The sorption-enhanced reforming process (or SERP), which combines steam reforming and in situ carbon dioxide (CO 2 ) capture by adsorption, is a candidate technique for improved hydrogen (H 2 ) production. In the present work, the performance of hybrid materials comprising a Ni-based reforming catalyst and hydrotalcite-(Ni-HTc or HM1) or calcium-based sorbents (Ni-CaO/Al 2 O 3 or HM2) for sorption-enhanced steam methane reforming was compared. It was found that such labmade hybrid materials exhibit superior adsorption characteristics and longer breakthrough times than powdered mixtures of commercial Ni/Al 2 O 3 catalyst and the respective sorbent (HTc or CaO). H 2 -rich gas (98.5 and 97.9%) was obtained using the investigated hybrid materials HM1 and HM2 for SERP. The influence of reaction variables such as temperature, steam/carbon ratio, and gas hourly space velocity on methane conversion and product gas composition was investigated. Stability tests for both the hybrid materials were performed for 20 cycles. Hydrotalcite-based hybrid material HM1 adsorbed up to 1.1 mol CO 2 /kg sorbent at 673 K and was stable for 16 cycles. Conversely, the calcium-based hybrid material HM2 showed an adsorption capacity of 12.3 mol of CO 2 /kg sorbent at 823 K and remained stable up to 11 cycles.

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Sorption‐enhanced steam reforming of glycerol (SESRG) is a promising method for the sustainable production of hydrogen (H2). In this work, composites of Ni and cationic‐modified hydrotalcite (HTlc) were promoted with Pt, thus resulting in two novel hybrid materials Pt‐NiMgHTlc and Pt‐NiCuHTlc. Activity trials for SESRG were performed in a fixed‐bed reactor in the range 673–873 K and it was found that the promotion with Pt improved H2 purity and multi‐cycle durability. The best results were achieved when Pt‐NiCuHTlc was employed at T=823 K: a H2 concentration of 98.7 mol % and adsorption capacity of 1.34 mol CO2/kg sorbent was achieved. When the multi‐cycle performance was tested for 20 cycles, it was found that NiMgHTlc, NiCuHTlc, Pt‐NiMgHTlc, and Pt‐NiCuHTlc were stable for 5, 8, 13, and 18 cycles. Finally, a likely reaction pathway for SESRG over the investigated multifunctional materials was proposed.

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