(712b) Techno-Economic Assessment of the Polygeneration of Liquid Fuels and Electricity By Solar Hybridised Gasification of Coal
The annual specific FTL output and the specific total energetic output (FTL and electricity) of the SCTL plant relative to the conventional coal-to-liquid (CTL) were found to increase by 12% and 15%, respectively, as the SM was increased to 3. On the other hand, the annual reduction in mine-to-tank (MTT) CO2 emission from the SCTL relative to the CTL was reduced by 17%. The utilization factor of the FT and power generation plants in the SCTL was significantly influenced by the syngas storage capacity. The utilization factor for the SCTL with no syngas storage was calculated to be 74% compared with 93% for the SCTL with 4 hours syngas storage capacity.
To produce 1500 barrels per day of FTL, the levelised cost of fuel (LCOF) for the CTL was estimated to be USD1.2/L2012. The LCOF for the SCTL with no syngas storage was increased from USD1.3/L2012 to USD1.4/L2012, and from USD1.4/L2012 to USD1.5/L2012 with 4 hours syngas storage capacity, as the SM was increased from 0.5 to 3. Despite the fact that the outputs from the SCTL were higher than that of the CTL, this could not overcome the high cost of the solar components and the syngas storage system. Furthermore, the LCOF for the SCTL is sensitive to several parameters identified in the sensitivity analysis, such as the total plant cost, the assumed cost for carbon capture and sequestration, and the operation and maintenance costs.