Published: Jan. 1, 2023

Steam reforming of tar (SRT) is considered a cost-effective technology for H2 production. Herein, we used acid pretreatment to develop oxygen vacancies (Ov) on the surface Al2O3 (H-Al) and successfully prepared Ni-Ca/H-Al catalysts. Among all catalysts, sol-gel sol-2Ca/H-Al catalyst exhibited highest production capacity (152.74 mmol/g-tar, higher than existing reports) when CO2 was only 22.11 mmol/g-tar. The Ov, dispersion, strong basicity, largest specific area sol-Ni-2Ca/H-Al were determined by characterizations. interaction CaO NiO facilitated formation which dispersion anchoring adsorption activation CO2. Py-GC/MS results showed complete change in complex type pyrolysis volatiles with increasing temperature, producing more light aromatics. had excellent deoxidation ability effectively promoted breakage C-C bonds furans, benzene ring branches, C-O aliphatic hydrocarbons. Furthermore, LHVsyn, structural relationships, reusability, resistance carbon deposition described. high conversion (90.96%) yield (146.27 mmol/g-tar) without treatment at least 8 cycles. Interestingly, reached 151.58 mmol/g-tar simple regeneration sol-Ni-2Ca/H-Al. These provide theoretical basis efficient steam preparation.

Language: Английский