کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1283134 | 1497626 | 2009 | 11 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Ni/CeO2/ZSM-5 catalysts for the production of hydrogen from the pyrolysis–gasification of polypropylene Ni/CeO2/ZSM-5 catalysts for the production of hydrogen from the pyrolysis–gasification of polypropylene](/preview/png/1283134.png)
The production of hydrogen from the two-stage pyrolysis–gasification of polypropylene using a Ni/CeO2/ZSM-5 catalyst has been investigated. Experiments were conducted on CeO2 loading, calcination temperature and Ni loading of the Ni/CeO2/ZSM-5 catalyst in relation to hydrogen production. The results indicated that with increasing CeO2 loading from 5 to 30 wt.% for the 10 wt.% Ni/CeO2/ZSM-5 catalyst calcined at 750 °C, hydrogen concentration in the gas product and the theoretical potential hydrogen production were decreased from 63.0 to 49.8 vol.% and 50.4 to 21.6 wt.%, respectively. In addition, the amount of coke deposited on the catalyst was reduced from 9.5 to 6.2 wt.%. The calcination temperature had little influence on hydrogen production for the catalyst containing 5 wt.% of CeO2. However, for the 10 wt.% Ni/CeO2/ZSM-5 catalyst with a CeO2 content of 10 or 30 wt.%, the catalytic activities reduced when the calcination temperature was increased from 500 to 750 °C. The SEM results showed that large amounts of filamentous carbons were formed on the surface of the catalysts. The investigation of different Ni content indicates that the Ni/CeO2/ZSM-5 ((2-10)-5-500) catalyst containing 2 wt.% Ni showed poor catalytic activity in relation to the pyrolysis–gasification of polypropylene according to the theoretical potential H2 production (7.2 wt.%). Increasing the Ni loading to 5 or 10 wt.% in the Ni/CeO2/ZSM-5 ((2-10)-5-500) catalyst, high potential hydrogen production was obtained.
Journal: International Journal of Hydrogen Energy - Volume 34, Issue 15, August 2009, Pages 6242–6252