Optimising Production of Synthetic Natural Gas (SNG) From Methane Synthesis

ABSTRACTTo optimise the methanation of synthesis gas (syngas) with a focus on achieving maximum methane and minimum CO, a comprehensive thermodynamics analysis of hydrogenation is conducted. This study will help us to understand the thermodynamic behaviour of the reactions involved in the methanation process. We have investigated the species, , , , and CO at the equilibrium in a temperature range of 200–1200 with pressure variation of 1 to 300 atm and a fuel composition of . Low temperatures (200–400) and high pressures are favourable for the complete consumption of and as well as to obtain maximum . Also, in this temperature range, there is no formation of the species CO. The formation of CO becomes a serious issue from 400 for low pressures, for example, 1 atm. This can be shifted to slightly higher temperatures, i.e., 600 if high pressures are selected. The study can help us to select the optimum conditions (temperature and pressure) to perform the experiments to achieve maximum by full methanation of . This will also support us for the development of catalysts and processes for the production of natural gas which can be reintegrated into the network of natural gas.