当前位置: X-MOL 学术Appl. Energy › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
The case for estimating carbon return on investment (CROI) for CCUS platforms
Applied Energy ( IF 11.2 ) Pub Date : 2021-01-11 , DOI: 10.1016/j.apenergy.2020.116394
Udayan Singh , Lisa M. Colosi

Development of CO2 capture, utilization, and storage (CCUS) platforms has been deemed crucial for achievement of the Paris Agreement goals. Life-cycle assessment (LCA) is an important tool for assessing the efficacy of these technologies in achieving true net-carbon reduction. Critical review of previously published LCA-based evaluations of CCUS technologies reveals that there is an urgent need for more transparent accounting of carbon removal efficiency. Updated methods should incorporate better focus on the CO2 uptake as the primary objective and better differentiate apportionment between “avoided emissions” and true net sequestration. We posit that widespread, uniform application of a standardized ratio metric, carbon return on investment (CROI), will improve the usefulness of LCA to articulate true CO2 sequestration by candidate CCUS platforms. We present two case studies to illustrate the value of this metric for diverse CCS and CCU applications. We also provide several recommendations to make future CROI results as unambiguous as possible and boost their usefulness. These recommendations pertain to conventional LCA concepts, including: choice of functional unit (or declared unit) and system boundaries, application of system expansion, and proper mathematical formulation of the proposed metric. Future work should aim at carrying forward our work on proposed minimum CROI and incorporating the time-value of CO2 fluxes.



中文翻译:

估算CCUS平台的碳投资回报率(CROI)的案例

人们一直认为,CO 2捕集,利用和封存(CCUS)平台的开发对于实现《巴黎协定》的目标至关重要。生命周期评估(LCA)是评估这些技术在实现真正的净碳减少量方面的有效性的重要工具。对以前发布的基于LCA的CCUS技术评估的严格审查显示,迫切需要对碳清除效率进行更透明的核算。更新的方法应更好地关注CO 2以吸收为主要目标,并更好地区分“避免排放量”和真正的净固存之间的分配。我们认为,标准化比率度量,碳投资回报率(CROI)的广泛,统一应用将提高LCA阐明真实CO 2的效用。由候选CCUS平台进行隔离。我们提供了两个案例研究,以说明该指标对各种CCS和CCU应用的价值。我们还提供了一些建议,以使将来的CROI结果尽可能明确,并提高其实用性。这些建议与常规LCA概念有关,包括:功能单元(或声明的单元)和系统边界的选择,系统扩展的应用以及所提议度量的正确数学公式。未来的工作应着眼于在建议的最低CROI方面开展工作,并纳入CO 2通量的时间值。

更新日期:2021-01-11
down
wechat
bug