The environmental impact of post-combustion CO2 capture with MEA, with aqueous ammonia, and with an aqueous ammonia-ethanol mixture for a coal-fired power plant

Strube, Rune; Pellegrini, G.; Manfrida, Giampaolo

doi:10.1016/j.energy.2010.12.060

Cited by 58 publications

(22 citation statements)

References 12 publications

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“…Thus, an approach that does not achieve the recycling of ammonia in a closed loop is not a feasible solution and will lead to a perpetual downward spiral of energy inefficiency and wasted resources. In addition, the necessary reduction of ammonia emissions leads to further energy requirements, and solvent production as well as the remaining ammonia losses to the environment have a more significant environmental impact than CO 2 removal with MEA [50]. Some technical issues should be also resolved to ensure economic viability, such as: suppression of ammonia vaporization, heat integration, minimization of absorbent flow rate, and bicarbonate-prevalent operation [17].…”

Section: Alternative Solvents For Co 2 Capturementioning

confidence: 98%

“…In this aspect, a large quantity of CO 2 is produced during the Haber-Bosch process. The production of MEA is more energy intensive than the production of ammonia but the much higher necessary ammonia makeup leads to higher energy requirements for solvent production in the ammonia capture processes [50]. Producing fertilizers is not a real solution either.…”

Section: Alternative Solvents For Co 2 Capturementioning

confidence: 99%

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Use of monoethanolamine (MEA) for CO 2 capture in a global scenario: Consequences and alternatives

2016

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a b s t r a c t a r t i c l e i n f o Available online xxxx Keywords: CO 2 absorption MEA Amines Global demand Alternative solvents Alternative technologiesRecent research on CO 2 capture is focusing on the optimization of CO 2 absorption using amines (mainly monoethanolamine-MEA) in order to minimize the energy consumption of this very energy-intensive process and improve the absorption efficiency. Process optimization is always required and this research is worth and necessary. However, the main concern arises when thinking of the overall process: solvent production, solvent use and regeneration, and environmental effects related to its use/emissions. The production of MEA from ammonia involves important CO 2 emissions during the Haber-Bosch process. The regeneration of the solvent after the absorption is also an indirect source of CO 2 related to the use of fuels (i.e., combustion processes for energy supply). Thus, the evaluation of the overall balance of CO 2 emitted and captured is essential to determine the efficiency of the process. In addition, other environmental impacts associated to the toxicity and environmental fate of the solvent have to be considered. The use of MEA and other amines in CO 2 capture is a point of concern and a global application does not seem to be the best strategy. This review aims at giving an overview of the main implications of using MEA as absorption solvent for CO 2 capture together with the last advances in research to improve the conventional absorption process. Furthermore, alternatives of using other solvents and/or using other technology and their advantages and weak points will be briefly provided. An approach oriented to produce CO 2 -based products with economic value that can be reintegrated in a closed carbon loop, reducing the use of fresh materials and decreasing the production cost, should be the final objective of current research on CO 2 capture.

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Section: Alternative Solvents For Co 2 Capturementioning

confidence: 98%

Section: Alternative Solvents For Co 2 Capturementioning

confidence: 99%

Use of monoethanolamine (MEA) for CO 2 capture in a global scenario: Consequences and alternatives

2016

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“…On the other hand, oxy-fuel combustion is still in the demonstration phase. The technology has been built and operated at a pilot plant scale and further development is required before the technology is ready for the design and construction of a full-scale system [12][13][14]. While post-combustion capture is considered practical, it requires large-scale equipment for the CO 2 removal and consumes process heat which leads to additional exhaust-gas pressure losses, causing the thermal efficiency to be significantly reduced [2,15].…”

Section: Carbon Capturementioning

confidence: 99%

Pressure Swing Adsorption Technologies for Carbon Dioxide Capture

Wiheeb

Helwani

Kim

et al. 2015

Separation & Purification Reviews

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The principles of pressure swing adsorption (PSA) for carbon dioxide capture are reviewed.Previous work on PSA, relevant modeling and experimental investigation for specifically carbon dioxide separation are also presented and significant findings highlighted. Simple rules for PSA process design based on analysis of the inherent properties of adsorbate-adsorbent systems encompassing equilibrium isotherm, adsorption kinetics, shape of breakthrough curves, screening and selection of adsorbent, bed porosity, adsorption time, purge to feed ratio, residence Downloaded by [University of Sussex Library] at 07:46 17 August 2015A c c e p t e d M a n u s c r i p t 2 time, pressure equalization and rinse steps are provided to promote better understanding of the technology so that it gains wider acceptance in the future to address the global environmental concern, particularly in the removal of carbon dioxide as a greenhouse gas.

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“…On the other hand, the reduction and reforming of CO 2 into useful energy source such as CH 4 , CO or other hydrocarbons has recently attracted a great research attention due to the global warming issue [7,8]. Among various techniques for CO 2 capture [9,10], storage [11], and utilization [12,13], the combination of CO 2 absorption by mono-ethanolamine (MEA) and CO 2 utilization by photocatalysis is a potential technology [14].…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic reduction of NO2 and CO2 using molybdenum-doped titania nanotubes

Huy

Bai

2015

Chemical Engineering Journal

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The environmental impact of post-combustion CO2 capture with MEA, with aqueous ammonia, and with an aqueous ammonia-ethanol mixture for a coal-fired power plant

Cited by 58 publications

References 12 publications

Use of monoethanolamine (MEA) for CO 2 capture in a global scenario: Consequences and alternatives

Use of monoethanolamine (MEA) for CO 2 capture in a global scenario: Consequences and alternatives

Pressure Swing Adsorption Technologies for Carbon Dioxide Capture

Photocatalytic reduction of NO2 and CO2 using molybdenum-doped titania nanotubes

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