Carbon dioxide conversion into methanol represents a technologically relevant approach to treating CO₂ as a carbon-containing raw material rather than only as an emission stream. This study evaluates the elemental composition of a laboratory-prepared H-S-1 (hollow silicalite-1) support intended for subsequent Cu–ZnOₓ loading and CO₂ hydrogenation to methanol, with emphasis on material purity and resource-efficient catalyst development. According to the supplied laboratory regulation, S-1 is selectively recrystallized in 0.30 M tetrapropylammonium hydroxide at 170 °C for 72 h, followed by washing, drying and calcination. X-ray fluorescence analysis using a Rigaku NEX CG instrument showed 90.3 mass% SiO₂ and 0.883 mass% Al₂O₃, corresponding to a SiO₂/Al₂O₃ molar ratio of about 173.5 and an atomic Si/Al ratio of about 86.8. Minor components included SO₃ (1.09 mass%), ZrO₂ (0.103 mass%), Fe₂O₃ (0.0845 mass%) and TiO₂ (0.0703 mass%), while NiO, CuO and ZnO were present only at trace levels. The high-silica composition supports further evaluation of H-S-1 as a low-acidity carrier. However, sodium was not reported and must be quantified separately, while XRD and TEM/STEM are required to confirm MFI crystallinity and hollow morphology. The present results establish a chemical-quality checkpoint for an environmental technology aimed at CO₂ utilization; catalytic carbon conversion, energy demand and life-cycle environmental benefits remain subjects for subsequent study.