Gasification. The heating values of gases produced by oxygen blown gasification fall in the range of 200 to 400 Btu/SCF. The Hydrogen (H2) content of these fuels are normally above 30% by volume and have HI/CO mole ratio between 0.5 to 0.8. Oxygen blown gasification fuels are often mixed with steam for thermal NO(x) control, cycle efficiency improvement and/or power augmentation. When utilized, the steam is injected into the combustor by an independent passage. Due to high hydrogen content of these fuels, oxygen blown gasification fuels are normally not suitable for Dry Low NO(x) (DLN) applications. (See Table 2) The high flame speeds resulting from high hydrogen fuels can result in flashback or primary zone re-ignition on DLN pre-mixed combustion systems. Utilization of these fuels shall be reviewed by GE.
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Sources: Long Term Parts & Long Term Service Contract (Tenaska Georgia Partners Lp), Long Term Parts & Long Term Service Contract (Tenaska Georgia Partners Lp)