CAJ | 학술논문

利用湿法混合-煅烧法将元素Ce、Zr掺杂到CO2钙基吸附剂中，利用热重分析仪（TGA）研究了24种改性钙基吸附剂吸附CO2的循环特性。研究发现：CeO2散布在CaO晶粒之间可抑制晶粒融合，对吸附剂烧结有一定的阻碍作用；CeO2可明显提高吸附剂在扩散控制阶段对CO2的吸附速率，原因在于CeO2中丰富的氧空位可促进CO2以离子迁移的方式穿过表面产物层到达内部与CaO反应；吸附剂中CeO2含量越高，稳定性越强；ZrO2与CaO高温化合成具有高塔曼温度的CaZrO3，均匀分散在CaO晶粒间，构成稳固的支撑骨架，有效抑制了吸附剂烧结。
이용습법혼합-단소법장원소Ce、Zr참잡도CO2개기흡부제중，이용열중분석의（TGA）연구료24충개성개기흡부제흡부CO2적순배특성。연구발현：CeO2산포재CaO정립지간가억제정립융합，대흡부제소결유일정적조애작용；CeO2가명현제고흡부제재확산공제계단대CO2적흡부속솔，원인재우CeO2중봉부적양공위가촉진CO2이리자천이적방식천과표면산물층도체내부여CaO반응；흡부제중CeO2함량월고，은정성월강；ZrO2여CaO고온화합성구유고탑만온도적CaZrO3，균균분산재CaO정립간，구성은고적지탱골가，유효억제료흡부제소결。
CaO-based sorbents with Ce and Zr as dopants were prepared by the method of wet mixing and subsequent calcination. The cyclic CO2 sorption/desorption performance of 24 sorbents was tested with thermogravimetric analyzer (TGA). CeO2 could increase CO2 sorption rate in the diffusion-controlled regime because the large quantity of oxygen vacancies in CeO2 could facilitate CO2 diffusion through the produced CaCO3 layer and then react with the uncreated CaO. Dispersion of CeO2 on CaO could also inhibit agglomeration of CaO crystal and its sintering at high temperature. Stability of CaO in sorption/desorption cycle increased with increasing amount of CeO2 in the sorbents. With a high Tammann temperature, the newly produced CaZrO3 from zirconia and calcium oxide could serve as a supporting framework and effectively restrain sintering.