TY - JOUR
T1 - Acid-base and catalytic properties of alkali metal exchanged ZSM5
AU - Derewinski, M.
AU - Haber, J.
AU - Ptaszynski, J.
AU - Lercher, J. A.
AU - Rumplmayr, G.
PY - 1986
Y1 - 1986
N2 - The acid-base properties of a series of alkali metal exchanged ZSM5 zeolites were investigated by Lr. spectroscopy, temperature programmed desorption and reaction and with catalytic measurements. The samples have moderately strong Lewis acid sites (Li>Na>K>Rb>Cs) and weak base sites. A comparison of the desorption behaviour of ammonia and pyridine with that of benzene revealed that the former compounds adsorb exclusively via their nitrogen atom, while benzene interacts with itsπ electron system. With all probe molecules LiZSM5 was found to be the most acidic and CsZSM5 to be the least acidic sample prepared. Temperature programmed and catalytic reactions of propan-2-01 reveal a similar order of acidity, the base properties seem, however, not to change significantly.
AB - The acid-base properties of a series of alkali metal exchanged ZSM5 zeolites were investigated by Lr. spectroscopy, temperature programmed desorption and reaction and with catalytic measurements. The samples have moderately strong Lewis acid sites (Li>Na>K>Rb>Cs) and weak base sites. A comparison of the desorption behaviour of ammonia and pyridine with that of benzene revealed that the former compounds adsorb exclusively via their nitrogen atom, while benzene interacts with itsπ electron system. With all probe molecules LiZSM5 was found to be the most acidic and CsZSM5 to be the least acidic sample prepared. Temperature programmed and catalytic reactions of propan-2-01 reveal a similar order of acidity, the base properties seem, however, not to change significantly.
UR - http://www.scopus.com/inward/record.url?scp=79957539731&partnerID=8YFLogxK
U2 - 10.1016/S0167-2991(09)60970-8
DO - 10.1016/S0167-2991(09)60970-8
M3 - Article
AN - SCOPUS:79957539731
SN - 0167-2991
VL - 28
SP - 957
EP - 964
JO - Studies in Surface Science and Catalysis
JF - Studies in Surface Science and Catalysis
IS - C
ER -