Cyclic performance evaluation of a polyethylenimine/silica adsorbent with steam regeneration using simulated NGCC flue gas and actual flue gas of a gas-fired boiler in a bubbling fluidized bed reactor

Zhang, Wenbin; Sun, Chenggong; Snape, Colin E.; Sun, Xuezhong; Liu, Hao

Abstract

To accelerate the deployment of Carbon Capture and Storage (CCS) based on the solid amine adsorbents towards a practical scale application relevant to Natural Gas Combined Cycle (NGCC) power plants, this study has evaluated the cyclic performance of a polyethylenimine/silica adsorbent of kg scale in a laboratory scale bubbling fluidized bed reactor. A high volumetric concentration 80−90 vol% of steam mixed with N2 and CO2 has been used as the stripping gas during a typical temperature swing adsorption (TSA) cycle. Both the simulated NGCC flue gas and the actual flue gas from a domestic gas boiler have been used as the feed gas of the CO2 capture tests with the solid adsorbent. Various characterization has been carried out to elucidate the possible reasons for the initial capacity decline under the steam regeneration conditions. The effect of presence of CO2 in the stripping gas has also been studied by comparing the working capacities using different regeneration strategies. It has been demonstrated that the breakthrough and equilibrium CO2 adsorption capacities can be stabilized at approximately 5.9 wt% and 8.6 wt%, respectively, using steam regeneration for both the simulated and actual natural gas boiler flue gases. However, using a concentration of 15 vol% CO2 in the stripping gas has resulted in a significantly low working capacity at a level of 1.5 wt%, most likely due to the incomplete CO

Citation

Zhang, W., Sun, C., Snape, C. E., Sun, X., & Liu, H. (2020). Cyclic performance evaluation of a polyethylenimine/silica adsorbent with steam regeneration using simulated NGCC flue gas and actual flue gas of a gas-fired boiler in a bubbling fluidized bed reactor. International Journal of Greenhouse Gas Control, 95, Article 102975. https://doi.org/10.1016/j.ijggc.2020.102975

• Journal Article Type: Article
• Acceptance Date: Jan 19, 2020
• Online Publication Date: Feb 4, 2020
• Publication Date: 2020-04
• Deposit Date: Feb 4, 2020
• Publicly Available Date: Feb 10, 2020
• Journal: International Journal of Greenhouse Gas Control
• Print ISSN: 1750-5836
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 95
• Article Number: 102975
• DOI: https://doi.org/10.1016/j.ijggc.2020.102975
• Keywords: General Energy; Industrial and Manufacturing Engineering; Pollution; Management, Monitoring, Policy and Law
• Public URL: https://nottingham-repository.worktribe.com/output/3880184
• Publisher URL: https://www.sciencedirect.com/science/article/pii/S1750583618306789
• Additional Information: This article is maintained by: Elsevier; Article Title: Cyclic performance evaluation of a polyethylenimine/silica adsorbent with steam regeneration using simulated NGCC flue gas and actual flue gas of a gas-fired boiler in a bubbling fluidized bed reactor; Journal Title: International Journal of Greenhouse Gas Control; CrossRef DOI link to publisher maintained version: https://doi.org/10.1016/j.ijggc.2020.102975; Content Type: article; Copyright: © 2020 The Authors. Published by Elsevier Ltd.