Plastic pollution tau dhau los ua ib qho kev sib tw thoob ntiaj teb. Incineration thiab landfilling ua rau muaj kuab paug thib ob, thaum kev siv tshuab ua dua tshiab feem ntau ua rau cov khoom siv degraded thiab txo tus nqi. Pyrolysis tuaj yeem hloov cov yas rau hauv siab - cov tshuaj muaj txiaj ntsig, tab sis cov txheej txheem cua sov tsis tu ncua (CCH) cov txheej txheem tawm tsam los tswj cov kev cuam tshuam thib ob, ua rau cov khoom tsis tshua muaj monomer thiab ntau cov khoom lag luam. Yog li ntawd, kev tsim kho siab -kev ua tau zoo pyrolysis thev naus laus zis uas tuaj yeem tswj tau cov txheej txheem tshuaj tiv thaiv thiab txhim kho monomer selectivity yog qhov kev xav tau tseem ceeb ntawm kev tshawb fawb.
Raws li cov tib neeg, peb tuaj yeem pab txhawb los ntawm kev txo qis kev siv, rov siv dua, thiab rov ua dua cov yas kom zoo, tab sis qhov kev daws teeb meem tseem ceeb yuav tsum muaj kev hloov pauv hauv kev lag luam thiab cov cai muaj zog thoob ntiaj teb. Yas nws tus kheej tsis yog "dab ntxwg nyoog"; nws yog ib qho khoom siv zoo heev. Qhov teeb meem nyob hauv peb "siv-thiab- pov tseg" cov qauv kev lag luam thiab kev tswj tsis tau zoo. Lub neej yav tom ntej yog nyob rau hauv kev tsim ib ncig kev lag luam rau plastics.
Cov pab pawg tshawb fawb hauv tsev tau tsim ib lub tswv yim los tiv thaiv cov tshuaj tiv thaiv theem nrab hauv polyethylene pyrolysis los ntawm cov txheej txheem "sai cua sov- ceev ceev". Cov txheej txheem no feem ntau cuam tshuam nrog kev cuam tshuam C-H daim ntawv cog lus cleavage thiab ethylene condensation thaum lub caij txias, yog li ua kom cov ethylene monomer tawm los (txog 12 npaug ntawm CCH), thaum txo cov tar thiab char tsim thiab txhim kho H / C piv ntawm cov tar los txhim kho nws cov txiaj ntsig zoo thiab siv tau. Kev siv dav ntawm cov cuab yeej siv no yuav pab txo qis cov pa phem.
