气候变化领域集成服务门户(CCPortal): Can BECCS deliver sustainable and resource efficient negative emissions?

CCPortal

DOI	10.1039/c7ee00465f
	Can BECCS deliver sustainable and resource efficient negative emissions?
	Fajardy M.; Mac Dowell N.
发表日期	2017
ISSN	17545692
起始页码	1389
结束页码	1426
卷号	10 期号:6
英文摘要	Negative emissions technologies (NETs) in general and bioenergy with CO2 capture and storage (BECCS) in particular are commonly regarded as vital yet controversial to meeting our climate goals. In this contribution we present a whole-systems analysis of the BECCS value chain associated with cultivation, harvesting, transport and conversion in dedicated biomass power stations in conjunction with CCS, of a range of biomass resources-both dedicated energy crops (miscanthus, switchgrass, short rotation coppice willow), and agricultural residues (wheat straw). We explicitly consider the implications of sourcing the biomass from different regions, climates and land types. The water, carbon and energy footprints of each value chain were calculated, and their impact on the overall system water, carbon and power efficiencies was evaluated. An extensive literature review was performed and a statistical analysis of the available data is presented. In order to describe the dynamic greenhouse gas balance of such a system, a yearly accounting of the emissions was performed over the lifetime of a BECCS facility, and the carbon "breakeven time" and lifetime net CO2 removal from the atmosphere were determined. The effects of direct and indirect land use change were included, and were found to be a key determinant of the viability of a BECCS project. Overall we conclude that, depending on the conditions of its deployment, BECCS could lead to both carbon positive and negative results. The total quantity of CO2 removed from the atmosphere over the project lifetime and the carbon breakeven time were observed to be highly case specific. This has profound implications for the policy frameworks required to incentivise and regulate the widespread deployment of BECCS technology. The results of a sensitivity analysis on the model combined with the investigation of alternate supply chain scenarios elucidated key levers to improve the sustainability of BECCS: (1) measuring and limiting the impacts of direct and indirect land use change, (2) using carbon neutral power and organic fertilizer, (3) minimising biomass transport, and prioritising sea over road transport, (4) maximising the use of carbon negative fuels, and (5) exploiting alternative biomass processing options, e.g., natural drying or torrefaction. A key conclusion is that, regardless of the biomass and region studied, the sustainability of BECCS relies heavily on intelligent management of the supply chain. © The Royal Society of Chemistry 2017.
英文关键词	Agricultural wastes; Agriculture; Carbon dioxide; Crops; Cultivation; Digital storage; Fertilizers; Gas emissions; Greenhouse gases; Land use; Sensitivity analysis; Supply chains; Sustainable development; Systems analysis; Biomass processing; Biomass transports; Greenhouse gas balance; Indirect land-use changes; Intelligent management; Organic fertilizers; Resource-efficient; Short rotation coppice; Biomass; bioenergy; biomass power; carbon footprint; coppice; crop residue; greenhouse gas; land use change; literature review; road transport; sensitivity analysis; statistical analysis; sustainability; Miscanthus; Panicum virgatum; Salix; Triticum aestivum
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/190471
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.. Can BECCS deliver sustainable and resource efficient negative emissions?[J],2017,10(6).
APA	Fajardy M.,&Mac Dowell N..(2017).Can BECCS deliver sustainable and resource efficient negative emissions?.Energy & Environmental Science,10(6).
MLA	Fajardy M.,et al."Can BECCS deliver sustainable and resource efficient negative emissions?".Energy & Environmental Science 10.6(2017).