ScholarWorks@성균관대학교

초록

This study investigates the heterogeneous catalytic mechanism of long-chain linear alpha-olefin (LAO) oligomerization, which can be derived from biobased organic acids, over silica-supported 12-tungstophosphoric acid (TPA) catalysts. Higher TPA loadings improved the formation of C32 oligomers due to higher density of medium + strong acid sites, emphasizing the importance of strong acid sites as active centers. The oligomerization followed a stepwise oligomerization pathway based on an Eley-Rideal mechanism. The process began with the dimerization of two 1-octene molecules to produce C16, followed by the reaction of C8 with C16 to generate C24. Notably, C32 was preferentially formed through the coupling of two C16 molecules, rather than through the reaction between C24 and C8 due to steric hindrance. Microkinetic analysis further revealed that the adsorption behavior of large oligomers significantly influenced overall oligomerization performance.

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