G'/> The effect of steam on CO <ce:inf loc='post'>2</ce:inf> uptake and sorbent attrition in fluidised bed calcium looping: The influence of process conditions and sorbent properties
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首页> 外文期刊>Separation and Purification Technology >The effect of steam on CO 2 uptake and sorbent attrition in fluidised bed calcium looping: The influence of process conditions and sorbent properties
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The effect of steam on CO 2 uptake and sorbent attrition in fluidised bed calcium looping: The influence of process conditions and sorbent properties

机译：蒸汽对CO 2 摄取和吸附剂在流化床钙循环中的影响：工艺条件和吸附剂性能的影响

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Graphical abstractDisplay OmittedHighlights?The effect of steam during calcium looping tests using two sorbents was investigated.?Relationships sorbent porosity/CO2capture/attrition were highlighted.?Steam during carbonation increases the sorbent activity, contrasting sintering.?Higher carbonation degrees lead to a particle structure more resistant to attrition.?The positive effect of steam was confirmed for a different and more reactive sorbent.AbstractCalcium looping was investigated with a focus on the effect of exposure to steam during calcination and/or carbonation stages. Experiments were carried out using an Italian limestone in a lab-scale fluidised bed reactor. Calcium looping cycles were performed at temperatures of 940 and 650°C and in atmospheres containing 70 and 15% CO2for calcination and carbonation stages, respectively. When present, steam accounted for 10% of the fluidising gas. CO2concentration in the flue gas was continuously monitored for the evaluation of the CO2capture capacity in each carbonation stage. The rate of fines generation by attrition during iterated carbonation and calcination stages was measured by collection of elutriated fines in filters at the exhaust. The extent of fragmentation was characterised by analysis of the particle size distribution of in-bed sorbent fragments after each calcination and carbonation stage. Porosimetric analyses on selected samples complemented the overall characterisation. Results of this investigation were compared with those obtained in a previous study on a different (more reactive) limestone sorbent with the aim of outlining a general mechanistic frame of the mutual relationships among the exposure to steam, sorbent microstructural features, CO2capture capacity and attrition. The propensity to attrition and fragmentation was specifically scrutinised, as it has been largely unexplored in the literature under operating conditions relevant to calcium looping.]]>
机译：<！[cdata [ 图形摘要 显示省略 突出显示 < CE：简单段ID =“SP0010”View =“全部”> ？ 蒸汽在使用两个吸附剂的钙循环测试期间的效果。 ？ 关系吸附孔隙度/ co <​​co 2 捕获/磨损被突出显示。 ？ 碳化过程中的蒸汽会增加吸附剂活动，对比烧结。 ？ 更高的碳酸化程度导致粒子结构更耐磨。 ？ 蒸汽的积极效果确认对于不同和更具活力的吸附剂。 抽象 钙循环是投资在煅烧和/或碳化阶段期间，侧重于接触蒸汽的影响。使用意大利石灰石在实验室鳞片流化床反应器中进行实验。在940和650℃的温度下和含有70和15％CO 2 用于煅烧和碳化阶段的温度下进行钙环循环。当存在时，蒸汽占流量化气体的10％。 CO 2 烟气中的浓度被连续监测了CO 2 捕获每个碳化阶段的能力。通过在废气中的过滤器中收集渗出碳酸化和煅烧阶段期间通过磨损过程中的损耗的罚款率。通过分析每种煅烧和碳酸化阶段之后的床上吸附剂片段的粒度分布的分离的特征在于碎裂程度。选定样品上的Porosimetric分析补充了整体表征。将该研究的结果与先前研究中获得的结果进行了比较，其目的是概述蒸汽，吸附剂微观结构特征的相互关系中的一般机制框架，吸附剂微观结构特征，CO 2 捕获容量和磨损。对磨损和碎片的倾向特别仔细审查，因为它在与钙循环相关的操作条件下在文献中大大未探索。 ] ]

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