中孔β沸石酸性质和孔道结构对催化柴油加氢开环性能的影响  

Effects of Acidity and Mesopore Structure of β Zeolites on Hydrogenation and Ring-Opening Performances in Hydrotreating of Catalytic Light Cycle Oil

作　　者：王健[1] 秦波[2] 李文林 杜艳泽[1,2] 郑家军[1] 李瑞丰[1] 

机构地区：[1]太原理工大学能源化工与催化研究中心,山西太原030024 [2]中国石化抚顺石油化工研究院,辽宁抚顺113001

出　　处：《石油学报（石油加工）》2018年第1期48-55,共8页Acta Petrolei Sinica(Petroleum Processing Section)

基　　金：国家自然科学基金项目(U1510127和21376157);中国石油化工股份有限公司项目(116050)资助

摘　　要：以中孔β沸石为加氢裂化活性组分,Ni和Mo为加氢活性组分,采用混捏法制备了2种催化剂MMβ-1和MMβ-2,采用XRD、N2吸附-脱附、NH3-TPD、Py-IR、SEM、TEM等手段表征催化剂。结果表明,中孔β沸石具有较大的外比表面积、适宜的中孔纳米孔径和孔体积,以及可调变的酸性能。以催化柴油为原料,在固定床加氢装置上考察了温度和体积空速对MMβ-2加氢催化剂加氢开环性能的影响,比较了MMβ-1和MMβ-2催化剂相同反应条件下的加氢开环性能。结果表明,在体积空速2h-1、温度340℃条件下,MMβ-2催化剂的开环率最高。由于Mβ-2沸石高的Br9nsted酸性质和适宜的孔道结构,以其制备的Ni-Mo/β加氢催化剂MMβ-2具有较高的加氢开环活性。Two hydrogenation catalysts were prepared by mixing and kneading mesoporeβzeolite with Ni and Mo compounds,respectively.The two catalysts were characterized by multiple approaches including XRD,N2 adsorption-desorption,NH3-TPD,IR,SEM and TEM.The results show that the mesoporeβzeolite has large external specific surface area,suitable nano pore size and pore volume,high Br9 nsted acidity content.The hydrogenation and ring-opening performances of these catalysts were evaluated with a fixed bed hydrotreating unit,using catalytic diesel as raw material.The effects of temperature and volume space velocity on the ring-opening performance of hydrogenation catalyst were investigated in detail.The results show that the highest ring-opening rate is achieved under the conditions of volume space velocity of 2 h-1 and temperature of 340℃.Compared with Mβ-1 zeolite,Mβ-2 zeolite shows higher acidity and more favorable pore structure,thus it exhibits higher ring-opening activity.

关 键 词：催化柴油 沸石 中孔 加氢 开环 

分 类 号：TE624[石油与天然气工程—油气加工工程] O643.3[理学—物理化学]