ZnO/Cu改性Al2O3对FCC汽油选择性加氢脱硫性能的影响

以全馏分催化裂化汽油为原料，考察ZnO/Cu改性γ-Al2O3的选择性加氢脱硫性能。结果表明，ZnO、Cu双组分改性可进一步提高ZnO单组分改性后γ-Al2O3的加氢脱硫选择性。所研制的催化剂具有良好的稳定性，加氢脱硫后汽油研究法辛烷值(RON)与原料相比降低1.3个单位。通过XRD、NH3-TPD、H2-TPR及吡啶脱附FT-IR对催化剂进行表征，表明可能是由于Cu的引入提高了催化剂活化氢的能力，同时形成了较弱的酸中心，从而提高催化剂的脱硫选择性。

EFFECT OF ALUMINA MODIFIED BY ZnO/Cu ON THE SELECTIVE HYDRODESULFURIZATION OF FCC NAPHTHA

The selective hydrodesulfurization（HDS） performance of y-alumina modified by ZnO and Cu was investigated using full-range FCC naphtha as feedstock.Test results showed that as compared withγ-alumina modified by single ZnO,the HDS selectivity ofγ-alumina could be further improved by dual-component（ZnO and Cu） modification.During a 1 000 h long-run test,using a catalyst containing 10%ZnO and 1%Cu,the sulfur removal rate could be maintained at 75.0%—80.0%and with a liquid yield of 80.0%,which indicated that the catalyst possessed excellent stability.However,the RON of the treated naphtha was 1.3 units lower than that of the feedstock.The prepared catalysts were characterized by XRD,NH₃-TPD,H₂-TPR and pyridine desorption FT-IR.It seems that the incorporation of Cu could help the catalyst to activate hydrogen and form weak acid sites simultaneously,thus the HDS selectivity of the catalyst was improved.