TY - JOUR
T1 - Heteropolyacid grafted Pt/Si-MCM-41 catalyst for C 7 skeletal isomerization
AU - Yang, Xinkun
AU - Wang, Jin An
AU - Chen, Lifang
AU - Sebastian, Silvia P.Ramirez
AU - Robledo, Arturo Manzo
PY - 2012/11/5
Y1 - 2012/11/5
N2 - A tungstophosphoric acid grafted Pt/MCM-41 catalyst was synthesized and characterized with several spectroscopic techniques. The Keggin structure of the grafted H 3PW 12O 40 (referred as HPW) was rather stable after calcination. Highly dispersed HPW created approximately 143 μmol/g Bronsted acid sites with moderate strength. In the n-heptane isomerization reaction, n-heptane conversion over Pt/H 3PW 12O 40/MCM-41 catalyst linearly increased from 5.4% to 79.2% as the reaction temperature increased from 220°C to 320°C. Below 260°C, the isomerization selectivity was 100%. At higher temperature, cracking reactions took place, producing n-butane, i-butane, and propane. The ratio of multibranched to monobranched isomers was between 0.60 and 0.85, indicating that mesostructured catalyst exhibits unique shape selectivity in the skeletal isomerization of n-heptane.
AB - A tungstophosphoric acid grafted Pt/MCM-41 catalyst was synthesized and characterized with several spectroscopic techniques. The Keggin structure of the grafted H 3PW 12O 40 (referred as HPW) was rather stable after calcination. Highly dispersed HPW created approximately 143 μmol/g Bronsted acid sites with moderate strength. In the n-heptane isomerization reaction, n-heptane conversion over Pt/H 3PW 12O 40/MCM-41 catalyst linearly increased from 5.4% to 79.2% as the reaction temperature increased from 220°C to 320°C. Below 260°C, the isomerization selectivity was 100%. At higher temperature, cracking reactions took place, producing n-butane, i-butane, and propane. The ratio of multibranched to monobranched isomers was between 0.60 and 0.85, indicating that mesostructured catalyst exhibits unique shape selectivity in the skeletal isomerization of n-heptane.
KW - Catalyst
KW - Heteropolyacid
KW - Isomerization
KW - Si-MCM-41
KW - n-Heptane
UR - http://www.scopus.com/inward/record.url?scp=84867120311&partnerID=8YFLogxK
U2 - 10.1016/j.catcom.2012.08.033
DO - 10.1016/j.catcom.2012.08.033
M3 - Artículo
SN - 1566-7367
VL - 28
SP - 202
EP - 206
JO - Catalysis Communications
JF - Catalysis Communications
ER -