Structured packing can improve green-methanol purification through high separation efficiency, low pressure drop and low liquid holdup. Carbon dioxide hydrogenation can create a high water load together with dissolved gases, dimethyl ether and other oxygenates. Packing and liquid distributors must be designed for minimum, normal and maximum plant loads because variable renewable operation may reduce wetting at turndown. Main rectification, light-end removal and wastewater methanol recovery should be evaluated as separate duties.

Structured packing can improve fractionation of filtered and stabilized plastic pyrolysis oil through low pressure drop, high separation efficiency and low liquid holdup. It may be the wrong choice for raw feeds containing char, wax, reactive olefins and heavy polymer-forming residues. Feed pretreatment, chlorine and water analysis, packing-channel size, distributor cleanability, vacuum performance and deposit-removal strategy must be evaluated before selecting structured packing.

Structured packing can improve refrigerant reclamation through high fractionation efficiency, low pressure drop and low liquid holdup. The design must account for mixed or fractionated refrigerant blends, high-pressure vapor density, close-boiling components, lubricant films, moisture, acids and noncondensable gases. Accurate feed identification, oil separation, small-column liquid distribution, heavy-bottom control and final composition testing are essential for producing a reliable reclaimed refrigerant.

Structured packing can improve hot potassium carbonate CO₂ absorption and regeneration through high mass-transfer efficiency and low pressure drop. Packing selection must account for concentrated-solution viscosity, activators, corrosion inhibitors, salt crystallization, foaming and circulating solids. Uniform liquid distribution, gas pretreatment, solution filtration, heat tracing and startup or shutdown control are essential. The absorber and regenerator should be evaluated separately because their hydraulic and process priorities differ.

Structured packing improves THF solvent recovery through high separation efficiency, low pressure drop and low liquid holdup, but it cannot break the THF–water azeotrope. Final dehydration requires an additional separation step. Because THF can form peroxides that concentrate in heavy bottoms, the system must also control oxygen ingress, reboiler residence time, residue withdrawal and stagnant liquid. Feed pretreatment, material compatibility, liquid distribution and vacuum performance must be evaluated together.