CAJ | 학술논문

采用机械研磨燃烧法在不同研磨时间下制备了系列 Cu/ZnO/Al2O3催化剂,并评价了其在一氧化碳加氢制备甲醇反应中的活性.催化剂前驱体的焙烧过程通过热重-差热分析仪(TG-DSC)监测.采用 X 射线衍射(XRD)、扫描电镜(SEM)、N2吸附、程序升温还原(TPR)和 N2O 氧化后氢气滴定等方法对催化剂进行了表征.结果表明,催化剂的结构性质与研磨时间密切相关,催化剂的比表面积和铜原子的分散度随研磨时间延长先增大后减小,研磨2 h 制得的催化剂显示了最高的催化活性.
채용궤계연마연소법재불동연마시간하제비료계렬 Cu/ZnO/Al2O3최화제,병평개료기재일양화탄가경제비갑순반응중적활성.최화제전구체적배소과정통과열중-차열분석의(TG-DSC)감측.채용 X 사선연사(XRD)、소묘전경(SEM)、N2흡부、정서승온환원(TPR)화 N2O 양화후경기적정등방법대최화제진행료표정.결과표명,최화제적결구성질여연마시간밀절상관,최화제적비표면적화동원자적분산도수연마시간연장선증대후감소,연마2 h 제득적최화제현시료최고적최화활성.
Cu/ZnO/Al2O3 catalysts were prepared using mechanical grinding and combustion method and tested for the synthesis of methanol from CO hydrogenation. The calcination processes were monitored with TG-DSC. The catalysts were characterized by XRD, SEM, N2 adsorption, TPR and N2O oxidation and followed H2 titration. The results showed that the physicochemical properties of the as-prepared catalysts depend strongly on grinding time, and the BET surface area and the dispersion of copper species exhibit a volcano variation trend with an increase in grinding time. The catalyst obtained by grinding for 2 h exhibits the highest activity.