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• The densities and pH of partially carbonated aqueous ammonia solutions were measured at 20 °C. • The relation between CO 2 loading of the solution and its pH was derived from chemical equilibrium of the NH 3 -H 2 O-CO 2 system. • Using the fact that the increase in mass is proportional to CO 2 loading, a model derived from the definition of the density. • Presented method for determining CO2 loading using pH and density measurements proved successful on real process samples. The densities and pH of partially carbonated aqueous ammonia solutions were measured at 20 °C. With increasing carbon dioxide loading, increases in density and decreases in pH were observed. These results were used to produce correlations for aqueous ammonia solution loading as a function of ammonia concentration, density, and pH. The correlations are based on first principles to increase predictive capabilities. The predictive capacity of three correlations, having different complexity, was compared. The ensemble of models using both density and pH proved to be superior to correlations based on density or pH separately. [ABSTRACT FROM AUTHOR]

Institute for Chemical Processing of Coal in cooperation with industrial partners: TAURON Polska Energia S.A. and TAURON Wytwarzanie S.A. designed, constructed and operated pilot plant at Łaziska Power Plant in Łaziska Górne, Poland. The carbon capture facility is based on amine post-combustion process technology and used 30 wt% aqueous ethanolamine solvent. Approximately 1000 kilograms of CO 2 can be captured per day from flue gas stream of 200 m 3 /h of a 225MWe hard coal fired boiler. The plant captured its first tonne of CO 2 in August 2013. The purpose of this study is to present initial results from tests carried out at Łaziska Power Plant using different process flow sheets: heat-integrated stripping column and split flow process. The tests provide valuable experimental evidence for modifications described in the literature, mainly through modelling and demonstrate that flow sheet modifications, despite the increase in plant complexity, are worth to consider. [ABSTRACT FROM AUTHOR]

• A study discussing the possibility to reduce the energy efficiency design index for ships through a post-combustion carbon capture process. • Analysis conducted for different ambient scenarios: standard ISO, arctic and tropical. • The study focuses on demonstration to what extent it is possible to use waste heat as a source of energy for the carbon capture process for ships. • The PCC system has a positive impact on the EEDI reduction and CO 2 and SO 2 emission abatement. This paper discusses the possibility to reduce the energy efficiency design index for ships through a post-combustion carbon capture process. The post-combustion carbon capture process, successfully implemented in the electricity generation sector, allows reduction of CO 2 emissions of existing units using fossil fuels with relative simplicity. An assessment of implementing an amine-based carbon capture system onboard of the ship is presented. The analysis covers the energy requirements of the entire system including SO 2 removal, carbon capture and CO 2 compression. Simulations, conducted for different ambient conditions, revealed that the highest CO 2 emission, translating into a reduction of the EEDI, is possible in tropical conditions. The energy efficiency reduction is possible also in arctic conditions to a lesser extent. The post-combustion carbon capture process seems to be a promising technology as the method to reduce the EEDI for ships. An additional advantage is the possibility to retrofit existing constructions as the implementation requires no significant changes in the ship propulsion system. Finally, the nature of the amine-based carbon capture process, aimed to remove acidic exhaust gas components, supports SO 2 emission reduction, making the exhaust gas practically sulfur-free. [ABSTRACT FROM AUTHOR]

• The split flow flow system allowed to achieve low reboiler heat duties in a wide range of column liquid to gas ratio. • For various flow configurations, for systems having interheating, the reboiler heat duties can be reduced. • In the interheated stripper reduces heat losses. • The lowest external condenser cooling stream needed for the split flow was achieved. This paper provides a discussion of the experimental results obtained at the amine-based carbon capture pilot plant having the capacity of 200 m3 n /h of flue gas, using 30 wt% ethanolamine solution as a solvent. The objective was to prove the superiority of application of advanced amine flow systems as well as of the novel stripper internal heater fulfilling pilot Technology Readiness Level. Standard process flow sheet, multi absorber feed and split-flow process modifications with and without stripper interheating were examined. A vast number of process parameters were recorded during the trials. The data were critically analysed, compared and presented in the paper. Demonstrated process flow modifications resulted in a reduction of the reboiler heat duty by about 5%, while using internal stripper interheatingby 9÷11 %, comparing to standard amine-based carbon capture plant. [ABSTRACT FROM AUTHOR]