Abstract
ABSTRACT This study’s main objective was to optimize the design parameters of the hybrid membrane-absorption CO2-capture process in natural gas steam cycle (NGCC) power plants. To calculate the CO2 concentration in the permeating gas and the required area for the separating membrane, a mass transfer model of a membrane for separating CO2, N2 and H2O was developed in Aspen Plus. The effects of the CO2 recovery rate of the membrane, the ratio of the feed gas pressure to the permeating-side gas pressure and the flow rate of the flue gas on the required area for the membrane, the power consumption of the compressor and the heat duty for the solvent regeneration were then analyzed. The optimal feed-gas-to-permeating-side-gas pressure ratio and the flue gas flow rate were found to be 10:1 and 50%, respectively. Furthermore, compared to traditional chemical absorption, the solvent regeneration’s heat duty decreased by more than 20.7% when the gas flow rate and the CO2 recovery rate were 100% and 20%, respectively.
Highlights
OPEN ACCESSReceived: July 3, 2020 Revised: September 3, 2020 Accepted: September 3, 2020Publisher: Taiwan Association for Aerosol Research ISSN: 1680-8584 print ISSN: 2071-1409 onlineCopyright: The Author(s)
Considering the considerable carbon emission of the natural gas steam cycle (NGCC) power plant, CO2 capture in the NGCC power plants will become a significance technical storage from a longerterm perspective, while CO2 concentration of the flue gas in NGCC power plant was about 4 vol% due to high excess air ratio
The chemical absorption process for capturing CO2 is influenced by the CO2 concentration of the permeating gas, the area of the membrane and the power of the compressor
Summary
OPEN ACCESSReceived: July 3, 2020 Revised: September 3, 2020 Accepted: September 3, 2020Publisher: Taiwan Association for Aerosol Research ISSN: 1680-8584 print ISSN: 2071-1409 onlineCopyright: The Author(s). Utilization and storage (CCUS) technologies was mainly applied in the coalfired field due to the carbon emission of coal-fired power plant was over twice for NGCC (natural gas steam cycle) power plants (Yu et al, 2012). For an NGCC power plant with capacity of approximately 390–1600 MWe, the carbon emissions from the flue gas was approximately 190–600 kg MW–1 (MartinGamboa et al, 2018). Considering the considerable carbon emission of the NGCC power plant, CO2 capture in the NGCC power plants will become a significance technical storage from a longerterm perspective, while CO2 concentration of the flue gas in NGCC power plant was about 4 vol% due to high excess air ratio
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
