Investigation of the suitability of aqueous sodium glycinate as a solvent for post combustion carbon dioxide capture on the basis of pilot plant studies and screening methods

Optimization in the Absorption and Desorption of CO2 Using Sodium Glycinate Solution

“…The thermal data used here includes the heat capacity, heat of absorption, and latent heat, which have been reported in the literature, as shown in Table 2. In here, ∆H abs is heat of absorption, which is related to loading α and temperature [22,29]. In addition, C p is the heat capacity of the solvent, ∆T is the temperature difference, m sol is the mass of regeneration solvent, ∆m CO 2 is the mass loss of CO 2 after stripping.…”

“…Therefore, the studies using amino acid salt as an absorbent have been noted by scholars. In order to improve on the drawback of alkanolamines, including their oxidative degredation and high vapor pressure resulting in solvent loss and degradation product handling, many alternative solvents have been tested [3,[6][7][8][9][10][11][18][19][20][21][22], in which amino acid salts are found to be more attractive solvents. This is because amino acid salt solutions have a better resistance to degradation, have a negligible volatility, and no environmental issue [23].…”

Practical experience in post-combustion CO2 capture using reactive solvents in large pilot and demonstration plants

“…With more than 4000 h in operation by March 2011, the PostCap process was claimed to reach 90% CO 2 capture rate with low energy consumption, nearly zero solvent loss and high stability (with less than 1% degradation). A more recent work has reported a pilot scale test of aqueous sodium glycinate (NaGly) for CO 2 capture ability from real power plant flue gases extracted from EVN Dürnrohr coal based power plant in Austria (Rabensteiner et al, 2014). An absorber and desorber of respective heights of 12 and 8 m (as shown in Fig.…”

“…By varying test parameters including NaGly concentration, flue gas flow rate, liquid to gas ratio, desorber pressure, and absorber height, NaGly used 40% energy requirement higher than that of a typical 30 wt% MEA tested for comparison. As pointed out by Rabensteiner et al (2014), this is an indication that energy consumption will be one of the areas where amino acid based absorption process might have to improve in order to compete with the amine based technology. On the other hand, Sanchez-Fernandez et al (2014) have reported on simulation work done by The Netherlands' TNO, as well as TU Delft and the UK's Process Monkey for the use of potassium taurate based precipitating amino acid salts processes called DECAP and DECAP plus in terms of energy requirement saving within the CO 2 removal unit.…”

“…A pilot scale test of aqueous sodium glycinate (NaGly) for CO2 capture ability from real power plant flue gases extracted from EVN Dürnrohr coal based power plant in Austria(Rabensteiner et al, 2014).…”