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During the gas recovery process, the composition of the feed gas is relatively complex: total hydrocarbons (expressed as methane) at 1.19×10-2, benzene at 0.86×10-6, methane at 4.4×10-6, ethane at <0.5×10-6, methanol at 16×10-6, ethanol at 1.02×10-2, and acetaldehyde at 125×10-6. What kind of fillers can be used to adsorb these substances selectively? Multiple types of fillers can be employed, each designed for a specific substance. It is also necessary to ensure that carbon dioxide is not absorbed in large quantities during the adsorption process; I hope those with more experience can provide some guidance! ! The following are the specifications for the purified, qualified gas: Volume fraction of carbon dioxide/10-2 ≥ 99.9; Volume fraction of water/10-6 ≤ 20. Acidity: Must meet the requirements specified in 5.4. Volume fraction of nitric oxide/10-6 ≤ 2.5; Volume fraction of nitrogen dioxide/10-6 ≤ 2.5; Volume fraction of sulfur dioxide/10-6 ≤ 1.0. Total sulfur volume fraction (excluding sulfur dioxide, expressed as sulfur)/10-6 ≤ 0.1. Total hydrocarbon volume fraction (expressed as methane)/10-6 ≤ 50 (with non-methane hydrocarbons not exceeding 20). Volume fraction of benzene/10-6 ≤ 0.02. Volume fraction of methanol/10-6 ≤ 10. Volume fraction of ethanol/10-6 ≤ 10. Volume fraction of acetaldehyde/10-6 ≤ 0.2. Volume fraction of other oxygen-containing organic compounds/10-6 ≤ 1.0. Volume fraction of vinyl chloride/10-6 ≤ 0.3. Mass fraction of oils and fats/10-6 ≤ 5. Odor, taste, and appearance of the aqueous solution: Must meet the requirements specified in 5.10. Mass fraction of evaporative residue/10-6 ≤ 10. Volume fraction of oxygen/10-6 ≤ 30. Volume fraction of carbon monoxide/10-6 ≤ 10. Volume fraction of ammonia/10-6 ≤ 2.5. Volume fraction of phosphine/10-6 ≤ 0.3. Volume fraction of hydrogen cyanide/10-6 ≤ 0.5