Solubility of CO2 in 15, 30, 45 and 60 mass% MEA from 40 to 120 °C and model representation using the extended UNIQUAC framework

Aronu, Ugochukwu E.; Gondal, Shahla; Hessen, Erik T.; Haug–Warberg, Tore; Hartono, Ardi; Hoff, Karl Anders; Svendsen, Hallvard F.

doi:10.1016/j.ces.2011.08.042

Cited by 248 publications

(157 citation statements)

References 38 publications

Supporting

Mentioning

126

Contrasting

Order By: Relevance

“…The results obtained in the two works are generally comparable, especially in the low loading range. However, the representation of the free CO 2 is significantly better in the work of Aronu et al (2011) as compared to that of Hessen et al (2010) in the high loading range, where few experimental data are available.…”

Section: The Impact Of Henry's Constant and The N 2 O Analogymentioning

confidence: 94%

“…Hessen et al (2010) and Aronu et al (2011) present studies on the MEA-water-CO 2 system in which VLE data are included in the parameter fitting procedure, and speciation data are used for validating the models predictions. Aronu et al (2011) have included physical CO 2 solubility data, obtained through the use of the N 2 O analogy, in the parameter fitting procedure. The results obtained in the two works are generally comparable, especially in the low loading range.…”

Section: The Impact Of Henry's Constant and The N 2 O Analogymentioning

confidence: 99%

See 1 more Smart Citation

The N 2 O analogy in the CO 2 capture context: Literature review and thermodynamic modelling considerations

Monteiro

Svendsen

2015

Chemical Engineering Science

Self Cite

View full text Add to dashboard Cite

Section: The Impact Of Henry's Constant and The N 2 O Analogymentioning

confidence: 94%

Section: The Impact Of Henry's Constant and The N 2 O Analogymentioning

confidence: 99%

The N 2 O analogy in the CO 2 capture context: Literature review and thermodynamic modelling considerations

Monteiro

Svendsen

2015

Chemical Engineering Science

Self Cite

View full text Add to dashboard Cite

“…6). The capacity of 30 wt% Na 2 CO 3 at equilibrium with flue gas with 0.1 bar CO 2 partial pressure allowing for the precipitation of NaHCO 3 (s) calculated to be 0.10 g CO 2 per gram solvent, as determined by Pitzer's equations and GWB Software (see Supplementary Methods) 27 , the same as MEA 28 . On the basis of previous analysis, the working capacity of sodium carbonate solution is slightly higher than MEA (7.1 versus 6.9% g per gram) 29,30 , but the values depend on process conditions.…”

Section: Resultsmentioning

confidence: 99%

Encapsulated liquid sorbents for carbon dioxide capture

et al. 2015

View full text Add to dashboard Cite

“…However, the water vapor pressure in the reactor is significant and in Table 2 the actual oxygen and water vapor pressures in the reactor are given for all experiments. The calculations are based on the e-NRTL model, see (Hessen et al 2010, Aronu et al 2011). In the figures and tables the nominal feed dry oxygen levels are used.…”

Section: Set-up and Analytical Methodologymentioning

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

Self Cite

View full text Add to dashboard Cite

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.

show abstract

Solubility of CO2 in 15, 30, 45 and 60 mass% MEA from 40 to 120 °C and model representation using the extended UNIQUAC framework

Cited by 248 publications

References 38 publications

The N 2 O analogy in the CO 2 capture context: Literature review and thermodynamic modelling considerations

The N 2 O analogy in the CO 2 capture context: Literature review and thermodynamic modelling considerations

Encapsulated liquid sorbents for carbon dioxide capture

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

Contact Info

Product

Resources

About