Master-thesis: Atmospheric Carbon Capture: A Review on Current Technologies and Analysis of Energy Consumption for Various Direct Air Capture (DAC) Systems

by Jennifer Perskin, Embry-Riddle Aeronautical University, https://commons.erau.edu/edt/728

The discussion of energy consumption for cryogenic and combined direct air capture systems is explored in this study. The investigation of precompression of atmospheric air for a direct-air capture CO₂ system using an attached “waste-cool” precooler is examined. In this novel approach, a thermodynamic model based on psychrometric theories is evaluated to determine the required work input of the system at various inlet compression ratios and various inlet temperatures. Turbine recovery is also considered for the potential to capture “waste energy.” A pressure swing adsorption unit is evaluated as another modification to the cryogenic system to minimize energy consumption.

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