Techno-Economic Analysis and Life Cycle Assessment of Hydroxylamine Eco-Manufacturing via Wastewater Electrochemical Reduction
Techno-Economic Analysis and Life Cycle Assessment of Hydroxylamine Eco-Manufacturing via Wastewater Electrochemical Reduction
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DOI：
10.1021/acssuschemeng.3c03336
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发表时间：
2023-09
期刊：
影响因子：
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通讯作者：
Manish Mosalpuri;Wenzhen Li;Mark Mba Wright
中科院分区：
文献类型：
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作者：
Manish Mosalpuri;Wenzhen Li;Mark Mba Wright
人们越来越需要开发新技术，以降低废水中的活性氮浓度，并减少我们对生产氮基化学品和肥料所需的化石燃料能源的依赖。本研究进行了技术经济分析（TEA）和生命周期评估（LCA）的电化学转化硝酸根离子（NO3-）存在于废水中的羟胺（NH 2 OH），一个有价值的化学中间体。我们采用实验数据和建模假设，以确定NH 2 OH生产成本和生命周期排放的小规模设施（生产1500公斤NH 2 OH/天）和大型设施（生产50,000公斤NH 2 OH/天）集成到污水处理厂。目前小型和大型设施的NH 2 OH生产成本估计分别为6.14美元/kg-NH 2 OH和5.37美元/kg-NH 2 OH。决定电化学反应器成本的参数是电解质、分离和固定成本，它们的值为$1.48、$0.96和$0.53/kg。未来的成本降低预测表明，随着敏感性分析参数的改进，目前小型和大型设施的NH 2 OH生产成本可以分别降低到2.79美元/kg-NH 2 OH和2.06美元/kg-NH 2 OH（NH 2 OH市场价格= 1.72美元/kg）。LCA结果表明，所提出的电化学途径产生NH 2 OH具有较低的生命周期影响比传统的途径。
There is a growing need to develop novel technologies that reduce reactive nitrogen concentrations in wastewater streams and decrease our reliance on fossil fuel energy required to produce N-based chemicals and fertilizers. This study conducts a techno-economic analysis (TEA) and a life cycle assessment (LCA) of the electrochemical conversion of nitrate ions (NO3–) present in wastewater to hydroxylamine (NH2OH), a valuable chemical intermediate. We employ experimental data and modeling assumptions to determine NH2OH production costs and life cycle emissions for a small-scale facility (producing 1500 kg-NH2OH/day) and a large-scale facility (producing 50,000 kg-NH2OH/day) integrated into a wastewater treatment plant. The present NH2OH production costs for the small- and large-scale facilities are estimated at $6.14/kg-NH2OH and $5.37/kg-NH2OH, respectively. The parameters dominating the electrochemical reactor cost are electrolyte, separations, and fixed cost, with their values as $1.48, $0.96, and $0.53/kg. Future cost reduction projections indicate that the present NH2OH production costs for the small- and large-scale facilities can be reduced to $2.79/kg-NH2OH and $2.06/kg-NH2OH (NH2OH market price = $1.72/kg), respectively, with improvements in the sensitivity analysis parameters. LCA results indicate that the proposed electrochemical pathway to produce NH2OH has lower life cycle impacts than the conventional pathway.