Effect of NO on SO2 Oxidation Adsorption over CatalystSupport γ -Al2O3

Journal of South China University of Technology(Natural Science Edition) ›› 2004, Vol. 32 ›› Issue (11): 1-5.

Effect of NO on SO₂ Oxidation Adsorption over CatalystSupport γ -Al₂O₃

Chen Ying Li Xue- hui Xu Jian- chang Huang Yuan Wang Le- fu

College of Chemical and Energy EngineeringSouth China Univ．of Tech．Guangzhou510640GuangdongChina

Received:2004-04-30 Online:2004-11-20 Published:2015-09-08
Contact: 陈英（1967－）在职博士生副教授现在广东茂名学院任教．主要从事化学工程、环保催化等的研究。 E-mail:chen9468＠263.net
About author:陈英（1967－）在职博士生副教授现在广东茂名学院任教．主要从事化学工程、环保催化等的研究。

Abstract

Abstract: The adsorption profiles and storage capabilities of NO and SO 2 over the catalyst support γ-Al 2 O 3 were ex-plored at an adsorption temperature of423K and with different atmospheres （with oxygen or without oxygen）and the states of adsorbed SO 2 and NO were studied by DFIRFS （Diffuse Reflection Infrared Spectroscopy）．Thusthe effect of NO on SO 2 oxidation adsorption at a low temperature was observed．The results show thatat a low temperatureNO can promote the oxidation adsorption of SO 2 over γ-Al 2 O 3 and that the lattice oxygen of γ-Al 2 O 3 is directly taken part in the promotion reaction．The promotion mechanism is that there arises a surface reaction of chelating nitro com-plexes resulting from γ-Al 2 O 3 adsorbing NO with the vicinal weakly adsorbed Al—O—SO 2 and that the surface reac-tion makes the weakly adsorbed Al—O—SO 2 form stable sulfate ions （SO 42－） and oxygen vacanciesrelease NOand supply the oxygen vacancies with oxygen in gas phase to form lattice oxygenthus setting the surface reaction go-ing on and on.

Key words: Al₂O₃, sulfur dioxide, nitrogen oxide, oxidation adsorption, mechanism

CLC Number:

X842

Chen Ying, Li Xue- hui, Xu Jian- chang, et al. Effect of NO on SO₂ Oxidation Adsorption over CatalystSupport γ -Al₂O₃[J]. Journal of South China University of Technology(Natural Science Edition), 2004, 32(11): 1-5.

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Effect of NO on SO₂ Oxidation Adsorption over CatalystSupport γ -Al₂O₃

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