Umar FAROOQ, Zakir KHAN, Saira ATTIQUE, Madeeha BATOOL, Muhammad Irfan JALEES, Khurram SHEHZAD, Fawad ASHRAF, Asma Tufail SHAH

163196

Highly efficient catalytic degradation of low-density polyethylene Using a novel tungstophosphoric acid/kaolin clay composite catalyst

Highly efficient catalytic degradation of low-density polyethylene Using a novel tungstophosphoric acid/kaolin clay composite catalyst

In order to take advantage of the Brønsted acidity of tungstophosphoric acid (TPA) and Lewis acidity ofkaolin, TPA-loaded kaolin catalysts with varying percentages of TPA (10–50 wt.-%) were prepared by wet impregnationmethod. Fourier transform infrared spectrometer, X-ray diffractometer, Brunauer–Emmett–Teller surface area analyzer,and scanning electron microscope characterizations were performed to confirm the successful loading of TPA on kaolin.Catalytic cracking of low-density polyethylene (LDPE), by employing TPA-loaded kaolin as the catalyst, produced ahigher percentage of fuel oil (liquid and gaseous hydrocarbons) with a negligible amount of semisolid wax (1.0 wt.-%).The wax amount was significantly lower compared to the thermal cracking, which produced ∼22 wt.-% solid blackresidue. Moreover, GC-MS analysis of oil showed that thermal cracking produced mainly higher hydrocarbons (C 22)as compared to the catalytic cracking where larger fraction of lower hydrocarbons were obtained. We purpose thatthe higher performance of prepared catalysts was due to the presence of both Brønsted and Lewis acid sites, whichincrease their catalytic efficiency and degraded LDPE at the relatively lower temperatures. These results suggest thatprepared materials were effective catalysts with low cost and easily scalable production method, suitable for large-scalehigh performance catalytic cracking of polymers.
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Turkish Journal of Chemistry-Cover
  • ISSN: 1300-0527
  • Yayın Aralığı: 6
  • Yayıncı: TÜBİTAK
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