Catalyst for distributed batch microwave pyrolysis, system and process thereof

Abstract

The present document describes a catalyst to initiate microwave pyrolysis of waste, a process for the microwave pyrolysis of waste using the catalyst, as well as a microwave pyrolysis system.

1 . A distributed small scale batch microwave pyrolysis system for pyrolysis of domestic or municipal waste, which comprises:
 a) a reactor vessel having
 a waste inlet; 
 a fluid inlet for injecting a fluid into said reactor vessel; and 
 an internal coating to prevent accumulation of microwave reactive residues in said reactor vessel; 
   b) a microwave source emitting microwaves within said reactor vessel,   c) an agitator for breaking and mixing a waste material within said reactor vessel, and   d) an anaerobic means for purging said reactor vessel of air, said anaerobic means comprising water, steam or both, for generation of steam inside said reactor vessel when a pyrolysis reaction starts inside said reactor vessel.   
     
     
         2 . The pyrolysis system according to  claim 1 , further comprising a temperature probe for measuring a core temperature within said reactor vessel. 
     
     
         3 . (canceled) 
     
     
         4 . The pyrolysis system according to  claim 2 , wherein said anaerobic means further comprises at least one of an inert gas or a liquid. 
     
     
         5 . (canceled) 
     
     
         6 . The pyrolysis system according to  claim 9 , wherein said anaerobic means is provided to said pyrolysis system through said fluid inlet in fluid communication with said reactor vessel. 
     
     
         7 . The pyrolysis system according to  claim 1 , wherein said fluid is chosen from an acidic solution, said anaerobic means or combinations thereof. 
     
     
         8 . The pyrolysis system according to  claim 1 , wherein said anaerobic means further comprises a source of a vacuum. 
     
     
         9 . (canceled) 
     
     
         10 . The pyrolysis system according to  claim 1 , wherein said temperature probe comprises a sealed channel with very low microwave interaction. 
     
     
         11 . The pyrolysis system according to  claim 1 , wherein said microwave source is a magnetron tube. 
     
     
         12 . The pyrolysis system according to  claim 11 , wherein said magnetron tube is coupled to a microwave diffuser diffusing said microwave inside the reactor vessel. 
     
     
         13 . The pyrolysis system according to  claim 1 , further comprising a separation grid for separation of a recyclable residue from a carbonaceous residue after a pyrolysis reaction. 
     
     
         14 . (canceled) 
     
     
         15 . The pyrolysis system according to  claim 1 , further comprising a collection element for collecting the gas and oil produced therein. 
     
     
         16 . (canceled) 
     
     
         17 . The pyrolysis system according to  claim 15 , wherein said collection element is coupled to a filter. 
     
     
         18 . (canceled) 
     
     
         19 . (canceled) 
     
     
         20 . The pyrolysis system according to  claim 17 , further comprising a scrubber coupled to said filter. 
     
     
         21 . The pyrolysis system according to  claim 15 , wherein said collection element comprises a condenser element, at least one oil receiving vessel, a gas receiving vessel, a combined oil and gas receiving vessel or a combination thereof. 
     
     
         22 . (canceled) 
     
     
         23 . (canceled) 
     
     
         24 . The pyrolysis system according to  claim 21 , wherein said condenser element further comprises at least one of a cooling system, a pressure reducing valve, a pressure probe, at least one condenser or combinations thereof. 
     
     
         25 . (canceled) 
     
     
         26 . (canceled) 
     
     
         27 . (canceled) 
     
     
         28 . The pyrolysis system according to  claim 21 , further comprising a compressor connected to said collection element. 
     
     
         29 . (canceled) 
     
     
         30 . The pyrolysis system according to  claim 15 , further comprising a catalyst bed arrangement for locally upgrading of said oil. 
     
     
         31 . The pyrolysis system of  claim 30 , wherein said catalyst bed is chosen from Nickel-Phosphate (Ni 2 P), Titanium oxides (TiO 2 , rutile, anatase), Aluminium oxides (Al 2 O 3 ), Iron oxides (Hematite, Fe 2 O 3 , Goethite FeO(OH), Silicium oxides (SiO 2 ), Ru—TiO 2 , calcium aluminum silicate (Ca a Al b Si c O d ), red mud and combinations thereof. 
     
     
         32 . The pyrolysis system of  claim 30 , wherein said catalyst bed comprises an oxide mixture comprising from about 30 to 40% Fe 2 O 3 , from about 15 to 25% Al 2 O 3 , from about 10 to 20% SiO 2 , and from about 3-8% TiO 2 . 
     
     
         33 . The pyrolysis system of  claim 30 , wherein said catalyst bed further comprises a support of particles of alumina, silica, zirconium oxide (ZrO 2 ), and/or titanium oxide (TiO 2 ) having a pore size of about 20 to 60 microns. 
     
     
         34 . (canceled) 
     
     
         35 . The pyrolysis system of  claim 15 , further comprising a molecular sieve located after said catalyst for purification of said gas. 
     
     
         36 .- 61 . (canceled)