Showing papers by "Adrian Nur published in 2022"
2 citations
TL;DR: In this paper , the authors used the gravitational observation data of the Topex satellite with an area of 3,891.62 km 2 in the form of Free Air Anomaly (FAA), which was then corrected by bouguers and field correction yields a complete Bouguer Anomaly.
Abstract: − North Maluku, especially Halmahera Island is part of the framework of Indonesia's complex tectonic system and has a high tectonic activity. This area has the meeting zone of the Eurasia plate, the Pacific plate, the Indo-Australian plate and other small plates such as the Philippine plate. As a result of geodynamics, the research area with high seismic activity is due to many geological structures such as anticlines, synclines, upward faults, horizontal faults and normal faults due to plate activity in this area. One of the methods t hat can be used to identify the faults and their types is the gravity method. this study was using the gravitational observation data of the Topex satellite with an area of 3,891.62 km 2 in the form of Free Air Anomaly (FAA), which is then corrected by bouguers and field correction yields a complete Bouguer Anomaly (ABL). Regional and residual anomalies show the good correlation with the geological map of the study area in delineating the distribution of faults with a range of positive anomalies ± 187 mGal and negative anomalies ± -14.8 mGal. Second Vertical Derivatif (SVD) anomaly analysis shows that the distribution of faults in the study area is a type of normal fault.
TL;DR: In this article , a recycle process of NCA cathode scrap from lithium-ion batteries has been carried out, where Nitric acid (HNO3) and hydrogen peroxide (H2O2) were used as leaching agents and reducing agents, respectively.
Abstract: A recycle process of NCA cathode scrap from lithium-ion batteries has been carried out. Nitric acid (HNO3) and hydrogen peroxide (H2O2) were used as leaching agents and reducing agents, respectively. The leaching process was carried out with a 1.5 M nitric acid (HNO3) solution, a solid to liquid ratio (S / L) of 100 g / L and a temperature of 80°C. The reducing agent concentration and the effect of the leaching time were investigated. Sol-gel and sintering processes were aimed to recover NCA material and reuse it for manufacturing lithium-ion batteries. The results showed that the highest leaching efficiency was at a reducing concentration of 3% w / v for 3 hours. Dry samples were characterized using SEM, XRD, and FTIR. Based on SEM results, the surface morphological analysis of recycled NCA cathode scrap was successfully obtained. As obtained NCA XRD patterns were well indexed according to JCPDS Card # 87-1562. The electrochemical performance or charge-discharge capacity measurement was analyzed in an 18650-type cell and graphite was selected as the anode. The specific capacity of the material obtained from this study is 90 mAh / g.