The Book Covers Up - To - Date Numerical And Semi - Empirical Models Describing Interphase Phenomena In High - Temperature Conversion Processes, With A Particular Emphasis On Gasification. Consequently, It Focuses On The Description Of Gas - Particle Reaction Systems By State - Of - The - Art Computational Models In An Integrated, Unified Form. Special Attention Is Paid To Understanding And Modeling The Interaction Between Individual Coal Particles And A Surrounding Hot Gas Including Heterogeneous And Homogeneous Chemical Reactions On The Particle Interface And Near The Interface Between The Solid And Gas Phases