ExperimentalStudy on the Novel Direct Steam StrippingProcess for Postcombustion CO2Capture.

Highenergy consumption is a crucial issue for the regenerationof solvent for postcombustion CO2capture by chemical absorption.Primary modeling results show the potential to reduce the energy consumptionthrough a novel solvent regeneration process by direct steam stripping.This work is an extension of our previous exploration and aims tovalidate the direct steam stripping process by experimental studieson a lab-scale stripping platform. We investigated the direct steamstripping and the conventional stripping mode in terms of energy consumptionand steam condensation. The results showed, for the direct steam strippingmode, the optimum energy consumption at 1 atm was 2.98 MJ/kg CO2, 23.2% lower than that of the conventional stripping mode.Higher solvent feeding temperature and carrier steam superheatingtemperature were beneficial to reduce steam condensation in the column.We found 96–99.5 °C feeding solvent temperature was suitableconsidering both the energy consumption and steam condensation. Besides,we proposed an improved direct steam stripping process using carriergases such as hydrocarbon, which could further reduce the latent heatrequired. [ABSTRACT FROM AUTHOR]