Effect of progressive Co loading on commercial Co–Mo/Al2O3 catalyst for natural gas decomposition to COx-free hydrogen production and carbon nanotubes

Abstract: A growing interest in hydrogen use has been observed due to its environmentally friendlycharacteristics. However, the current methods of hydrogen production from natural gas are based on steammethane reforming, partial oxidation, and autothermal reforming. These processes produce a mixture ofhydrogen and carbon oxides and after water-gas shift reactions, in order to increase the production ofhydrogen, a large amount of CO2 is generated and possibly released in the atmosphere. In this context, thecatalytic methane decomposition has been receiving attention as an alternative route to the production ofCOx-free hydrogen. It has been reported that the appropriate group of catalysts and reactors can lead to aviable process. Current investigations attempt to increase the yield of hydrogen. The present work aims toevaluate the processes currently used for that and to present the preliminary results obtained with cobaltcatalysts for methane decomposition. A comparison between the conventional processes and the suggestedones is made, and the major advantages in the use of methane decomposition are presented.

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Implication of iron nitride species to enhance the catalytic activity and stability of carbon nanotubes supported Fe catalysts for carbon-free hydrogen production via low-temperature ammonia decomposition

Catalysis Science & Technology ◽

10.1039/c7cy02270k ◽

2018 ◽

Vol 8 (3) ◽

pp. 907-915 ◽

Cited By ~ 16

Author(s):

Hui Zhang ◽

Qinmei Gong ◽

Shan Ren ◽

Mahmood Ali Arshid ◽

Wei Chu ◽

...

Keyword(s):

Carbon Nanotubes ◽

Catalytic Activity ◽

Low Temperature ◽

Hydrogen Production ◽

Ammonia Decomposition ◽

Iron Nitride ◽

Wet Impregnation ◽

Free Hydrogen ◽

Fe Catalysts

This study prepared the Fe2N/CNTs catalysts by using wet-impregnation and followed by nitrogenization, for carbon-free hydrogen production from NH3 decomposition.

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Various nickel doping in commercial Ni–Mo/Al2O3 as catalysts for natural gas decomposition to COx-free hydrogen production

Renewable Energy ◽

10.1016/j.renene.2013.02.024 ◽

2013 ◽

Vol 57 ◽

pp. 671-678 ◽

Cited By ~ 59

Author(s):

Ahmed E. Awadallah ◽

Ateyya A. Aboul-Enein ◽

Ahmed K. Aboul-Gheit

Keyword(s):

Hydrogen Production ◽

Natural Gas ◽

Nickel Doping ◽

Free Hydrogen

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Low-Temperature Steam Reforming of Natural Gas after LPG-Enrichment with MFI Membranes

Processes ◽

10.3390/pr6120263 ◽

2018 ◽

Vol 6 (12) ◽

pp. 263 ◽

Cited By ~ 2

Author(s):

Dominik Seeburg ◽

Dongjing Liu ◽

Radostina Dragomirova ◽

Hanan Atia ◽

Marga-Martina Pohl ◽

...

Keyword(s):

Low Temperature ◽

Hydrogen Production ◽

Natural Gas ◽

Steam Reforming ◽

Hydrogen Release ◽

Absolute Pressure ◽

Side Reactions ◽

Catalyst Precursor ◽

Ongoing Research ◽

Al2o3 Catalyst

Low-temperature hydrogen production from natural gas via steam reforming requires novel processing concepts as well as stable catalysts. A process using zeolite membranes of the type MFI (Mobile FIve) was used to enrich natural gas with liquefied petroleum gas (LPG) alkanes (in particular, propane and n-butane), in order to improve the hydrogen production from this mixture at a reduced temperature. For this purpose, a catalyst precursor based on Rh single-sites (1 mol% Rh) on alumina was transformed in situ to a Rh1/Al2O3 catalyst possessing better performance capabilities compared with commercial catalysts. A wet raw natural gas (57.6 vol% CH4) was fully reformed at 650 °C, with 1 bar absolute pressure over the Rh1/Al2O3 at a steam to carbon ratio S/C = 4, yielding 74.7% H2. However, at 350 °C only 21 vol% H2 was obtained under these conditions. The second mixture, enriched with LPG, was obtained from the raw gas after the membrane process and contained only 25.2 vol% CH4. From this second mixture, 47 vol% H2 was generated at 350 °C after steam reforming over the Rh1/Al2O3 catalyst at S/C = 4. At S/C = 1 conversion was suppressed for both gas mixtures. Single alkane reforming of C2–C4 showed different sensitivity for side reactions, e.g., methanation between 350 and 650 °C. These results contribute to ongoing research in the field of low-temperature hydrogen release from natural gas alkanes for fuel cell applications as well as for pre-reforming processes.

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Catalytic decomposition of natural gas for COx-free hydrogen production in a structured multilayer reactor

Applied Catalysis A General ◽

10.1016/j.apcata.2009.01.004 ◽

2009 ◽

Vol 357 (1) ◽

pp. 58-65 ◽

Cited By ~ 15

Author(s):

G. Italiano ◽

C. Espro ◽

F. Arena ◽

F. Frusteri ◽

A. Parmaliana

Keyword(s):

Hydrogen Production ◽

Natural Gas ◽

Catalytic Decomposition ◽

Free Hydrogen

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COx-free hydrogen production via ammonia decomposition over mesoporous Co/Al2O3 catalysts with highly dispersed Co species synthesized by a facile method

Dalton Transactions ◽

10.1039/d0dt03262j ◽

2021 ◽

Author(s):

Yingqiu Gu ◽

Di Xu ◽

Yun Huang ◽

Zhouyang Long ◽

Guojian Chen

Keyword(s):

Fuel Cells ◽

Hydrogen Production ◽

Transition Metal ◽

Transition Metals ◽

Ammonia Decomposition ◽

Metal Catalyst ◽

Facile Synthesis ◽

Transition Metal Catalyst ◽

Highly Dispersed ◽

Free Hydrogen

Transition metals have been considered as potential catalysts for ammonia decomposition to produce COx-free hydrogen for fuel cells. However, the facile synthesis of transition metal catalyst with small size active...

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