Turning glycerol surplus into renewable syngas through glycerol steam reforming over a sol-gel Ni–Mo2C-Al2O3 catalyst

Barreto, Rafael Dei Tós; Ramos, Luiz Pereira; Jorge, Regina Maria Matos; Jorge, L. M. M.

doi:10.1016/j.ijhydene.2023.01.166

Cited by 6 publications

(2 citation statements)

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“…However, the fluid catalytic cracking process and the steam-reforming of natural gas are the main origins of hydrogen production; these are nonrenewable processes from a feedstock point of view [2]. As the main byproduct from the biodiesel production process (approximately 1 ton of glycerol/10 tons of biodiesel), glycerol been considered as a prospective green feedstock for hydrogen production, owing to its relatively high hydrogen content, nontoxicity, and ease of storage and employment [3][4][5]. Scientists have explored and developed different types of hydrogen production technology from crude glycerol, mainly including steam-reforming, supercritical water phase-reforming, aqueous phase-reforming, and the autothermal partial oxidation of glycerol, etc [6,7].…”

Section: Introductionmentioning

confidence: 99%

“…Scientists have explored and developed different types of hydrogen production technology from crude glycerol, mainly including steam-reforming, supercritical water phase-reforming, aqueous phase-reforming, and the autothermal partial oxidation of glycerol, etc [6,7]. Due to its high theoretical hydrogen production and good industrial application prospects, steam-reforming of glycerol (GSR) is considered to be the best prospective hydrogen production process, and has been rapidly researched and developed [3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

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Catalytic Steam-Reforming of Glycerol over LDHs-Derived Ni-Al Nanosheet Array Catalysts for Stable Hydrogen Production

et al. 2023

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In the present work, LDHs–derived Ni–Al nanosheet arrays (NiAl/NA) were successfully synthesized via a one–step hydrothermal method, and applied in the steam-reforming of glycerol reaction for enhanced and stable hydrogen production. The physicochemical properties of catalysts were characterized using various techniques, including XRD, SEM–EDS, XPS, N2–physisorption, Raman, and TG–DTG. The results indicate that smooth and cross–linked Ni–Al mixed metal oxide nanosheets were orderly and perpendicularly grown on the Ni foam substrate. The SEM line scan characterization reveals the metal concentration gradient from the bottom to the top of nanosheet, which leads to distinctly optimized Ni valence states and an optimized binding strength to oxygen species. Owing to the improved reducibility and more exposed active sites afforded by its array structures, the NiAl/NA catalyst shows enhanced glycerol conversion (83.1%) and a higher H2 yield (85.4%), as well as longer stability (1000 min), compared to the traditional Ni–Al nanosheet powder. According to the characterization results of spent catalysts and to density functional theory (DFT) calculations, coke deposition is effectively suppressed via array construction, with only 1.25 wt.% of amorphous carbons formed on NiAl/NA catalyst via CO disproportionation.

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