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Comparison between conventional solvothermal and aqueous solution-based production of UiO-66-NH2: Life cycle assessment, techno-economic assessment, and implications for CO2 capture and storage

生命周期评估 环境科学 水溶液 工艺工程 胺气处理 生产(经济) 碳足迹 废物管理 化学 计算机科学 温室气体 环境工程 工程类 有机化学 宏观经济学 经济 生物 生态学
作者
Hongxi Luo,Fangwei Cheng,Luke Huelsenbeck,Natalie Smith
出处
期刊:Journal of environmental chemical engineering [Elsevier]
卷期号:9 (2): 105159-105159 被引量:48
标识
DOI:10.1016/j.jece.2021.105159
摘要

Metal-organic frameworks (MOFs) are a new class of materials that has shown great potential in catalysis, sensing, separations, and carbon capture and storage. Conventionally, MOFs are synthesized at lab-scale using organic solvent-based systems, leading to high environmental burdens and high operating costs, which ultimately hinders the large-scale production and application of MOFs. Aqueous synthesis of MOFs overcomes such difficulty by eliminating the organic solvent, which makes it an environmental-friendlier and economically-favorable alternative to the current production method. However, further quantitative analysis is required to compare the environmental and economic performances of the two methods. Here, we used life cycle assessment (LCA) coupled with techno-economic analysis (TEA) to evaluate the environmental and economic performances of different UiO-66-NH2 production methods. When the solvothermal method was replaced by the aqueous solution-based method, the LCA and TEA results suggest the environmental burdens and cost of UiO-66-NH2 production were reduced by up to 91% and 84%, respectively. By using aqueous solution-based method, the cradle to gate carbon footprint, and production cost of UiO-66-NH2 were estimated to be 43 kg CO2 eq/kg, and $15.8/kg, respectively. We further applied our LCA results to reassess the role of UiO-66-NH2 in carbon capture and storage (CCS) and compare its environmental performance with current benchmark (amine-based solvent). Our results show that electricity produced from UiO-66-NH2 CCS system could potentially have better environmental performance (lower Global Warming Potential (GWP)) than that of the amine-based CCS system if the sorbent loss is less than 0.0017 tonne/tonne CO2 captured. This work is the first comprehensive LCA-TEA study that quantifies the substantial environmental and economic benefits of using the aqueous solution-based systems to produce UiO-66-NH2, and the analysis in this work is intended to be a starting point for further systematic studies on the full life-cycle impacts of MOFs.
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