Ni-MgO-Al2O3 catalysts were developed for ICCU-DRM. Ni is active for dry reforming methane, and MgO and Al2O3 are common supports. The methods are reported by Kim et al. (https://doi.org/10.1021/acscatal.7b03063), as below:
“A Ni-based catalyst derived from a hydrotalcite precursor, Ni/MgO-Al2O3, was prepared via coprecipitation. First, Ni(NO3)2·6H2O, Mg(NO3)2·6H2O, and Al(NO3)3·9H2O, where the molar ratio Ni:Mg:Al was 8.0:58.7:33.3, were dissolved in 100 mL of water (reverse osmosis, 15 MΩ·cm) to obtain a 1 M solution that subsequently was added dropwise to 100 mL of an aqueous solution of Na2CO3 (0.2 M). The pH of the mixture was adjusted to 10 ± 0.5 using 2.0 M NaOH. The resulting suspension was stirred at room temperature for 24 h. The precipitate was filtered and washed with DI water until the electrical conductivity of the filtrate was lower than 100 μS/cm. The material was dried overnight at 100 °C and calcined at 800 °C for 5 h using a heating rate of 5 °C/min. The calcined catalyst was ground and sieved to 300–500 μm.”
The prepared catalysts were mixed with sorbent physically to form dual functional materials (or combined materials).