Construction of amorphous NiP@γ-Al2O3 catalyst rich in Niδ+for petroleum resin hydrogenation with enhanced hydrogenation and desulfurization activity
C9 petroleum resin(C9PR)is a thermoplastic resin polymerized from the C9 fraction of ethylene cracking byproduct.After hydrogenation modification,it can be used to obtain high-value-added hydrogenated petroleum resin(HC9PR)with light color,high antioxidant stability and good compatibility.However,C9PR has high molecular weight,high steric hindrance and impurities such as sulfide in the raw materials which are easy to poison and deactivate the catalyst,making hydrogenation extremely difficult.Herein,in order to achieve simultaneous hydrogenation and desulfurization of C9PR,we have successfully prepared the amorphous NiP@γ-Al2O3 catalyst by using chemical reduction method combined with ball milling method.The results showed that the catalyst has large specific surface area,high-content Niδ+active species,high number of active sites and strong adsorption capacity for C＝C bond.The obtained amorphous NiP@γ-Al2O3 catalyst showed an enhanced hydrogenation activity(hydrogenation degree of 98.35％)and desulfurization activity(sulfur content reduced from 122.80 μg/g to 8.00 μg/g)for C9PR hydrogenation,which is obviously superior to different crystalline nickel phosphide catalysts(the nickel phosphide was prepared by temperature programmed reduction method and loaded on γ-alumina carrier by ball milling).In addition,the amorphous NiP@γ-Al2O3 catalyst exhibited high hydrogenation degree after 100 h of continuous reaction,indicating that the catalyst had good stability.
万方数据
