Polystyrene pyrolysis using silica-alumina catalyst in fluidized bed reactor

Pyrolysis Process of Mixed Polypropylene (PP) and High-Density Polyethylene (HDPE) Waste with Natural Zeolite as Catalyst

“…On the other hand, the proportions of liquid yield in temperature variations of 410, 420 and 430ºC were 54.86%, 62.12%, and 56.38% respectively. These results corroborate those of other research (Aboulkas et al, 2010;Moqadam et al, 2015) in which thermal and catalytic degradation polystyrene mainly produces liquid.…”

“…Several authors have studied pyrolysis of polymers such as the mixed between polyethylene (PE) and polypropylene (PP) (Sakaki, Roozbehani, Shishesaz, & Abdollahkhani, 2014), mixed polymers containing different concentrations of low density polyethylene (LDPE), HDPE, and PP, (Roozbehani, Sakaki, Shishesaz, Abdollahkhani, & Hamedifar, 2015), polystyrene (Moqadam, Mirdrikvand, Roozbehani, Kharaghani, & Shishehsaz, 2015), high density polyethylene (Levine & Broadbelt, 2009), polyolefins wastes (Mastellone & Arena, 2002), polypropylene (Gogotov & Barazov, 2014;Chen et al, 2007;Åkesson et al, 2013;Kumar & Singh, 2014), mixed between high density polyethylene and rubber seed shell (Chin et al, 2014), mixed between PE and PP (Aboulkas et al, 2010), mixed between olive residue with HDPE, (LDPE), (PP), and PS (Aboulkas et al, 2009), municipal plastic waste (MPW) consisting of a mixture of thermoplastics (HDPE, LDPE; PP; PS; and PET (Silvarrey & Phan, 2016), PE (Borusiewicz & Kowalski, 2016), coal and plastics blends ( Zhou, Luo, & Huang, 2009), natural rubber (Al-hartomy et al, 2014), waste HDPE (Schwarzinger, Gabriel, Beimann, & Buchberger, 2012), binary mixtures PP and LDPE (Chowlu, Reddy, & Ghoshal, 2009), mixed between LDPE, HDPE, PP (Donaj, Kaminsky, Buzeto, & Yang, 2012).…”

“…The catalysts utilized in upgrading plastics are generally classified into a fluid cracking catalyst, reforming catalysts, and activated carbon (Kunwar, Cheng, Chandrashekaran, Sharma, 2016). Catalyst commonly used by many researchers include zeolites, cadmium, active matrix component, inactive matrix component, and binder (Roozbehani et al, 2017), silica-alumina (Moqadam et al, 2015), zeolite-based catalyst such as KBeta, HMOR, HZSM-5, HY, and KL zeolite (Levine & Broadbelt, 2009;Muenpol, Yuwapornpanit, & Jitkarnka, 2015), carbonsilica (Al-hartomy et al, 2014), zinc acetate ( Siddiqui, Redhwi, & Achilias, 2012), natural zeolite without zeolite (Yuliansyah & Laksono, 2015), triethylaluminum Al (C 2 H 5 ) 3 (Donaj et al, 2012), commercial Y zeolite and natural zeolite (Syamsiro et al, 2014), zeolite-based catalyst such as ZSM-5, BEA, US-Y, MOR (modified nanocrystalline Y, amorphous silica-alumina (SAHA), silica-alumina and the family of mesoporous MCM material (Roozbehani et al, 2017). The aims of research are to investigate the influence of the rate of temperature and raw material to natural zeolite (wt%) on gas, liquid, and solid yields in the pyrolysis of mixed between PP and HDPE and to identify the physical properties of fuel, namely its specific gravity, API gravity, gross heating value, flash point, pour point, and kinematic viscosity.…”

Pyrolysis of Polyethylene Terephthalate Granules in Presence of Lewis Brønsted Acid Sites Catalysts

“…The plastic type alone affects the yield of the pyrolysis process, molecular weight distribution and the quality of liquid products gained in the catalytic degradation process of waste plastics (Kumar and Rao 2003). In our previous studies in clean technologies and environmental policy, we have reported catalytic degradation of single and mixed polymer granules such as polystyrene, high density and low density polyethylene mixtures, which include various types of urban waste plastic disposals (Roozbehani et al 2014(Roozbehani et al , 2015(Roozbehani et al , 2016Sakaki et al 2014;Imani Moqadam et al 2015). Among all materials discussed so far, Polyethylene Terephthalate (PET) is rather a unique agent.…”

Effect of catalysts on the conversion of polystyrene plastic waste into fuel with the Catalytic Cracking Method

“…Therefore, the cataly c pyrolysis method developed to overcome the problems of thermal pyrolysis. A range of catalysts has been u lized, including Zn bulk [18], Al-MSU-F [19], natural zeolite [20], and silica-alumina [21] in cataly c pyrolysis to improve the quality of liquid oil. This research will examine the effect of various catalysts such as zeolite and alumina for cataly c cracking processes on the conversion of polystyrene plas c waste.…”