Design, Techno-Economic Analysis, and Demonstration of the Adsorption-Circulation Desorption-Mineralization Process for Large Volumes of Exhaust Gases Containing Diluted VOCs

The treatment of large volumes of gas containing diluted volatile organic compounds is challenging because of the inefficiency of traditional technologies. This work presents the best available control technology, the adsorption-circulation desorption-mineralization (ACDM) process. In this study, a prediction method based on the Langmuir model was developed to estimate the concentration during circulation desorption. The design of circulation desorption was optimized by minimizing the total annual costs and greenhouse gas emissions. The optimal circulation percentage was 30–40%, and the most applicable temperature was 383 K. This process resulted in a relatively steady desorption concentration of 180–474 ppm and a high concentration factor of 72. The total annual costs and greenhouse gas emissions decreased by 28.3 and 31.9%, respectively, compared with those without circulation. A built-up demonstration project with a design for an operating load of 4.1 × 105 m3/h verified the applicability.