C-13 AND N-15 SOLID-STATE MAS NMR-STUDY OF THE CONVERSION OF METHANOLAND AMMONIA OVER H-RHO AND H-SAPO-34 MICROPOROUS CATALYSTS

C-13 and N-15 MAS NMR have been used to study the conversion of methan ol and ammonia over H-SAPO-34 and H-RHO using sealed glass ampoules as microreactors under static batch conditions. The product peaks were w ell resolved in the C-13 NMR spectra whereas the N-15 NMR spectra gave only a single broad peak making it impossible to follow the reaction by observing this nucleus. Both catalysts give the tetramethyammonium cation whereas only zeolite H-RHO produces the monomethylammonium cati on.