Conventional steam reforming for hydrogen production is limited by the thermodynamic equilibrium. To address this limitation

in this study

a cost-effective catalyst-sorbent hybrid material was synthesized from waste steel slag and limestone. A 30-cycle CO

2

sorption experiment and a sorption-enhanced biomass reforming for hydrogen production experiment were conducted. The results indicate that for the A

4

L

3

S

2

(4 mol·L

-1

acid

limestone: slag = 3:2) composite

it attains a total CO

2

sorption capacity of 4.14 g·g

-1

under mild conditions

with only a 23.5% reduction after 30 cycles. Moreover

under severe conditions

it manages to retain 3.81 g·g

-1

in total 30 cycle. When applied to sorption-enhanced biomass gasification using pine wood shavings

the material significantly boosts hydrogen production

achieving a hydrogen purity of 74.57% and a yield of 0.818 mmol·g·g

-1

·min

-1

while reducing the CO

2

concentration in the syngas to 10.89%. These findings highlight the dual functionality and robustness of the steel slag-derived material

offering a cost-efficient and environmentally sustainable pathway for industrial hydrogen production and valorization of solid waste resources.