## 5 A Different Method to Increase the Process Efficiency  
According to several research findings, adding waste polymers with a significant quantity of polyolefin as an additive improved the amount of liquid generated in addition to the gaseous fraction from biomass pyrolysis [12; 13; 71; 72; 73; 74; 75; 76; 77; 78; 79]. Some polymeric pyrolysis solutions can be made more efficient by including catalysts. Their applications can potentially improve the thermochemical processing efficiency of plastic waste pyrolysis. Catalysts can increase the process efficiency, allowing for a lower reaction temperature [90] and boosting process selectivity by minimising the production of undesired byproducts [91]. They can also impact the rate of polymeric chain breakdown. Using a catalyst can accelerate polymer breakdown [92]. The heat degradation of polymeric materials makes them a valuable source of polycyclic aromatic hydrocarbons. Aside from being detrimental to one's health and the environment, they also play a significant role in a variety of industry sectors. Benzene is commonly found in unleaded gasoline as a lead alternative, allowing for smoother operation. Furthermore, materials containing 50% benzene are used in the production of ethylbenzene, which is widely used to create styrene, together with a solvent for dyes and inks [19]. Approximately 20% of benzene is utilised as a raw material in the synthesis of phenol, 15% in the synthesis of hydrogenated cyclohexane, 5% in the synthesis of aniline and alkyl benzenes, and 10% in the synthesis of maleic anhydride, chlorobenzene, and other compounds. p-Xylene is utilised in the production of PET, which is used to create plastic bottles [19]. Toluene is a low-cost and simple solvent that is widely utilised in industrial processes. To boost the octane value of gasoline, it is typically combined with toluene [93; 94; 95]. Furthermore, toluene is a significant source of polyurethane synthesis. Toluene is used to make toluene diisocyanate (TDI) monomers, which are used in the manufacturing of polyurethane [96]. Ethylbenzene is commonly used in industrial operations to produce styrene, which is then used to produce polystyrene. Ethylbenzene can also be found as a solvent in inks, dyes, and gasoline. Xylene is widely employed in the production of plastic bottles and polyester clothes, and a solvent with a wide range of uses, including circuit board cleaning and paint and varnish thinning [97; 98]. Xylene mixtures are employed in solvents, and o-xylene is used as a feedstock for phthal anhydrite synthesis. The principal applications are the manufacture of toluene and phenol, which are raw ingredients for the synthesis of caprolactams [99]. As a result, aromatic hydrocarbons including benzene, toluene, ethylbenzene, and xylene (BTEX) are desirable commodity chemicals in the fine chemical and petrochemical industries [98]. Aromatic nitriles, such as terephthalonitrile and benzonitrile, have a wide range of applications in the pharmaceutical industry, insecticides, dyes, and polymers [100; 101]. On the other hand, 1,4-benzenedicarbonitrile [102; 103; 104] is a highly valuable chemical that can be used to produce the raw materials for producing epoxy and polyurethane resins (p-phenylenediamine), terephthalic acid (for PET production), or polyamide polymers (as a light-sensitive material) [105; 106; 107; 108; 109; 110; 111; 112; 113]. Another chemical,methylstyrene, has numerous applications in diverse industries. Plastics used to create ABS resins, for example, are utilised as a raw material in paintings and as an adhesive in the manufacture of lubricants and plasticizers [114; 115; 116; 117; 118; 119; 120; 121].