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Life Cycle Assessment of Nitrogen Circular Economy-Based $NO_{x}$ Treatment Technology
| Content Provider | MDPI |
|---|---|
| Author | Xue, Mianqiang Lin, Bin-Le Tsunemi, Kiyotaka Minami, Kimitaka Nanba, Tetsuya Kawamoto, Tohru |
| Copyright Year | 2021 |
| Description | Humans are significantly perturbing the global nitrogen cycle, leading to excess reactive nitrogen in the environment. Nitrogen oxides as a key reactive nitrogen species are mainly controlled by selective non-catalytic reduction and selective catalytic reduction. Converting nitrogen oxides to ammonia, defined as ReNOx, emerges as an alternative method under a disparate design concept. However, little is known about its overall environmental performance. In this study, we conducted for the first time a life cycle assessment of ReNOx. Compared with the eco-index in the condition of 200 °C with a conversion rate of 95%, it would increase substantially in the condition of 160 °C with a conversion rate of 80% and in the case without a sound $NH_{3}$ treatment. Feedstock format change, adsorption material performance deterioration, and recovery rate decline would increase the eco-index by 8%, 12%, and 18%, respectively. The eco-index was decreased by 31% in the optimized scenario with a renewable energy source and an increased conversion rate. The environmental impacts were compared with traditional methods at impact, damage, and eco-index levels. Finally, the implications on process arrangement in the flue gas system, the externality for power generation, and the contribution to the nitrogen circular economy were examined. The results can serve as a reference for its developers to improve the technology from the environmental perspective. |
| Starting Page | 7826 |
| e-ISSN | 20711050 |
| DOI | 10.3390/su13147826 |
| Journal | Sustainability |
| Issue Number | 14 |
| Volume Number | 13 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2021-07-13 |
| Access Restriction | Open |
| Subject Keyword | Sustainability Environmental Engineering Life Cycle Assessment Nitrogen Oxides Environmental Impact Flue Gas Waste Recovery |
| Content Type | Text |
| Resource Type | Article |
