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Title: A process for capturing CO 2 from the atmosphere

Here, we describe a process for capturing CO 2 from the atmosphere in an industrial plant. The design captures ~1 Mt-CO 2/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 which provides data on performance of the major unit operations. We summarize the energy and material balance computed using an Aspen process simulation. When CO 2 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 CO 2 captured. Depending on financial assumptions, energy costs, and the specific choice of inputs and outputs, the levelized cost per ton CO 2 captured from the atmosphere ranges from 94 to 232 $/t-CO 2.
 [1] ;  [2] ;  [2] ;  [2]
  1. Carbon Engineering Ltd., Squamish, BC (Canada); Harvard Univ., Cambridge, MA (United States). School of Engineering and Applied Sciences (SEAS)
  2. Carbon Engineering Ltd., Squamish, BC (Canada)
Publication Date:
Grant/Contract Number:
Published Article
Journal Name:
Additional Journal Information:
Journal Name: Joule; Journal ID: ISSN 2542-4351
Elsevier - Cell Press
Research Org:
Carbon Engineering Ltd., Squamish, BC (Canada)
Sponsoring Org:
USDOE Office of Fossil Energy (FE); Innovative Clean Energy (ICE) Fund (Canada); Sustainable Development Technology Canada (SDTC); Industrial Research Assistance Program (IRAP) (Canada)
Country of Publication:
United States
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; 29 ENERGY PLANNING, POLICY, AND ECONOMY; Air capture; direct air capture; process design; cost assessment; pilot plant data
OSTI Identifier:
Alternate Identifier(s):
OSTI ID: 1438483