CO2 sequestration using red gypsum via pH-swing process: Effect of carbonation temperature and NH4HCO3 on the process efficiency

被引：24

作者：

Azdarpour, Amin ^{[1
]}

Karaei, Mohammad Afkhami ^{[1
]}

Hamidi, Hossein ^{[2
]}

Mohammadian, Erfan ^{[3
]}

Barati, Maryam ^{[4
]}

Honarvar, Bijan ^{[1
]}

机构：

[1] Islamic Azad Univ, Dept Petr Engn, Marvdasht Branch, Marvdasht, Iran

[2] Univ Aberdeen, Kings Coll, Sch Engn, Aberdeen AB24 3UE, Scotland

[3] Univ Teknol MARA, Fac Chem Engn, Shah Alam 40100, Selangor, Malaysia

[4] Islamic Azad Univ, Dept Chem Engn, Shiraz Branch, Shiraz, Iran

来源：

INTERNATIONAL JOURNAL OF MINERAL PROCESSING | 2017年 / 169卷

关键词：

CO2; sequestration; Carbon capture and storage; Mineral carbonation; Calcium carbonate; pH swing; MINERAL CARBONATION; AMMONIUM BISULFATE; STEEL SLAG; OPTIMIZATION; DISSOLUTION; EXTRACTION; LIZARDITE; CHEMISTRY; PRESSURE; RESIDUE;

D O I：

10.1016/j.minpro.2017.09.014

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The main purpose of this study is to investigate the effect of reaction temperature and NH4HCO3 on the overall performance of a pH swing mineral carbonation. The overall performance of the pH swing process is investigated in terms of carbonation efficiency and product purity. Initially, 2 M H2SO4 is used for red gypsum dissolution at 70 degrees C. Then in the second stage, NH4OH is added for increasing the solution pH and removing the impurities from solutions. Finally, CO32- is introduced to calcium rich solution in the form of pure CO2 and NH4HCO3. The experimental results show that using NH4HCO3 improves carbonation efficiency and product purity. Carbonation efficiency attains a maximum value at 75 degrees C and then decreases gradually with increasing temperature up to 300 degrees C, with both CO2 and NH4HCO3. In this research, CaCO3 with the maximum purity of 99.05%. is produced successfully when NH4HCO3 is used as a CO32- source. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：27 / 34

页数：8

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