Heating Value of Synthesis Gas and Gasification Efficiency

The calorific value of the produced synthesis gas (dry basis) can be obtained by the sum of the calorific values of each of its compounds (H2, CO, CH4, and H2S) multiplied by their mole fractions in dry basis (Melgar et al., 2007). Table 4.4 presents the specific calorific values of major compounds in the synthesis gas. The heat input of H2S is minimal due to its small concentration in the gas  

By the first law of thermodynamics, the cold gas efficiency ( q. p is defined as the ratio of energy in the produced synthesis gas and the energy that enters with the feed ( to the gasifier, assuming that the synthesis gas leaves the process 

Taking into account that the combustion reactions are exothermic, can be defined by the following equations, where n, 2. and are the number of moles obtained per mole of vacuum residue (dry basis ash-free) according to the reaction (4.17)  

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