Mass Transfer and Kinetics Study of Heterogeneous Semi-Batch Precipitation of Magnesium Carbonate

Bing Han; Haiyan Qu; Harri Niemi; Zuoliang Sha; Marjatta Louhi-Kultanen

doi:10.1002/ceat.201300855

Mass Transfer and Kinetics Study of Heterogeneous Semi-Batch Precipitation of Magnesium Carbonate

Bing Han^*, Haiyan Qu, Harri Niemi, Zuoliang Sha, Marjatta Louhi-Kultanen

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Abstrakti

Precipitation kinetics and mass transfer of magnesium carbonate (MgCO₃) hydrates from a reaction of magnesium hydroxide (Mg(OH)₂) and CO₂ were analyzed. The effect of CO₂ flow rate and mixing intensity on precipitation was investigated under ambient temperature and atmospheric pressure. Raman spectroscopy was used to determine the composition of the solids during semi-batch crystallization. The obtained spectra revealed the dissolution of Mg(OH)₂ and the formation of MgCO₃. The precipitation rate increased with higher gas flow rate. The rotation speed of the stirrer had a significant effect on the dissolution of Mg(OH)₂. In the researched system, the main driver of the precipitation kinetics was the mass transfer of CO₂. Nesquehonite (MgCO₃·3H₂O), as needle-like crystals, was precipitated as the main product. Raman spectroscopy can serve as a potential tool to monitor the carbonation precipitation process.

Alkuperäiskieli	Englanti
Sivut	1363-1368
Sivumäärä	6
Julkaisu	Chemical Engineering and Technology
Vuosikerta	37
Numero	8
DOI - pysyväislinkit	https://doi.org/10.1002/ceat.201300855
Tila	Julkaistu - 2014
OKM-julkaisutyyppi	A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä

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10.1002/ceat.201300855

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title = "Mass Transfer and Kinetics Study of Heterogeneous Semi-Batch Precipitation of Magnesium Carbonate",

abstract = "Precipitation kinetics and mass transfer of magnesium carbonate (MgCO3) hydrates from a reaction of magnesium hydroxide (Mg(OH)2) and CO2 were analyzed. The effect of CO2 flow rate and mixing intensity on precipitation was investigated under ambient temperature and atmospheric pressure. Raman spectroscopy was used to determine the composition of the solids during semi-batch crystallization. The obtained spectra revealed the dissolution of Mg(OH)2 and the formation of MgCO3. The precipitation rate increased with higher gas flow rate. The rotation speed of the stirrer had a significant effect on the dissolution of Mg(OH)2. In the researched system, the main driver of the precipitation kinetics was the mass transfer of CO2. Nesquehonite (MgCO3·3H2O), as needle-like crystals, was precipitated as the main product. Raman spectroscopy can serve as a potential tool to monitor the carbonation precipitation process.",

keywords = "Magnesium carbonate, Mass transfer, Precipitation kinetics, Raman spectroscopy",

author = "Bing Han and Haiyan Qu and Harri Niemi and Zuoliang Sha and Marjatta Louhi-Kultanen",

year = "2014",

doi = "10.1002/ceat.201300855",

language = "English",

volume = "37",

pages = "1363--1368",

journal = "Chemical Engineering and Technology",

issn = "0930-7516",

publisher = "Wiley-VCH Verlag",

number = "8",

}

TY - JOUR

T1 - Mass Transfer and Kinetics Study of Heterogeneous Semi-Batch Precipitation of Magnesium Carbonate

AU - Han, Bing

AU - Qu, Haiyan

AU - Niemi, Harri

AU - Sha, Zuoliang

AU - Louhi-Kultanen, Marjatta

PY - 2014

Y1 - 2014

N2 - Precipitation kinetics and mass transfer of magnesium carbonate (MgCO3) hydrates from a reaction of magnesium hydroxide (Mg(OH)2) and CO2 were analyzed. The effect of CO2 flow rate and mixing intensity on precipitation was investigated under ambient temperature and atmospheric pressure. Raman spectroscopy was used to determine the composition of the solids during semi-batch crystallization. The obtained spectra revealed the dissolution of Mg(OH)2 and the formation of MgCO3. The precipitation rate increased with higher gas flow rate. The rotation speed of the stirrer had a significant effect on the dissolution of Mg(OH)2. In the researched system, the main driver of the precipitation kinetics was the mass transfer of CO2. Nesquehonite (MgCO3·3H2O), as needle-like crystals, was precipitated as the main product. Raman spectroscopy can serve as a potential tool to monitor the carbonation precipitation process.

AB - Precipitation kinetics and mass transfer of magnesium carbonate (MgCO3) hydrates from a reaction of magnesium hydroxide (Mg(OH)2) and CO2 were analyzed. The effect of CO2 flow rate and mixing intensity on precipitation was investigated under ambient temperature and atmospheric pressure. Raman spectroscopy was used to determine the composition of the solids during semi-batch crystallization. The obtained spectra revealed the dissolution of Mg(OH)2 and the formation of MgCO3. The precipitation rate increased with higher gas flow rate. The rotation speed of the stirrer had a significant effect on the dissolution of Mg(OH)2. In the researched system, the main driver of the precipitation kinetics was the mass transfer of CO2. Nesquehonite (MgCO3·3H2O), as needle-like crystals, was precipitated as the main product. Raman spectroscopy can serve as a potential tool to monitor the carbonation precipitation process.

KW - Magnesium carbonate

KW - Mass transfer

KW - Precipitation kinetics

KW - Raman spectroscopy

UR - http://www.scopus.com/inward/record.url?scp=84905230087&partnerID=8YFLogxK

U2 - 10.1002/ceat.201300855

DO - 10.1002/ceat.201300855

M3 - Article

AN - SCOPUS:84905230087

SN - 0930-7516

VL - 37

SP - 1363

EP - 1368

JO - Chemical Engineering and Technology

JF - Chemical Engineering and Technology

IS - 8

ER -

Mass Transfer and Kinetics Study of Heterogeneous Semi-Batch Precipitation of Magnesium Carbonate

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