Production of hydrogen by steam reforming of ethanol over cobalt and nickel catalysts supported on perovskite-type oxides

2008 ◽  
Vol 9 (5) ◽  
pp. 600-604 ◽  
Author(s):  
Kohei Urasaki ◽  
Kazuhisa Tokunaga ◽  
Yasushi Sekine ◽  
Masahiko Matsukata ◽  
Eiichi Kikuchi
Keyword(s):  
Steam Reforming ◽  
Nickel Catalysts ◽  
Steam Reforming Of Ethanol ◽  
Production Of Hydrogen ◽  
Perovskite Type ◽  
Cobalt And Nickel

Hydrogen Production by Steam Reforming of Ethanol Using Cobalt and Nickel Catalysts Supported on Strontium Titanate

2005 ◽  
Vol 34 (5) ◽  
pp. 668-669 ◽  
Author(s):  
Kohei Urasaki ◽  
Kazuhisa Tokunaga ◽  
Yasushi Sekine ◽  
Eiichi Kikuchi ◽  
Masahiko Matsukata
Keyword(s):  
Hydrogen Production ◽  
Strontium Titanate ◽  
Steam Reforming ◽  
Nickel Catalysts ◽  
Steam Reforming Of Ethanol ◽  
Cobalt And Nickel

scholarly journals Sustainable Production of Hydrogen by Steam Reforming of Ethanol Using Cobalt Supported on Nanoporous Zeolitic Material

Nanomaterials ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 1934
Author(s):  
Javier Francisco da Costa-Serra ◽  
Maria Teresa Navarro ◽  
Fernando Rey ◽  
Antonio Chica
Keyword(s):  
Steam Reforming ◽  
Zeolite Y ◽  
Cobalt Catalysts ◽  
Coke Deposition ◽  
Bet Surface Area ◽  
Ethanol Conversion ◽  
Y Zeolite ◽  
Steam Reforming Of Ethanol ◽  
Production Of Hydrogen ◽  
Hydrogen Selectivity

Cobalt catalysts supported on Y zeolite and mesoporized Y zeolite (Y-mod) have been studied in steam reforming of ethanol (SRE). Specifically, the effect of the mesoporosity and the acidity of the y zeolite as a support has been explored. Mesoporous were generated on Y zeolite by treatment with NH4F and the acidity was neutralized by Na incorporation. Four cobalt catalysts supported on Y zeolite have been prepared, two using Y zeolite without mesoporous (Co/Y, Co/Y-Na), and two using Y zeolite with mesoporous (Co/Y-mod and Co/Y-mod-Na). All catalysts showed a high activity, with ethanol conversion values close to 100%. The main differences were found in the distribution of the reaction products. Co/Y and Co/Y-mod catalysts showed high selectivity to ethylene and low hydrogen production, which was explained by their high acidity. On the contrary, neutralization of the acid sites could explain the higher hydrogen selectivity and the lower ethylene yields exhibited by the Co/Y-Na and Co/Y-mod-Na. In addition, the physicochemical characterization of these catalysts by XRD, BET surface area, temperature-programmed reduction (TPR), and TEM allowed to connect the presence of mesoporous with the formation of metallic cobalt particles with small size, high dispersion, and with high interaction with the zeolitic support, explaining the high reforming activity exhibited by the co/y-mod-Na sample as well as its higher hydrogen selectivity. It has been also observed that the formation of coke is affected by the presence of mesoporous and acidity. Both properties seem to have an opposite effect on the reforming catalyst, decreasing and increasing the coke deposition, respectively.

scholarly journals Synthesis and Characterization of Co/Ni/CoNi-ZSM-5 Catalyst for Hydrogen Production

2018 ◽  
Vol 156 ◽  
pp. 06013
Author(s):  
Widayat Widayat ◽  
Arianti Nuur Annisa ◽  
Hantoro Satriadi ◽  
Syaiful Syaiful
Keyword(s):  
Hydrogen Production ◽  
Steam Reforming ◽  
Hydrothermal Process ◽  
Coke Formation ◽  
Nickel Catalysts ◽  
Catalyst Synthesis ◽  
Cobalt Nickel ◽  
Crystalline Product ◽  
Production Of Hydrogen

Nickel is commonly used as a catalyst in hydrogen production. However, the use of nickel catalysts in the steam reforming process has the disadvantage of coke formation and high cost. Therefore, in this research, Ni/ZSM-5 catalyst synthesis was used to reduce production cost and an addition of cobalt (Co) metal to avoid coke formation. The method consists of a synthesis of ZSM-5 catalyst using hydrothermal process. Furthermore, the crystalline product was impregnated with the metal cobalt, nickel and combination of cobalt-nickel as much as 2% by weight metal/weight of the catalyst. Then the XRD and EDX characterization of Co/ZSM-5, Ni/ZSM-5, and CoNi/ZSM-5 was done followed by catalytic testing in the production of hydrogen from glycerol using steam reforming process. From XRD characterization results showed that Co/ZSM-5 catalyst has a crystallinity of 78.69%, Ni/ZSM-5 catalyst has 70.04% crystallinity and CoNi/ZSM-5 catalyst has 76.99% crystallinity. Catalytic testing on hydrogen production showed that CoNi/ZSM-5 catalyst produced the highest hydrogen concentration of 1,756.33 ppm while Ni/ZSM-5 catalyst produces 1,240 ppm and Co/ZSM-5 catalyst produces 491 ppm.

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