Dataset：Potassium Modification on Al₂O₃ Surface and Synergistic Regulation of Propane Dehydrogenation PtSn Active Sites

The dataset used in this study is primarily intended to investigate the effect of potassium (K) modification on the surface hydroxyl groups of Al₂O₃ catalysts and its regulation of Pt-Sn active sites, especially in the propane dehydrogenation reaction. The data mainly come from the preparation, characterization, and catalytic performance testing of the catalysts. In the experiment, PtSn-Kx/Al₂O₃ catalysts with different K loadings (0.3, 0.5, and 1.0 wt%) were prepared using the impregnation method. The dataset contains the physical, chemical, and catalytic performance data of the catalysts with different K loadings.Data Processing StepsCatalyst Preparation: The dataset records the process of loading K onto the Al₂O₃ surface using potassium acetate (CH₃COOK) as the K precursor. The precursor was dissolved in ethanol, and after ultrasonic treatment, drying, and calcination, catalysts with different K loadings were obtained.Catalyst Characterization: The physical and chemical properties of the catalysts were analyzed using various characterization techniques, including X-ray powder diffraction (XRD), nitrogen adsorption-desorption, Fourier transform infrared spectroscopy (FT-IR), hydrogen temperature-programmed reduction (H₂-TPR), ammonia temperature-programmed desorption (NH₃-TPD), and X-ray photoelectron spectroscopy (XPS) to evaluate the catalyst structure, surface properties, and interactions with metal active sites.Catalytic Performance Testing: The catalytic performance of the catalysts was tested in a fixed-bed tubular reactor for propane dehydrogenation, recording the propane conversion and propene selectivity at 600°C.Data Content and Time/Space InformationTime: The dataset records the catalytic performance of the catalysts under different reaction conditions, especially in the propane dehydrogenation reaction. The time span of the data covers the preparation, characterization, and performance testing of the catalysts.Spatial Resolution: The physical properties of the catalysts, such as surface area and pore size, were measured using nitrogen adsorption-desorption; the particle size and metal dispersion were analyzed by transmission electron microscopy (TEM).Data Table Content and Measurement UnitsThe dataset includes tables of catalyst loadings (such as Pt, Sn, and K mass fractions), propane conversion, propene selectivity, and thermogravimetric analysis data. The measurement units used in the tables include mass fraction (wt%), temperature (°C), pressure (MPa), and reaction time (hours).