469821 Olefin Oligomerization on Carbon Supported Cobalt Catalyst: Identification of the Reaction Pathway

Thursday, November 17, 2016: 1:05 PM
Franciscan B (Hilton San Francisco Union Square)
Zhuoran Xu1, Joseph P. Chada1, Dongting Zhao1, Carlos Carrero2, Jessica Rogers3, Devon C. Rosenfeld3, Ive Hermans1 and George W. Huber1, (1)Department of Chemical and Biological Engineering, University of Wisconsin-Madison, Madison, WI, (2)Department of Chemistry, University of Wisconsin-Madison, Madison, WI, (3)The Dow Chemical Company, Freeport, TX

In this presentation we will discuss the reaction pathway involved in oligomerization of liquid 1-butene to linear octenes (in 70-85% selectivity) using carbon supported cobalt. The liquid products were characterized by 2 dimensional GCMS which allowed us to better understand the complicated reaction pathway occurring with this catalyst. The linear octene products decreased in selectivity according to 3-octene > trans-2-octene> cis-2-octene > 4-octene. Methyl-heptenes including trans/cis-5-methyl-2-heptene > trans/cis-5-methyl-3-heptene > trans-3-methyl-2-heptene (at the lowest conversion) were the other major products. The product distribution suggests the reaction pathway involves a head- to -head coupling of two 1-butene molecules to form internal linear octenes. Head- to -tail coupling of two 1-butene molecules or a coupling between 1-butene and 2-butene forms the observed methyl-heptenes. The rate of head- to -head coupling is higher than the rate of head- to -tail or the rate of 1-butene to 2-butene coupling as indicated by the higher selectivity of linear octenes. We will then compare the reaction pathway of this catalyst for 1-butene conversion to the conversion of other olefins to obtain a better mechanistic understanding of this catalyst system.

Extended Abstract: File Not Uploaded
See more of this Session: Catalytic Hydrocarbon Processing
See more of this Group/Topical: Catalysis and Reaction Engineering Division