Environmental life cycle assessment of combined process for biodiesel and hydrogen production

IF 2.7 4区环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES

Journal of Material Cycles and Waste Management Pub Date : 2025-04-03 DOI:10.1007/s10163-025-02214-7

Nahla Faleh, Khaoula Ben Hnich, Zouhour Khila, Noureddine Hajjaji

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Abstract

The latest global events and the alarming environmental situation has highlighted the urgent need to switch from conventional energy sources to more sustainable bioenergy alternatives. The current study’s goal is to assess the environmental performances of biodiesel and hydrogen production from chicken fat waste. The suggested process is simulated using Aspen plus software, and it consists of the production of both biodiesel and hydrogen through the combination of a transesterification and an auto-thermal reforming processes. Life cycle assessment method is considered to appraise the environmental profile of the overall production chain of 1 GJ of energy output. Results show that to produce 1 GJ of energy, 80.4 kg eq CO₂ is emitted. This finding is highlighted by the important contribution of the chicken farm subsystem in most of the adapted impact categories. Mineral fertilizers’ substitution by chicken litter reduces the environmental impacts of the chicken farm subsystem, in particular global warming potential impact is reduced by 17%. The present investigation reveals the important contribution of the farming subsystem to the environmental performances of an energy production process from fatty waste revealing the strong connection between all the stakeholders in the supply chain of raw materials.

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生物柴油和制氢联合工艺的环境生命周期评估

最近的全球事件和令人震惊的环境状况突出表明，迫切需要从传统能源转向更可持续的生物能源替代品。目前的研究目标是评估生物柴油和鸡脂肪废物制氢的环境性能。使用Aspen plus软件模拟了建议的过程，该过程包括通过酯交换和自动热重整过程的组合生产生物柴油和氢气。采用生命周期评价方法评价1吉焦能量输出的整个生产链的环境概况。结果表明，每产生1gj能量，排放80.4 kg当量CO2。养鸡场子系统在大多数适应影响类别中的重要贡献突出了这一发现。用鸡窝代替矿物肥料减少了养鸡场子系统的环境影响，特别是全球变暖潜在影响降低了17%。本研究揭示了农业子系统对脂肪废物能源生产过程环境绩效的重要贡献，揭示了原材料供应链中所有利益相关者之间的紧密联系。

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来源期刊

Journal of Material Cycles and Waste Management 环境科学-环境科学

CiteScore

5.30

自引率

16.10%

发文量

205

审稿时长

4.8 months

期刊介绍： The Journal of Material Cycles and Waste Management has a twofold focus: research in technical, political, and environmental problems of material cycles and waste management; and information that contributes to the development of an interdisciplinary science of material cycles and waste management. Its aim is to develop solutions and prescriptions for material cycles. The journal publishes original articles, reviews, and invited papers from a wide range of disciplines related to material cycles and waste management. The journal is published in cooperation with the Japan Society of Material Cycles and Waste Management (JSMCWM) and the Korea Society of Waste Management (KSWM).