Influence of the process conditions on the kinetic behaviour of zinc orthotitanate for syngasclean-up

TUNA, Özlem; Simsek, Esra Bilgin; Sarıoğlan, A.; Durakçetin, Y.

doi:10.1016/j.biombioe.2019.105326

Influence of the process conditions on the kinetic behaviour of zinc orthotitanate for syngasclean-up

Yazarlar (4)

Doç. Dr. Özlem TUNA Yalova Üniversitesi, Türkiye

Esra Bilgin Simsek
Yalova Üniversitesi, Türkiye

A. Sarıoğlan
Tubıtak Marmara Research Center, Türkiye

Y. Durakçetin
Tubıtak Marmara Research Center, Türkiye

Makale Türü	Özgün Makale
Makale Alt Türü	SSCI, AHCI, SCI, SCI-Exp dergilerinde yayınlanan tam makale
Dergi Adı	Biomass and Bioenergy
Dergi ISSN	0961-9534 Wos Dergi Scopus Dergi
Dergi Tarandığı Indeksler	SCI-Expanded
Dergi Grubu	Q1
Makale Dili	İngilizce
Basım Tarihi	09-2019
Cilt No	128
Sayı	1
Sayfalar	105326 /
DOI Numarası	10.1016/j.biombioe.2019.105326
Makale Linki	http://dx.doi.org/10.1016/j.biombioe.2019.105326

Özet

In this study, high-temperature removal of hydrogen sulphide was investigated in a fixed bed reactor using zinc orthotitanate as adsorbent material. The effect of external mass transfer limitation was examined, where no effect on the desulphurization process was observed within the studied flow rate range. The relationship between the product layer diffusion resistance and the reaction temperature was also revealed for the temperature range 450–750 °C. Additionaly, the influence of the reaction atmosphere (reduction, oxidation and gasification) at 750 °C on the desulphurization rate was investigated. The physicochemical changes of the adsorbent during the reaction were interrelated with its desulphurization behaviour through the characterization methods, namely XRD, SEM/EDS and TEM. The study revealed that the product layer formation created a significant resistance and slowed down the desulphurization kinetics. Increasing the temperature within the thermodynamic boundaries was a way of recovering the kinetics. In both the gasification and the H2 atmosphere, reduction of zinc titanate occurred and this caused losses in desulphurization activity. Water vapor caused poisoning of the active sites and this led to a steady loss of desulphurization activity. The study showed that desulphurization performance of Zn2TiO4 was less influenced by mass transfer limitations compared to its alternatives, which suggests that zinc titanate has great potential for industrial-scale hot desulphurization applications.

Anahtar Kelimeler

Diffusion | Hydrogen sulphide removal | Product layer | Zinc orthotitanate

Science Direct

BM Sürdürülebilir Kalkınma Amaçları

Atıf Sayıları
SCOPUS	5

Influence of the process conditions on the kinetic behaviour of zinc orthotitanate for syngasclean-up

Dergi Adı	BIOMASS & BIOENERGY
Yayıncı	Elsevier Ltd
Açık Erişim	Hayır
ISSN	0961-9534
E-ISSN	1873-2909
CiteScore	11,0
SJR	1,160
SNIP	1,380

Influence of the process conditions on the kinetic behaviour of zinc orthotitanate for syngasclean-up

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