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:15:y:2022:i:2:p:548-:d:723689

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().