Pilot-scale CO2 capture in a cement plant with CESAR1: Leveraging absorber intercooling and cold-feed heat-integration to lower the SRD

Isaac Appelquist Løge; Can Demir; Sai Hema Bhavya Vinjarapu; Randi Neerup; Ebbe Hauge Jensen; Jens Kristian Jørsboe; Maria Dimitriadi; Halil Halilov; Carsten Fritzner Frøstrup; Istvan Gyorbiro; Nomiki Kottaki; Asams Nelliparambil Jayan; Søren Jensen; Jakob Lindkvist Karlsson; Philip Loldrup Fosbøl

doi:10.1016/j.cej.2025.169153

Pilot-scale CO₂ capture in a cement plant with CESAR1: Leveraging absorber intercooling and cold-feed heat-integration to lower the SRD

Isaac Appelquist Løge^*, Can Demir, Sai Hema Bhavya Vinjarapu, Randi Neerup, Ebbe Hauge Jensen, Jens Kristian Jørsboe, Maria Dimitriadi, Halil Halilov, Carsten Fritzner Frøstrup, Istvan Gyorbiro, Nomiki Kottaki, Asams Nelliparambil Jayan, Søren Jensen, Jakob Lindkvist Karlsson, Philip Loldrup Fosbøl

^*Corresponding author for this work

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Abstract

Reducing energy consumption within CO₂capture, and managing energy flow within the capture process remain challenges. This work presents a pilot-scale experimental campaign of amine-based CO₂ capture from cement flue gas using the CESAR1 solvent, focusing on two heat-integration strategies: absoarber intercooling and cold-feed. In addition, we present a composite-curve analysis of available heat, illustrating how the CO₂ capture unit can be integrated with external heat integration. When using intercooling (IC), the performance of the absorber improved. The specific reboiler duty (SRD) decreased from 3.39GJ/tCO₂ (baseline) to 3.10GJ/tCO₂ , corresponding to an energy reduction of 8.6%. Implementing a cold-feed (CF) bypass around the lean-rich heat exchanger (LRHX) did not reduce the SRD, but it lowered top-column temperatures and shifted cooling duty from the overhead condenser to the lean cooler, supporting improved solvent stability and more direct control of cooling demand. Combining intercooling and cold-feed enabled decoupled control of lean and rich solvent loadings, and achieved an SRD of 2.50GJ/tCO₂ at approximately 70% capture, or an energy reduction of 26.3%.

Original language	English
Article number	169153
Journal	Chemical Engineering Journal
Volume	524
Number of pages	17
ISSN	1369-703X
DOIs	https://doi.org/10.1016/j.cej.2025.169153
Publication status	Published - 2025

Keywords

CO capture
CESAR1
Advanced configurations
Pilot-scale

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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Løge, I. A., Demir, C., Vinjarapu, S. H. B., Neerup, R., Jensen, E. H., Jørsboe, J. K., Dimitriadi, M., Halilov, H., Frøstrup, C. F., Gyorbiro, I., Kottaki, N., Jayan, A. N., Jensen, S., Karlsson, J. L., & Fosbøl, P. L. (2025). Pilot-scale CO₂ capture in a cement plant with CESAR1: Leveraging absorber intercooling and cold-feed heat-integration to lower the SRD. Chemical Engineering Journal, 524, Article 169153. https://doi.org/10.1016/j.cej.2025.169153

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title = "Pilot-scale CO2 capture in a cement plant with CESAR1: Leveraging absorber intercooling and cold-feed heat-integration to lower the SRD",

abstract = "Reducing energy consumption within CO2 capture, and managing energy flow within the capture process remain challenges. This work presents a pilot-scale experimental campaign of amine-based CO2 capture from cement flue gas using the CESAR1 solvent, focusing on two heat-integration strategies: absoarber intercooling and cold-feed. In addition, we present a composite-curve analysis of available heat, illustrating how the CO2 capture unit can be integrated with external heat integration. When using intercooling (IC), the performance of the absorber improved. The specific reboiler duty (SRD) decreased from 3.39GJ/tCO2 (baseline) to 3.10GJ/tCO2 , corresponding to an energy reduction of 8.6\%. Implementing a cold-feed (CF) bypass around the lean-rich heat exchanger (LRHX) did not reduce the SRD, but it lowered top-column temperatures and shifted cooling duty from the overhead condenser to the lean cooler, supporting improved solvent stability and more direct control of cooling demand. Combining intercooling and cold-feed enabled decoupled control of lean and rich solvent loadings, and achieved an SRD of 2.50GJ/tCO2 at approximately 70\% capture, or an energy reduction of 26.3\%.",

keywords = "CO capture, CESAR1, Advanced configurations, Pilot-scale",

author = "L{\o}ge, \{Isaac Appelquist\} and Can Demir and Vinjarapu, \{Sai Hema Bhavya\} and Randi Neerup and Jensen, \{Ebbe Hauge\} and J{\o}rsboe, \{Jens Kristian\} and Maria Dimitriadi and Halil Halilov and Fr{\o}strup, \{Carsten Fritzner\} and Istvan Gyorbiro and Nomiki Kottaki and Jayan, \{Asams Nelliparambil\} and S{\o}ren Jensen and Karlsson, \{Jakob Lindkvist\} and Fosb{\o}l, \{Philip Loldrup\}",

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doi = "10.1016/j.cej.2025.169153",

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Løge, IA , Demir, C , Vinjarapu, SHB , Neerup, R, Jensen, EH, Jørsboe, JK, Dimitriadi, M, Halilov, H, Frøstrup, CF, Gyorbiro, I, Kottaki, N, Jayan, AN, Jensen, S, Karlsson, JL & Fosbøl, PL 2025, 'Pilot-scale CO₂ capture in a cement plant with CESAR1: Leveraging absorber intercooling and cold-feed heat-integration to lower the SRD', Chemical Engineering Journal, vol. 524, 169153. https://doi.org/10.1016/j.cej.2025.169153

TY - JOUR

T1 - Pilot-scale CO2 capture in a cement plant with CESAR1: Leveraging absorber intercooling and cold-feed heat-integration to lower the SRD

AU - Løge, Isaac Appelquist

AU - Demir, Can

AU - Vinjarapu, Sai Hema Bhavya

AU - Neerup, Randi

AU - Jensen, Ebbe Hauge

AU - Jørsboe, Jens Kristian

AU - Dimitriadi, Maria

AU - Halilov, Halil

AU - Frøstrup, Carsten Fritzner

AU - Gyorbiro, Istvan

AU - Kottaki, Nomiki

AU - Jayan, Asams Nelliparambil

AU - Jensen, Søren

AU - Karlsson, Jakob Lindkvist

AU - Fosbøl, Philip Loldrup

PY - 2025

Y1 - 2025

N2 - Reducing energy consumption within CO2 capture, and managing energy flow within the capture process remain challenges. This work presents a pilot-scale experimental campaign of amine-based CO2 capture from cement flue gas using the CESAR1 solvent, focusing on two heat-integration strategies: absoarber intercooling and cold-feed. In addition, we present a composite-curve analysis of available heat, illustrating how the CO2 capture unit can be integrated with external heat integration. When using intercooling (IC), the performance of the absorber improved. The specific reboiler duty (SRD) decreased from 3.39GJ/tCO2 (baseline) to 3.10GJ/tCO2 , corresponding to an energy reduction of 8.6%. Implementing a cold-feed (CF) bypass around the lean-rich heat exchanger (LRHX) did not reduce the SRD, but it lowered top-column temperatures and shifted cooling duty from the overhead condenser to the lean cooler, supporting improved solvent stability and more direct control of cooling demand. Combining intercooling and cold-feed enabled decoupled control of lean and rich solvent loadings, and achieved an SRD of 2.50GJ/tCO2 at approximately 70% capture, or an energy reduction of 26.3%.

AB - Reducing energy consumption within CO2 capture, and managing energy flow within the capture process remain challenges. This work presents a pilot-scale experimental campaign of amine-based CO2 capture from cement flue gas using the CESAR1 solvent, focusing on two heat-integration strategies: absoarber intercooling and cold-feed. In addition, we present a composite-curve analysis of available heat, illustrating how the CO2 capture unit can be integrated with external heat integration. When using intercooling (IC), the performance of the absorber improved. The specific reboiler duty (SRD) decreased from 3.39GJ/tCO2 (baseline) to 3.10GJ/tCO2 , corresponding to an energy reduction of 8.6%. Implementing a cold-feed (CF) bypass around the lean-rich heat exchanger (LRHX) did not reduce the SRD, but it lowered top-column temperatures and shifted cooling duty from the overhead condenser to the lean cooler, supporting improved solvent stability and more direct control of cooling demand. Combining intercooling and cold-feed enabled decoupled control of lean and rich solvent loadings, and achieved an SRD of 2.50GJ/tCO2 at approximately 70% capture, or an energy reduction of 26.3%.

KW - CO capture

KW - CESAR1

KW - Advanced configurations

KW - Pilot-scale

U2 - 10.1016/j.cej.2025.169153

DO - 10.1016/j.cej.2025.169153

M3 - Journal article

SN - 1369-703X

VL - 524

JO - Chemical Engineering Journal

JF - Chemical Engineering Journal

M1 - 169153

ER -