Energy

Catalytic steam reforming; Gasification; High-entropy oxide; Waste corrugated cardboard; Hydrogen energy

Enhancement of syngas production and improvement of hydrogen distribution are essential issues for the conversion of solid waste to energy via the gasification process. Recently, high-entropy oxides (HEO) have garnered widespread attention due to their impressive performance in thermochemical conversion. In this study, a spinel-structured HEO (FeCoNiCrMn)3O4 was synthesized and used for enhanced hydrogen production via catalytic reforming of volatiles derived from gasification of waste corrugated cardboard (WCC). The experiments were conducted on a two-stage fixed-bed reactor. In the 1st stage of gasification, the optimal reaction conditions with full utilization of volatiles were identified as a temperature of 900°C and a steam flow rate of 0.24 g/min, at which a H2 yield of 18.93 mmol/g was observed. In the 2nd stage of catalytic reforming at 800°C, superior performance of the HEO catalyst versus the NiFe2O4 catalyst was observed, with H2 yield of 31.29 mmol/g and H2 selectivity of 92.29%. The HEO catalyst performed consistently over 10 cycles, with no significant decrease observed in syngas distribution, higher heating value, or carbon conversion rate, which reveals excellent structural stability and regenerability of HEO. Favorable performance of HEO is attributed to the synergistic effect of multiple metal elements, which improves active sites distribution, enhances oxygen vacancy, and strengthens the stability, thus upgrading the ring-breaking ability for benzenes. This work validated the superior performance of HEO in enhanced hydrogen production via catalytic reforming of volatiles derived from gasification of WCC, and offered an application demonstration of HEO in the energy conversion of solid wastes.

Ludi Wang

Qingbin Song

Yi Li,Liujie Xu,Zhipeng Tian,Gongming Xin,Ning Qin,Chao Wang,Ming Zhao

Journal paper

142044

361

142044

No

2026-07

EI、SCI