氮掺杂炭颗粒的制备及其异丁烷脱氢性能研究  

Preparation of N doped activated carbon beads and their performance for isobutane dehydrogenation

作　　者：王康[1,2] 刘大永 王希涛[1,3] 石春杰 WANG Kang;LIU Da-yong;WANG Xi-tao;SHI Chun-jie(In order to invest igate carbon materiads as catalysts for dehydrogenation of low-chain alkanes School of Chemical Engineering and Technology;Tianjin Key Laboratory of Membrane Science and Desalination Technology;Tianjin Key Laboratory of Applied Catalysis Science and Technology,Tianjin University,Tianjin 300072,China)

机构地区：[1]天津大学化工学院,天津300350 [2]天津大学天津膜科学海水淡化技术重点实验室,天津300350 [3]天津大学天津应用催化科学与技术重点实验室,天津300350

出　　处：《化学工程》2019年第11期62-67,共6页Chemical Engineering(China)

基　　金：天津市自然科学基金资助项目(15JCYBJC20900)

摘　　要：为了研究炭材料作为低链烷烃脱氢催化剂,文中以水溶性酚醛树脂为炭源,三聚氰胺为氮源,采用海藻酸铵辅助溶胶-凝胶法制备了氮掺杂活性炭颗粒。采用氮吸附脱附(BET)、红外光谱(IR)、X射线电子衍射(XRD)、X射线光电子能谱(XPS)与热重(TG)等方法对氮掺杂活性炭颗粒进行了表征,并以其作为催化剂进行了异丁烷脱氢性能研究,分析了失活机理。实验结果表明:随掺杂量的提高颗粒强度降低,RAC-N(1%)的平均孔径与孔容相对较高;RAC-N(1%)的异丁烷转化率与异丁烯选择性相对较高,反应490 min后分别为20%与94%;相比未掺杂活性炭颗粒,氮掺杂活性炭颗粒的异丁烷脱氢性能提高主要是由于催化剂表面含氧官能团的增加。In order to investigate carbon materials as catalysts for dehydrogenation of low-chain alkanes,N doped activated carbon beads with water-soluble phenolic resin as carbon source and melamine as nitrogen source were prepared by alginate assisted sol-gel method.The characteristics of N doped activated carbon beads were investigated by BET,IR,XRD,XPS and TG.The catalytic performance for isobutane dehydrogenation was evaluated and the reason for decrease in catalytic activity was analyzed.The results of experiments show that the strength of beads decrease with content of N doped increasing.The average pore size and the pore volume of RAC-N(1%)is relative large.After reacting 490 min,the high conversion of isobutane and selection of isobutene of RAC-N(1%)was presented with 20%and 94%,respectively,which was attributed to the increased number of oxygen-containing functional groups.

关 键 词：氮掺杂活性碳颗粒 异丁烷脱氢 异丁烯 含氧官能团 

分 类 号：TQ127.1[化学工程—无机化工]