Mixture optimization of synthesized zeolites 4A and 13X for solar adsorption refrigeration application

Abstract In a way to overcome challenges with global warming, the use of fossil fuels in producing environmentally friendly energy towards reducing ozone layer depletion and greenhouse gas emissions by participating countries is interest. The adsorption refrigeration system has advantages long lifespan its environmental friendliness; however, major disadvantage low coefficient performance, which function adsorbent–adsorbate, zeolite–water as most common adsorbent–adsorbate working pair. Zeolites 4A 13X are used zeolite classes due their higher selectivity for separating mixtures CO2/N2 CO2/CH4/N2 high-water capability, respectively. this study, first time, synthesis zeolites from natural sources (Kankara kaolin) mixture optimization solar application were considered. Raw Kankara kaolin, beneficiated calcined kaolin synthesized characterized using X-ray fluorescence, while diffraction. Using simplex lattice design experiment, developed Brunauer, Emmett Teller analysis obtain pore size, specific surface area volume. statistical produced mathematical models response that significant size area. proposed an optimal solution 75 wt% 25 13X, gave desirability 0.944.