Influence of steam in carbonation stage on CO2 capture by Ca-based industrial waste during calcium looping cycles

Influence of steam in carbonation stage on CO2 capture by Ca-based industrial waste during calcium looping cycles
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碳酸化阶段蒸汽对钙循环过程中钙基工业废物捕获CO2的影响

DOI:
10.1016/j.ijhydene.2016.01.029
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发表时间:
2016-02
影响因子:
7.2
通讯作者:
Wang Zeyan
Wang Zeyan
中科院分区:
工程技术2区
文献类型:
--
作者:
He Zirui;Li Yingjie;Ma Xiaotong;Zhang Wan;Chi Changyun;Wang Zeyan

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这项工作研究了双固定床反应器中煅烧/碳酸化循环期间碳酸化中蒸汽浓度对电石渣捕获 CO2 的影响。在严格的煅烧条件下,在 20 vol. 的存在下,煅烧电石渣的孔隙结构发生碳酸盐化。 % 蒸汽优于 60 体积的情况。 % 蒸汽。在碳化有水蒸汽存在的情况下,在严酷的煅烧条件(950℃,纯CO2)下碳化转化中电石渣的下降比没有水蒸汽时要小。较高的蒸汽浓度导致短碳酸化持续时间(例如 5 分钟)的电石渣的碳酸化转化率显着提高,因为较高的蒸汽浓度导致对 CO2 通过产物层扩散的加速作用更大。蒸汽对电石渣碳化性能呈现双向影响,高蒸汽浓度对碳化转化率的影响高于对孔隙结构的影响。
This work investigated the effect of steam concentration in carbonation on CO2capture by carbide slag during the calcination/carbonation cycles in a dual-fixed bed reactor. Under severe calcination conditions, the pore structure of calcined carbide slag carbonated in the presence of 20 vol. % steam is better than that in the presence of 60 vol. % steam. In the presence of steam in carbonation, the drop of carbide slag in carbonation conversion under severe calcination conditions (950 °C, pure CO2) is relatively smaller than that without steam. Higher steam concentration results in significantly higher carbonation conversion of carbide slag for short carbonation duration (e.g., 5 min), because higher steam concentration leads to greater accelerating effect on CO2diffusion through product layer. Steam exhibits a two-side effect on the carbonation performance of carbide slag, and the effect of high steam concentration on carbonation conversion is higher than that on pore structure.
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