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Conversion of C 8 aromatics over a dual-bed catalyst.

Peixi FengChenglin KangZhenhuan ZhouXin YueZhongxun LiuYueting GaiJunjun ShiBaoning Zong
Published in: RSC advances (2024)
A dual-bed catalyst was prepared for the conversion of C 8 aromatics. The upper bed layer consisted of ZSM-5 covered with SiO 2 , primarily utilized for ethylbenzene dealkylation. By employing tetraethyl orthosilicate (TEOS) as a deposition agent through the chemical liquid deposition (CLD) method, the modified ZSM-5 catalyst exhibited optimal catalytic performance at a TEOS addition of 0.6 g per gram of catalyst. The lower bed layer contained ZSM-39 catalyst, mainly employed for xylene isomerization reaction. ZSM-39 was synthesized using pyrrolidine as the template, and the best catalytic performance was achieved when the OH - /SiO 2 molar ratio in the synthesis system was 0.05. The mass ratio between the upper and lower agents was maintained at 1 : 1. Compared to traditional single-bed ZSM-5 catalysts, the dual-bed catalyst demonstrated enhanced activity and selectivity.
Keyphrases
  • ionic liquid
  • highly efficient
  • room temperature
  • reduced graphene oxide
  • metal organic framework
  • carbon dioxide
  • visible light
  • liquid chromatography
  • tandem mass spectrometry