Words to Describe feedstock

How feedstock often is described ("________ feedstock")

• raw
• gaseous
• light
• useful
• principal
• organic
• original
• catalytic
• solid
• alternative
• hot
• clean
• mixed
• economical
• unreacted
• desirable
• specific
• incoming
• cost
• containing
• potential
• abundant
• viable
• virgin
• primary
• heavy
• fresh
• natural
• additional
• blended
• derived
• renewable
• conventional
• important
• suitable
• excellent
• main
• black
• sufficient
• particular
• chemical
• inexpensive
• uniform
• acceptable
• liquid
• based
• crude
• initial
• usual
• heavier
• attractive
• basic
• preheated
• dry
• expensive
• cheaper
• lighter
• valuable
• generic
• available
• agricultural
• dilute
• dominant
• typical
• cheap
• pure
• prime
• quality
• homogeneous
• wet
• fossil
• carbonaceous
• impure
• major
• ideal
• complex
• industrial
• recycled
• preferred