The Thermodynamics-Based Benchmarking Analysis On Energy-Efficiency Performance Of Co2 Capture Technology: Temperature Swing Adsorption As Case Study

Based on the principle of thermodynamics, this study proposes a benchmarking analysis framework for evaluating the energy efficiency of carbon capture technology. First, the boundary and elements for the benchmarking framework are defined. Then, the specific heat consumption, coefficient of CO2 capture performance, and exergy efficiency are calculated as indicators for the benchmarking analysis using a general calculation method. Second, benchmarking analysis is conducted using performance data from the literature for a temperature swing adsorption (TSA) case study. Previous research is used to classify energy consumption into three TSA boundary levels: adsorbent, adsorption chamber, and adsorption system. Third, a more complete benchmarking analysis is presented based on cyclic data from a self-coded TSA simulation program. The influence of regeneration temperature and regeneration partial pressure on the energy-efficiency performance is analyzed to demonstrate the viability and fairness of the proposed benchmarking analysis method. Finally, the ways to obtain standard data for the proposed benchmarking analysis via experimental methods are discussed. The proposed method can be used to guide the current design of TSA-based carbon capture technology toward optimal energy efficiency.