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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.
Authors:
 [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:
FE0026861
Type:
Published Article
Journal Name:
Joule
Additional Journal Information:
Journal Name: Joule; Journal ID: ISSN 2542-4351
Publisher:
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
Language:
English
Subject:
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:
1441045
Alternate Identifier(s):
OSTI ID: 1438483

Keith, David W., Holmes, Geoffrey, St. Angelo, David, and Heidel, Kenton. A process for capturing CO2 from the atmosphere. United States: N. p., Web. doi:10.1016/j.joule.2018.05.006.
Keith, David W., Holmes, Geoffrey, St. Angelo, David, & Heidel, Kenton. A process for capturing CO2 from the atmosphere. United States. doi:10.1016/j.joule.2018.05.006.
Keith, David W., Holmes, Geoffrey, St. Angelo, David, and Heidel, Kenton. 2018. "A process for capturing CO2 from the atmosphere". United States. doi:10.1016/j.joule.2018.05.006.
@article{osti_1441045,
title = {A process for capturing CO2 from the atmosphere},
author = {Keith, David W. and Holmes, Geoffrey and St. Angelo, David and Heidel, Kenton},
abstractNote = {Here, 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 which 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.},
doi = {10.1016/j.joule.2018.05.006},
journal = {Joule},
number = ,
volume = ,
place = {United States},
year = {2018},
month = {6}
}