Evaluation Of The Synthesis Of Zeolite Ssz-13 Using Choline Chloride And Different Crystallization Seeds And Its Application In The Thermocatalytic Degradation Of Ultra-High Molecular Weight Polyethylene

The synthesis of SSZ-13 was studied by evaluating the influence of two types of crystallization seeds with CHA structure (S-1 seeds prepared in fluoride medium and S-2 seeds by the conversion of zeolite Y), SiO2/Al2O3 (28, 40, 60 and 100) and OH/SiO2 (0.6 and 0.8) ratios. Choline chloride was used as the structure-directing agent and the crystallizations occurred at 140 degrees C from 24 to 96 h. S-1 seeds led to the coexistence of zeolites SSZ-13 and P, while S-2 seeds promoted in all SiO2/Al2O3 ratios and OH/SiO2 = 0.8, the formation of pure SSZ-13 after 24 h. The SSZ-13 samples are formed by clusters of crystals with cuboid-like morphology and exhibited textural properties typical of CHA framework. SSZ-13 zeolite led to a decrease in the temperature and the activation energy required for the degradation of ultra-high molecular weight polyethylene polymer, demonstrating its efficiency as catalyst in this process.