Recycle of plastic residues in cellular phones through catalytic hydrocracking to liquid fuels

Assessment of acidity and the zeolite porous structure on hydrocracking of HDPE

“…[12][13][14] The acid function is responsible for the cracking and isomerization reactions, while the metallic one promotes the hydrogenation and dehydrogenation (HD/DHD) reactions. Monofunctional systems, comprise different types of zeolites (H-ZSM-5, [15][16][17] H-USY, 10,16,18,19 and H-beta 20 ), silicaalumina 16,21 and solid superacids (ZrO 3 /SO 4 22,23 Fe 2 O 3 /SO 4 (Pt/H-ZSM-5, 25,26 Ni/H-ZSM-5, 27 Pt/H-USY, 19,28,29 and Pt/Hbeta 30,31 ), NiMo or Pt-based alumina, silica or silica-alumina (NiMo/Al 2 O 3 , 32,33 Pt/SiO 2 , 34 and NiMo/SiO 2 -Al 2 O 3 35 ), Ni and Ptbased solid superacids (Pt/ZrO 2 -SO 4 , 36,37 and Ni/ZrO 2 -SO 4 38 ) or other less common combinations (RuWZr, 39 Ru/carbon, 40 and Pt/SrTiO 3 41 ). Among the studied systems, zeolites are by far the most used materials either as monofunctional catalysts or as an acidic source in the bifunctional systems.…”

Total revalorization of high impact polystyrene (HIPS): enhancing styrene recovery and upcycling of the rubber phase

“…[8][9][10][11][12] Actually, the waste produced by electronic equipment, known as "waste electrical and electronic equipment" (WEEE), reached 59 million tons by 2022, with HIPS representing 42% of all WEEE. 13,14 Current valorization techniques for polyolefins (including PS) involve pyrolysis reactions, perhaps the most common approach, 15 metathesis reactions, like ethenolysis, 16 hydrogenolysis over metal catalysts, 17 hydrocracking over bifunctional catalysts, 18 among others. However, in all of these systems, there is still room for growth and further upgrading before industrial implementation.…”