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Kinetics of α-FeO(OH)Formation in Weak Acidic Medium
Zhang Y(张懿); Wang YX(王颖霞); Hua TW(华彤文)
1991
Source PublicationJournal of Materials Science & Technology
Issue01Pages:15-20
Other Abstract<正> The kinetics of α-FeO(OH) formation in weakacidic medium was studied.The effects of the initialconcentration,temperature,pH value,partial pres-sure of oxygen,air flow rate and agitating intensityon the oxidation rate of Fe(OH)_2 suspensions havebeen investigated.It is confirmed that the reactionorder for Fe(Ⅱ) is zero at the stage of α-FeO(OH)seeds formation,and about 0.5 at the stage of theseeds growth,and in the whole process partial pres-sure of oxygen appears in first order.The activationenergy is determined.The dissolution-oxidationequilibrium which exists in the process of seedsformation has been suggested,by which the zeroorder reaction for Fe(Ⅱ) and the plateau in thepH-t curve were explained.Physical process is therate-determining step of the heterogeneousreaction.The study on the kinetics of α-FeO(OH)formation may provide some fundamental informa-tion for the reactor design,the engineering amplifi-cation and the optimization control in the industrialprocess.
KeywordKinetics Α-feo(Oh) Heterogeneous Reaction Growth Of Crystalline
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/6988
Collection研究所(批量导入)
Recommended Citation
GB/T 7714
Zhang Y,Wang YX,Hua TW. Kinetics of α-FeO(OH)Formation in Weak Acidic Medium[J]. Journal of Materials Science & Technology,1991(01):15-20.
APA Zhang Y,Wang YX,&Hua TW.(1991).Kinetics of α-FeO(OH)Formation in Weak Acidic Medium.Journal of Materials Science & Technology(01),15-20.
MLA Zhang Y,et al."Kinetics of α-FeO(OH)Formation in Weak Acidic Medium".Journal of Materials Science & Technology .01(1991):15-20.
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