Study of the Post-combustion CO2 Capture Applied to Conventional and Partial Oxy-fuel Cement Plants

Dubois, Lionel; Laribi, Sinda; Mouhoubi, Seloua; Weireld, Guy De; Thomas, Diane

doi:10.1016/j.egypro.2017.03.1756

Cited by 23 publications

(15 citation statements)

References 19 publications

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“…The concentration of CO 2 in the flue gas from conventional cement kilns is ∼25% (48). For chemical absorption with amines, the most technologically mature postcombustion capture method for a combined stream (37,38), increasing the concentration of CO 2 up to 60% has been shown to decrease heat requirements, solvent regeneration energy, and steam costs of capture (49)(50)(51)(52)(53). The gas stream from our decarbonation cell is higher still (67%), which should make amine scrubbing more efficient.…”

Section: Discussionmentioning

confidence: 99%

Toward electrochemical synthesis of cement—An electrolyzer-based process for decarbonating CaCO ₃ while producing useful gas streams

Ellis

Badel

Chiang

et al. 2019

Proc. Natl. Acad. Sci. U.S.A.

178

133

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Cement production is currently the largest single industrial emitter of CO2, accounting for ∼8% (2.8 Gtons/y) of global CO2emissions. Deep decarbonization of cement manufacturing will require remediation of both the CO2emissions due to the decomposition of CaCO3to CaO and that due to combustion of fossil fuels (primarily coal) in calcining (∼900 °C) and sintering (∼1,450 °C). Here, we demonstrate an electrochemical process that uses neutral water electrolysis to produce a pH gradient in which CaCO3is decarbonated at low pH and Ca(OH)2is precipitated at high pH, concurrently producing a high-purity O2/CO2gas mixture (1:2 molar ratio at stoichiometric operation) at the anode and H2at the cathode. We show that the solid Ca(OH)2product readily decomposes and reacts with SiO2to form alite, the majority cementitious phase in Portland cement. Electrochemical calcination produces concentrated gas streams from which CO2may be readily separated and sequestered, H2and/or O2may be used to generate electric power via fuel cells or combustors, O2may be used as a component of oxyfuel in the cement kiln to improve efficiency and lower CO2emissions, or the output gases may be used for other value-added processes such as liquid fuel production. Analysis shows that if the hydrogen produced by the reactor were combusted to heat the high-temperature kiln, the electrochemical cement process could be powered solely by renewable electricity.

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Section: Discussionmentioning

confidence: 99%

Toward electrochemical synthesis of cement—An electrolyzer-based process for decarbonating CaCO ₃ while producing useful gas streams

Ellis

Badel

Chiang

et al. 2019

Proc. Natl. Acad. Sci. U.S.A.

178

133

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“…A dimensionless group relationship of mass transfer coefficient is expanded and assessed. It was found that tendency notably effected the flow templates and the heat transfer coefficients (Dubois et al, 2017).…”

Section: Resultsmentioning

confidence: 99%

Measurement of Gas-Phase Mass Transfer Coefficients in a Humidification Column through Random Packing

Khorasani¹,

Zivdar²,

Tabrizi³

et al. 2019

American Journal of Engineering and Applied Sciences

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Packed columns are an important part of the broad selection of mass and heat transfer equipment. Nowadays, the use of packed columns is increasing, which is because of its lower pressure drop, higher capacity and higher mass transfer in comparison to tray columns. The experiential tests and the hypothetical analysis display that the chemical dehumidification of air by hygroscopic salt solutions confirms the stable reduction in humidity ratio, which is appropriate for uses to air conditioning or drying processes The mass transfer factors in the pulse were found to correspond nearly to the factors that would be achieved in the distributed bubble flow regime In the present study, parameters that affect column performance, such as, fluid retention and gas-phase mass transfer coefficient in a humidification column using random packing in towers with 0.1 m and 0.2 m diameters and 1m height, were measured Air velocity was 1.32 to 3.92 m 3 per hour and liquid velocity was 10 to 70 m 3 per hour. In this research, the Nakajima model was used to calculate the effective area. Thereafter, experimental values for gas-phase mass transfer coefficients were compared to Zech, Shi, Grouff, Shulman, Billet and Ondamodels The mean relative errors of these models with the present study's experimental findings were 7%, 15%, 29%, 21%, 45% and 195%. Findings showed that by decreasing the column diameter, the gas-phase mass transfer coefficient (K g .ae) also increases Further, the obtained retention values showed that retention in the column with a 0.1 m diameter was higher than the column with a 0.2 m column.

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“…As a previous step, a screening of solvents has been realized to select the best ones based on their absorption performances [5]. Tab.…”

Section: A Solvents Tested and Methodologymentioning

confidence: 99%

Post-combustion CO₂ capture process applied to flue gases with high CO₂ contents: Micro-pilot experiments and simulations

Laribi

Dubois

Weireld

et al. 2017

2017 International Conference on ENERGY and ENVIRONMENT (CIEM)

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In the context of Carbon Capture and Utilization (CCU), the present article focuses on the investigation, for the cement industry of the post-combustion CO2 capture using amine solvents applied to the conventional combustion and to an innovative type of combustion called O2-enriched air combustion. After a previous screening, the solvents selected were tested at micro-pilot scale in an absorption-regeneration device in order to determine their absorption performances and respective regeneration energies. Simple and activated solvents were tested in such conditions, such as primary and secondary alkanolamines and compared to the conventional solvent Monoethanolamine 30 wt.% (benchmark), both in conventional and high CO2 contents conditions. As the experimental data, Aspen Hysys TM simulations of the micro-pilot unit proved that the solvents regeneration energies decrease for an increased CO2 concentration in the gas to treat, which is the main advantage of the post-combustion CO2 capture applied to partial oxy-fuel combustion.

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Study of the Post-combustion CO2 Capture Applied to Conventional and Partial Oxy-fuel Cement Plants

Cited by 23 publications

References 19 publications

Toward electrochemical synthesis of cement—An electrolyzer-based process for decarbonating CaCO ₃ while producing useful gas streams

Toward electrochemical synthesis of cement—An electrolyzer-based process for decarbonating CaCO ₃ while producing useful gas streams

Measurement of Gas-Phase Mass Transfer Coefficients in a Humidification Column through Random Packing

Post-combustion CO₂ capture process applied to flue gases with high CO₂ contents: Micro-pilot experiments and simulations

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Study of the Post-combustion CO2 Capture Applied to Conventional and Partial Oxy-fuel Cement Plants

Cited by 23 publications

References 19 publications

Toward electrochemical synthesis of cement—An electrolyzer-based process for decarbonating CaCO 3 while producing useful gas streams

Toward electrochemical synthesis of cement—An electrolyzer-based process for decarbonating CaCO 3 while producing useful gas streams

Measurement of Gas-Phase Mass Transfer Coefficients in a Humidification Column through Random Packing

Post-combustion CO2 capture process applied to flue gases with high CO2 contents: Micro-pilot experiments and simulations

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Toward electrochemical synthesis of cement—An electrolyzer-based process for decarbonating CaCO ₃ while producing useful gas streams

Toward electrochemical synthesis of cement—An electrolyzer-based process for decarbonating CaCO ₃ while producing useful gas streams

Post-combustion CO₂ capture process applied to flue gases with high CO₂ contents: Micro-pilot experiments and simulations