气候变化领域集成服务门户(CCPortal): The energy return on investment of BECCS: Is BECCS a threat to energy security?

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DOI	10.1039/c7ee03610h
	The energy return on investment of BECCS: Is BECCS a threat to energy security?
	Fajardy M.; Mac Dowell N.
发表日期	2018
ISSN	17545692
起始页码	1581
结束页码	1594
卷号	11 期号:6
英文摘要	Compliance with long term climate targets whilst maintaining energy security is understood to rely heavily on the large-scale deployment of negative emissions technologies (NETs). One option, Bioenergy with Carbon Capture and Storage (BECCS), is prominent in Integrated Assessment Models (IAMs), with projected annual contributions of 8-16.5 GtCO2 per year of atmospheric carbon dioxide removal whilst contributing 150-300 EJ per year, or 14 to 20% of global primary energy supply, in 2100. Implicit in these scenarios is the assumption that BECCS is a net producer of energy. However, relatively energy intensive biomass supply chains and low power generation efficiency could challenge this ubiquitous assumption. Deploying an energy negative technology at this scale could thus represent a threat to energy security. In this contribution, we evaluate the energy return on investment (EROI) of an archetypal BECCS facility. In order to highlight the importance of biomass sourcing, two feedstock scenarios are considered: use of domestic biomass pellets (UK) and import of biomass pellets from Louisiana, USA. We use the Modelling and Optimisation of Negative Emissions Technologies (MONET) framework to explicitly account for growing, pre-treating, transporting and converting the feedstock in a 500 MW BECCS facility. As an example, we illustrate how the net electricity balance (NElB) of a UK-based BECCS facility can be either positive or negative, as a function of supply chain decisions. Power plant efficiency, fuel efficiency for transport, transport distance, moisture content, drying method, as well as yield were identified as key factors that need to be carefully managed to maximise BECCS net electricity balance. A key insight of this contribution is that, given an annual carbon removal target, increasing BECCS' power generation efficiency by using a more advanced biomass conversion and CO2 capture technology could improve BECCS net electricity balance, but at the cost of increasing the amount of BECCS capacity required to meet this target. BECCS optimal deployment pathway is thus heavily dependent on which service provided by BECCS is most valued: carbon dioxide removal or power generation. © 2018 The Royal Society of Chemistry.
英文关键词	Atmospheric chemistry; Bioconversion; Biomass; Carbon capture; Carbon dioxide; Climate change; Energy security; Feedstocks; Pelletizing; Profitability; Supply chains; Atmospheric carbon dioxide; Carbon dioxide removal; Energy return on investments; Integrated assessment models; Large-scale deployment; Modelling and optimisation; Power generation efficiency; Power plant efficiency; Investments; biomass; carbon dioxide; electricity supply; energy; energy efficiency; investment; model; power generation; security threat; supply chain management; technological change; Louisiana; United States
语种	英语
来源期刊	Energy & Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/190230
作者单位	Centre for Environmental Policy, Imperial College London, Exhibition Road, London, SW7 1NA, United Kingdom; Centre for Process Systems Engineering, Imperial College London, Exhibition Road, London, SW7 2AZ, United Kingdom
推荐引用方式 GB/T 7714	Fajardy M.,Mac Dowell N.. The energy return on investment of BECCS: Is BECCS a threat to energy security?[J],2018,11(6).
APA	Fajardy M.,&Mac Dowell N..(2018).The energy return on investment of BECCS: Is BECCS a threat to energy security?.Energy & Environmental Science,11(6).
MLA	Fajardy M.,et al."The energy return on investment of BECCS: Is BECCS a threat to energy security?".Energy & Environmental Science 11.6(2018).