Morphological change of Pt/MoO3/SiO2 for the Synthesis of i-Butylene from n-Butene

N-Butene으로부터 i-Butylene 합성을 위한 Pt/MoO3/SiO2 촉매의 표면 구조 변화

  • 김진걸 (순천향대학교 공과대학 화학공학부)
  • Received : 1996.03.06
  • Accepted : 1996.09.02
  • Published : 1996.10.10


Skeletal isomerization reaction known as exothermic reaction shows possible maximum yield of i-butene from n-butene at $110^{\circ}C$ over $Pt/MoO_3/SiO_2$. Compared with conventional catalyst such as silica, zeolite, alumina etc., $Pt/MoO_3/SiO_2$ demonstrates higher yield while by-products except 2-butene do not form. Faster H spillover rate over $Pt/MoO_3/SiO_2$ is demonstrated via isothermal reduction experiment at $110^{\circ}C$ compared to the rate over $Pt/MoO_3/Al_2O_3$. Overall isomerization rates are proportional to higher spillover rates from Pt onto $MoO_3$ surface. The skeletal isomerization reaction is composed of two elementary steps. First, carbonium ion formation over Pt crystallites by H spillover. Second, carbenium ion formation over $MoO_3$ followed by formation of i-butene. Moreover, it is suggested that H spillover step from Pt surface onto $MoO_3$ is assumed to be the rate determining step and control the overall isomerization rate.



Supported by : 한국과학재단


  1. J. Molecular Catalysis v.67 J. Szabo;J. Perrotey
  2. Oil and Gas Journal
  3. J. Catal. v.23 V. R. Chouldhary;L. K. Doraiswamy
  4. J. Chem. Soc. Farad. Trans. I v.76 P. A. Sermon;G. C. Bond
  5. Surface Science v.54 J. J. Fripiat;R. Erre;H. Van Damme
  6. Chemical and Engineering News J. Haggin
  7. J. Catal. v.142 A. Pzantoja;J. Sarrin;L. Gonzalez;O. Noguera;M. J. Perez Zurita;J. L. Galavis;J. Goldwasser
  8. J. Catal. v.148 V. Ponec;Z. X. Cheng
  9. J. Catal. v.32 R. B. Levy;M. Boudart
  10. J. Less-Common Metal. v.36 G. C. Bond;J. B. P. Tripathi
  11. J. Catal. v.139 no.1 J. G. Kim;J. R. Regalbuto
  12. J. Catal. v.139 no.1 J. G. Kim;J. R. Regalbuto