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1Efficient MgO-doped CaO sorbent pellets for high temperature CO_(2) capture显示文摘Novel MgO-doped CaO sorbent pellets were prepared by gel-casting and wet impregnation.The effect of Na^(+) and MgO on the structure and CO_(2) adsorption performance of CaO sorbent pellets was elucidated.MgOdoped CaO sorbent pellets with the diameter range of 0.5-1.5 mm exhibited an excellent capacity for CO_(2) adsorption and adsorption rate due to the homogeneous dispersion of MgO in the sorbent pellets and its effects on the physical structure of sorbents.The results show that MgO can effectively inhibit the sintering of CaO and retain the adsorption capacity of sorbents during multiple adsorption-desorption cycles.The presence of mesopores and macropores resulted in appreciable change of volume from CaO(16.7 cm^(3)·mol^(-1))to CaCO3(36.9 cm^(3)·mol^(-1))over repeated operation cycles.Ca2Mg1 sorbent pellets exhibited favorable CO_(2) capture capacity(9.49 mmol·g^(-1)),average adsorption rate(0.32 mmol·g^(-1)·min^(-1)) and conversion rate of CaO(74.83%) after 30 cycles.Zhihong Xu Tao Jiang Hao Zhang Yujun Zhao Xinbin Ma Shengping Wang 2021Frontiers of Chemical Science and Engineering2021,15,3:2
2硅烷表面修饰增强氧化镁CO_(2)中温吸附性能显示文摘利用球磨-水热方法合成了具有高比表面积的氧化镁材料.经正辛基三乙氧基硅烷修饰后,氧化镁的比表面积增加,表面疏水性变强.特别是经0.2 mL硅烷修饰后的氧化镁比表面积高达210.1 m^(2)/g.硅烷对氧化镁表面的修饰极大地提高了材料的CO_(2)吸附性能.在200℃下,经0.1 mL硅烷修饰后氧化镁的CO_(2)吸附量达到69 mg_(CO_(2))/g,是纯氧化镁的3.1倍.赵景玉 郭小惠 2023内蒙古科技大学学报2023,42,2:0
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