Investigation of the Inhibiting Role of Hydrogen in the Steam Reforming of Methanol

One dimensional (1-D) and three dimensional (3-D) ZnO were growth by a hydrothermal method. ZnO 1-D was employed as a support for silver nanoparticles in order to design a new catalyst and used on the steam reforming of methanol (SRM) reaction for H2 production. The catalytic activity of the Ag/ZnO sample with low content of Ag showed better performance on the SRM reaction than on high silver loading catalyst. So, the sample with small Ag particle size showed best performance in methanol conversion than catalyst with big Ag particle size, this finding could be attributed to the high ZnO/Ag ratio. According to results of SEM and TEM techniques the catalytic activity: methanol conversion, H2 and low CO production observed on the Ag/ZnO 1-D catalyst occurs in the edge sites rather than the rim sites. The role of Ag is to accept the hydrogen to be released to the gas phase. In addition, the 1.5Ag/ZnO 1-D catalyst showed good stability during the reaction.

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Steam reforming of methanol over Cu/CeO2/ZrO2 catalysts

Applied Catalysis A General ◽

10.1016/j.apcata.2004.11.014 ◽

2005 ◽

Vol 281 (1-2) ◽

pp. 69-73 ◽

Cited By ~ 93

Author(s):

Hisayuki Oguchi ◽

Toshiya Nishiguchi ◽

Tomoaki Matsumoto ◽

Hiroyoshi Kanai ◽

Kazunori Utani ◽

...

Keyword(s):

Steam Reforming ◽

Steam Reforming Of Methanol

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Silica Sol-Gel Supported Nickel Nano-Catalyst for Hydrogen Production Using Microreactors

MRS Proceedings ◽

10.1557/proc-0885-a10-09 ◽

2005 ◽

Vol 885 ◽

Author(s):

Krithi Shetty ◽

Shihuai Zhao ◽

Wei Cao ◽

Naidu V. Seetala ◽

Debasish Kuila

Keyword(s):

Steam Reforming ◽

Average Pore Size ◽

Sol Gel ◽

Supported Catalyst ◽

Silica Sol ◽

Average Pore ◽

Steam Reforming Of Methanol ◽

Nano Catalyst ◽

Before And After ◽

Reforming Reactions

ABSTRACTThe goal of this research is to investigate the activities of a non-noble nano-catalyst (Ni/SiO2) using Si-microreactors for steam reforming of methanol to produce hydrogen for fuel cells. The supported catalyst was synthesized by sol-gel method using Ni (II) salts and Si(C2H5O)4 as starting materials. EDX results indicate that the actual loading of Ni (5-6%) is lower than the intended loading of 12 %. The specific surface area of the silica sol-gel encapsulated Ni nano-catalyst is 452 m2/g with an average pore size of ∼ 3 nm. Steam reforming reactions have been carried out in a microreactor with 50 µm channels in the temperature range of 180-240 °C and atmospheric pressure. Results show 53% conversion of methanol with a selectivity of 74 % to hydrogen at 5 l/min and 200 °C. The magnetic properties of the catalysts were performed using a Vibrating Sample Magnetometer (VSM) to study the activity of the catalysts before and after the steam reforming reactions. The VSM results indicate much higher activity in the microreactor compared to macro-reactor and Ni forms non-ferromagnetic species faster in the microreactor.

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Combined steam reforming of methanol over Cu–Mn spinel oxide catalysts

Journal of Catalysis ◽

10.1016/j.jcat.2007.07.025 ◽

2007 ◽

Vol 251 (1) ◽

pp. 7-20 ◽

Cited By ~ 131

Author(s):

J PAPAVASILIOU ◽

G AVGOUROPOULOS ◽

T IOANNIDES

Keyword(s):

Steam Reforming ◽

Oxide Catalysts ◽

Spinel Oxide ◽

Steam Reforming Of Methanol

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A Phenomenological Study on the Synergistic Role of Precious Metals and the Support in the Steam Reforming of Logistic Fuels on Monometal Supported Catalysts

Advances in Materials Science and Engineering ◽

10.1155/2010/681574 ◽

2010 ◽

Vol 2010 ◽

pp. 1-15 ◽

Cited By ~ 3

Author(s):

Abdul-Majeed Azad ◽

Desikan Sundararajan

Keyword(s):

Steam Reforming ◽

High Efficiency ◽

Phenomenological Study ◽

Supported Catalysts ◽

Precious Metals ◽

Sulfur Poisoning ◽

Jet Fuels ◽

Hydrogen Yield ◽

High Hydrogen

Clean power source utilizing vast logistic fuel reserves (jet fuels, diesel, and coal) would be the main driver in the 21st century for high efficiency. Fuel processors are required to convert these fuels into hydrogen-rich reformate for extended periods in the presence of sulfur, and deliver hydrogen with little or no sulfur to the fuel cell stack. However, the jet and other logistic fuels are invariably sulfur-laden. Sulfur poisons and deactivates the reforming catalyst and therefore, to facilitate continuous uninterrupted operation of logistic fuel processors, robust sulfur-tolerant catalysts ought to be developed. New noble metal-supported ceria-based sulfur-tolerant nanocatalysts were developed and thoroughly characterized. In this paper, the performance of single metal-supported catalysts in the steam-reforming of kerosene, with 260 ppm sulfur is highlighted. It was found that ruthenium-based formulation provided an excellent balance between hydrogen production and stability towards sulfur, while palladium-based catalyst exhibited rapid and steady deactivation due to the highest propensity to sulfur poisoning. The rhodium supported system was found to be most attractive in terms of high hydrogen yield and long-term stability. A mechanistic correlation between the role of the nature of the precious metal and the support for generating clean desulfurized -rich reformate is discussed.

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Copper–Alumina Spinel Catalysts for Steam Reforming of Methanol

Chemistry Letters ◽

10.1246/cl.1988.761 ◽

1988 ◽

Vol 17 (5) ◽

pp. 761-764 ◽

Cited By ~ 18

Author(s):

Masahiko Matsukata ◽

Shigeyuki Uemiya ◽

Eiichi Kikuchi

Keyword(s):

Steam Reforming ◽

Steam Reforming Of Methanol ◽

Spinel Catalysts

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Synthesis of CuO/ZnO/Al2O3/ZrO2/CeO2 nanocatalysts via homogeneous precipitation and combustion methods used in methanol steam reforming for fuel cell grade hydrogen production

RSC Advances ◽

10.1039/c6ra03858a ◽

2016 ◽

Vol 6 (62) ◽

pp. 57199-57209 ◽

Cited By ~ 23

Author(s):

Saeed Khajeh Talkhoncheh ◽

Mohammad Haghighi ◽

Shahab Minaei ◽

Hossein Ajamein ◽

Mozaffar Abdollahifar

Keyword(s):

Fuel Cell ◽

Hydrogen Production ◽

Steam Reforming ◽

Synthesis Method ◽

Methanol Steam Reforming ◽

Homogeneous Precipitation ◽

Steam Reforming Of Methanol

In this research the effects of synthesis method and CeO2 and ZrO2 promoters were studied in the steam reforming of methanol over a CuO/ZnO/Al2O3 nanocatalyst. Addition of ZrO2 and CeO2 reduces CO selectivity, while CeO2 is more effective.

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