Development and Application of a LCA Model for Coal Conversion Products (Coal to Y)

TOTAL Gas & Power launched a series of development studies in order to investigate the potential for coal conversion projects (coal to Y) for the production of fuels and primary products for the petrochemical industry. A crucial role is played by the aspects of carbon capture and storage (CCS). Based on these studies, a methodology and a model for life cycle analysis (LCA) were developed in order to understand the environmental impacts associated with Coal to Y conversion routes, especially regarding GHG emissions, water consumption, and energy efficiency. The model was designed around the need for adaptability to a) the geographic location of the coal mine and the coal to Y conversion plant, and b) the final products (e.g. methanol, DME, SNG and FT diesel) and their respective markets. By applying the model to a potential coal to methanol application by utilising original data and in-house expert advice, first results were generated, giving valuable insights especially into the critical elements of the CO2 management system. The developed LCA model is a powerful tool that can assist in analysing clean coal studies.