2.6 Elementary Steps of Acid-Base Catalyzed Reactions in Molecular Sieves

Modern solid state double resonance NMR strategies for the structural characterization of adsorbate complexes involved in the MTG process

“…The conversion of methanol to gasoline (MTG) or olefines (MTO) is an important example of hetereogenous catalysis using zeolites. 1,2 Ever since its observation by Silvestri, 3 the reaction pathway and possible intermediates have been the subject of numerous theoretical [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23] and experimental [24][25][26][27][28][29][30][31][32][33][34][35][36] studies. As the initial step the interaction of the methanol molecule and the Brønsted acid site, the bridging hydroxy groups on the zeolite surface, located next to the aluminium atom is undisputed.…”

“…On the experimental side, solid state NMR 25,27,28,30,34 and IR 24,26 techniques have been used to study the nature of the adsorbate complexes and to follow the catalytic reactions in situ. The majority of the work concerning the MTG process presented to date utilized ex situ batch reaction conditions, i.e.…”