基于质量和功能性能指标的高价值活性炭生产的生命周期评估
Junaid Saleem1, Zubair Khalid Baig Moghal2, Furqan Tahir2
1Division of Sustainable Development, College of Science and Engineering, Hamad Bin Khalifa University, Qatar Foundation, Doha, Qatar. jsaleem@hbku.edu.qa.
Scientific reports
|September 25, 2025
概括
从子中生产活性炭 (AC) 的生命周期评估显示,氧化 (KOH) 路径比氧化 (NaOH) 更可持续. 这种方法为交流制造提供了更低的碳排放和更高的能源效率.
科学领域:
- 环境科学与工程环境科学与工程
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 从生物质生产活性炭 (AC) 提供了环境效益,但合成方法显著影响其生命周期评估 (LCA).
- 现有的LCA通常依赖于不一致的数据,专注于生产指标,忽视基于绩效的指标.
- 子 (CS) 是AC生产的可行的生物质前体,氧化 (KOH) 和氧化 (NaOH) 是常见的激活剂.
研究的目的:
- 通过使用KOH和NaOH激活路径,对从子中产生AC进行比较生命周期评估 (LCA).
- 用基于质量和基于吸附的功能单位来评估环境影响.
- 确定关键的环境热点,并为可持续的交流生产提出缓解策略.
主要方法:
- 生命周期评估 (LCA) 为使用子的概念交流生产设施进行了生命周期评估.
- 对于KOH和NaOH激活途径,对18个指标量化了环境影响,包括净能源和气候变化 (CC).
- 采用了两个功能单位:基于质量 (每公斤AC) 和基于吸附 (每公斤吸附的染料).
主要成果:
- 热解步骤被确定为AC生产中碳排放中最耗能和最大的贡献者.
- 该KOH途径表现出优异的性能,具有更高的吸附能力 (729 g/kg与NaOH的662 g/kg相比),导致5%更高的能源效率和6%更低的碳排放.
- 在这项研究中合成的AC在所有评估指标中在能源使用和碳排放方面表现优于商业AC.
结论:
- 从子中产生AC的KOH激活路径在环境上比NaOH路径更可取.
- 考虑基于吸附的功能单元对于全面了解交流可持续性至关重要.
- 优化生产流程,包括探索替代干燥方法,可以进一步减轻交流制造对环境的影响.
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