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The design and operational space of syngas production via integrated direct air capture with gaseous CO2 electrolysis
Hussain M. Almajed, Omar J. Guerra, Ana Somoza-Tornos, Wilson A. Smith, Bri-Mathias Hodge
April 4, 2024 (v1)
Keywords: Carbon Dioxide Capture, CO2 electrolysis, Direct air capture, Modelling, Syngas, Technoeconomic Analysis
The overarching goal of limiting the increase in global temperature to ≤ 2.0˚ C likely requires both decarbonization and defossilization efforts. Direct air capture (DAC) and CO2 electrolysis stand out as promising technologies for capturing and utilizing atmospheric CO2. In this effort, we explore the details of designing and operating an integrated DAC-electrolysis process by examining some key parameters for economic feasibility. We evaluate the gross profit and net income to find the most appropriate capacity factor, average electricity price, syngas sale price, and CO2 taxes. Additionally, we study an optimistic scenario of CO2 electrolysis and perform a sensitivity analysis of the CO2 capture price to elucidate the impact of design decisions on the economic feasibility. Our findings underscore the necessity of design improvements of the CO2 electrolysis and DAC processes to achieve reasonable capacity factor and average electricity price limits. Notably, CO2 taxes and tax credits... [more]