Deactivation Model Study of High Temperature H 2 S Wet-Desulfurization by Using ZnO

Arda Hatunoglu, Alessandro Dell’Era, Luca Del Zotto, Andrea Di Carlo, Erwin Ciro and Enrico Bocci
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Arda Hatunoglu: Department of Engineering Sciences, Università degli Studi Guglielmo Marconi, 00193 Rome, Italy
Alessandro Dell’Era: Department of Basic and Applied Sciences for Engineering, Sapienza University of Rome, 00161 Rome, Italy
Luca Del Zotto: CREAT, Centro di Ricerca su Energia, Ambiente e Territorio, eCampus University, 22060 Novedrate, Italy
Andrea Di Carlo: Department of Industrial and Computer Engineering and Economics, University of L’Aquila, 67100 L’Aquila, Italy
Erwin Ciro: ICMA Department, University Sapienza Rome, Via Eudossiana 18, 00184 Roma, Italy
Enrico Bocci: Department of Engineering Sciences, Università degli Studi Guglielmo Marconi, 00193 Rome, Italy

Energies, 2021, vol. 14, issue 23, 1-14

Abstract: High-temperature desulfurization techniques are fundamental for the development of reliable and efficient conversion systems of low-cost fuels and biomass that answer to the nowadays environmental and energy security issues. This is particularly true for biomass gasification coupled to SOFC systems where the sulfur content has to be minimized before being fed to the SOFC. Thus, commercially available zinc oxide has been studied and characterized as a desulfurizing agent in a fixed-bed reactor at high temperatures from 400 °C to 600 °C. The sorbent material was characterized by XRD, BET, SEM, and EDS analyses before and after adsorption. The sorbent’s sorption capacity has been evaluated at different temperatures, as well as the breakthrough curves. Moreover, the kinetic parameters as the initial sorption rate constant k 0 , the deactivation rate constant k d , and the activation energy have been calculated using the linearized deactivation model. The best performances have been obtained at 550 °C, obtaining a sorption capacity of 5.4 g per 100 g of sorbent and a breakthrough time of 2.7 h. These results can be used to extend ZnO desulfurization techniques to a higher temperature than the ones used today (i.e., 550 °C with respect to 400 °C).

Keywords: desulfurization; deactivation model; zinc oxide sorbent; energy (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: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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