CAJ | 학술논문

以Al2 O3为载体,采用吸附-沉淀法制备一系列Ru-Fe/Al2 O3催化剂,并进行了H2-TPR、XRD及XPS表征。以马来酸二甲酯(DMM)催化加氢合成丁二酸二甲酯(DMS)为探针反应,考察了Fe的加入对Ru/Al2O3催化性能的影响。评价结果表明,当Fe/Ru原子比小于2时,催化剂活性变化不大；但Fe/Ru 原子比大于或等于2时,催化剂活性明显增加；与Ru /Al2 O3催化剂相比,Fe的加入改善了催化剂的高温氧化还原处理稳定性。以甲醇为溶剂,在70℃、1.0 MPa压力、600 r/min转速下,Ru-Fe/Al2 O3催化DMM的转化率与生成DMS的选择性均接近100%。 XPS和H2-TPR表征结果表明,Ru-Fe/Al2 O3中Fe与Ru产生较强的相互作用,促进Ru的分散且调变了Ru的电子特性。
이Al2 O3위재체,채용흡부-침정법제비일계렬Ru-Fe/Al2 O3최화제,병진행료H2-TPR、XRD급XPS표정。이마래산이갑지(DMM)최화가경합성정이산이갑지(DMS)위탐침반응,고찰료Fe적가입대Ru/Al2O3최화성능적영향。평개결과표명,당Fe/Ru원자비소우2시,최화제활성변화불대；단Fe/Ru 원자비대우혹등우2시,최화제활성명현증가；여Ru /Al2 O3최화제상비,Fe적가입개선료최화제적고온양화환원처리은정성。이갑순위용제,재70℃、1.0 MPa압력、600 r/min전속하,Ru-Fe/Al2 O3최화DMM적전화솔여생성DMS적선택성균접근100%。 XPS화H2-TPR표정결과표명,Ru-Fe/Al2 O3중Fe여Ru산생교강적상호작용,촉진Ru적분산차조변료Ru적전자특성。
Fe-modified Ru/Al2 O3 ( Ru-Fe/Al2 O3 ) catalysts were prepared by adsorption-precipitation ( AP ) method with alumina as the support and characterized by H2-TPR, XRD and XPS;the effect of Fe modification on the catalytic performance of Ru-Fe/Al2 O3 was investigated in the selective hydrogenation of dimethyl meleate ( DMM) to dimethyl succinate ( DMS) . The results indicated that through the modification with a Fe/Ru atomic ratio above 2, the catalytic performance of Ru-Fe/Al2 O3 and its stability towards high temperature oxidation-reduction treatment is obviously enhanced. Under 70℃, 1. 0 MPa and with a stirring speed of 600 r/min, the conversion of DMM and the selectivity to DMS were both nearly 100%. The XPS and H2-TPR results suggest that the promoting effect of Fe on Ru-Fe/Al2 O3 may be ascribed to an increase of Ru dispersion as well as achange in Ru electronic state through the modification with Fe.