REACTIONS OF ALCOHOLS WITH HYDROGEN-SULFIDE ON ZEOLITES .6. FT IR SPECTROSCOPY INVESTIGATION OF THE REACTION BETWEEN METHANOL AND HYDROGEN-SULFIDE ON NAX AND NAY

FTi.r. spectroscopy has been applied in studying the reaction between methanol and hydrogen sulfide on NaX and NaY zeolites, Hydrogen-bonded methanol and methoxy and carbonate species were found on both of the zeolites after methanol adsorption. Pyrrole and pyridine preadsorptian experiments have shown that methanol is chemisorbed on basic and/or c ationic sites on the zeolites used, H2S is adsorbed on the same sites. In the reaction between methanol and hydrogen sulfide on sodium zeoli tes methoxy species or HS- ions are involved. Carbonate species es can also react with H2S producing hydrogenthiocarbonates or thiocarbonate s, However, this reaction does not play any role in the interaction be tween CH3OH and H2S under the conditions used.