Energies, Vol. 12, Pages 3253: Retraction: Nakaten N. and Kempka T. Techno-Economic Comparison of Onshore and Offshore Underground Coal Gasification End-Product Competitiveness. Energies 2017, 10, 1643 (Energies)

A programming error in our simulation model resulted in the overestimation of three input mass streams, inducing follow-up errors in the mass and energy balance calculations as well as the economic assessment, so that the results presented in the manuscript [...]