Mo_2N/Zr-MCM-41新型催化剂的制备、表征及其麻疯树油加氢脱氧的催化性能  

Preparation and characterization of Mo_2N/Zr-MCM-41 catalyst and its performance in hydrodeoxygenation of Jatropha curcas oil

作　　者：谭启航 曹阳[1,2] 李进 TAN Qi-hang;CAO Yang;LI Jin(State Key Laboratory of Marine Resource Utilization in South China Sea,College of Materials and Chemical Engineering,Hainan University,Haikou 570228,China;Qiongtai Normal University,Haikou 571127,China)

机构地区：[1]海南大学南海海洋资源利用国家重点实验室材料与化工学院,海南海口570228 [2]琼台师范学院,海南海口571127

出　　处：《燃料化学学报》2018年第11期1323-1331,共9页Journal of Fuel Chemistry and Technology

基　　金：海南省重点(ZDYF2018134)项目资助~~

摘　　要：采用水热法合成载体MCM-41与不同初始n(Si)/n(Zr)的Zr-MCM-41,由(NH_4)_6Mo_7O_(24)与载体经过共浸渍、高温焙烧、氨气程序升温氮化制备了Mo_2N/Zr-MCM-41新型加氢脱氧催化剂。采用XRD、BET、XPS、TEM以及吡啶红外等手段对催化剂进行了表征,并采用高压反应釜评价了不同n(Si)/n(Zr)的Mo_2N/Zr-MCM-41催化麻疯树油加氢脱氧反应的性能。结果表明,Zr改性后的载体与纯硅MCM-41同样具有良好的孔道结构,且L酸、B酸酸值提高。Mo_2N作为活性组分体现出了优异的加氢脱氧性能,在反应温度350℃、氢气分压3.0 MPa条件下催化的产品油组成主要为直链烷烃与芳香族化合物,占产品组分的90%(质量分数)以上;不同n(Si)/n(Zr)的新型催化剂脱氧率可高达100%;芳香族化合物含量高于直链烷烃,最高可占组成的72.09%(质量分数),主要以单环、双环芳香烃为主,碳链长度分布在C_(8-16);直链烷烃碳链长度分布在C_(8-17)。通过Mo_2N/Zr-MCM-41催化后的麻疯树油经分馏处理后可制备生物燃料。MCM-41 and Zr-MCM-41 with different initial n(Si)/n(Zr)ratios were synthesized by hydrothermal method.Mo 2N/Zr-MCM-41 hydrodeoxygenation catalysts were prepared by(NH 4)6Mo 7O 24 carrier co-impregnation,calaination,temperature programing and nitridation,and characterized by XRD,XPS,TEM and Py-FTIR methods.The catalytic performance of Mo 2N/Zr-MCM-41 in hydrodeoxygenation of Jatropha curcas oil was evaluated in a high pressure reactor.The results indicate that Zr modified carrier has the same pore structure as pure silicon MCM-41,and the value of L acid and B acid increases.As the active component,the Mo 2N has an excellent HDO performance.Under the reaction temperature of 350℃and the hydrogen pressure of 3.0 MPa,the catalyzed product oil is mainly composed of straight chain alkanes and aromatic compounds,accounting for more than 90%of the product components.The deoxygenation rates of the new catalysts with different n(Si)/n(Zr)ratios are all above 98%,and the content of aromatic compounds is higher than that of straight chain alkanes,which accounts for 72.09%of the total composition.The aromatic compounds are mainly single ring and bicyclic aromatic hydrocarbons with the length of carbon chain of C 8-16.After the leprosy oils catalyzed by Mo 2N/Zr-MCM-41 are fractionated,it can be prepared to be biofuels.

关 键 词：Mo2N/Zr-MCM-41 加氢脱氧 麻疯树油 异构化 

分 类 号：O643.361[理学—物理化学]