New Hybrid Materials for Improved Hydrogen Production by the Sorption‐Enhanced Steam Reforming of Butanol

Abstract

Catalytically assisted steam reforming coupled with the selective separation of the produced CO2 is a promising approach for improved H2 production. In this work, we synthesized a new mixture (K‐Ni‐CaO/HTlc) of two potential sorbents CaO and hydrotalcite (HTlc), the promoter K, and the reforming catalyst Ni. This hybrid material was tested for the sorption‐enhanced steam reforming of butanol (SESRB) and its performance was compared to that of two unpromoted hybrid materials Ni‐CaO/HTlc and Ni‐CaO/Al2O3. All these hybrid materials were able to produce high‐purity H2. In particular, K‐Ni‐CaO/HTlc exhibited the highest H2 concentration (98.7 mol %) and adsorption capacity (12.8 mol CO2 kgsorbent−1) at 823 K. The cyclic durability was tested for 25 cycles, and K‐Ni‐CaO/HTlc was stable for up to 21 cycles. Conversely, Ni‐CaO/HTlc and Ni‐CaO/Al2O3 remained stable for 15 and 11 cycles only. The addition of K as a promoter was justified by the improved H2 production and multicycle resilience. Finally, a plausible reaction mechanism for SESRB that predominates over the investigated hybrid materials was suggested.

Sorption‐Enhanced Steam Reforming of Ethylene Glycol over Dual Functional Hydrotalcite Materials Promoted with Pt and Ru

“…These results in terms of H 2 yield are represented in Figure . As expected, lower GHSV corresponding to higher weight of the material favoured H 2 production ,. The H 2 yield was maximized at GHSV of 3000 mL g −1 h −1 for all the hybrid materials.…”

“…These layered double hydroxides can be easily altered, to enhance their adsorption capacity, thereby improving H 2 productivity. Not surprisingly, such modified HTlc‐based hybrid materials were successfully employed in SER of several bio‐based feedstocks ,…”

Hydrogen Production from the Carbon Dioxide Sorption-Enhanced Steam Reforming of Biogas Over a Ni-Based Hybrid Material with a Calcium Oxide Sorbent

“…Biogas, which is produced from the anaerobic digestion of municipal and biowastes and sludge, is an alternative feedstock for H 2 production. There is growing interest in biogas reforming to syngas or H 2 , especially due to the large-scale commercial production of biogas and the relatively cheaper availability of CH 4 and CO 2 from biogas. ,, SESR of biofeeds such as glycerol, − ethanol, , butanol, bio-oil, and solid biomass were studied in past works; however, SESR of biogas or sorption-enhanced steam reforming of biogas (SESRB) is scarcely reported. For example, Zhou et al applied a Ni–MgO–CaO material with paper fiber as the template for producing H 2 (purity 94 mol %) from SESRB.…”