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| DOI | 10.1016/j.wasman.2024.03.005 |
| Environmental impacts of valorisation of crude glycerol from biodiesel production - A life cycle perspective | |
| 发表日期 | 2024 |
| ISSN | 0956-053X |
| EISSN | 1879-2456 |
| 起始页码 | 179 |
| 卷号 | 179 |
| 英文摘要 | Biodiesel production produces significant quantities of impure crude glycerol as a by-product. Recent increases in the global biodiesel production have led to a surplus of crude glycerol, rendering it a waste. As a result, different methods for its valorisation are currently being investigated. This paper assesses the life cycle environmental impacts of an emerging technology for purification of crude glycerol - a multi-step physico-chemical treatment - in comparison to incineration with energy recovery commonly used for its disposal. For the former, three different acids (H 3 PO 4 , H 2 SO 4 and HCl) are considered for the acidification step in the purification process. The results suggest that the H 2 SO 4 -based treatment is the best option with 17 net-negative impacts out of the 18 categories considered; this is due to system credits for the production of purified glycerol, heat and potassium salts. In comparison to incineration with energy recovery, the H 2 SO 4 -based process has lower savings for the climate change impact (-311 versus -504 kg CO 2 eq./t crude glycerol) but it performs better in ten other categories. Sensitivity analyses suggest that that the impacts of the physico-chemical treatment are highly dependent on crude glycerol composition, allocation of burdens to crude glycerol and credits for glycerol production. For example, treating crude glycerol with lower glycerol content would increase all impacts except climate change and fossil depletion due to the higher consumption of chemicals and lower production of purified glycerol. Considering crude glycerol as a useful product rather than waste and allocating to it burdens from biodiesel production would increase most impacts significantly, including climate change (22 -40 %), while fossil depletion, freshwater and marine eutrophication would become net-positive. The findings of this research will be of interest to the biodiesel industry and other industrial sectors that generate crude glycerol as a by-product. |
| 英文关键词 | Biodiesel; Climate change; Crude glycerol; Glycerol purification; Life cycle assessment; Environmental sustainability |
| 语种 | 英语 |
| WOS研究方向 | Engineering ; Environmental Sciences & Ecology |
| WOS类目 | Engineering, Environmental ; Environmental Sciences |
| WOS记录号 | WOS:001221615600001 |
| 来源期刊 | WASTE MANAGEMENT
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/309452 |
| 作者单位 | University of Manchester |
| 推荐引用方式 GB/T 7714 | . Environmental impacts of valorisation of crude glycerol from biodiesel production - A life cycle perspective[J],2024,179. |
| APA | (2024).Environmental impacts of valorisation of crude glycerol from biodiesel production - A life cycle perspective.WASTE MANAGEMENT,179. |
| MLA | "Environmental impacts of valorisation of crude glycerol from biodiesel production - A life cycle perspective".WASTE MANAGEMENT 179(2024). |
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