改性钙基材料吸附CO_2性能研究

Study of Modified Limestone as CO_2 Capture Materials

温室气体CO2的大量排放是全球气候变暖的主要影响因素,对于CO2的捕集再利用研究已引起了学界和工业界的广泛关注。石灰石循环煅烧/碳酸化法捕集工业CO2气体已经被大量报道,但石灰石在循环捕集过程当中其表面容易被烧结而降低了其捕集性能,基于此,我们提出了利用耐高温氧化物（如MgO、Fe2O3、SiO2）微粒对石灰石颗粒表面进行修饰改性以便提高石灰石颗粒的抗烧结能力及其CO2捕集特性并利用TGA和SEM对改性实验进行了捕集性能测试和颗粒形貌表征。试验结果表明,金属氧化物微粒对石灰石改性有效果,其中添加1wt%MgO微粒时可以使石灰石捕集CO2的性能提高7%~8%,且吸收剂颗粒孔隙结构得以改善。

Many scientists have devoted themselves to CO2 capture research because of the global warming. Limestone can be used for CO2 capture in cement industry and had been widely reported. But the surface sintering of limestone during the recycling will was dramatically decrease its efficiency. So here we use some oxides such as MgO,SiO2 and Fe2O3to modify the morphology of the limestone particles thus to increase the CO2 capture capability of limestone. The efficiency can be increased 7% ~8% after adding 1wt% MgO particles. The CO2 capture capability and the morphology changes have been proved with TGA,SEM,etc.