Study On The Performance Of Copper-based Catalysts For The Catalytic Hydrogenation Of CO 2 To Methanol

The greenhouse effect generated by the concentration growth of atmosphere CO₂ is increasingly more serious.How to improve this urgent environment issue have gradually turning into an universal problem.Employing CO₂ and H2 as feedstock of methanol synthesis reaction which could firstly reduce the emission of CO₂,meanwhile,as a kind of extensively used chemical material,methanol indicat a tremendous market demand.In this study,choose Cu and Zn as the main activity catalyst component,add different Al/Zr additives to synthesis Cu ZnAlZr oxide catalyst.Because of different synthesis method have impact on oxide catalyst,in this article,use co-precipitation and reverse-precipitation method to synthesis catalyst.XRD,SEM,TEM,XRF,TG-DTA,H2-TPR,H2-TPD and CO₂-TPD were used to analysis the surface structure,composition and physical charicterristics of designed catalyst.In order to probe the diversification of catalyst performance by doping in Ziconia oxide,which at rather high Al/Zr rate condition,generated a plentiful of surface copper activity species,in turn emerged an excellent catalytic activity,we evulate the influence of rection condition,like reaction pressure,temperature and different synthesis method on the catalyst reaction operation.On the other hand,precipitate method to synthesis copper-based catalyst for researching the influence of synthesis method on catalyst physical paremeter have been applied.In the CO₂ catalytic hydrogenation methanol synthsis reaction,the best activity performance?CO₂ convertion 16%,methanol selection 45% and Yield 7.2%?were acquired at reaction condition of 30 bar,240 ?,GHSV 6000 mL/gcath with catalyst Al/Zr=3:1 obtained by reverse-coprecipitation method.No deactivite were observed among 48 h reaction time,demonstrated a stable activity catalyst for Methanol synthesis from CO₂ catalytic hydrogenation reaction.