The performance of Ni/delta-Al2O3 catalyst in propane autothermal reforming (ATR) for hydrogen production was investigated in the present study. The catalysts were characterized using XRD, TEM, and SEM. The activity of the Ni/delta-Al2O3 catalyst manufactured by the water-alcohol method was better than those of the catalysts manufactured by the impregnation and chemical reduction methods. The Ni/delta-Al2O3 catalysts were modified by the addition of promoters such as Mg, La, Ce, and Co, in order to improve their stability and yield. Hydrogen production was the largest for the Ni-Co-CeO2/Al2O3, catalyst.
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http://dx.doi.org/10.1166/jnn.2006.019 | DOI Listing |
Environ Sci Pollut Res Int
July 2024
School of Applied Management, Rajiv Gandhi Proudyogiki Vishwavidyalaya, Bhopal, 462033, India.
In a hydrogen economy, the primary energy source for industry, transportation, and power production is hydrogen gas. Green hydrogen can be generated and utilized in an environmentally friendly and sustainable manner; it seeks to displace fossil fuels. Finding a clean alternative energy source is becoming more crucial due to the depletion of fossil fuels and the major environmental pollution issues they bring when utilized extensively.
View Article and Find Full Text PDFEnviron Sci Pollut Res Int
June 2024
Department of Chemical Sciences, Faculty of Science and Computing, Pen Resource University, P.M.B 0198, Gombe, Gombe State, Nigeria.
The current work investigated emerging fields for generating and consuming hydrogen and synthetic Fischer-Tropsch (FT) fuels, especially from detrimental greenhouse gases, CO and CH. Technologies for syngas generation ranging from partial oxidation, auto-thermal, dry, photothermal and wet or steam reforming of methane were adequately reviewed alongside biomass valorisation for hydrogen generation, water electrolysis and climate challenges due to methane flaring, production, storage, transportation, challenges and opportunities in CO and CH utilisation. Under the same conditions, dry reforming produces more coke than steam reforming.
View Article and Find Full Text PDFMaterials (Basel)
May 2024
College of Environmental Science and Engineering, Beijing University of Technology, Beijing 100124, China.
The x%Ni/SmO-MnO (x = 0, 10, 15, 20) catalysts derived from SmMnO mullite were prepared by solution combustion and impregnation method; auto-thermal reforming (ATR) of acetic acid (HAc) for hydrogen production was used to explore the metal-support effect induced by Ni loadings on the catalytic reforming activity and product distribution. The 15%Ni/SmO-MnO catalyst exhibited optimal catalytic performance, which can be due to the appropriate Ni loading inducing a strong metal-support interaction to form a stable Ni/SmO-MnO active center, while side reactions, such as methanation and ketonization, were well suppressed. According to characterizations, SmO-MnO mixed oxides derived from SmMnO mullite were formed with oxygen vacancies; nevertheless, loading of Ni metal further promoted the formation of oxygen vacancies, thus enhancing adsorption and activation of oxygen-containing intermediate species and resulting in higher reactivity with HAc conversion near 100% and hydrogen yield at 2.
View Article and Find Full Text PDFChemSusChem
October 2024
Department of Chemical Engineering, University of the Basque Country UPV/EHU, P.O. Box 644, E48080, Bilbao, Spain.
This study evaluates the potential of several biomasses differing in nature and composition for their valorization by pyrolysis and in line oxidative steam reforming. The first task involved the fast pyrolysis of the biomasses in a conical spouted bed reactor (CSBR) at 500 °C, in which product yields were analyzed in detail. Then, the oxidative steam reforming (OSR) of pyrolysis volatiles (gases and bio-oil) was approached in a fluidized bed reactor (FBR).
View Article and Find Full Text PDFACS Appl Mater Interfaces
March 2024
School of Chemistry and Molecular Bioscience, Molecular Horizons, University of Wollongong, Wollongong, NSW 2500, Australia.
Hydrogen production from organic waste by gasification and reforming technologies offers major benefits to both the environment and climate. The long-term stability and regeneration of the reforming catalyst are still the biggest challenges because of carbon deposition. Here we report a recyclable salt-supported nickel oxide NiO/NaX (X: F, Cl, Br) catalyst for effective autothermal reforming of the oxygenated volatile organic compound (OVOC) ethyl acetate to hydrogen.
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