Fuels
- Natural Gas
- Diesel Oil
- 2 Light Oil
- Naptha
- Kerosene
- Crude Oil
- 6 Heavy Oil
- Tar
- Pitch
- Asphalt
- Liquid Cyanide
- Coal Gas
- Refinery Gases (RFG)
- Blast Furnace Gas (BFG)
- Coke Oven Gas (COG)
- Landfill Gas (LFG)
- Coal
- Lignite
- Pulverized Coal
- Biomass
- Wood
- Wood Dust
- Ground Rice Hulls
- Bark
- Bagasse – sugar cane/waste
- Alcohols
- Carbon Slurry
- Propane
- Butane
- Carbon Monoxide
- FCC Off-Gas
- Cupola Off-Gas
- Reactor Off-Gas
- Process Off-Gas
- Catalytic Reforming Off-Gas
- Spent Sulfite Liquor – Ammonia Base
- Spent Sulfite Liquor – Calcium Base
- Blast Furnace Gas
- Hydrogen Gas
- Hydrogen Cyanide
- Hydrogen Sulfide
- High-Density Fiberboard (HDF) Dust
- Agricultural Wastes – stalks, shells, fronds, etc.
- Refuse Derived Fuel (RDF) – urban garbage
- Municipal Solid Waste (MSW)
- Tire Derived Fuel (TDF)