This page relates to Thermal Expansion, which has built-in support!

The following script will add Dirt as a Fuel that produces 1000 RF.

ZenScript
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// <recipetype:thermal:stirling_fuel>.addFuel(String name, IIngredient ingredient, int energy);
<recipetype:thermal:stirling_fuel>.addFuel("stirling_test", <item:minecraft:dirt>, 1000);

The following script will remove Coal Blocks as a Fuel.

ZenScript
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// <recipetype:thermal:stirling_fuel>.removeFuel(IItemStack outputItem);
<recipetype:thermal:stirling_fuel>.removeFuel(<item:minecraft:coal_block>);