data of research

Raman spectra of coal char at different temperatures (collection range 1000-2000cm⁻¹)；Variation curves of CO₂ conversion rate and volume fraction of product gas (CO, H₂) at different temperatures; Time-series table of coal char conversion rate with reaction time (isothermal 750/800/850℃, continuous reaction for 30min); Atmosphere: Pure CO₂ (flow rate 50mL/min), maintain atmospheric pressure; Temperature program: Room temperature to 800℃ (heating rate 10℃/min), Parameters: Laser wavelength 532nm, power 5mW (to avoid coal char thermal decomposition).