In-situ and Ex-situ Conversion of Coal to Methane using Hydrogen. Indian Journal of Energy and Energy Resources (IJEER), [S. l.], v. 4, n. 3, p. 1–5, 2025. DOI: 10.54105/ijeer.C1044.04030525. Disponível em: https://www.journals.latticescipub.com/index.php/ijeer/article/view/974.. Acesso em: 7 jun. 2025.