title: Investigation of simultaneous adsorption of SO2 and NO on γ-alumina at low temperature using DRIFTS.
abstract: The interaction mechanism between SO(2) and NO on γ-Al(2)O(3) was explored by diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) and outlet response of the concentrations of NO, NO(2) and SO(2) under exposure of Al(2)O(3) to SO(2) and/or NO in the absence or presence of oxygen at 150°C. The results showed that SO(2) promoted NO oxidation and NO transformed weakly adsorbed SO(2) into strongly adsorbed species on γ-Al(2)O(3), and the presence of O(2) facilitated this transformation. An interaction mechanism between SO(2) and NO on γ-Al(2)O(3) was thus postulated. The exposure of Al(2)O(3) to SO(2) and NO in the presence of O(2) resulted in the formation of at least two types of intermediates. One type was [SO(3)NO], which decomposed to form NO(2), and the other type was [SO(3)NO(2)], which decomposed to form SO(3). The decomposition of both intermediates probably formed O vacancies replaceable by gaseous O(2).
authors: Department of Chemical and Environmental Engineering, Guangdong University of Petrochemical Technology, Maoming 525000, Guangdong, China.
authors: Ying
authors: Y
authors: Xie
authors: Ying
authors: Y
authors: Chen
authors: Yugang
authors: Y
authors: Ma
authors: Zhenglai
authors: Z
authors: Jin
mesh_terms: D000327:Adsorption; D000537:Aluminum Oxide / Q000737:chemistry*; D003080:Cold Temperature; D009569:Nitric Oxide / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared; D013458:Sulfur Dioxide / Q000737:chemistry*
chemical_list: D013458:Sulfur Dioxide; D009569:Nitric Oxide; D000537:Aluminum Oxide