If jet engines did leave chemtrails, wouldn't the chemicals cause adverse reactions in the engines?
Jet fuel is seldom if ever pure hydrocarbon molecules. It's got a lot of other stuff mixed into it to improve the properties. I'm going to quote Shell for the sake of examples:


  Antioxidants (gum inhibitors) must be used in Avgas to prevent the
  formation of gum and other antioxidation products. Jet fuels, which
  are inherently more stable than gasolines, may contain them, depending
  on the treatment process used during manufacture.
  
  A metal deactivator - now rarely used - may be added to nullify the
  effects of dissolved trace metals, especially copper, which can impair
  the thermal stability of jet fuels.
  
  Corrosion inhibitors can be used to reduce corrosion in fuel system
  and improve the lubricity - lubricating properties - of jet fuels.
  
  Fuel system icing inhibitors reduce the freezing point of any water
  that may be in the fuel system and prevent the formation of ice
  crystals that could restrict fuel flow. They are mandatory in military
  Jet but are not used in civil aircraft that have fuel heaters. They
  may be added to either Jet or Avgas during the fuelling of small
  aircraft.
  
  Static dissipater additives minimise the hazardous effects of static
  charges that build up during movement of jet fuels. They are sometimes
  used in Avgas as well. Source


Further analysis

No practical application: 


  Aluminium based aerosols, Mono-atomic gold, Nano aluminum-coated fiberglass, Radioactive thorium, Cadmium, Chromium, Nickel, Desiccated blood, Mold spores, Yellow fungal mycotoxins, Polymer fibers, Barium.


Useful additives from your list: 


  
  Ethylene dibromide- Anti-Knock agent in aviation fuel.
  Alumium: Derivatives containing it have been used.
  


Many of the materials you list might have the very real potential to (seriously) damage jet turbines and piston engines if mixed in during extended use.