Pilot scale testing of an advanced solvent in a 0.7 MWe post-combustion CO2 capture unit

Frimpong, Reynolds A.; Nikolic, Heather; Bahr, David; Kiran, Gopi; Liu, Kunlei

doi:10.1016/j.ijggc.2021.103290

Title: Pilot scale testing of an advanced solvent in a 0.7 MWe post-combustion CO₂ capture unit

Abstract

An advanced Amine Promoted Buffer Solution (APBS), APBS-CDRMax® (CDRMax), developed by Carbon Clean Solutions Limited (CCSL), was tested at the 0.7 MWe CO₂ capture facility at Kentucky Utilities E.W. Brown Generation Station using a heat-integrated two-staged stripping CO₂ capture process. The performance of the solvent was evaluated to determine operating conditions that maximized the cyclic capacity of the solvent and results in energy savings. The regeneration energy ranged from 2.9 to 3.3 GJ/ton CO₂ with 14 vol % (dry) CO₂ inlet and approximately 90 % capture. The difference in the reboiler specific heat duty at stripper pressures of 1.7 and 2.1 bar was minimal as similar amounts of water vapor were observed in the CO₂ product stream at stripper outlet. Recycling of product CO₂ increased the inlet CO₂ concentration to the absorber from 14 to 16 vol% which enhanced mass transfer from the gas to the solvent resulting in about 5 % reduction in the energy of regeneration at the lower stripper pressure. The solvent circulation rate was reduced by about 30 % relative to previous 30 wt% MEA campaign for the CO₂ target capture of 90 %. Finally, the reduced solvent make-up rate of CDRMax shows promise for capitalmore »« less

Authors:

Frimpong, Reynolds A. ^[1];

^[1];

^[2]; Kiran, Gopi ^[2]; Liu, Kunlei ^[3]

Univ. of Kentucky, Lexington, KY (United States). Center for Applied Energy Research
Carbon Clean Solutions USA, Inc., Chicago, IL (United States)
Univ. of Kentucky, Lexington, KY (United States). Center for Applied Energy Research; Univ. of Kentucky, Lexington, KY (United States). Dept. of Mechanical Engineering

Publication Date:: Tue Mar 02 00:00:00 EST 2021

Research Org.:: Univ. of Kentucky, Lexington, KY (United States)

Sponsoring Org.:: USDOE Office of Fossil Energy (FE)

OSTI Identifier:: 1849106

Alternate Identifier(s):: OSTI ID: 1781975

Grant/Contract Number:: FE0007395; FE0031583

Resource Type:: Accepted Manuscript

Journal Name:: International Journal of Greenhouse Gas Control

Additional Journal Information:: Journal Volume: 106; Journal Issue: C; Journal ID: ISSN 1750-5836

Publisher:: Elsevier

Country of Publication:: United States

Language:: English

Subject:: 42 ENGINEERING; 54 ENVIRONMENTAL SCIENCES; Energy & fuels; Engineering; CO₂ capture; Pilot scale; Power plant; Advanced solvent; Heat integration

Citation Formats


                    Frimpong, Reynolds A., Nikolic, Heather, Bahr, David, Kiran, Gopi, and Liu, Kunlei. Pilot scale testing of an advanced solvent in a 0.7 MWe post-combustion CO2 capture unit.  United States: N. p., 2021. 
Web.  doi:10.1016/j.ijggc.2021.103290.

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                    Frimpong, Reynolds A., Nikolic, Heather, Bahr, David, Kiran, Gopi, & Liu, Kunlei. Pilot scale testing of an advanced solvent in a 0.7 MWe post-combustion CO2 capture unit.  United States.  https://doi.org/10.1016/j.ijggc.2021.103290

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                    Frimpong, Reynolds A., Nikolic, Heather, Bahr, David, Kiran, Gopi, and Liu, Kunlei. Tue .  
"Pilot scale testing of an advanced solvent in a 0.7 MWe post-combustion CO2 capture unit".  United States.  https://doi.org/10.1016/j.ijggc.2021.103290.  https://www.osti.gov/servlets/purl/1849106.

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@article{osti_1849106,

  title        = {Pilot scale testing of an advanced solvent in a 0.7 MWe post-combustion CO2 capture unit},

  author       = {Frimpong, Reynolds A. and Nikolic, Heather and Bahr, David and Kiran, Gopi and Liu, Kunlei},

  abstractNote = {An advanced Amine Promoted Buffer Solution (APBS), APBS-CDRMax® (CDRMax), developed by Carbon Clean Solutions Limited (CCSL), was tested at the 0.7 MWe CO2 capture facility at Kentucky Utilities E.W. Brown Generation Station using a heat-integrated two-staged stripping CO2 capture process. The performance of the solvent was evaluated to determine operating conditions that maximized the cyclic capacity of the solvent and results in energy savings. The regeneration energy ranged from 2.9 to 3.3 GJ/ton CO2 with 14 vol % (dry) CO2 inlet and approximately 90 % capture. The difference in the reboiler specific heat duty at stripper pressures of 1.7 and 2.1 bar was minimal as similar amounts of water vapor were observed in the CO2 product stream at stripper outlet. Recycling of product CO2 increased the inlet CO2 concentration to the absorber from 14 to 16 vol% which enhanced mass transfer from the gas to the solvent resulting in about 5 % reduction in the energy of regeneration at the lower stripper pressure. The solvent circulation rate was reduced by about 30 % relative to previous 30 wt% MEA campaign for the CO2 target capture of 90 %. Finally, the reduced solvent make-up rate of CDRMax shows promise for capital and operating cost savings for post-combustion CO2 capture.},

  doi          = {10.1016/j.ijggc.2021.103290},

  journal      = {International Journal of Greenhouse Gas Control},

  number       = C,

  volume       = 106,

  place        = {United States},

  year         = {Tue Mar 02 00:00:00 EST 2021},

  month        = {Tue Mar 02 00:00:00 EST 2021}

}

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Works referenced in this record:

Process integration and design for maximizing energy efficiency of a coal-fired power plant integrated with amine-based CO2 capture process
journal, April 2018

Oh, Se-Young; Yun, Seokwon; Kim, Jin-Kuk
Applied Energy, Vol. 216
DOI: 10.1016/j.apenergy.2018.02.100

Emerging CO2 capture systems
journal, September 2015

Abanades, J. C.; Arias, B.; Lyngfelt, A.
International Journal of Greenhouse Gas Control, Vol. 40
DOI: 10.1016/j.ijggc.2015.04.018

Evaluation of different solvent performance in a 0.7 MWe pilot scale CO2 capture unit
journal, August 2019

Frimpong, Reynolds A.; Nikolic, Heather; Pelgen, Jonathan
Chemical Engineering Research and Design, Vol. 148
DOI: 10.1016/j.cherd.2019.05.053

Field Demonstration of Advanced CDRMax Solvent at the US-DOE's National Carbon Capture Centre and the CO2 Technology Centre Mongstad DA, Norway
journal, July 2017

Bumb, Prateek; Patkar, P. E. Avinash; Mather, Richard
Energy Procedia, Vol. 114
DOI: 10.1016/j.egypro.2017.03.1261

Carbon capture by absorption – Path covered and ahead
journal, September 2017

Sreedhar, I.; Nahar, Tanisha; Venugopal, A.
Renewable and Sustainable Energy Reviews, Vol. 76
DOI: 10.1016/j.rser.2017.03.109

Approaching a reversible stripping process for CO2 capture
journal, January 2016

Lin, Yu-Jeng; Rochelle, Gary T.
Chemical Engineering Journal, Vol. 283
DOI: 10.1016/j.cej.2015.08.086

Process intensification for post-combustion CO2 capture with chemical absorption: A critical review
journal, November 2015

Wang, Meihong; Joel, Atuman S.; Ramshaw, Colin
Applied Energy, Vol. 158
DOI: 10.1016/j.apenergy.2015.08.083

New Configuration of the CO ₂ Capture Process Using Aqueous Monoethanolamine for Coal-Fired Power Plants
journal, April 2015

Jung, Jaeheum; Jeong, Yeong Su; Lee, Ung
Industrial & Engineering Chemistry Research, Vol. 54, Issue 15
DOI: 10.1021/ie504784p

Pilot plant study of post-combustion carbon dioxide capture by reactive absorption: Methodology, comparison of different structured packings, and comprehensive results for monoethanolamine
journal, August 2011

Mangalapally, Hari Prasad; Hasse, Hans
Chemical Engineering Research and Design, Vol. 89, Issue 8
DOI: 10.1016/j.cherd.2011.01.013

Process configuration studies of the amine capture process for coal-fired power plants
journal, August 2013

Ahn, Hyungwoong; Luberti, Mauro; Liu, Zhengyi
International Journal of Greenhouse Gas Control, Vol. 16
DOI: 10.1016/j.ijggc.2013.03.002

A review of efficiency penalty in a coal-fired power plant with post-combustion CO2 capture
journal, November 2013

Goto, Kazuya; Yogo, Katsunori; Higashii, Takayuki
Applied Energy, Vol. 111
DOI: 10.1016/j.apenergy.2013.05.020

Fluor's Econamine FG PlusSM Completes Test Program at Uniper's Wilhelmshaven Coal Power Plant
journal, July 2017

Reddy, S.; Yonkoski, J.; Rode, H.
Energy Procedia, Vol. 114
DOI: 10.1016/j.egypro.2017.03.1719

Computational Modeling and Simulation of CO ₂ Capture by Aqueous Amines
journal, May 2017

Yang, Xin; Rees, Robert J.; Conway, William
Chemical Reviews, Vol. 117, Issue 14
DOI: 10.1021/acs.chemrev.6b00662

Recent progress and new developments in post-combustion carbon-capture technology with amine based solvents
journal, September 2015

Liang, Zhiwu (Henry); Rongwong, Wichitpan; Liu, Helei
International Journal of Greenhouse Gas Control, Vol. 40
DOI: 10.1016/j.ijggc.2015.06.017

Facile Method for Determination of Amine Speciation in CO ₂ Capture Solutions
journal, May 2012

Matin, Naser S.; Remias, Joseph E.; Neathery, James K.
Industrial & Engineering Chemistry Research, Vol. 51, Issue 19
DOI: 10.1021/ie300230k

Integration of heat recovery unit in coal fired power plants to reduce energy cost of carbon dioxide capture
journal, November 2018

Garlapalli, Ravinder K.; Spencer, Michael W.; Alam, Khairul
Applied Energy, Vol. 229
DOI: 10.1016/j.apenergy.2018.08.031

Process modifications for solvent-based post-combustion CO 2 capture
journal, December 2014

Le Moullec, Yann; Neveux, Thibaut; Al Azki, Adam
International Journal of Greenhouse Gas Control, Vol. 31
DOI: 10.1016/j.ijggc.2014.09.024

A study of the CO2 capture pilot plant by amine absorption
journal, November 2012

Kwak, No-Sang; Lee, Ji Hyun; Lee, In Young
Energy, Vol. 47, Issue 1
DOI: 10.1016/j.energy.2012.07.016

Techno-Economic Analysis of a Secondary Air Stripper Process
journal, July 2017

Heberle, J. R.; Nikolic, Heather; Thompson, Jesse
Energy Procedia, Vol. 114
DOI: 10.1016/j.egypro.2017.03.1255

Pilot plant study of aqueous solution of piperazine activated 2-amino-2-methyl-1-propanol for post combustion carbon dioxide capture
journal, August 2016

Rabensteiner, Markus; Kinger, Gerald; Koller, Martin
International Journal of Greenhouse Gas Control, Vol. 51
DOI: 10.1016/j.ijggc.2016.04.035

Membrane properties required for post-combustion CO2 capture at coal-fired power plants
journal, August 2016

Roussanaly, Simon; Anantharaman, Rahul; Lindqvist, Karl
Journal of Membrane Science, Vol. 511
DOI: 10.1016/j.memsci.2016.03.035

Evaluating different classes of porous materials for carbon capture
journal, January 2014

Huck, Johanna M.; Lin, Li-Chiang; Berger, Adam H.
Energy Environ. Sci., Vol. 7, Issue 12
DOI: 10.1039/C4EE02636E

Result of the 60 tpd CO2 capture pilot plant in European coal power plant with KS-1TM solvent
journal, January 2013

Kamijo, Takashi; Sorimachi, Yoshiki; Shimada, Daisuke
Energy Procedia, Vol. 37
DOI: 10.1016/j.egypro.2013.05.172

Study on heat integration of supercritical coal-fired power plant with post-combustion CO2 capture process through process simulation
journal, October 2015

Liu, Xiaoyan; Chen, Jian; Luo, Xiaobo
Fuel, Vol. 158
DOI: 10.1016/j.fuel.2015.06.033

Role of solvents in CO2 capture processes: The review of selection and design methods
journal, October 2019

N. Borhani, Tohid; Wang, Meihong
Renewable and Sustainable Energy Reviews, Vol. 114
DOI: 10.1016/j.rser.2019.109299

Start-up of World's First Commercial Post-combustion Coal Fired CCS Project: Contribution of Shell Cansolv to SaskPower Boundary Dam ICCS Project
journal, January 2014

Stéphenne, Karl
Energy Procedia, Vol. 63
DOI: 10.1016/j.egypro.2014.11.642

Worldwide innovations in the development of carbon capture technologies and the utilization of CO2
journal, January 2012

Markewitz, Peter; Kuckshinrichs, Wilhelm; Leitner, Walter
Energy & Environmental Science, Vol. 5, Issue 6
DOI: 10.1039/c2ee03403d

Fundamental Understanding of CO ₂ Capture and Regeneration in Aqueous Amines from First-Principles Studies: Recent Progress and Remaining Challenges
journal, June 2017

Stowe, Haley M.; Hwang, Gyeong S.
Industrial & Engineering Chemistry Research, Vol. 56, Issue 24
DOI: 10.1021/acs.iecr.7b00213

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Title: Pilot scale testing of an advanced solvent in a 0.7 MWe post-combustion CO2 capture unit

Abstract

Citation Formats

Process integration and design for maximizing energy efficiency of a coal-fired power plant integrated with amine-based CO2 capture process journal, April 2018

Emerging CO2 capture systems journal, September 2015

Evaluation of different solvent performance in a 0.7 MWe pilot scale CO2 capture unit journal, August 2019

Field Demonstration of Advanced CDRMax Solvent at the US-DOE's National Carbon Capture Centre and the CO2 Technology Centre Mongstad DA, Norway journal, July 2017

Carbon capture by absorption – Path covered and ahead journal, September 2017

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Process intensification for post-combustion CO2 capture with chemical absorption: A critical review journal, November 2015

New Configuration of the CO 2 Capture Process Using Aqueous Monoethanolamine for Coal-Fired Power Plants journal, April 2015

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Fluor's Econamine FG PlusSM Completes Test Program at Uniper's Wilhelmshaven Coal Power Plant journal, July 2017

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Title: Pilot scale testing of an advanced solvent in a 0.7 MWe post-combustion CO₂ capture unit

Process integration and design for maximizing energy efficiency of a coal-fired power plant integrated with amine-based CO2 capture process
journal, April 2018

Emerging CO2 capture systems
journal, September 2015

Evaluation of different solvent performance in a 0.7 MWe pilot scale CO2 capture unit
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Field Demonstration of Advanced CDRMax Solvent at the US-DOE's National Carbon Capture Centre and the CO2 Technology Centre Mongstad DA, Norway
journal, July 2017

Carbon capture by absorption – Path covered and ahead
journal, September 2017

Approaching a reversible stripping process for CO2 capture
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Process intensification for post-combustion CO2 capture with chemical absorption: A critical review
journal, November 2015

New Configuration of the CO ₂ Capture Process Using Aqueous Monoethanolamine for Coal-Fired Power Plants
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Pilot plant study of post-combustion carbon dioxide capture by reactive absorption: Methodology, comparison of different structured packings, and comprehensive results for monoethanolamine
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Process configuration studies of the amine capture process for coal-fired power plants
journal, August 2013

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