Carbon dioxide capture by absorption, challenges and possibilities

Svendsen, Hallvard F.; Hessen, Erik T.; Mejdell, Thor

doi:10.1016/j.cej.2011.01.014

Cited by 169 publications

(90 citation statements)

References 20 publications

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“…Typical concentration levels range between 12% and 14% for coal-fired boilers and integrated gasification combined cycles (IGCC), 11-13% for oil-fired boilers, 3-4% for gas turbines, and 7-10% for natural gas fired boilers [2]. It has been widely shown that cost-effective mitigation of CO 2 emissions from these electricity-generating sources can be accomplished by carbon capture and storage (CCS) [3][4][5][6][7][8][9][10] The separation of CO 2 from post-combustion flue gas can be conducted by various approaches, including physical/chemical absorption [11][12][13][14][15][16][17][18][19][20][21], adsorption [22][23][24][25][26][27][28][29][30][31], membrane separation [32][33][34][35][36][37][38][39][40][41][42][43][44], and cryogenic distillation [45][46][47]…”

Section: Introductionmentioning

confidence: 99%

Hydrodynamics and mass transfer performance of a microreactor for enhanced gas separation processes

Ganapathy

Shooshtari

Dessiatoun

et al. 2015

Chemical Engineering Journal

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Section: Introductionmentioning

confidence: 99%

Hydrodynamics and mass transfer performance of a microreactor for enhanced gas separation processes

Ganapathy

Shooshtari

Dessiatoun

et al. 2015

Chemical Engineering Journal

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“…For tertiary amines the energy requirement for stripping of CO2 can be lower than for secondary and primary amines because of lower heat of reaction, but may have a lower equilibrium temperature sensitivity increasing the demand for stripping steam, see (Svendsen et al 2011) and the absorption rate is also normally significant lower. An ideal amine system combines high absorption rate and cyclic capacity with low energy requirement for stripping and low degradation and corrosions.…”

Section: Introductionmentioning

confidence: 99%

Extensive dataset for oxidative degradation of ethanolamine at 55–75°C and oxygen concentrations from 6 to 98%

Vevelstad

Johansen

Knuutila

et al. 2016

International Journal of Greenhouse Gas Control

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Post combustion CO2 capture using amines as chemical absorbents is a relatively mature technology. Rate of reaction and desorption energy demand are normally prime criteria for evaluation of new solvents while degradation and corrosion studies are often postponed. However, degradation and corrosion are in many cases showstoppers and should be considered at an early stage. In this work, a systematic study has been conducted on oxidative degradation of 30 wt% ethanolamine (MEA) for oxygen concentrations: 6, 21, 49 and 98% and temperatures: 55, 65 and 75 °C. The formation of ten primary degradation compounds (acids, ammonia and alkyl amines) and seven secondary degradation compounds (HEGly, OZD, HEPO, HEF, HEA, HEI and BHEOX was monitored as function of time over a period of 3 -6 weeks. The full comprehensive data set is available in the supplementary information for development of models describing the degradation behavior. Suggested mechanisms for formation of seven secondary degradation compounds; HEGly, HEPO, OZD, HEF, HEA, BHEOX and HEI from literature were compiled and discussed in view of the experimental results to suggest pathways which are more likely than others.The rate of MEA degradation increases with increasing temperature and oxygen concentration. The overall nitrogen balances were closed within 83-97%; the higher deviations observed at the highest temperature, 75 o C. HEF, HEI and ammonia were the degradation compounds that most significantly contributed to the nitrogen balance in most experiments. However, at 6% O2 content, HEGly was the major nitrogen containing degradation compound identified. Formate was found to be the major anionic compound in all experiments.HEGly formation was found to be independent on O2 partial pressure, but this may not be true for the further reaction of HEGly. The results suggests OZD formation to be oxygen dependent. However, only one mechanism is so far suggested for an oxygen dependent pathway. Both OZD and HEPO concentrations increase with oxygen concentration. Separate laboratory experiments at constant temperature (55-75 o C) do not capture the HEPO formation seen in pilot plant samples indicating that higher temperatures and/or temperature cycles are necessary.The results clearly show that performing accelerated degradation tests with 98% oxygen cannot easily be extrapolated to what happens at 6% oxygen, and therefore may not be representative for the situation in an industrial plant both with regard to rates of formation and products formed.

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“…At the operational level, Svendsen et al (2011) have identified two main drawbacks regarding post-combustion CO 2 capture. First, the high energy requirement for regenerating the amine solvent leads to a decrease by about 30 % of the plant efficiency.…”

Section: Introductionmentioning

confidence: 99%

Assessment of Solvent Degradation within a Global Process Model of Post-Combustion CO2 Capture

Léonard

Toye

Heyen

2014

Computer Aided Chemical Engineering

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Solvent degradation may be a major drawback for the large-scale implementation of post-combustion CO 2 capture due to amine consumption and emission of degradation products. However, its influence on the process operations has rarely been studied. In the present work, a kinetics model describing solvent oxidative and thermal degradation has been developed based on own experimental results for the benchmark solvent, i.e. 30 wt% monoethanolamine (MEA) in water. This model has been included into a global Aspen Plus model of the CO 2 capture process. The selected process modelling approaches are described in the present work. Using the resulting simulation model, optimal operating conditions can be identified to minimize both the energy requirement and the solvent degradation in the process. This kind of process model assessing solvent degradation may contribute to the design of large-scale CO 2 capture plants to consider not only the process energy penalty, but also its environmental penalty. Indeed, both aspects are relevant for the large-scale deployment of the CO 2 capture technology.

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Carbon dioxide capture by absorption, challenges and possibilities

Cited by 169 publications

References 20 publications

Hydrodynamics and mass transfer performance of a microreactor for enhanced gas separation processes

Hydrodynamics and mass transfer performance of a microreactor for enhanced gas separation processes

Extensive dataset for oxidative degradation of ethanolamine at 55–75°C and oxygen concentrations from 6 to 98%

Assessment of Solvent Degradation within a Global Process Model of Post-Combustion CO2 Capture

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