CAJ | 학술논문

制备不同的 Co/MnOx (Co/MnO、Co/MnO2、Co/Mn2O3、Co/Mn3O4) 催化剂,并利用 XRD、SEM、TEM、BET、TPR、DRIFTS、XPS 表征手段分析催化剂的理化性质,比较不同氧化锰载体对催化性能的影响,考察催化剂对低碳烯烃(C=2~C=4)的选择性影响.结果表明催化剂 Co/MnO 和 Co/Mn3O4 更容易还原,并且 CO 的吸附量较大,有利于实现较高的 CO 转化率;Co/Mn2O3 和 Co/Mn3O4 中 CO 桥式吸附更高,有利于生成更多的—CH2—物种.综合考虑催化剂的活性和 C=2~C=4 选择性,Co/Mn3O4 的费托合成(FTS)性能最好,其中 C=2~C=4 选择性为50.91%,烯烷比(O/P)为 3.40.
제비불동적 Co/MnOx (Co/MnO、Co/MnO2、Co/Mn2O3、Co/Mn3O4) 최화제,병이용 XRD、SEM、TEM、BET、TPR、DRIFTS、XPS 표정수단분석최화제적이화성질,비교불동양화맹재체대최화성능적영향,고찰최화제대저탄희경(C=2~C=4)적선택성영향.결과표명최화제 Co/MnO 화 Co/Mn3O4 경용역환원,병차 CO 적흡부량교대,유리우실현교고적 CO 전화솔;Co/Mn2O3 화 Co/Mn3O4 중 CO 교식흡부경고,유리우생성경다적—CH2—물충.종합고필최화제적활성화 C=2~C=4 선택성,Co/Mn3O4 적비탁합성(FTS)성능최호,기중 C=2~C=4 선택성위50.91%,희완비(O/P)위 3.40.
A series of Co/MnOx catalysts were prepared by impregnation method to investigate the effects of MnOx supports on selectivity of light olefins (C=2—C=4). The various catalysts were characterized by XRD, SEM, TEM, TPR and DRIFTS. The TPR results showed that the Co/MnO and Co/Mn3O4 were more easy to be reduced. The DRIFTS results indicated that Co/MnO and Co/Mn3O4 had much more adsorbed CO, which improved high CO conversion. The more bridge-adsorbed CO on Co/Mn2O3 and Co/Mn3O4 catalysts would contribute to forming more CH2 species. The FTS results revealed that Co/MnO and Co/Mn3O4 had better activity, and Co/Mn2O3 and Co/Mn3O4 realized better selectivity of C=2—C=4. The Co/Mn3O4 reached the 50.91% selectivity of C=2—C=4 and olefin to paraffin ratio (O/P) of 3.40 within C2—C4.