Yuliusman, Y., Kamilia, A. K., Utomo, A. N., & Nasruddin, N. (2026). Use of activated carbon from NiO modified Polyethylene Terephthalate plastic bottle waste to optimize natural gas storage in Adsorbed Natural Gas (ANG) technology. SINERGI, 30(1), 239–246. https://doi.org/10.22441/sinergi.2026.1.022