TY - JOUR
T1 - Oligomerization of isobutene on sulfated titania
T2 - Effect of reaction conditions on selectivity
AU - Mantilla, A.
AU - Tzompantzi, F.
AU - Ferrat, G.
AU - López-Ortega, A.
AU - Alfaro, S.
AU - Gómez, R.
AU - Torres, M.
N1 - Funding Information:
We acknowledge CONACYT for financial support given to this work.
PY - 2005/10/30
Y1 - 2005/10/30
N2 - On sulfated titania prepared by gelling titanium alkoxide with sulfuric acid, isobutene oligomerization was carried out under different operating conditions. Under severe conditions [temperature 140 °C, pressure 600 psi and weight hourly space velocity (WHSV) of 2.5 h-1], the catalyst reached 100% isobutene conversion and selectivity for C12= and C18= olefins of 54 and 39%, respectively. Meanwhile, under soft conditions (28 °C, 100 psi and 10 h-1), conversion decreased from an initial value of 55-25% after 30 h on stream, while the selectivity for C8= increased from 42 to 60%. After 90 h on stream, catalyst activity was recovered by introducing nitrogen into the feed and the conversion then reached 90%. These results show that by varying the operating conditions over a sulfated titania catalyst, isobutene oligomerization can be controlled to the desired C8= or C12= olefin yield.
AB - On sulfated titania prepared by gelling titanium alkoxide with sulfuric acid, isobutene oligomerization was carried out under different operating conditions. Under severe conditions [temperature 140 °C, pressure 600 psi and weight hourly space velocity (WHSV) of 2.5 h-1], the catalyst reached 100% isobutene conversion and selectivity for C12= and C18= olefins of 54 and 39%, respectively. Meanwhile, under soft conditions (28 °C, 100 psi and 10 h-1), conversion decreased from an initial value of 55-25% after 30 h on stream, while the selectivity for C8= increased from 42 to 60%. After 90 h on stream, catalyst activity was recovered by introducing nitrogen into the feed and the conversion then reached 90%. These results show that by varying the operating conditions over a sulfated titania catalyst, isobutene oligomerization can be controlled to the desired C8= or C12= olefin yield.
KW - Acid catalysts
KW - Gasoline production
KW - Isobutene oligomerization
KW - Olefin dimerization
KW - Olefin oligomerization
KW - Sulfated titania
UR - http://www.scopus.com/inward/record.url?scp=26844493793&partnerID=8YFLogxK
U2 - 10.1016/j.cattod.2005.07.153
DO - 10.1016/j.cattod.2005.07.153
M3 - Artículo
AN - SCOPUS:26844493793
SN - 0920-5861
VL - 107-108
SP - 707
EP - 712
JO - Catalysis Today
JF - Catalysis Today
ER -