Methane decomposition over Fe supported catalysts for hydrogen and nano carbon yield

Abstract

Production of hydrogen, being an environmentally friendly energy source, has gained a lot of attention in the recent years. In this article, iron-based catalysts, with different active metal loadings, supported over magnesia and titania are investigated for hydrogen production via catalytic decomposition of methane. The catalytic activity and stability results revealed that magnesia supported catalysts performed better than titania supported catalysts. Hydrogen reduction temperature of 500°C was obtained suitable for catalyst activation. For magnesia supported catalysts, only higher loadings i.e., 30% and 40% Fe-Mg catalysts showed reasonable activity, while all titania supported catalysts presented less activity as well as deactivation. Among all the catalysts, 30% Fe/MgO catalyst displayed better activity. The formation of carbon nanofibers was evidenced from morphological analysis. FESEM and TEM images showed the generation of nonuniform carbon nanofibers with broader diameter. The catalysts were characterized using different techniques such as BET, H2-TPR, O2-TPO, XRD, TGA, FESEM and TEM.

Methane conversion for hydrogen production: technologies for a sustainable future

“…101 Henceforth, it is not strange that they obtain a huge attraction for important applications like catalysts, 130 electrodes, 102 fuel cells 103 and electrical devices. 104 Many researchers 105,106 investigated CDM to form carbon nanotubes over iron catalysts. Zhou et al 29 presented a model of carbon deposition (Fig.…”

Fe catalysts for methane decomposition to produce hydrogen and carbon nano materials

“…CaO-Fe had 1.7gc/gcat carbon deposit, whereas MgO-Fe showed 23.2 gc/gcat. A.H. Fakeeha et al [57] reported that the H2 yield was 45% over MgO supported Fe catalyst (30% Fe loading), whereas TiO2 supported same loading Fe catalyst exhibited only 5% H2 yield. A.A. Ibrahim et al [58] investigated the influence of support type in CMD over Fe catalyst, and concluded that Fe/TiO2 was inappropriate for CMD compared to Fe/Al2O3 and Fe/MgO.…”

H2 Production from Catalytic Methane Decomposition Using Fe/x-ZrO2 and Fe-Ni/(x-ZrO2) (x = 0, La2O3, WO3) Catalysts

“…Carbon Yield (g C/gcat) Space Velocity (mLg −1 h −1 ) Reaction Temperature (°C ) Reference 30%Fe/MgO 5.5 5000 700 [29] 70%Ni-10%Cu-10%Fe/Al2O3 8 2867 700 [33] 50Fe-6Co-Al2O3 41.0 45,000 675 [34] 62Fe-8Ni-Al2O3 122.0 45,000 675 [34] NiO-Al2O3 88 900,000 500 [35] 20%Fe/WO3 + ZrO2 0.58 4000 800 Present work Fakeeha et al [25], studied hydrogen and carbon yield in methane decomposition over Fe supported on MgO and TiO2. In their research, magnesia-supported Fe gave better activity at high Fe loading of about 30-40%.…”