Na2CO3/MgO/Al2O3 Solid Sorbents for Low-Temperature CO2 Capture

Na2CO3/MgO/Al2O3 Solid Sorbents for Low-Temperature CO2 Capture
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用于低温 CO2 捕集的 Na2CO3/MgO/Al2O3 固体吸附剂

DOI:
10.1021/ef502400s
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发表时间:
2015-01
期刊:
影响因子:
5.3
通讯作者:
Wu Ye
Wu Ye
中科院分区:
工程技术3区
文献类型:
--
作者:
Dong Wei;Chen Xiaoping;Yu Fan;Wu Ye

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Na_2CO_3/Al_2O_3是一种很有潜力的CO_2捕集介质。近年来,其碳酸化和再生行为已经得到了很好的研究,据了解,Na 2CO 3/Al 2 O3显示出高的CO2捕集能力。其主要缺点是CO2吸附率不理想。由于CO2的总吸收主要取决于前10 min的吸附,因此前10 min的吸收速率的增加可能非常显著和有价值。考虑将MgO添加到Na 2CO 3/Al 2 O3中用于基于Na 2CO 3/NaHCO 3的循环CO2捕获过程。扫描电子显微镜和X射线衍射分析表明,除Na 2CO 3外,MgO也参与了CO2吸收反应,生成了新的化合物Mg 6Al 2CO 3(OH)16·4 H2O。CO2的吸收量和吸附速率均明显增加,尤其是在前10 min。
Na2CO3/Al2O3 is one potential medium that could be used for CO2 capture technology. In recent years, its carbonation and regeneration behaviors have been well-studied, and it is understood that Na2CO3/Al2O3 demonstrates a high CO2 capture capacity. Its main drawback is the unsatisfactory CO2 adsorption rate. Because the total uptake of CO2 principally depends upon the adsorption in the first 10 min, the increase of the absorption rate in the first 10 min could be greatly significant and valuable. An addition of MgO to Na2CO3/Al2O3 is considered for a cyclic Na2CO3/NaHCO3-based CO2 capture process. Scanning electron microscopy and X-ray diffraction characterization of Na2CO3/MgO/Al2O3 indicate that, besides Na2CO3, MgO also participates in the CO2 absorption reaction and generates a new compound Mg6Al2CO3(OH)16·4H2O. Moreover, the uptakes of CO2 and the adsorption rates are observed to increase obviously, especially in the first 10 min.
DOI: 10.1016/j.cattod.2005.10.051
发表时间: 2006-02-15
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