Tianrong Cao, Weipeng Zhang, Jingcai Cheng, 等. Comparative experimental study on reactive crystallization of Ni(OH)2 in an airlift-loop reactor and a stirred reactor[J]. 中国化学工程学报(英文版), 2018,26(1):196-206. DOI: 10.1016/j.cjche.2017.03.007.
in an airlift-loop reactor and a stirred reactor[J]. Chinese Journal of Chemical Engineering, 2018, 26(1): 196-206.
Tianrong Cao, Weipeng Zhang, Jingcai Cheng, 等. Comparative experimental study on reactive crystallization of Ni(OH)2 in an airlift-loop reactor and a stirred reactor[J]. 中国化学工程学报(英文版), 2018,26(1):196-206. DOI: 10.1016/j.cjche.2017.03.007.DOI:
in an airlift-loop reactor and a stirred reactor[J]. Chinese Journal of Chemical Engineering, 2018, 26(1): 196-206.DOI: 10.1016/j.cjche.2017.03.007.
Comparative experimental study on reactive crystallization of Ni(OH)2 in an airlift-loop reactor and a stirred reactor
摘要
Abstract
The objective of this work is to study the reactive crystallization in an airlift-loop reactor (ALR) using the precipitation of Ni(OH)
2
as a model reaction. The growth of Ni(OH)
2
particles in an ALR and a stirred tank was quantified by scanning electronic microscope (SEM)
X-ray diffraction (XRD)
laser particle analyzer
tap densitometer and optical microscope
and the growth process of Ni(OH)
2
particles is analyzed. It is found that the Ni(OH)
2
particles prepared in an ALR have a better sphericity than those in a stirred tank and the growth of Ni(OH)
2
particle tap density mainly depends on the size of crystallites:the bigger the size of crystallites
the bigger the tap density is. Based on these
the growth process of Ni(OH)
2
particles in ALR is elaborated. Crystallites precipitated from solution aggregate to form large particles with much void. These constituting crystallites continue to grow up
that takes up the void inside particles and makes the tap density increase.
关键词
Keywords
references
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