期刊
ACS CATALYSIS
卷 3, 期 6, 页码 1360-1364出版社
AMER CHEMICAL SOC
DOI: 10.1021/cs400349p
关键词
Heterogeneous catalysis; Ethylene oligomerization; Ethylene polymerization; Tantalum catalysis; Surface organometallic chemistry
资金
- SABIC
Ethylene oligomerization to linear low-molecular-mass alpha-olefins is an open industrial challenge. Ta-based catalysts are promising systems, but the unclear understanding of their behavior prevents systematic advances in the field. We demonstrate here that a well-defined (-SiO)(3)Ta-III species is able to promote ethylene oligo-/polymerization without any cocatalyst, confirming that the active species in Ta systems corresponds to a Ta-III species. DFT calculations On a series of Ta systems ranging from ethylene trimerization to ethylene polymerization catalysts highlight the key factors controlling their experimental behavior. Comparison of these Ta systems allows one to set general rules for the rational development of new ethylene Ta oligomerization catalysts.
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