Rosen Natalie, Welter Andreas, Schwankl Martin, Plumeré Nicolas, Staudt Júnior, Burger Jakob
Laboratory of Chemical Process Engineering, Technical University of Munich, Campus Straubing for Biotechnology and Sustainability, 94315 Straubing, Germany.
BMW Group, 85748 Garching, Germany.
Energy Fuels. 2024 Aug 6;38(16):15469-15481. doi: 10.1021/acs.energyfuels.4c02202. eCollection 2024 Aug 15.
Direct air capture (DAC) technologies are proposed to reduce the atmospheric CO concentration to mitigate climate change and simultaneously provide carbon as a feedstock independent of fossil resources. The currently high energy demand and cost of DAC technologies are challenging and could limit the significance of DAC processes. The present work estimates the potential energy demand and the levelized cost of capture (LCOC) of liquid solvent absorption and solid adsorption DAC processes in the long term. A consistent framework is applied to compare nonelectrochemical to electrochemical DAC processes and estimate the LCOC depending on the electricity price. We determine the equivalent cell voltage needed for the electrochemical steps to achieve comparable or lower energy demand than nonelectrochemical processes. The capital expenses (CapEx) of the electrochemical steps are estimated using analogies to processes that are similar in function. The results are calculated for a range of initial data of CapEx and energy demand to include uncertainties in the data.
直接空气捕获（DAC）技术被提出来用于降低大气中的二氧化碳浓度，以缓解气候变化，同时提供独立于化石资源的碳作为原料。目前DAC技术的高能源需求和成本具有挑战性，可能会限制DAC工艺的重要性。本研究长期估算了液体溶剂吸收和固体吸附DAC工艺的潜在能源需求和平准化捕集成本（LCOC）。应用一个一致的框架来比较非电化学DAC工艺和电化学DAC工艺，并根据电价估算LCOC。我们确定了电化学步骤所需的等效电池电压，以实现与非电化学工艺相当或更低的能源需求。利用与功能相似的工艺进行类比来估算电化学步骤的资本支出（CapEx）。针对一系列CapEx和能源需求的初始数据进行结果计算，以纳入数据中的不确定性。
