介孔碳负载Mo_(2)N催化剂的制备及加氢脱氧  

Preparation and hydrodeoxygenation of Mo_(2)N catalysts supported on mesoporous carbon

作　　者：江雅洁 赵梦阳 张朋 鲁墨弘[1] 朱劼[1] 李明时[1] 单玉华[1] JIANG Ya-jie;ZHAO Meng-yang;ZHANG Peng;LU Mo-hong;ZHU Jie;LI Ming-shi;SHAN Yu-hua(Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology,Advanced Catalysis and Green Manufacturing Collaborative Innovation Center,School of Petrochemical Engineering,Changzhou University,Changzhou 213164,China)

机构地区：[1]江苏省绿色催化材料与技术重点实验室,江苏省先进催化与绿色制造协同创新中心,常州大学石油化工学院,江苏常州213164

出　　处：《高校化学工程学报》2021年第3期476-482,共7页Journal of Chemical Engineering of Chinese Universities

基　　金：国家自然科学基金(21761132006,21676029);江苏高校优势学科建设工程;江苏省研究生科研与实践创新计划(SJCX20_0963)。

摘　　要：为了制备介孔碳负载的Mo_(2)N催化剂,提出先碳化再氮化的程序升温法。研究不同碳化过程(不同的升温程序)、不同氮化过程(NH3流量、氮化气体组成)、Mo_(2)N负载量对催化剂加氢脱氧(HDO)反应性能的影响。通过N2物理吸附比表面积(BET)、X射线多晶衍射(XRD)、X射线光电子能谱仪(XPS)和透射电子显微镜(TEM)等表征手段对催化剂的孔结构、价态、表面形貌、颗粒尺寸等进行分析。结果表明,采用该方法制备的催化剂中活性组分Mo_(2)N嵌入介孔碳孔壁中,提高了Mo_(2)N的分散度和稳定性。低温阶段较慢的升温速率和高温阶段较快的升温速率及较大气体流速有利于Mo_(2)N的生成。最佳反应条件下甲氧基苯酚的转化率为100%,主产物苯的选择性达65.2%。Mo_(2)N catalysts supported on mesoporous carbon were prepared by the temperature-programmed carbonization and re-nitridation.The effects of different carbonization processes(different temperature programs),different nitriding processes(NH3 flow rate,gas composition)and the Mo_(2)N loading on hydrodeoxygenation(HDO)performance of the catalyst were investigated.The pore structure,valence state,surface morphology and particle size of the catalysts prepared were analyzed by N2 physical adsorption(BET),X-ray diffraction(XRD),X-ray photoelectron spectroscopy(XPS)and transmission electron microscope(TEM).The characterization results show that Mo_(2)N particles were embedded into mesoporous carbon porous wall,which improved the dispersion and stability of Mo_(2)N.The slower heating rate in the low temperature phase,the faster heating rate in the high temperature phase and larger gas flow rate were beneficial to the formation of Mo_(2)N.The conversion of guaiacol and the selectivity of the main product benzene were 100%and 65.2%respectively under the optimum reaction conditions.

关 键 词：介孔碳 氮化钼 甲氧基苯酚 加氢脱氧 

分 类 号：TQ426.6[化学工程]