So far, pyrolysis and gasification are the only two chemical recycling pathways described to work for mixed plastic waste streams. There is a third way – cracking. A solid waste cracker operates at temperatures between a pyrolysis reactor and a gasifier and produces a product gas that is rich in C2 to C7 molecules, very similar to a Naphtha steam cracker furnace. It therefore enables a significantly shorter recycling loop than pyrolysis and gasification to produce the targeted circular monomers, avoiding additional reaction steps and the associated plastic-to-plastic yield losses. Operating at the “just right” temperature also ensures that unwanted heteroatoms present in the waste like O, N, S, and Cl end up predominantly in small molecules, that can be separated from the circular monomer streams using industry-proven gas-cleaning technologies. Our CEO Joerg Krueger will be speaking about this unique chemical recycling solution developed by SYNOVA and its partners at ERTC 2023 (https://lnkd.in/dwASgmH). Don’t miss it! #SynovaTech #temperature #cracking #pyrolysis #gasification #chemicalrecycling #circulareconomyforplastics #sustainability #technology #advancedrecycling #ERTC23 #ERTC #conference
You forgot chemolysis (or solvolysis), which is a much more selective way to recover much more valuable intermediates from mixed plastics than these gas phase technologies.
I would postulate that which temperature is "just right", depends on the nature of the product you wish to produce. Production of light C2-C7 components may be advantageous from an energy point of view and indeed does have positive effects on contaminants, it does imply a Centralized model, where large quantities of plastic waste is shipped to a single location to be converted into a product slate akin to that of a naphtha cracker. In a decentralized model, where waste is processed locally, pyrolysis technology producing liquid which can be shipped easily may be preferred. Having said that, I think both pathways can coexist and I am a HUGE fan of the SYNOVA technology as it basically creates a plastic waste to virgin-like polymer cracker! I am rooting for your success!
#Synova #Tech ✌ So far, pyrolys Hasta ahora, la pirólisis y la gasificación son las dos únicas vías de reciclaje químico descritas que funcionan para los flujos de residuos plásticos mixtos. Hay una tercera forma: el agrietamiento. Un craqueador de residuos sólidos funciona a temperaturas entre un reactor de pirólisis y un gasificador y produce un gas producto rico en moléculas de C2 a C7, muy similar a un horno de craqueo de vapor de nafta.
What can be said about the chemical inertia of the ashes for the three waste processing technologies?
How about the feedstock cleanup before entering the reactor? How do we efficiently perform that process?
Also de-polymerisation is a chemical recycling route for PET, PA etc.
Thank you for Information👍
What about the yield of the cracking process compared to pyrolysis?
Is no one adding hydrogen to the process? Seems like the best catalyst.
Retired
10moBetter make sure the metalurgical choice can withstand all the chlorides and bromides from a corrosion standpoint!