This is a problem from the engineering field, and it is expected to design appropriate adsorbents. Q1: How to design an O₂ selective adsorbent in a mixture environment of CH₄ (60%), N₂ (20%), O₂ (3 - 8%), C₂H₆ (5%), C₂H₄ (5%)? Q2: How to design a high - performance Ne selective adsorbent in the Ne/He system (the temperature can be reduced), and it is required to reduce Ne in high - purity He gas to the ppm level? Q3: How to remove various sulfur - containing compounds, thiols, carbonyl sulfide, etc. in the coal/petroleum industrial gas system?

Q4: Design a low - partial - pressure - selective adsorbent in the high - purity electronic specialty gas system, with the requirement of removing impurities to the ppb level.