Recycling Webinar
September 22, 2021
Scientific Program
Mahshab Sheraz
Hallym University, Chuncheon
Biography:
Mahshab Sheraz department of Environmental Sciences and Biotechnology, Hallym University, Chuncheon, Republic of Korea.
Abstract
This research contains the decomposition techniques for waste 1,1,1,2-tetrafluoromethane (HFC-134a). HFC-134a is a potent synthetic GHG with a GWP of 1300. The rise in demand for air conditioners has caused a steep increase in the atmospheric concentration of HFC-134a. This research explores the thermal and catalytic pyrolysis of waste HFC-134a over γ-Al2O3 calcined at temperatures of 550 °C (A550), 650 °C (A650), 750 °C (A750), and 850 °C (A850). The physicochemical properties of catalysts were studied through thermogravimetric analysis (TGA), Brunauer–Emmett–Teller equation for nitrogen physisorption analysis (BET), X-ray diffraction (XRD), and temperature-programmed desorption of ammonia (NH3-TPD). The non-catalytic pyrolysis of HFC-134a showed less than 15% decomposition of HFC-134a. Catalysts increased the decomposition as A650 revealed the highest decomposition efficiency by decomposing more than 95% HFC-134a for 8 h followed by A750, A850, and A550. The larger surface area and pore volume paired with a low amount of strong acidic sites were considered as the main contributors to the comparatively longer catalytic activity of A650.
- Climate changes
- E-waste recycling and management
- Waste water recycling
- Zero Waste
- Biogas production
- Solid waste management
