Fig. 4
Water vapor adsorption (○) and desorption (●) isotherms for natural (1) and acid-modified 0.25H-CLI (2), 0.5H-CLI (3), 1H-CLI (4), and 3H-CLI (5) clinoptilolite samples as well as: Pd(II)–Cu(II)/0.25H-CLI (6), Pd(II)–Cu(II)/0.5H-CLI (7), Pd(II)–Cu(II)/1H-CLI (8), and Pd(II)–Cu(II)/3H-CLI (9) catalysts at t = 21 °C. Curves 2–5 and 7–9 are shifted one from another by 0.5 P/Ps