低碳循环经济中废物转化为液体燃料途径的可持续性指标评估

IF 8 Q1 ENERGY & FUELS Energy nexus Pub Date : 2023-12-01 DOI:10.1016/j.nexus.2023.100254
Rakesh Narayana Sarma, Ravikrishnan Vinu
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引用次数: 0

摘要

固体废物管理问题和能源危机的关系要求利用木质纤维素生物质农业残留物和城市固体废物进行燃料和能源生产。热化学技术,如热解、水热液化和气化,是从生物质中生产生物油、生物原油和合成气的有前途的选择,可以进一步催化升级为碳氢化合物燃料。虽然与这些过程及其衍生产品相关的技术优点,但是从系统级别对过程进行可持续性分析对于评估其商业可行性是必要的。这篇观点文章介绍了基于质量和能量的不同可持续性指标的基本理解、重要性和分析。介绍了生物质和废物的显著特性,以及由它们衍生的各种燃料的特性。根据能源回收/效率、e因子、过程质量强度和二氧化碳足迹等关键指标,对这三种技术进行了评估。不同工艺的e因子有如下趋势:水热液化(0.14)≈气化(0.13)<热解(0.5)。然而,从分析中可以清楚地看出,HTL工艺的e因子和温室气体排放可以通过对含有机物的水相进行活化和将生物原油升级为碳氢化合物来进一步降低。HTL工艺是一种有前途的与原料无关的途径。从可持续性的角度介绍和评估了过程技术经济学的关键结果。本研究建议在热化学转化的研究工作中使用简单的可持续性指标,以便在一个共同的可持续性平台上比较不同研究的结果。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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An assessment of sustainability metrics for waste-to-liquid fuel pathways for a low carbon circular economy

The nexus of solid waste management problems and energy crisis necessitates the utilization of lignocellulosic biomass agro residues and municipal solid wastes for fuel and energy generation. Thermochemical technologies like pyrolysis, hydrothermal liquefaction and gasification are promising options to produce bio-oil, bio-crude and syngas from biomass, which can be further catalytically upgraded to hydrocarbon fuels. While there are technical merits associated with these processes and the products derived from them, the sustainability analysis of the processes from a systems level is imperative to evaluate their commercial viability. This perspective article presents fundamental understanding, importance and analysis of the different sustainability metrics based on mass and energy. The salient properties of biomass and wastes, and that of various fuels derived from them are presented. The three technologies are evaluated based on key metrics such as energy recovery/efficiency, E-factor, process mass intensity and CO2 footprint. The E-factor for different technologies follows the trend: hydrothermal liquefaction (0.14) ≈ gasification (0.13) < pyrolysis (0.5). However, it is clear from the analysis that the E-factor and GHG emissions of the HTL process, a promising feedstock-agnostic pathway, can be further reduced by valorizing the organic-laden aqueous phase and upgrading the bio-crude to hydrocarbons. The key results of process technoeconomics are presented and assessed from a sustainability viewpoint. This study recommends the use of simple sustainability metrics in research works on thermochemical conversion so that the results from different studies can be compared on a common sustainability platform.

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来源期刊
Energy nexus
Energy nexus Energy (General), Ecological Modelling, Renewable Energy, Sustainability and the Environment, Water Science and Technology, Agricultural and Biological Sciences (General)
CiteScore
7.70
自引率
0.00%
发文量
0
审稿时长
109 days
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