CAJ | 학술논문

采用离子掺杂价态补偿原理,在Cu-Zn-Al甲醇合成催化剂中添加适量氧化锆助剂研制Cu-Zn-Al-Zr催化剂的特性.实验结果表明,最佳反应温度为230°C,比Cu-Zn-Al约低l0°C.采用XRD、UVDR、FTIR、TPD和TPR等谱学方法对2种催化剂进行表征显示,铜基催化剂的活性位可能是"Cu0-Cu+-O-Z一7Al2O3-ZrO2",工作态Cu-Zn-Al-Zr催化剂表面上Cu+/Cu0的比值、价态稳定性和对CO的吸附量均大于Cu-Zn-Al,这与该催化剂具有较好的低温活性和较高的热稳定性密切相关.
채용리자참잡개태보상원리,재Cu-Zn-Al갑순합성최화제중첨가괄량양화고조제연제Cu-Zn-Al-Zr최화제적특성.실험결과표명,최가반응온도위230°C,비Cu-Zn-Al약저l0°C.채용XRD、UVDR、FTIR、TPD화TPR등보학방법대2충최화제진행표정현시,동기최화제적활성위가능시"Cu0-Cu+-O-Z일7Al2O3-ZrO2",공작태Cu-Zn-Al-Zr최화제표면상Cu+/Cu0적비치、개태은정성화대CO적흡부량균대우Cu-Zn-Al,저여해최화제구유교호적저온활성화교고적열은정성밀절상관.
By using the principle of ion doping and valence compensation,the catalytic properties of the catalyst Cu-Zn-A1-Zr obtained by adding someZrO2 to Cu-Zn-Al were studied. The results of the activity measurement ofthe catalyst show that the optimum reaction temperature for MeOH synthesisis 230°C, being 10°C lower than that on Cu-Zn-AI catalyst. XPS-Auger, XRD,UVDR, FTIR, TPD and TPR were used to study the two kinds of catalysts.The experiment results suggest that the active center of this copper-basedcatalyst is probably "Cu0-Cu+-O-Zn2+/Al2O3-ZrO2″. It is found that the ratioof Cu+/Cu0 on the surface of Cu-Zn-A1-Zr catalyst, the stability of valenceand the adsorption amount of CO on the catalyst are all higher than that onCu-Zn-A1 catalyst, which may be responsible for its high activity at lowtemperature and high thermostability.