High pressure solvent/vacuum swing adsorption hybrid capture system for gas turbine power plants

Tristan Lambert, Jai Kant Pandit, Clare Anderson, Gongkui Xiao, Paul Webley, Andrew Hoadley

Research output: Chapter in Book/Conference paperConference paper

Abstract

With the increasing awareness towards global carbon dioxide (CO2) emissions, carbon capture and storage (CCS) has been proposed as part of the solution to reduce the effect of climate change. To help bring about CCS a high-pressure (>30bar) solvent absorption/vacuum swing adsorption (VSA) hybrid capture system has been developed to reduce the energy penalty associated with the post combustion carbon capture of a Natural Gas Combined Cycle (NGCC). The system uses VSA system to create a CO2 rich stream which is recirculated around to the inlet air to the gas turbine. The compressed gases are then sent to a solvent capture system to recover the CO2. The CO2 free gas is used to combust the fuel in the GT combustor and expanded to generate power. The solvent used in this study is a 30wt% K2CO3 solvent chosen for its stability at high temperatures. The high pressure gas increases the partial pressure of CO2 enhancing the driving force for mass transfer. Using multi-objective optimisation, the VSA and solvent capture conditions were optimised at different capture rates. At a capture rate of 75% the VSA/solvent hybrid is able to reduce the energy penalty by 3.6% points from 10.5% for the base case solvent system to 6.9%.

Original languageEnglish
Title of host publication27th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems, ECOS 2014
EditorsRon Zevenhoven
PublisherAabo Akademi University
Pages1249-1258
Number of pages10
ISBN (Electronic)9781634391344
Publication statusPublished - 2014
Event27th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems, ECOS 2014 - Turku, Finland
Duration: 15 Jun 201419 Jun 2014

Publication series

Name27th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems, ECOS 2014
Volume2014-June

Conference

Conference27th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems, ECOS 2014
CountryFinland
CityTurku
Period15/06/1419/06/14

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