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Indexed by:期刊论文

Date of Publication:2011-07-29

Journal:SEPARATION AND PURIFICATION TECHNOLOGY

Included Journals:SCIE、EI

Volume:80

Issue:2

Page Number:345-350

ISSN No.:1383-5866

Key Words:SO2 removal; NiAl mixed oxides; Adsorption

Abstract:A series of NiAl mixed oxides derived from hydrotalcite-like compounds were prepared by a urea hydrolysis method, and characterized by TGA, XRD, SEM, CO2-TPD, N-2 adsorption/desorption and XPS techniques. The SO2 adsorption capacity of the materials correlated closely with their basicity and active oxygen species on the surface, as estimated by a volumetric method. The NiAl mixed oxide with the optimal Ni/Al molar ratio of 3 showed the best performance of SO2 adsorption. Moreover, its adsorption equilibrium of a type I isotherm and pore opening in the quasi-micropore region significantly improve the adsorption performance for low-concentration SO2. (C) 2011 Elsevier B.V. All rights reserved.