International Science Community Association International Research Journal of Environmental Sciences 2319-1414 9 4 2020 10 22 Study on equilibrium conditions of methane gas hydrates 80 90 EN K.M. Harishma 1 Division of Forest Botany, Kerala Forest Research Institute, Peechi 680 653, Kerala, India S. Sandeep 2 Division of Forest Botany, Kerala Forest Research Institute, Peechi 680 653, Kerala, India V.B. Sreekumar 3 Division of Soil Science, Kerala Forest Research Institute, Peechi 680 653, Kerala, India Gwambene Brown 1 Marian University College, Bagamoyo, Tanzania Opiyo Stephen Balaka 1 Department of Natural Resources and Environmental Sciences, Faculty of Agriculture and Natural Resources Management, Kisii University, P.O Box 408-40200, Kisii, Kenya Osunbitan J.A. 1 Department of Agricultural and Environmental Engineering, Obafemi Awolowo University, Ile-Ife, Nigeria Akinyele O.A. 2 Department of Agricultural and Bio-Environmental Engineering, Federal College of Agriculture, Ibadan, Nigeria Chandanshive Navnath E. 1 Fergusson College, Pune, Maharashtra, India Khandagale Tushar 2 Fergusson College, Pune, Maharashtra, India Burade Dimpal 3 Fergusson College, Pune, Maharashtra, India Wandre Sayali 4 Fergusson College, Pune, Maharashtra, India Shinde Prajakta 5 Fergusson College, Pune, Maharashtra, India C.I. Akagha 1 Department of Chemistry, Federal University of Technology Owerri, Nigeria A.U. Nkwoada 2 Department of Chemistry, Federal University of Technology Owerri, Nigeria C.F. Nnadozie 3 Department of Chemistry, Federal University of Technology Owerri, Nigeria Ahirwar J. R. 1 Department of Botany, Amar Shaheed Chandrashekhar Azad, Govt. P.G. College Niwari M.P, India . Salahuddin 1 PDM University, Bahadurgarh, Haryana, India CHOUTI Waris Kéwouyèmi 1 Laboratory of Inorganic Chemistry and Environment (LACIE), Faculty of Science and Technology (FAST), University of Abomey-Calavi, BP: 4521 Cotonou Benin HOUNKANRIN Francois 2 Laboratory of Applied Hydrology (LHA), National Institute of Water (INE), University of Abomey-Calavi, 01 BP: 526 Cotonou Benin ADANDEDJI Firmin M. 3 Laboratory of Applied Hydrology (LHA), National Institute of Water (INE), University of Abomey-Calavi, 01 BP: 526 Cotonou Benin MAMA Daouda 4 Laboratory of Applied Hydrology (LHA), National Institute of Water (INE), University of Abomey-Calavi, 01 BP: 526 Cotonou Benin Mahajan Minakshi 1 Department of Botany, Fergusson College, Pune-411004, India Das Snehangshu 2 Department of Botany, Shivaji University, Kolhapur-416004, India Mahajan Minakshi 1 Department of Botany, Fergusson College, Pune-411004, India Das Snehangshu 2 Department of Botany, Shivaji University, Kolhapur-416004, India Kumari Anupama 1 Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee 247667, Uttarakhand, India Majumder C.B. 2 Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee 247667, Uttarakhand, India Misra A.K. 3 Gas Hydrate Research and Technology Centre, ONGC, Panvel, Mumbai, India > Review Paper 2019 11 20 2020 10 22 Methanegas hydrates are nonstoichiometric crystalline form of solids which are form by the amalgamation of molecules of methane gas with the molecules of water at low temperature and high pressure. For oil, gas, chemical and other industries, the formation of MGHs has been a problem for many years because hydrate may block the pipelines or valves. Hydrate formation in a pipeline may also cause a blowout in the drilling operations. The knowledge of the equilibrium conditions of gas hydrate is obligatory for the economical and safe plan of operations in oil, gas, chemical industries where hydrate nucleation/formation occurred. It becomes important to measure the incipient conditions of hydrate formations for the system containing different inhibitors, promoters, salts, porous materials. The conditions of stability for MGHs in pure and seawater will be different because of the existence of ions and salts in seawater. The stability pressure of MGHs in seawater is higher than pure water, but the temperature for the gas hydrate can be lower in seawater than pure water. The stability conditions of MGHs can be disturbed by the simple addition of salts, electrolytes in the host sediments or water of MGHs. The co-existence of all dissolved ions in seawater depresses the dissociation temperature for the stability of methane hydrate ranges between pressures of 2.75-10 MPa. For seawater with a salinity of 33.5%, the observed offset in dissociation temperature was 1.1& Copyright@ International Science Community Association 8451; in comparison to pure water. Various researchers have done various experiments to find the stability conditions of MGHs at different temperatures and high pressure. The equilibrium curves for the methane MGHs in porous media has been shifted to the high pressure and lower temperature as compared to the equilibrium curves for the bulk MGHs.