The carbonation characteristics of K2CO3/Al2O3 supported sorbent for CO2 capture was investigated with thermogravimetric apparatus(TGA),X-ray diffraction(XRD),scanning electron microscopy analysis(SEM)and N2 adsorptio...The carbonation characteristics of K2CO3/Al2O3 supported sorbent for CO2 capture was investigated with thermogravimetric apparatus(TGA),X-ray diffraction(XRD),scanning electron microscopy analysis(SEM)and N2 adsorption.The results showed that the carbonation rate of K2CO3 before being loaded on Al2O3 was slow.However,the K2CO3/Al2O3supported sorbent showed excellent carbonation performance.The difference in carbonation behavior between K2CO3and K2CO3/Al2O3supported sorbent was analyzed from the microscopic view.The analytical reagent K2CO3 sample was of monoclinic crystal structure and could react quickly with H2O in the experimental carbonation environment to produce K2CO3·1.5H2O,which was unfavorable to carbonation reaction.When K2CO3was loaded on Al2O3,the surface area and porosity of the sorbent was improved greatly.So the carbonation properties of the K2CO3/Al2O3 supported sorbent was also improved.展开更多
研究了 Ga_2O_3/Al_2O_3 膜反应自组装制备 GaN 薄膜。首先利用磁控溅射法在硅衬底上制备 Ga_2O_3/Al2O3膜,再将Ga_2O_3/Al_2O_3 膜在高纯氨气气氛中氨化反应得到了 GaN 薄膜。用 X 射线衍射(XRD),X 光光电子能谱(XPS)、扫描电镜(SEM)...研究了 Ga_2O_3/Al_2O_3 膜反应自组装制备 GaN 薄膜。首先利用磁控溅射法在硅衬底上制备 Ga_2O_3/Al2O3膜,再将Ga_2O_3/Al_2O_3 膜在高纯氨气气氛中氨化反应得到了 GaN 薄膜。用 X 射线衍射(XRD),X 光光电子能谱(XPS)、扫描电镜(SEM)、透射电镜(TEM)和 荧光光谱(PL)对样品进行结构、组分、形貌和发光特性的分析。测试结果表明:用此方法得到了六方纤锌矿结构的 GaN 晶体膜。展开更多
文摘The carbonation characteristics of K2CO3/Al2O3 supported sorbent for CO2 capture was investigated with thermogravimetric apparatus(TGA),X-ray diffraction(XRD),scanning electron microscopy analysis(SEM)and N2 adsorption.The results showed that the carbonation rate of K2CO3 before being loaded on Al2O3 was slow.However,the K2CO3/Al2O3supported sorbent showed excellent carbonation performance.The difference in carbonation behavior between K2CO3and K2CO3/Al2O3supported sorbent was analyzed from the microscopic view.The analytical reagent K2CO3 sample was of monoclinic crystal structure and could react quickly with H2O in the experimental carbonation environment to produce K2CO3·1.5H2O,which was unfavorable to carbonation reaction.When K2CO3was loaded on Al2O3,the surface area and porosity of the sorbent was improved greatly.So the carbonation properties of the K2CO3/Al2O3 supported sorbent was also improved.
文摘研究了 Ga_2O_3/Al_2O_3 膜反应自组装制备 GaN 薄膜。首先利用磁控溅射法在硅衬底上制备 Ga_2O_3/Al2O3膜,再将Ga_2O_3/Al_2O_3 膜在高纯氨气气氛中氨化反应得到了 GaN 薄膜。用 X 射线衍射(XRD),X 光光电子能谱(XPS)、扫描电镜(SEM)、透射电镜(TEM)和 荧光光谱(PL)对样品进行结构、组分、形貌和发光特性的分析。测试结果表明:用此方法得到了六方纤锌矿结构的 GaN 晶体膜。
