Incorporation of CaO in inert solid matrix by spray drying sol mixture of precursors
Incorporation of CaO in inert solid matrix by spray drying sol mixture of precursors
复制标题
通过喷雾干燥前体溶胶混合物将 CaO 掺入惰性固体基质中
DOI：
10.1039/c6ra10958f
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发表时间：
2016-06
期刊：
影响因子：
3.9
通讯作者：
Xu, Minghou
中科院分区：
文献类型：
--
作者：
Yang, Xinwei;Sun, Jian;Hu, Yingchao;Xu, Minghou
研究了一种可溶性前体与一种不溶性前体的溶胶混合以将CaO掺入惰性固体基质中以获得用于CO2捕集的上级CaO基吸收剂。但目前普遍采用的烘箱干燥方法是一个缓慢且高能耗的加热过程。本研究采用喷雾干燥技术，以钙和惰性载体前驱体的溶胶混合物为原料，制备了一系列CaO基吸附剂。FSEM-EDS图谱表明CaO颗粒可以均匀地分散在惰性固体载体中。制备了四种合成CaO基吸附剂，并在相同的条件下纯N2和富CO2煅烧气氛下进行了测试，还检查了相关的表面积、形貌和粒度。在纯N2煅烧气氛下，所有合成吸收剂的CO2捕集性能均远高于天然吸收剂石灰石，尤其是掺入CaO的Ca 12 Al 14 O33在第13次循环时的转化率是石灰石的2倍。然而，在富含CO2的煅烧气氛下，观察到这些吸附剂的捕获能力的更快的降解。由于CO2的存在，这种衰减也与CaO的烧结有关，这可以通过循环后CaO的较大晶粒尺寸以及吸附剂的较小比表面积来证明。尽管如此，由于惰性载体基质的存在，合成吸附剂的性能仍然优于天然石灰石。
Sol mixing of one soluble precursor with one insoluble precursor has been investigated to incorporate CaO in an inert solid matrix to obtain superior CaO-based sorbents for CO2 capture. However the generally used drying method in oven is a slow and high energy-consuming heating process. In this study, we investigated the application of spray-drying technique, which is a quick drying and energy saved method, to synthesize a series of CaO-based sorbents with sol mixture of calcium and inert support precursors. FSEM-EDS mapping has shown that CaO grains can be homogeneously dispersed in the inert solid support. Four synthetic CaO-based sorbents were prepared and tested under the same conditions of both pure N2 and CO2-rich calcination atmospheres and the associated surface area, morphology and grain size were also examined. Under the pure N2 calcination atmosphere, all the synthetic sorbents show a much higher CO2 capture performance than natural sorbent limestone, particularly CaO incorporated in Ca12Al14O33 exhibiting the conversion twice as high as that of limestone at the 13th cycle. However, under a CO2-rich calcination atmosphere, quicker degradation of the capture capacity was observed for these sorbents. The decay is also associated with severer sintering due to the presence of CO2, which could be proved by the larger grain size of CaO as well as smaller specific surface area of the sorbents after cycles. Nevertheless, the synthetic sorbents still perform better than natural limestone due to the presence of inert support matrix.
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影响因子：
5.3
作者：
Liyu Li;D. King;Z. Nie;Xiaohong Li;C. Howard
通讯作者：
Liyu Li;D. King;Z. Nie;Xiaohong Li;C. Howard
使用La2O3或Ca12Al14O33作为添加剂增强CaO基吸附剂的CO2吸附能力的循环稳定性
DOI：
10.1007/s11814-010-0469-z
发表时间：
2011-03
期刊：
Korean J of CHem Eng
影响因子：
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作者：
cong luo;ying zheng
通讯作者：
ying zheng
影响因子：
4.2
作者：
V. Derevschikov;A. I. Lysikov;A. Okunev
通讯作者：
V. Derevschikov;A. I. Lysikov;A. Okunev
DOI：
10.1016/s1750-5836(07)00115-6
发表时间：
2008-04
影响因子：
3.9
作者：
F. Zeman
通讯作者：
F. Zeman
DOI：
10.1002/jctb.5020231005
发表时间：
2007-04
期刊：
Journal of Applied Chemistry and Biotechnology
影响因子：
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作者：
R. Barker
通讯作者：
R. Barker