Crystallization kinetics of ammonium polyvanadate
Zhan, Lianlian1,2; Zhang, Yang2; Zheng, Shili2; Zhang, Ying2; Fan, Binqiang2; Li, Ping2; Zhang, Yi2

Crystallization of ammonium polyvanadate is a key procedure for the production of vanadium pentoxide. The kinetics of nucleation of ammonium polyvanadate and the effects of impurities on the nucleation including sodium ion, potassium ion, hexavalent chromium ion, dihydrogen phosphate were studied in this research by using conductivity method. The solubility of ammonium polyvanadate was determined first, then the nucleation parameters were obtained by combining induction period with the classical primary nucleation theory. The results show the nucleation is homogeneous when with a high supersaturation degree of higher than 25. The critical nucleation radius, free energy and activation energy decrease, and the nucleation rate increases, with the increase of supersaturation degree. The existence of sodium ion, potassium ion, dihydrogen phosphate in the solution will prolong the induction period of crystallizing ammonium polyvanadate, with phosphorus showing the most significant influence. The morphology of the ammonium polyvanadate crystals will change from flake to spherical- like with the existence of phosphorus.

KeywordAmmonium Polyvanadate Nucleation Kinetics Effect Of Impurities Induction Period Morphology
WOS KeywordCrystal-nucleation ; Vanadium ; Mechanism ; Growth
Funding ProjectNational Key R&D Program of China[2018YFC1900505] ; National Natural Science Foundation of China[51674230] ; State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization ; Beijing Municipal Natural Science Foundation of China[2192056]
WOS Research AreaCrystallography ; Materials Science ; Physics
WOS SubjectCrystallography ; Materials Science, Multidisciplinary ; Physics, Applied
Funding OrganizationNational Key R&D Program of China ; National Natural Science Foundation of China ; State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization ; Beijing Municipal Natural Science Foundation of China
WOS IDWOS:000487829100005
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Document Type期刊论文
Corresponding AuthorZhang, Yang
Affiliation1.Tianjin Univ, Sch Chem Engn, Tianjin 300354, Peoples R China
2.Chinese Acad Sci, Natl Engn Lab Hydromet Cleaner Prod Technol, Key Lab Green Proc & Engn, Inst Proc Engn, Beijing 100190, Peoples R China
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GB/T 7714
Zhan, Lianlian,Zhang, Yang,Zheng, Shili,et al. Crystallization kinetics of ammonium polyvanadate[J]. JOURNAL OF CRYSTAL GROWTH,2019,526:9.
APA Zhan, Lianlian.,Zhang, Yang.,Zheng, Shili.,Zhang, Ying.,Fan, Binqiang.,...&Zhang, Yi.(2019).Crystallization kinetics of ammonium polyvanadate.JOURNAL OF CRYSTAL GROWTH,526,9.
MLA Zhan, Lianlian,et al."Crystallization kinetics of ammonium polyvanadate".JOURNAL OF CRYSTAL GROWTH 526(2019):9.
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