CO<sub>2</sub> Separation Performance of Zeolitic Imidazolate Framework-8 Porous Slurry in a Pilot-Scale Packed Tower
Hai Li, Bei Liu, Mingke Yang, Ding Yi Zhu, Zixuan Huang, Wan Chen, Lanying Yang, Guangjin Chen
Abstract
In this work, the mixed porous liquid–solid made of zeolitic imidazolate framework-8 (ZIF-8), 2-methylimidazole (mIm), glycol, and water was first used in a pilot-scale packed system for CO2 capture. The separation performance and equivalent work were investigated systematically. The experimental results show that CO2 removal ratio could reach 90% when the gas-slurry ratio was fixed at 100. The CO2 capture equivalent work of ZIF-8 slurry was 0.61–0.85 GJ/t, which was 57–80% of that of MEA solution. After prolonged running times, no choke happened in the packed tower and CO2 capture ability of the ZIF-8 slurry kept stable. In addition, Dixon-ring random packing showed no signs of corrosion after four month cumulative experiments, which means that ZIF-8 slurry can be applied in the packed tower for gas separation in the pilot scale.