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li4sio4对co2捕集性能的实验研究

, PP. 636-640

Keywords: co2捕集剂,li4sio4,co2吸附量

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Abstract:

?以li2co3和sio2为原料,通过高温固相合成法合成了co2捕集剂li4sio4,并用x射线粉末衍射仪(xrd)、扫描电子显微镜(sem)对所合成的材料在co2捕集前后的晶相变化以及微观结构进行了表征。通过热重分析仪(tga)研究了li4sio4材料吸附co2的性能,并在小型热态实验台架上进行了co2热态捕集实验。实验结果表明,li4sio4对co2的捕集性能受li4sio4合成温度、co2的吸附温度以及气体中co2含量的影响,在700℃下制得的li4sio4具有最佳的co2吸附特性,最大吸附增量可达34%。li4sio4的吸附能力随着co2含量和吸附时间的增加而增加,当co2浓度分别为75%、67%、60%时,700℃li4sio4对co2最大吸附量分别可达6.68mmol/g、3.37mmol/g、2.02mmol/g(理论量8.33mmol/g)。

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