The Cracking Reaction of Vacuum Gas Oil on Mordenite Modified by HF and Steaming

불화수소산과 스팀처리한 모더나이트상에서 진공가스유의 분해반응

  • Lee, Kyong-Hwan (Dept. of Chem. Eng., College of Eng., Hanyang Univ.) ;
  • Ha, Baik-Hyon (Dept. of Chem. Eng., College of Eng., Hanyang Univ.)
  • 이경환 (한양대학교 공과대학 화학공학과) ;
  • 하백현 (한양대학교 공과대학 화학공학과)
  • Received : 1996.05.21
  • Accepted : 1996.08.03
  • Published : 1996.10.10

Abstract

Three types of mordenites treated by steaming($SM_{6.5}$), HF solution for $SM_{6.5}(FM_a)$ and HF solutlon+steaming for $SM_{6.5}(FM_b)$ were prepared and used as cracking catalysts of vacuum gas oil. These samples were analysed by XRF and XPS for average and surface Si/Al atomic ratio, XRD for unit cell constants, nitrogen adsorption/desorption for porosity, pyridine-IR for acidic properties. In comparison with three type samples, $SM_{6.5}$ had a lot of acid amount and showed micropore volume mostly(>85% to total volume). Dealuminated $FM_a$, compared with $SM_{6.5}$, was decreased a little in acid amount and improved for porosity. Also, $FM_b$ was decreased further in acid amount and developed in mesopore dramatically. The catalytic activity and the yield of gasoline, kerosine+diesel and branched aromatic over the modified mordenites which have developed mesopore were improved. This is due to limited access of diffusion of large molecules within pore of the modified mordenites.

Keywords

Acknowledgement

Supported by : 포항공과대학

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