Method and device for producing waste plastic pyrolysis oil with reduced chlorine

Abstract

Embodiments of the present disclosure provide a method for producing waste plastic pyrolysis oil with reduced chlorine, the method including a first operation of charging a waste plastic feedstock and modified red mud into a reactor, and a second operation of pyrolyzing the waste plastic feedstock in the reactor and recovering pyrolysis oil, wherein when the modified red mud is subjected to X-ray diffraction (XRD) analysis, an intensity of a first peak at a 2θ diffraction angle of 14±0.1° is higher than an intensity of a second peak at a 2θ diffraction angle of 14.5±0.1°.

1 . A method for producing waste plastic pyrolysis oil with reduced chlorine, the method comprising:
 a first operation of charging a waste plastic feedstock and modified red mud into a reactor; and   a second operation of pyrolyzing the waste plastic feedstock in the reactor and recovering pyrolysis oil,   wherein when the modified red mud is subjected to X-ray diffraction (XRD) analysis, an intensity of a first peak at a 2θ diffraction angle of 14±0.1° is higher than an intensity of a second peak at a 2θ diffraction angle of 14.5±0.1°.   
     
     
         2 . The method of  claim 1 , wherein a ratio (I 1 )/(I 2 ) of the intensity (I 1 ) of the first peak to the intensity (I 2 ) of the second peak is 5 or more. 
     
     
         3 . The method of  claim 1 , wherein when the modified red mud is subjected to the X-ray diffraction (XRD) analysis, the intensity of the first peak at the 2θ diffraction angle of 14±0.1° is higher than an intensity of a third peak at a 2θ diffraction angle of 28.2±0.1°. 
     
     
         4 . The method of  claim 1 , wherein a ratio (I 1 )/(I 3 ) of the intensity (I 1 ) of the first peak to an intensity (I 3 ) of a third peak is 5 or more. 
     
     
         5 . The method of  claim 1 , wherein in the first operation, the modified red mud is charged into the reactor in an amount of 5 to 30 parts by weight with respect to 100 parts by weight of the waste plastic feedstock. 
     
     
         6 . The method of  claim 1 , wherein in the first operation, the modified red mud is charged into the reactor in the form of a paste by further containing moisture in an amount of 30 to 80 parts by weight with respect to 100 parts by weight of the modified red mud. 
     
     
         7 . The method of  claim 1 , wherein the second operation is performed at a temperature of 300 to 600° C. 
     
     
         8 . The method of  claim 1 , wherein the second operation is performed in a non-oxidizing atmosphere. 
     
     
         9 . The method of  claim 1 , wherein the first operation is performed by further containing an admixture. 
     
     
         10 . The method of  claim 9 , wherein the admixture is a cellulose ether-based compound.