Vaterite Synthesis via Gas-Liquid Route under Controlled pH Conditions

被引：67

作者：

Udrea, Ion ^{[1
]}

Capat, Constantin ^{[1
]}

Olaru, Elena A. ^{[1
]}

Isopescu, Raluca ^{[2
]}

Mihai, Mihaela ^{[2
]}

Mateescu, Carmencita D. ^{[3
]}

Bradu, Corina ^{[1
,4
]}

机构：

[1] Univ Bucharest, Res Ctr Environm Protect & Waste Management, Bucharest 050663, Romania

[2] Univ Politehn Bucuresti, Dept Chem Engn, Bucharest 011061, Romania

[3] Natl Inst Mat Phys, Magurele, Romania

[4] Univ Bucharest, Fac Chem, Bucharest 070346, Romania

来源：

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 2012年 / 51卷 / 24期

关键词：

CALCIUM-CARBONATE POLYMORPHS; AQUEOUS-SOLUTION; DIVALENT-CATIONS; TRANSFORMATION; MORPHOLOGY; GROWTH; CRYSTALLIZATION; PRECIPITATION; DISSOLUTION; KINETICS;

D O I：

10.1021/ie202221m

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The purpose of this work was to obtain precipitated calcium carbonate (PCC) particles in polymorphic form of vaterite via gas-liquid route in controlled pH conditions. The effect of CO2 concentration (12.5-100%), feed gas (CO2-air) flow rate, pH, and conductivity of solution upon the PCC particles properties was studied. On the basis of the experimental data, the main factors leading to vaterite formation as major product were established. It was found that the buffer solution has a decisive role in determining polymorphic phase of PCC while CO2 concentration and feed gas flow rate have no significant influence. It was demonstrated that spherical vaterite particles of high purity can be produced under controlled reaction conditions. Also, some considerations on the mechanism of carbonation process were formulated.

引用

页码：8185 / 8193

页数：9

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