中孔分子筛负载的钴基催化剂F—T合成反应研究  

Cobalt Supported Mesoporous Silica Catalyst for Fischer- Tropsch Synthesis

作　　者：杨文书[1] 高海燕[1] 相宏伟[1] 银董红[1] 杨勇[1] 杨继礼[1] 徐元源[1] 李永旺[1] 

机构地区：[1]中国科学院山西煤炭化学研究所,

出　　处：《化学学报》2001年第11期1870-1877,共8页Acta Chimica Sinica

基　　金：国家重点基础研究发展计划(973计划)

摘　　要：以中孔分子筛HMS-2为载体,浸渍法制得钴质量分数为15.00%的钴基催化剂,F-T合成反应研究表明:载体焙烧时间对F-T合成反应性能影响不大;Co/HMS-2催化剂的F-T合成反应在运行141.00h达到483.00K后,在H2/CO摩尔比为2.00,压力2.00MPa,空速500.00h-1反应条件下,CO转化率达到88.00%,烃选择性保持在98.00%左右,烃分布中C5+含量可达85.00%左右,进一步运转了384.00h,CO转化率仅下降了9.00%,而烃选择性和烃分布几乎不变,说明C0/HMS-2催化剂F-T合成反应性能和稳定性优异.载体中孔结构在473.00K催化剂开始F-T合成反应24.00h后已经塌陷,随后催化剂结构趋于稳定.A novel cobalt supported hexagonal mesoporous silica catalyst for F - T synthesis has been developed. The activity in the F - T synthesis, the stability, and the structure changes for the catalyst were investigated. Under the conditions of n (H-2) : n (CO) = 2. 00, T = 483. 00 K, p = 2. 00 MPa, GHSV = 500. 00 h(-1), this catalyst showed stable activity with low methane selectivity, and high C-5(+) selectivity being about 85. 00% during 525. 00 hours on stream. After 24. 00 hours of reaction, XRD at the low angle for the mesoporous silica disappeared, which confirmed that the mesoporous structure collapsed soon in the F - T synthesis, but remained relatively stable afterwards.

关 键 词：中孔分子筛 F-T合成 钴基催化剂 负载型催化剂 煤 天然气 合成气 液体燃料 

分 类 号：TQ529.2[化学工程—煤化学工程] TE646[石油与天然气工程—油气加工工程]