Screening of Absorbents for Viscose Fiber CS2 Waste Air and Absorption–Desorption Process

Screening of absorbents is essential for improving the removal rate carbon disulfide (CS2) waste air by absorption. In this work, UNIFAC model in Aspen Plus was utilized to calculate excess Gibbs function and absorption potential binary system CS2 with various alcohols, ethers, esters, amines, aromatic hydrocarbons. The results were used quantitatively compare efficiency each solvent theoretical predictions then verified experiments a packed tower. showed that performance solvents roughly followed order esters < alcohols amines heavy aromatics glycol ethers. Meanwhile, N-methyl-2-pyrrolidone (NMP) optimal absorbent treatment. Additionally, process parameters desorption NMP optimized. illustrated average mass 95.2% under following conditions: liquid–gas ratio 3.75 L·m−3, temperature 20 °C, inlet concentration lower than 10,000 mg·m−3. Under conditions 115 10 kPa, time 45 min, 99.6%, water content after 0.39%. Furthermore, recycled lean liquid can maintain an excellent purification effect during recycling process.