Department of Mechanical & Automobile Engineering, Christ University, Bangalore 560029, India.
Department of Chemistry, Don Bosco Institute of Technology, Mysore Road, Bangalore 560074, India.
Molecules. 2022 Apr 29;27(9):2845. doi: 10.3390/molecules27092845.
Pollution and global warming are a few of the many reasons for environmental problems, due to industrial wastes and greenhouse gases, hence there are efforts to bring down such emissions to reduce pollution and combat global warming. In the present study, zinc oxide nanoparticles are green synthesized using cow dung as fuel, through combustion. Synthesized material was characterized by FTIR, XRD, UV, and FESEM. The as-prepared ZnO-GS NPs were employed as a transesterification catalyst for the preparation of biodiesel from discarded cooking oil. The biodiesel obtained is termed D-COME (discarded cooking oil methyl ester), which is blended with 20% commercial diesel (B20). Additionally, this blend, i.e., B20, is further blended with varying amounts of as-prepared ZnO-GS NPs, in order to ascertain its effects on the quality of emissions of various greenhouse gases such as hydrocarbons, CO, NO. Moreover, the brake thermal efficiency (BTHE) and brake specific fuel consumption (BSFC) were studied for their blends. The blend (B20) with 30 mg of ZnO-GS, i.e., B20-30, displays the best performance and reduced emissions. Comparative studies revealed that the ZnO-GS NPs are as efficient as the ZnO-C NPs, indicating that the green synthetic approach employed does not affect the efficiency of the ZnO NPs.
污染和全球变暖是造成环境问题的众多原因之一，这主要是由于工业废物和温室气体的排放。因此，人们正在努力减少这些排放，以减轻污染和应对全球变暖。在本研究中，使用牛粪作为燃料，通过燃烧法绿色合成了氧化锌纳米粒子。采用 FTIR、XRD、UV 和 FESEM 对合成材料进行了表征。所制备的 ZnO-GS NPs 被用作酯交换催化剂，用于从废弃食用油中制备生物柴油。所得的生物柴油称为 D-COME（废弃食用油甲酯），与 20%的商业柴油（B20）混合。此外，这种混合物，即 B20，进一步与不同量的预先制备的 ZnO-GS NPs 混合，以确定其对各种温室气体排放质量的影响，如碳氢化合物、CO 和 NO。此外，还研究了它们的混合物的制动热效率（BTHE）和制动比油耗（BSFC）。添加 30mg ZnO-GS 的混合物（B20-30）表现出最佳性能和更低的排放量。对比研究表明，ZnO-GS NPs 的效率与 ZnO-C NPs 相当，这表明所采用的绿色合成方法不会影响 ZnO NPs 的效率。
