Study On The Influence Of Different Catalysts On The Catalytic Pyrolysis Of WPCB And Light Of Pyrolytic Oil

The pyrolysis of WPCB has been extensively studied, since it represents a potentially useful alternative recycling technique and it has the advantages of separating and recycling of all the components. However, the recycling of oils resulting from WPCB pyrolysis is currently difficult since these oils contain a significant heavy fraction as well as high levels of bromine. There have been many reports of studies concerning the catalytic pyrolysis of other waste organic polymers, including plastics, tires and so on. The purpose of the present study was to investigate effects of using a combination of pyrolysis, catalysis and vacuum through the analysis of the phase distribution, boiling point fractions and composition and carbon number distribution of pyrolytic oil. And, the study can further complete recycling of pyrolytic oil.A significant quantity of pyrolytic liquid obtained in the catalytic pyrolysis of WPCB for recycle of oil, when use of HZSM-5. However, a lower yield of pyrolytic solid and proportion of organic components in solid can be observed, because the WPCB can be decomposed almost completely in the catalytic pyrolysis with activated Al2O3. It can make for minimization of WPCB and recycling of pyrolytic gas.When alumina is employed, the phenol content increases and exceeds50.0%at the catalyst-to-feed ratio of2.0, which is helpful with regard to the potential application of the oil as a raw material for the manufacture of phenolic resin. The alumina has a certain debromination for catalytic pyrolysis of WPCB, because only1.56%of2-bromophenol existed in the oil.The C15fraction of oil decreases, while the catalytic pyrolysis of WPCB with alumina. The majority of the pyrolytic oil are in the range C6to C9. This is a very promising result with regard to the potential applications of these liquids, since C5-C10is the carbon number range of gasoline.The fraction of the oil in boiling point range of0-250℃(light component or gasoline) can reach56%. With more alumina, an apparent effect on light of oil can be observed, it can meet the light of oil, when the catalyst-to-feed ratio is1.5. It has no effect on debromination and carbon number distributions of oil resulting from catalytic pyrolysis of WPCB with HZSM-5and USY. But, the heavy components of pyrolysis oil reduce by9%, while use of HZSM-5at600℃. The USY is useless for the light of pyrolytic oil.The results of the study show that it is feasible to complete recycling of pyrolytic oil resulting from catalytic pyrolysis of WPCB with activated Al2O3. It can convert the organic components of WPCB into useful fuel and chemical feedstock resources for preparation of phenolic resin.