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

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

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...

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Published in:International Journal of Mineral Processing
Main Author: Azdarpour A.; Karaei M.A.; Hamidi H.; Mohammadian E.; Barati M.; Honarvar B.
Format: Article
Language:English
Published: Elsevier B.V. 2017
Online Access:https://www.scopus.com/inward/record.uri?eid=2-s2.0-85031900019&doi=10.1016%2fj.minpro.2017.09.014&partnerID=40&md5=a0a5c610cf2a2acf47a520143dceb1d2
id 2-s2.0-85031900019
spelling 2-s2.0-85031900019
Azdarpour A.; Karaei M.A.; Hamidi H.; Mohammadian E.; Barati M.; Honarvar B.
CO2 sequestration using red gypsum via pH-swing process: Effect of carbonation temperature and NH4HCO3 on the process efficiency
2017
International Journal of Mineral Processing
169

10.1016/j.minpro.2017.09.014
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85031900019&doi=10.1016%2fj.minpro.2017.09.014&partnerID=40&md5=a0a5c610cf2a2acf47a520143dceb1d2
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 °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 °C and then decreases gradually with increasing temperature up to 300 °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. © 2017
Elsevier B.V.
03017516
English
Article
All Open Access; Green Open Access
author Azdarpour A.; Karaei M.A.; Hamidi H.; Mohammadian E.; Barati M.; Honarvar B.
spellingShingle Azdarpour A.; Karaei M.A.; Hamidi H.; Mohammadian E.; Barati M.; Honarvar B.
CO2 sequestration using red gypsum via pH-swing process: Effect of carbonation temperature and NH4HCO3 on the process efficiency
author_facet Azdarpour A.; Karaei M.A.; Hamidi H.; Mohammadian E.; Barati M.; Honarvar B.
author_sort Azdarpour A.; Karaei M.A.; Hamidi H.; Mohammadian E.; Barati M.; Honarvar B.
title CO2 sequestration using red gypsum via pH-swing process: Effect of carbonation temperature and NH4HCO3 on the process efficiency
title_short CO2 sequestration using red gypsum via pH-swing process: Effect of carbonation temperature and NH4HCO3 on the process efficiency
title_full CO2 sequestration using red gypsum via pH-swing process: Effect of carbonation temperature and NH4HCO3 on the process efficiency
title_fullStr CO2 sequestration using red gypsum via pH-swing process: Effect of carbonation temperature and NH4HCO3 on the process efficiency
title_full_unstemmed CO2 sequestration using red gypsum via pH-swing process: Effect of carbonation temperature and NH4HCO3 on the process efficiency
title_sort CO2 sequestration using red gypsum via pH-swing process: Effect of carbonation temperature and NH4HCO3 on the process efficiency
publishDate 2017
container_title International Journal of Mineral Processing
container_volume 169
container_issue
doi_str_mv 10.1016/j.minpro.2017.09.014
url https://www.scopus.com/inward/record.uri?eid=2-s2.0-85031900019&doi=10.1016%2fj.minpro.2017.09.014&partnerID=40&md5=a0a5c610cf2a2acf47a520143dceb1d2
description 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 °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 °C and then decreases gradually with increasing temperature up to 300 °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. © 2017
publisher Elsevier B.V.
issn 03017516
language English
format Article
accesstype All Open Access; Green Open Access
record_format scopus
collection Scopus
_version_ 1814778508740657152

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