XRD, XRF, and BET Analysis Results for POFA

The physicochemical properties of Palm Oil Fuel Ash (POFA) were characterized to assess its suitability as a catalyst precursor. The dataset includes structural, compositional, and textural information obtained from X-ray diffraction (XRD), X-ray fluorescence (XRF), and nitrogen adsorption–desorption analyses. XRD was used to identify crystalline phases and evaluate structural changes after pre-treatment and sulfonation. XRF analysis determined the elemental composition, reported as weight percentages (wt%) of the corresponding oxides. The specific surface area was calculated using the Brunauer–Emmett–Teller (BET) method, while pore size distribution and pore volume were obtained using the Barrett–Joyner–Halenda (BJH) method. These parameters are expressed as surface area (m²/g), pore volume (cm³/g), and pore diameter (nm). The dataset enables evaluation of compositional and structural modifications of POFA and supports interpretation of its performance as a heterogeneous solid acid catalyst.