Multi-dimensional assessment for the novel carbon capture process integrated the low-temperature adsorption and desorption

Abstract

The heat-integrated solid adsorbent process exhibits the potential to become an energy-saving method for CO2 capture. Here, a super thermal integrated process (STILT) for CO2 capture is proposed based on our experimental data. The novel process strengthened the process of internal thermal integration and significantly improved the total energy efficiency. This study further takes the commercial MEA process as the benchmark for the multi-dimensional assessment (considering the techno-economic-environment). When CO2 products are compressed to 110 bar, the energy efficiency of the STILT process and MEA process is 53.45 % and 48.8 %, and the energy consumption is 1.5 MJ/kgCO2 and 3.41 MJ/kgCO2. Without CO2 compression, the energy efficiencies of the STILT process and MEA process are 55.3% and 50.61%. The energy consumptions are 0.82 MJ/kgCO2 and 2.63 MJ/kgCO2. Due to the combination of internal thermal integration and enhanced CO2 circulation capacity, the capture costs of the STILT process are 25.8–34.94 €·t−1 CO2, which significantly outweigh the MEA process (43.3–55.07 €·t−1 CO2). This exhibits the superior techno-economic-environment advantages of the STILT process. This study harbors tremendous referential significance for the design and scale-up of the industrial CO2 capture process.