https://nova.newcastle.edu.au/vital/access/ /manager/Index en-au 5 Amino acids/NH₃ mixtures for CO₂ capture: effect of neutralization methods on CO₂ mass transfer and NH₃ vapour loss https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:18618 Wed 11 Apr 2018 13:02:04 AEST ]]> Kinetics of the reversible reaction of CO2(aq) with taurate in aqueous solution https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:37763 Tue 13 Apr 2021 15:48:53 AEST ]]> An SO2 tolerant process for CO2 capture https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:18737 Sat 24 Mar 2018 08:02:48 AEDT ]]> Potassium sarcosinate promoted aqueous ammonia solution for post-combustion capture of CO₂ https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:20414 G) describing CO₂ absorption and NH₃ vapor loss in 3.0M NH₃ and blended 3.0M NH₃ solutions containing a wide range of K-SAR concentrations from 0.0 to 3.0M were determined using a wetted-wall column contactor at 15–25 °C and CO₂ loadings from 0.0 to 0.5(molCO₂/mol total amine). Additionally, prediction of equilibrium species distribution using fundamental chemical modelling software (ReactLab) in CO₂-loaded NH₃ containing blended solutions were used to explain our experimental results. Addition of K-SAR resulted in significant improvement of KG of CO₂ absorption in NH₃ solutions, but also increased NH₃ vapor losses. The effect of temperature on KG of CO₂ absorption in K-SAR solution was greater than in the NH₃/K-SAR blended solution. The improvement in mass transfer upon addition of K-SAR is due to the faster reaction of CO₂ with K-SAR than with NH₃. The greater loss of NH₃ upon addition of K-SAR can be ascribed to the availability of more free NH₃ and the decrease of solubility of CO₂ and NH₃ in the NH₃/K-SAR blended solution. The investigation of KG of CO₂ and NH₃ vapor losses in NH₃ and other amines (PZ, 1-MPZ, DEA and MEA) blended solutions also proved the competition for CO₂ is one of the reasons for the increasing of NH₃ vapor losses.]]> Sat 24 Mar 2018 08:00:52 AEDT ]]> Protonation constants and thermodynamic properties of amino acid salts for CO₂ capture at high temperatures https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:19303 m) and entropies (ΔS⁰m) of the protonation reactions were also determined by the van't Hoff equation. It was found that sarcosine can maintain a higher pKₐ than the other amino acids studied at high temperatures. We also found that the CO₂ solubilities and overall mass-transfer coefficients of 5 m' sarcosinate (moles of sarcosine per kilogram of solution) at 333-353 K are higher than those of 30% MEA at 313-353 K. These results show that some possible benefits can be produced from the use of sarcosine as a fast solvent for CO₂ absorption at high temperatures. However, the pronotation reaction of sarcosine is the least exothermic among those of all amino acids studied. This could lead to a high regeneration energy consumption in the sarcosinate-based CO2 capture process.]]> Sat 24 Mar 2018 07:49:59 AEDT ]]>