纳米碳纤维/蜂窝状堇青石催化剂载体的结构控制  

Structure Control of CNFs/Cordierite Monolith as Catalyst Support

作　　者：王艳莉[1] 李翠[1] 詹亮[1] 乔文明[1] 凌立成[1] 

机构地区：[1]华东理工大学化学工程联合国家重点实验室,上海200237

出　　处：《华东理工大学学报（自然科学版）》2012年第5期567-572,共6页Journal of East China University of Science and Technology

基　　金：国家自然科学基金(20806024;51002051;50672025);中央高校基本科研业务费专项资金(WA1014016);上海市自然科学基金(RZR1407200)

摘　　要：以Ni为催化剂、乙烯作碳源,制备了纳米碳纤维/蜂窝状堇青石催化剂载体,并考察了制备工艺对所制纳米碳纤维(CNFs)产率及形貌的影响。结果表明:当生长温度从450℃升至650℃时,CNFs的产率先增加后降低;当生长时间由5min延长至30min时,CNFs的产率从4.9%提高到12.5%,随着生长时间的进一步延长,增长趋于平缓;较高的C2H4/H2流量比有利于提高CNFs的产率;在500℃、30min、VC2H4∶VH2=160∶40的最佳工艺条件下,CNFs的产率及所制载体的压缩强度分别达12.5%和34.46MPa。As catalyst carriers, carbon nanofibers （CNFs） were grown on A120：^-coated cordierite monolith by using Ni as catalyst and ethylene as carbon source. The effect of growth conditions on the yield and morphology of CNFs was investigated. Results show that at the temperature range of 450 -650 ℃, the yield of synthesized CNFs increases with increasing growth temperature from 450 ℃ to 550 ℃ but decreases with further increasing growth temperature to 650 ℃. With increasing growth time from 5 min to 30 min, the CNFs yield increases from 4.9% to 12.5%, while the growth of CNFs is leveled out after 30 min. The yield of CNFs is improved by increasing volume ratio of C2 H4 to H2 in the feed gas. Under the optimal growth conditions with VC2H4 - VH2 =160 ： 40 at 500 ℃ for 30 min, the yield of synthesized CNFs reaches 12.5 %, and the CNFs/cordierite monolith obtained exhibits a compressive strength of 34.46 MPa.

关 键 词：蜂窝状堇青石 纳米碳纤维 NI 催化剂载体 

分 类 号：TQ383[化学工程]