甲烷裂解积炭过程中碳纤维的编织  

Study of the Formation Mechanism of Carbon Nanofiber Granules by Methane Decomposition

作　　者：曹磊[1] 陈久岭[1] 李永丹[1] 

机构地区：[1]天津大学化工学院催化科学与工程系,天津300072

出　　处：《天然气化工—C1化学与化工》2004年第1期23-26,共4页Natural Gas Chemical Industry

摘　　要：利用透射电镜、扫描电镜和比表面测定等方法,研究了Ni Cu/Al2O3催化剂上甲烷裂解反应形成的碳纤维的编织行为,提出了宏观碳颗粒的形成机理是一个两步过程:初始阶段催化剂颗粒在少量碳纤维形成后发生进一步破碎,并被碳纤维包裹形成一次聚集体,而后这些一次聚集体再被后来生长的碳纤维编织成宏观的碳颗粒。同时,碳颗粒的比表面值受碳纤维生成量和助剂铜的加入的影响。The formation mechanism of carbon nanofiber granules was studied by a combination of SEM, TEM and surface area measurement. In the initial stage of granule formation, catalyst particles were cracked into smaller units by carbon fibers. Then these units grow and interlaced by latter formed carbon fibers to form a dense system of carbon granules. Surface area of carbon granules are influenced by the amount of carbon formation and copper addition.

关 键 词：甲烷裂解 碳纤维 镍催化剂 

分 类 号：O621.25[理学—有机化学]