首页|<![CDATA[CO <ce:inf loc="post">2</ce:inf> sequestration using red gypsum via pH-swing process: Effect of carbonation temperature and NH <ce:inf loc="post">4</ce:inf>HCO <ce:inf loc="post">3</ce:inf> on the process efficiency]]>
<![CDATA[CO <ce:inf loc="post">2</ce:inf> sequestration using red gypsum via pH-swing process: Effect of carbonation temperature and NH <ce:inf loc="post">4</ce:inf>HCO <ce:inf loc="post">3</ce:inf> on the process efficiency]]>
扫码查看
点击上方二维码区域，可以放大扫码查看
原文链接
NSTL
Elsevier
<![CDATA[<ce:abstract xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns="http://www.elsevier.com/xml/ja/dtd" id="ab0005" xml:lang="en" view="all" class="author"><ce:section-title id="st0005">Abstract</ce:section-title><ce:abstract-sec id="as0005" view="all"><ce:simple-para id="sp0055" view="all">The main purpose of this study is to investigate the effect of reaction temperature and NH<ce:inf loc="post">4</ce:inf>HCO<ce:inf loc="post">3</ce:inf>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, 2M H<ce:inf loc="post">2</ce:inf>SO<ce:inf loc="post">4</ce:inf>is used for red gypsum dissolution at 70°C. Then in the second stage, NH<ce:inf loc="post">4</ce:inf>OH is added for increasing the solution pH and removing the impurities from solutions. Finally, CO<ce:inf loc="post">3</ce:inf><ce:sup loc="post">2–</ce:sup>is introduced to calcium rich solution in the form of pure CO<ce:inf loc="post">2</ce:inf>and NH<ce:inf loc="post">4</ce:inf>HCO<ce:inf loc="post">3</ce:inf>. The experimental results show that using NH<ce:inf loc="post">4</ce:inf>HCO<ce:inf loc="post">3</ce:inf>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 CO<ce:inf loc="post">2</ce:inf>and NH<ce:inf loc="post">4</ce:inf>HCO<ce:inf loc="post">3</ce:inf>. In this research, CaCO<ce:inf loc="post">3</ce:inf>with the maximum purity of 99.05% is produced successfully when NH<ce:inf loc="post">4</ce:inf>HCO<ce:inf loc="post">3</ce:inf>is used as a CO<ce:inf loc="post">3</ce:inf><ce:sup loc="post">2–</ce:sup>source.</ce:simple-para></ce:abstract-sec></ce:abstract><ce:abstract xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns="http://www.elsevier.com/xml/ja/dtd" id="ab0010" class="author-highlights" xml:lang="en" view="all"><ce:section-title id="st0010">Highlights</ce:section-title><ce:abstract-sec id="as0010" view="all"><ce:simple-para id="sp0060" view="all"><ce:list id="l0005"><ce:list-item id="li0005"><ce:label>?</ce:label><ce:para id="p0005" view="all">Red gypsum can be used as a raw material for mineral carbonation.</ce:para></ce:list-item><ce:list-item id="li0010"><ce:label>?</ce:label><ce:para id="p0010" view="all">Carbonation efficiency of red gypsum attains maximum value at 75°C.</ce:para></ce:list-item><ce:list-item id="li0015"><ce:label>?</ce:label><ce:para id="p0015" view="all">High purity CaCO<ce:inf loc="post">3</ce:inf>(89.85–99.05%) is produced through pH swing process.</ce:para></ce:list-item><ce:list-item id="li0020"><ce:label>?</ce:label><ce:para id="p0020" view="all">Carbonation efficiency and CaCO<ce:inf loc="post">3</ce:inf>purity is higher with NH<ce:inf loc="post">4</ce:inf>HCO<ce:inf loc="post">3</ce:inf>rather than CO<ce:inf loc="post">2</ce:inf>.</ce:para></ce:list-item></ce:list></ce:simple-para></ce:abstract-sec></ce:abstract>]]>
CO2sequestrationCarbon capture and storageMineral carbonationCalcium carbonatepH swing
NSTL
Elsevier
