Preparation of Calcium Carbonate Nanoparticles with a Continuous Gas-liquid Membrane Contactor: Particles Morphology and Membrane Fouling

doi:10.1016/S1004-9541(13)60449-8

Chin.J.Chem.Eng. ›› 2013, Vol. 21 ›› Issue (2): 121-126.DOI: 10.1016/S1004-9541(13)60449-8

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Preparation of Calcium Carbonate Nanoparticles with a Continuous Gas-liquid Membrane Contactor: Particles Morphology and Membrane Fouling

JIA Zhiqian, CHANG Qing, QIN Jin, MAMAT Aynur

Lab for Membrane Science and Technology, College of Chemistry, Beijing Normal University, Beijing 100875, China

Received:2011-05-12 Revised:2012-07-12 Online:2013-03-13 Published:2013-02-28

Preparation of Calcium Carbonate Nanoparticles with a Continuous Gas-liquid Membrane Contactor: Particles Morphology and Membrane Fouling

贾志谦, 常青, 秦晋, 阿伊努尔·买买提

Lab for Membrane Science and Technology, College of Chemistry, Beijing Normal University, Beijing 100875, China

通讯作者: JIA Zhiqian
基金资助:
Supported by the National Natural Science Foundation of China (20676016, 21076024).

Abstract

Abstract: Nanosized calcium carbonate particles were prepared with a continuous gas-liquid membrane contactor. The effects of Ca(OH)₂ concentration, CO₂ pressure and liquid flow velocity on the particles morphology, pressure drop and membrane fouling were studied. With rising Ca(OH)₂ concentrations, the average size of the particles increased. The effects of Ca(OH)₂ concentration and CO₂ pressure on particles were not apparent under the experimental conditions. When the Ca(OH)₂ concentration and liquid flow velocity were high, or the CO₂ pressure was low, the fouling on the membrane external surface at the contactor entrance was serious due to liquid leakage, whereas the fouling was slight at exit. The fouling on the membrane inner-surface at entrance was apparent due to adsorption of raw materials. The membrane can be recovered by washing with dilute hydrochloric acid and reused for at least 6 times without performance deterioration.

Key words: membrane contactor, gas-liquid reaction, CaCO₃ nanoparticles, two-phase reaction, membrane absorption

摘要： Nanosized calcium carbonate particles were prepared with a continuous gas-liquid membrane contactor. The effects of Ca(OH)₂ concentration, CO₂ pressure and liquid flow velocity on the particles morphology, pressure drop and membrane fouling were studied. With rising Ca(OH)₂ concentrations, the average size of the particles increased. The effects of Ca(OH)₂ concentration and CO₂ pressure on particles were not apparent under the experimental conditions. When the Ca(OH)₂ concentration and liquid flow velocity were high, or the CO₂ pressure was low, the fouling on the membrane external surface at the contactor entrance was serious due to liquid leakage, whereas the fouling was slight at exit. The fouling on the membrane inner-surface at entrance was apparent due to adsorption of raw materials. The membrane can be recovered by washing with dilute hydrochloric acid and reused for at least 6 times without performance deterioration.

关键词: membrane contactor, gas-liquid reaction, CaCO₃ nanoparticles, two-phase reaction, membrane absorption

JIA Zhiqian, CHANG Qing, QIN Jin, MAMAT Aynur. Preparation of Calcium Carbonate Nanoparticles with a Continuous Gas-liquid Membrane Contactor: Particles Morphology and Membrane Fouling[J]. Chin.J.Chem.Eng., 2013, 21(2): 121-126.

贾志谦, 常青, 秦晋, 阿伊努尔·买买提. Preparation of Calcium Carbonate Nanoparticles with a Continuous Gas-liquid Membrane Contactor: Particles Morphology and Membrane Fouling[J]. Chinese Journal of Chemical Engineering, 2013, 21(2): 121-126.

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Preparation of Calcium Carbonate Nanoparticles with a Continuous Gas-liquid Membrane Contactor: Particles Morphology and Membrane Fouling

Preparation of Calcium Carbonate Nanoparticles with a Continuous Gas-liquid Membrane Contactor: Particles Morphology and Membrane Fouling

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