Abstract
Zr0.5Ti0.5O2was prepared by co-precipitation and tested for its catalytic performance under supercritical conditions when mixed with a CeO2-Al2O3(CA) base catalyst.The catalysts were characterized with an automatic adsorption instrument(BET method),X-ray diffraction(XRD),transmission electron microscopy(TEM),and temperature programmed desorption(TPD).It was found that Zr0.5Ti0.5O2significantly lowered the temperature of the cracking reaction,and increased the thermal cracking gas rate by a factor of2.8 times as large as that at 600 °C for the CA base catalyst.The gas rate was increased by a factor of 4.0 times when it was doped into the CA base catalyst,and the heat sink increased by 0.55 MJ kg 1over that of thermal cracking at 650 °C.BET results show that the Zr0.5Ti0.5O2-doped CA base catalyst has a double-pore structure that enhances ethylene selectivity.NH3-TPD result indicates that the acidity of the catalyst increased by 4.0times,indicating improved surface acidity conducive to alkene generation.
Published Version (
Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call