CAJ | 학술논문

以 Mg(NO3)2和 Na2 CO3为原料，采用正加沉淀法制备镁基 CO2吸附剂，利用 XRD、SEM-EDS 和 DTG 等方法对吸附剂进行了表征，研究了 n(Na)/ n(Mg)比对吸附剂的物质组成、形貌和分解温度的影响；在此基础上，通过变温吸附脱附动态循环实验考察了不同吸附剂的 CO 2吸附性能。实验结果表明，当 n(Na)/ n(Mg)为8.15时，吸附剂颗粒粒径小、大小均匀、分解温度低，吸附容量达到9.584%(质量分数)；经过20次变温吸附脱附循环后，吸附能力仍保持初始吸附量的95.8%，表现出良好的稳定性。
이 Mg(NO3)2화 Na2 CO3위원료，채용정가침정법제비미기 CO2흡부제，이용 XRD、SEM-EDS 화 DTG 등방법대흡부제진행료표정，연구료 n(Na)/ n(Mg)비대흡부제적물질조성、형모화분해온도적영향；재차기출상，통과변온흡부탈부동태순배실험고찰료불동흡부제적 CO 2흡부성능。실험결과표명，당 n(Na)/ n(Mg)위8.15시，흡부제과립립경소、대소균균、분해온도저，흡부용량체도9.584%(질량분수)；경과20차변온흡부탈부순배후，흡부능력잉보지초시흡부량적95.8%，표현출량호적은정성。
A series of magnesium-based CO2 absorbents with different Na/Mg molar ratios were prepared by precipitation method with Mg ( NO3 ) 2 and Na2 CO3 as raw materials, and characterized by various methods ( including XRD, SEM-EDS and DTG) to study the compositions, morphology and decomposition temperature and so on. The CO2 absorption performance was evaluated by temperature swing absorption-desorption dynamiccyclic tests to check the impact of Na/Mg molar ratio. It can be seen that optimum molecular ratio of Na to Mg is 8 . 15 , and the sorbents is homogeneous with lower decomposition temperature caused by small particles of the sample, and initial CO2 adsorption capacity can reach 9. 584%. Good recycling capability can be obtained aswell. Compared with the initial absorption capacity there was only . % decrease after recycles.