Cold Gas Efficiency and Methane Yield Diagram

In contrast, the INQ, E-Gas (second stage) and BGL systems approach the maximum in domain C. Two stages or independent gas inlets provide the flexibility for an optimized process design (see Ch ter 9). The diagram shows a value of approximately 78% cold gas efiiciency for the Lurgi FBDB gasifier for idealized equilibrium. 

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Figure 7.6 Gasification diagrams (Pittsburgh No. 8 coal [Pitt 8], 30 bar) for (a) temperature and carbon conversion, (b) cold gas efficiency and methane yield (with permission from Ref. [18]. Copyright 2014, Elsevier), (c) syngas yield and H2/CO ratio (with permission from...

As an example. Figure 7.15 demonstrates how diagrams for cold gas efficiency and dry methane yield would like if H2O is replaced by CO2 as gasifying agent... 

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