Economics at your fingertips  

Making gas‐CCS a commercial reality: The challenges of scaling up

Maria Elena Diego, Muhammad Akram, Jean‐Michel Bellas, Karen N. Finney and Mohamed Pourkashanian

Greenhouse Gases: Science and Technology, 2017, vol. 7, issue 5, 778-801

Abstract: Significant reductions in CO 2 emissions are required to limit the global temperature rise to 2°C. Carbon capture and storage (CCS) is a key enabling technology that can be applied to power generation and industrial processes to lower their carbon intensity. There are, however, several challenges that such a method of decarbonization poses when used in the context of natural gas (gas‐CCS), especially for solvent‐based (predominantly amines) post‐combustion capture. These are related to: (i) the low CO 2 partial pressure of the exhaust gases from gas‐fired power plants (∼3‐4%vol. CO 2 ), which substantially limits the driving force for the capture process; (ii) their high O 2 concentration (∼12‐13%vol. O 2 ), which can degrade the capture media via oxidative solvent degradation; and (iii) their high volumetric flow rates, which means large capture plants are needed. Such post‐combustion gas‐CCS features unavoidably lead to increased CO 2 capture costs. This perspective aims to summarize the key technologies used to overcome these as a priority, including supplementary firing, humidified systems, exhaust gas recirculation and selective exhaust gas recirculation. These focus on the maximum CO 2 levels achievable for each, as well as the electrical efficiencies attainable when the capture penalty is taken into account. Oxy‐turbine cycles are also discussed as an alternative to post‐combustion gas‐CCS, indicating the main advantages and limitations of these systems together with the expected electrical efficiencies. Furthermore, we consider the challenges for scaling‐up and deployment of these technologies at a commercial level to enable gas‐CCS to play a crucial role in a low‐carbon future. © 2017 The Authors. Greenhouse Gases: Science and Technology published by Society of Chemical Industry and John Wiley & Sons, Ltd.

Date: 2017
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2) Track citations by RSS feed

Downloads: (external link)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link:

Access Statistics for this article

More articles in Greenhouse Gases: Science and Technology from Blackwell Publishing
Bibliographic data for series maintained by Wiley Content Delivery ().

Page updated 2020-03-21
Handle: RePEc:wly:greenh:v:7:y:2017:i:5:p:778-801