Izvorni znanstveni članak
Sol-gel Derived MixedMetal Oxide Sorbents for High Temperature Gas Desulfurization
V. Mandić
orcid.org/0000-0002-1036-0603
; Faculty of Chemical Engineering and Technology, University of Zagreb, Maruliæev trg 19, Zagreb, Croatia
T. Očko
; bVetropack StraÞa d.d. Hum na Sutli, Croatia
G. Matijašić
; Faculty of Chemical Engineering and Technology, University of Zagreb, Maruliæev trg 19, Zagreb, Croatia
S. Kurajica
; Faculty of Chemical Engineering and Technology, University of Zagreb, Maruliæev trg 19, Zagreb, Croatia
Sažetak
High temperature gas desulfurization (HTGD) is the main process for hydrogen sulphide removal from hot gases. Currently leading regenerable desulfurization sorbents are
based on ZnO–TiO2 system. This work presents structural and textural modifications of ZnO–TiO2 based sorbents by Al2O3 addition in order to ensure high temperature
mechanical support. Sorbents with composition Zn(2-x)Al2xTi(1-x)O4 (x = 0, 0.25, 0.5, 0.75,
1) were prepared by sol-gel process followed by thermal treatment. Nanocrystalline powderswere produced at moderate sintering conditions (500 °C, 2 h). Depending on the initial ZnO:TiO2:Al2O3 molar ratio, zincite (ZnO), brookite (TiO2) as well as gahnite(ZnAl2O4) solid solution were formed. Al2O3 induced textural modifications, rising specific
surface area from 34 to 90 m2 g–1. The sorbent sulphidation performance was testedusing newly developed procedure comprising batch sulphidation process. Sorbent with
composition Zn1.75Al0.5Ti0.75O4 was
Ključne riječi
HTGD; desulfurization; sorbent; ZnO–Al2O3–TiO2
Hrčak ID:
99436
URI
Datum izdavanja:
29.3.2013.
Posjeta: 1.023 *