Reaction Kinetics and Catalysis Letters

, Volume 41, Issue 2, pp 309–314 | Cite as

Hydroisomerization and hydrocracking of 2-methylhexane on PtUSHY catalysis. Effect of platinum content

  • F. Alvarez
  • F. Ramôa Ribeiro
  • M. Guisnet


The stability and the ratio of the isomerization to cracking rates increase very much with platinum introduction and the isomer and cracking product distributions are significantly modified. This can be explained by the change from an acid to a bifunctional mechanism. However, platinum has practically no effect on the rate of 2-methylhexane transformation. This could be attributed to the fact that neither on USHY nor on PtUSHY is the formation of the carbenium ions with a 2-methylhexane skeleton the limiting step.


Physical Chemistry Platinum Catalysis Product Distribution Hydrocracking 
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Стабильность и соотношение скоростей изомеризации и крекинга сильно повышаются с введением платины, что приводит к значительному модифицированию распределения продуктов изомеризации и крекинга. Зто объясняют изменением механизма от кислого к бифункциональному. Однако, платина практически не влияет на скорость превращения 2-метилгексана. Зто приписывют тому факту, что образование карбениевого иона со скелетом 2-метилгексана не является лимитируюей ступенью ни на USHY, ни на PtUSHY.


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Copyright information

© Akadémiai Kiadó 1990

Authors and Affiliations

  • F. Alvarez
    • 1
  • F. Ramôa Ribeiro
    • 1
  • M. Guisnet
    • 2
  1. 1.Grupo de Estudos de Catálise HeterogéneaI.S.T.Lisboa Codex(Portugal)
  2. 2.UA CNRS 350Université de PoitiersPoitiers Cedex(France)

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