Ffective. Investigation on the 2-Hydroxybutyric acid manufacturer catalytic pyrolysis of HFC134a showed a high conversion price when waste concrete was utilized as a catalyst at 600 C and calcium fluoride was located to be the key solution [17]. Metal phosphate catalysts had been also applied towards the decomposition of HFC134a and had been located to become effective as catalysts [18]. Researchers also reported the influence of Lewis acidity around the dehydrofluorination of 1,1,1,2tetrafluoroethane [19]. The catalytic decomposition of 1,1,1,2tetrafluoroethane to yield TrFE using a NiO/Al2 O3 catalyst was also reported. Nevertheless, the conversion rate making use of this catalyst was substantially reduced [20]. The catalytic conversion of HFC134a over Al2 O3 B was suggested as an effective course of action, top to a high conversion rate [21]. Current research showed that Mgdoped Alumina exhibited a greater decomposition efficacy than Al2 O3 for HFC134a decomposition as well as the significance of calcination Iprodione Reactive Oxygen Species temperature was also emphasized [22]. The impact of calcination temperature around the catalysts for the helpful decomposition of greenhouse gases was investigated by Jia et al. [19]. It was located that the decomposition efficiency of Al2 O3 differed at distinctive calcination temperatures because the quantity of acidic web-sites and also the phases of Al2 O3 have been altered by a modify inside the calcination temperature. Amongst Al2 O3 catalysts differing in their phase, Al2 O3 was revealed to possess the highest efficiency for the decomposition of HFC134a. Thus, a much more detailed study with the distinct decomposition patterns of HFC134a over Al2 O3 calcined at different temperatures will be extremely interesting. Additionally, it is essential to study the influence of surface properties and acidic web pages around the catalyst lifetime. Therefore, the pyrolysis of HFC134a over Al2 O3 calcined at distinctive temperatures, 550 C (A550), 650 C (A650), 750 C (A750), and 850 C (A850) was investigated in this study. The acidity, pore size, surface region, and phase of Al2 O3 calcined at distinctive temperatures had been analyzed applying NH3 TPD, BET, and XRD. The decomposition tendency of HFC134a more than 4 Al2 O3 calcined at various calcination temperatures was determined applying a vertical plug flow reactor coupled using a Gas Chromatography and Mass Spectrometry technique. 2. Results and Discussion two.1. Catalytic Pyrolysis of HFC134a The outcomes from noncatalytic and catalytic pyrolysis of HFC134a at 600 C over diverse Al2 O3 catalysts are shown in Figure 1. It was observed that the noncatalytic decomposition rate of HFC134a was reduced than 15 at 600 C. The noncatalytic decomposition of HFC134a has also been reported in [17], exactly where it was indicated that a high reaction temperature (750 C) is necessary to facilitate a decomposition rate of greater than 99 . The catalytic decomposition of HFC134a at 600 C was larger than 99 with all catalysts in the initial stage from the reaction. Higher conversion of HFC134a more than all of the Al2 O3 catalysts was steady till about 5 h of reaction time and then decreased to less than 20 following 10 h in all instances except A650. The decomposition price was maintained atCatalysts 2021, 11,three ofmore than 95 for 8 h more than A650. The other Al2 O3 catalysts have been located to be deactivated before 8 h, which resulted in the decomposition of a lesser level of HFC134a compared with A650.Figure 1. Thermal and catalytic conversion price of HFC134a more than Al2 O3.The relative quantities of trifluoroethylene (TrFE, HFO1123), that is formed as the main item, and the byproduct carbon.