Research Article
Life Cycle Assessment of Painting Process: A Case for Eco-friendly Automobile Production
Wang Sicheng*
,
Liu Sumin,
Qiu Jiajun,
Wang Daran
Issue:
Volume 14, Issue 2, April 2025
Pages:
42-52
Received:
16 March 2025
Accepted:
14 April 2025
Published:
14 May 2025
Abstract: The life cycle assessment (LCA) method was introduced and applied to automotive painting process, SimaPro 9.5 software with the Swiss Ecoinvent 3 Database and the United States Life Cycle Inventory Database (USLCI), as well as ReCiPe 2016 Midpoint (H) model were used to quantitatively evaluate the impact on ecological environment of the use of materials, resources and energy as well as generated emissions and wastes through four important midpoint impact categories: climate change, ecotoxicity, human toxicity, and fossil resource scarcity, to track important environmental footprints including carbon footprint during the whole production activities of automotive painting process. In the end, the results and sensitivity analysis of the LCA research were conducted, conclusions and recommendations were given, which provided a practical industrial case for eco-friendly automobile production. Results of this study show that within the automotive painting production process, energy consumption and its resulting emissions have more significant impacts on climate change, fossil resource scarcity and human toxicity; Material consumption and its resultant emissions and wastes have a notable impact on ecotoxicity. Among the main processes and units of automotive painting production, the topcoat process has the most significant impact on all four impact categories, utility power as well as pre-treatment and electrophoresis processes follow closely. Additionally, the sealant application process exhibits a relatively significant impact on ecotoxicity. Furthermore, if the electricity used in the automotive painting production process is entirely sourced from photovoltaic power generation, compared with traditional grid power supply, the impacts on climate change, fossil resource scarcity and human toxicity would be lower, whereas the impact on ecotoxicity would be more significant.
Abstract: The life cycle assessment (LCA) method was introduced and applied to automotive painting process, SimaPro 9.5 software with the Swiss Ecoinvent 3 Database and the United States Life Cycle Inventory Database (USLCI), as well as ReCiPe 2016 Midpoint (H) model were used to quantitatively evaluate the impact on ecological environment of the use of mate...
Show More
Research Article
First Principles Assessment of Electronic and Magnetic Properties of Fe and Ni Doped ZnO for Spintronic Applications
Issue:
Volume 14, Issue 2, April 2025
Pages:
53-59
Received:
2 February 2025
Accepted:
17 February 2025
Published:
29 May 2025
DOI:
10.11648/j.ijmsa.20251402.12
Downloads:
Views:
Abstract: Presence of room temperature ferromagnetism (RTFM) is essential for the generation of new class of materials that have magnetic as well as semiconducting properties known as diluted magnetic semiconductors (DMSs). A 3d Transition metals (TMs) doping on DMSs improve their electrical, thermal and magnetic properties and also enhance their potentiality for the generation of emerging spintronic devices. Electronic and magnetic behaviors of, Fe and Ni doped ZnO were investigated using the density functional theory (DFT) with generalized gradient approximation and Hubbard on-site corrections (GGA+U). The results illustrated that pure and doped systems of ZnO have a direct bandgap. The calculated bandgap of pure ZnO is in agreement with the experimental findings while a decrease in bandgap found is due to the doping of Fe and Ni on ZnO, respectively. Total density of state (TDOS) plot illustrates that pure ZnO is diamagnetic, while Ferromagnetism was observed due to doping effect of Fe and Ni on ZnO. Results from Partial density of states (PDOS) shows that the asymmetric behavior of spin up and spin down on the d-electrons of Fe on ZnO are more compared to that of Ni on ZnO. Making it more promising candidate for spintronic applications.
Abstract: Presence of room temperature ferromagnetism (RTFM) is essential for the generation of new class of materials that have magnetic as well as semiconducting properties known as diluted magnetic semiconductors (DMSs). A 3d Transition metals (TMs) doping on DMSs improve their electrical, thermal and magnetic properties and also enhance their potentialit...
Show More
