... The effect of small quantities of water and ammonia on the nature of adsorption complexes in a zeolite Y . ... It is shown that ammonia molecules adsorbed on zeolite Lewis centers bind water molecules. In the case of preliminary adsorption of water its molecules block strong acid centers in the zeolite, but also are capable to transfer protons to ammonia molecules. ... Moscow University Chemistry Bulletin . 2005, Vol. ... 4, P. 236 . ... Moscow State University, 2002 . ...