Ni_xP/Zr-MCM-41新型加氢脱氧催化剂的制备、表征及其催化性能  

Preparation,Characterization and Catalytic Performance of the New Catalysts Ni_xP/Zr-MCM-41

作　　者：郭威[1] 曹阳[1] 李进[1] 罗楠[1] 赵子为[1] 

机构地区：[1]海南大学材料与化工学院,海南海口570228

出　　处：《石油学报（石油加工）》2016年第5期891-897,共7页Acta Petrolei Sinica(Petroleum Processing Section)

基　　金：海南省重点项目(ZDXM2015116和ZDXM20120072);海南省自然科学基金项目(20152028)资助

摘　　要：采用水热法合成了载体MCM-41与Zr-MCM-41,再由不同初始n（Ni）/n（P）的Ni（NO3）2·6H2O和（NH4）2HPO4溶液与Zr-MCM-41经过共浸渍、高温焙烧、氢气程序还原和钝化制备了5个不同n（Ni）/n（P）的NixP/Zr-MCM-41新型加氢脱氧催化剂。采用XRD、XPS、TEM等方法对催化剂进行了表征,并采用高压反应釜评价了不同n（Ni）/n（P）的NixP/Zr-MCM-41催化麻风树油加氢脱氧反应的性能。结果表明,n（Ni）/n（P）=2的NixP/Zr-MCM-41的活性组分为Ni12P5,其余4种NixP/Zr-MCM-41的活性组分均为Ni2P。在反应温度350℃、压力4.0 MPa下,各NixP/Zr-MCM-41催化剂均具有优异的加氢脱氧性能;当Ni12P5作为催化活性组分时,催化麻风树油加氢脱氧反应的脱氧率高达95.75%,而n（Ni）/n（P）=1的NixP/Zr-MCM-41所得脱氧率也达93.90%。其中,除n（Ni）/n（P）=1/2的NixP/Zr-MCM-41外,其余4个NixP/Zr-MCM-41催化所得产物油中C15-C20组分均占直链烷烃组分50%以上,因此,柴油组分产率较高。MCM-41 and Zr-MCM-41 were synthesized by hydrothermal method. Five NixP/Zr-MCM-41 catalysts with different n(Ni)/n(P) were synthesized by co-impregnation, calcination, the temperature program reduction (H2-TPR) and passivation, and characterized by XRD, XPS, Py-IR, TEM and BET methods. The catalytic performance of NixP/Zr-MCM-41 in hydrodeoxygenation (HDO) of jatropha curcas oil was evaluated in the pressure reactor. Results indicated that the catalytic active component was Ni12P5in the NixP/Zr-MCM-41 with n(Ni)/n(P) of 2, while Ni2P was the catalytic active component in other four NixP/Zr-MCM-41. Under the reaction temperature of 350 and the reaction pressure of 4.0 MPa, the five NixP/Zr-MCM-41 catalysts had excellent HDO performance. With the Ni12P5/Zr-MCM-41 catalyst, the HDO rate of jatropha curcas oil reached up to 95.75%, and the HDO rate over Ni2P/Zr-MCM-41 with n(Ni)/n(P) of 1 was 93.90%. Expect of the NixP/Zr-MCM-41 with n(Ni)/n(P) of 1/2, over other four NixP/Zr-MCM-41 catalysts the generated oil contained C15-C20straight-chain paraffins above 50% of the product, meaning that the biodiesel yield was high. © 2016, Science Press. All right reserved.

关 键 词：Ni2P/Zr-MCM-41 加氢脱氧 麻风树油 新型催化剂 生物柴油 

分 类 号：TE667[石油与天然气工程—油气加工工程]