To increase the yield of light olefins during the catalytic pyrolysis of alkanes, a novel hierarchical Fe-incorporated ZSM-5 molecular sieve (FeM-Z5) was synthesized using an Fe-based metal-organic framework (Fe-MOF) as a mesoporogen and iron source through the dry gel conversion (DGC) method. In contrast to the conventional method of incorporating Fe species into ZSM-5 via impregnation, the DGC method incorporates Fe species into the framework of ZSM-5, decreasing the amount of Brønsted (B) acid sites and thereby inhibiting the side reactions of hydrogen transfer during the catalytic pyrolysis of alkanes. Compared with the FeN-Z5 catalyst prepared by the DGC method with Fe(NO3)3 as an iron source, FeM-Z5 had a larger amount of strong B acid sites and more mesopores with a size range of 10–40 nm originating from the decomposition of Fe-MOF; these aspects improved n-pentane pyrolysis and ethylene and propylene diffusion. As a result, the optimal FeM-Z5 catalyst exhibited the highest yield of ethylene and propylene (33.4 wt%) and the lowest deactivation rate (0.07 %/h) among the prepared catalysts during the catalytic pyrolysis of n-pentane.
公司名称 | 产品信息 | 采购帮参考价格 |
---|---|---|
阿拉丁 |
tetrapropylammonium hydroxide
|
¥10.00~¥35979.00 |
阿拉丁 |
N,N-dimethylformamide
|
¥20.00~¥28418.73 |
麦克林 |
N-pentane
|
¥30.00~¥26404.37 |
阿拉丁 |
Ethyl orthosilicate
|
¥17.00~¥14087.00 |
阿拉丁 |
terephthalic acid
|
¥15.00~¥11951.00 |
阿拉丁 |
aluminum isopropoxide
|
¥19.00~¥10095.00 |
阿拉丁 |
ferric nitrate nonahydrate
|
¥20.00~¥8644.00 |