Modification of red mud oxygen carrier with leached components from biomass ash for enhanced syngas production via chemical looping gasification

A fixed-bed tube furnace was used for chemical looping gasification tests at an oxygen carrier-to-fuel mass ratio of 1:1, with steam as gasifying agent and N₂ as carrier gas. Concentrations of H₂, CO, CO₂ and CH₄ were monitored by a Gasboard Analyzer 3100, and 5-cycle stability tests were performed. Material characterization was carried out with a Bruker D8 ADVANCE X-ray diffractometer, Micromeritics ASAP 2460 adsorption analyzer and Thermo Scientific ESCALAB 250Xi X-ray photoelectron spectrometer.

Thermodynamic simulation was performed using FactSage software with the FCoxid database.The dataset includes 5 structured tables. Table 1 (1 record) shows ultimate and proximate analysis results of corn cob char, in unit of %. Table 2 (6 records) presents mass fractions (%) of chemical components for raw red mud, CRM and four leachate-modified samples.

Table 3 (1 record) lists the chemical composition of biomass ash (%). Table 4 (1 record) displays element concentrations in biomass ash leachate (mg/L). Table 5 (3 records) provides pore structure parameters of oxygen carriers, including specific surface area (m²·g⁻¹), pore volume (mL·g⁻¹) and average pore size (nm).

Additional data files contain real-time gas evolution curves, raw XRD patterns, XPS spectra, BET adsorption-desorption isotherms and FactSage simulation outputs.No missing data exist in the tabulated datasets. All gasification tests were replicated at least in duplicate, with relative standard deviation below 4% for gas yield and carbon conversion. The CO₂ recovery rate of the gas analysis system was higher than 94%.