钯前驱体对生物柴油加氢异构催化剂性能的影响  

Effects of palladium-based precursors on performance of catalysts for hydro-isomerization of biodiesel

作　　者：贾云刚[1] 张铁珍[1] 邓旭亮[1] 吴显军[1] 李海岩[1] JIA Yun-gang;ZHANG Tie-zhen;DENG Xu-liang;WU Xian-jun;LI Hai-yan(Daqing Petrochemical Research Center,Petrochemical Research Institute,PetroChina Company Limited,Daqing 163714,China)

机构地区：[1]中国石油天然气股份有限公司石油化工研究院大庆化工研究中心,黑龙江大庆163714

出　　处：《现代化工》2023年第4期194-197,204,共5页Modern Chemical Industry

摘　　要：以硝酸钯[Pd(NO_(3))_(2)]、氯钯酸[H_(2)PdCl_(6)]、二硝基四氨合钯[Pd(NH_(3))_(4)(NO_(3))_(2)]为浸渍液制备了Pd/SAPO-31双功能催化剂,考察了钯盐前驱体对生物柴油加氢异构性能的影响。利用N2物理吸附、NH3-TPD、Py-IR和H_(2)化学吸附等对催化剂进行表征。结果表明,最适宜的钯前驱体为硝酸钯[Pd(NO_(3))_(2)]。在固定床反应器中进行正十六烷的异构化反应的最佳条件为:催化剂用量为200 mL、压力为2.0 MPa、反应温度为350℃、空速为1.5、氢油比为500∶1,此时,正十六烷的转化率最高可达85%以上。当凝固点为0℃、闪点为60℃、十六烷值为74时,生物柴油的产率最高,为92.2%。Pd/SAPO-31 bifunctional catalysts are prepared by using palladium nitrate(Pd(NO_(3))_(2)),ammonium chloroplatinate(H_(2)PdCl_(6)),and tetraamminepalladium dinitrate(Pd(NH_(3))_(4)(NO_(3))_(2))solution respectively as impregnating agent.The effects of palladium-based precursors on the performance of the catalysts in hydroisomerism of biodiesel are investigated.The catalysts are also characterized by means of N2 sorption-desorption,NH3-TPd,Py-IR and H_(2)chemical adsorption.It is indicated that palladium nitrate is the most suitable precursor.The optimal conditions for the isomerization of n-hexadecane in a fixed-bed reactor are as follows:the dosage of the catalyst is 200 mL,the pressure is 2.0 MPa,the reaction temperature is at 350℃,WHSV is 1.5,and hydrogen/oil ratio is 500:1,under which the highest conversion of n-hexadecane can exceed 85%.The yield of biodiesel reaches the highest,92.2%whten the solidifying point is 0℃,flash point is 60℃and cetane number is 74.

关 键 词：钯前驱体 SAPO-31 加氢异构 生物柴油 

分 类 号：TE6[石油与天然气工程—油气加工工程]