We describe a process for capturing CO₂ from the atmosphere in an industrial plant. The design captures ∼1 Mt-CO₂/year in a continuous process using an aqueous KOH sorbent coupled to a calcium caustic recovery loop. We describe the design rationale, summarize performance of the major unit operations, and provide a capital cost breakdown developed with an independent consulting engineering firm. We report results from a pilot plant that provides data on performance of the major unit operations. We summarize the energy and material balance computed using an Aspen process simulation. When CO₂ is delivered at 15 MPa, the design requires either 8.81 GJ of natural gas, or 5.25 GJ of gas and 366 kWhr of electricity, per ton of CO₂ captured. Depending on financial assumptions, energy costs, and the specific choice of inputs and outputs, the levelized cost per ton CO₂ captured from the atmosphere ranges from 94 to 232 $/t-CO₂.

我们描述了一种在工厂中从大气中捕获CO ₂的方法。该设计使用与钙苛性碱回收回路耦合的含水KOH吸附剂，在连续过程中每年捕获约1 Mt-CO ₂。我们描述了设计原理，总结了主要部门运营的绩效，并提供了由独立咨询工程公司开发的资本成本明细表。我们报告了一家中试工厂的结果，该工厂提供了有关主要部门运营绩效的数据。我们总结了使用Aspen工艺仿真计算出的能量和材料平衡。当以15 MPa的压力输送CO ₂时，该设计需要每吨CO ₂消耗8.81 GJ天然气或5.25 GJ天然气和366 kWhr的电力被抓获。根据财务假设，能源成本以及投入和产出的特定选择，从大气中捕获的每吨CO _2的平均成本为94至232美元/吨CO ₂。