Synthesis of mesoporous materials SBA-15 and CMK-3 from fly ash and their application for CO2 adsorption
Synthesis of mesoporous materials SBA-15 and CMK-3 from fly ash and their application for CO2 adsorption
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DOI：
10.1007/s10934-008-9231-x
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发表时间：
2009-10-01
影响因子：
2.6
通讯作者：
Ahn, Wha-Seung
中科院分区：
文献类型：
--
作者：
Chandrasekar, Govindasamy;Son, Won-Jin;Ahn, Wha-Seung
以某电厂粉煤灰为原料，采用碱熔法提取硅酸盐上清液，在酸性条件下制备了介孔二氧化硅SBA-15。以SBA-15为模板，以蔗糖为碳源合成了介孔碳CMK-3。通过XRD、N-2吸附-脱附、SEM、TEM等手段对所制备的介孔材料进行表征，证实其形成了有序的六方介孔结构。其结构性能与纯化学制剂接近。经聚乙烯亚胺浸渍后的SBA-15和CMK-3对二氧化碳的吸附性能进行了测试，成功地证明了将发电厂的工业废料回收利用为有用的吸附剂的可能性。
A supernatant solution of silicate species extracted from coal fly ash in a power plant by alkali fusion was used in acidic condition to prepare a mesoporous silica SBA-15. The SBA-15 was used as a template for the synthesis of a mesoporous carbon CMK-3 using sucrose as a carbon source. Characterization of the produced mesoporous materials by XRD, N-2 adsorption-desorption, SEM, and TEM confirmed the formation of well-ordered hexagonal mesostructures. Textural properties were found close to those prepared by pure chemicals. SBA-15 after polyethyleneimine impregnation and CMK-3 were tested for carbon dioxide adsorption, successfully demonstrating the possibility of recycling the industrial waste product in a power plant into a useful adsorbent.