Precipitation of calcium carbonate by carbon dioxide microbubbles

被引：55

作者：

Bang, Jun-Hwan ^{[1
,3
]}

Jang, Young Nam ^{[1
]}

Kim, Wonbaek ^{[2
]}

Song, Kyung Sun ^{[1
]}

Jeon, Chi Wan ^{[1
]}

Chae, Soo Chun ^{[1
]}

Lee, Seung-Woo ^{[1
]}

Park, So-Jin ^{[3
]}

Lee, Myung Gyu ^{[1
]}

机构：

[1] Korea Inst Geosci & Mineral Resources KIGAM, Geol Environm Div, Taejon 305350, South Korea

[2] Korea Inst Geosci & Mineral Resources KIGAM, Mineral Resource Res Div, Taejon 305350, South Korea

[3] Chungnam Natl Univ, Dept Chem Engn, Taejon 305764, South Korea

来源：

CHEMICAL ENGINEERING JOURNAL | 2011年 / 174卷 / 01期

关键词：

Microbubble; Carbon dioxide; Calcium carbonate; Carbonation route; CO2;

D O I：

10.1016/j.cej.2011.09.021

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The microbubble generator (MBG)-an apparatus in which tiny micron-sized gas bubbles are produced in the aqueous phase-has been widely used in water purification systems. In this study, the feasibility of utilizing the MBG to precipitate calcium carbonate along the carbonation route was examined. The effects of the calcium hydroxide concentration and the injection flow rate of carbon dioxide on the precipitation process were evaluated. Changes in pH, temperature of the suspension, and residual calcium ion concentration in the suspension were monitored to evaluate the proposed process. In addition, the process was compared with that based on a conventional bubble generator. This revealed a two-fold improvement in the acquisition time required for calcium carbonate precipitation as well as an increase in the conversion efficiency of carbon dioxide to carbonate minerals. The proposed process should be helpful for practical applications of a carbon sequestration method. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：413 / 420

页数：8

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