Microwave-assisted catalytic decomposition of methane over activated carbon for CO2CO2-free hydrogen production

Domı́nguez, A.; Fidalgo, Beatriz; Fernández, Yolanda; Pís, J.J.; Menéndez, J.Á.

doi:10.1016/j.ijhydene.2007.07.041

Cited by 136 publications

(53 citation statements)

References 30 publications

(40 reference statements)

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“…Higher gas fraction with an elevated content of synthesis gas was obtained at low temperatures (400 C). Other catalytic studies such as catalytic reforming of methanol, 204 isomerization of m-xylene, hydrolysis of hexanenitrile, oxidation of cyclohexene, esterification of stearic acid, 205 degradation of phenol wastewater using activated carbon as catalyst 206 and catalytic decomposition of methane 207 shows that microwave-assisted heating is better than conventional heating in terms of less processing time, reduced energy consumption with higher yields, generation of minimal waste and high selectivity of products.…”

Section: Ceramic Processingmentioning

confidence: 99%

Microwave material processing—a review

2011

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Microwave heating is caused by the ability of the materials to absorb microwave energy and convert it to heat. This article represents a review on fundamentals of microwave heating and their interaction with materials for various applications in a comprehensive manner. Experimental studies of single, multimode, and variable frequency microwave processing were reviewed along with their applications. Modeling of microwave heating based on Lambert's law and Maxwell's electromagnetic field equations have also been reviewed along with their applications. Modeling approaches were used to predict the effect of resonances on microwave power absorption, the role of supports for microwave heating, and to determine the nonuniformity on heating rates. Various industrial applications on thermal processing have been reviewed. There is tremendous scope for theoretical and experimental studies on the athermal effects of microwaves. Some of the unresolved problems are identified and directions for further research are also suggested.

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Section: Ceramic Processingmentioning

confidence: 99%

Microwave material processing—a review

2011

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“…NiO can be completely reduced to Ni by treating it with methane at 725°C (Dominguez et al 2007;Zein and Mohamed 2004). The metal reactor is heated up to the nickel oxide reduction temperature of 998 K under nitrogen flow rate of 54 cm 3 (STP/min).…”

Section: Activity Testmentioning

confidence: 99%

Hydrogen production using thermocatalytic decomposition of methane on Ni30/activated carbon and Ni30/carbon black

Srilatha

Viditha

Srinivasulu

et al. 2015

Environ Sci Pollut Res

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Hydrogen is an energy carrier of the future need. It could be produced from different sources and used for power generation or as a transport fuel which mainly in association with fuel cells. The primary challenge for hydrogen production is reducing the cost of production technologies to make the resulting hydrogen cost competitive with conventional fuels. Thermocatalytic decomposition (TCD) of methane is one of the most advantageous processes, which will meet the future demand, hence an attractive route for COx free environment. The present study deals with the production of hydrogen with 30 wt% of Ni impregnated in commercially available activated carbon and carbon black catalysts (samples coded as Ni30/AC and Ni30/CB, respectively). These combined catalysts were not attempted by previous studies. Pure form of hydrogen is produced at 850 °C and volume hourly space velocity (VHSV) of 1.62 L/h g on the activity of both the catalysts. The analysis (X-ray diffraction (XRD)) of the catalysts reveals moderately crystalline peaks of Ni, which might be responsible for the increase in catalytic life along with formation of carbon fibers. The activity of carbon black is sustainable for a longer time compared to that of activated carbon which has been confirmed by life time studies (850 °C and 54 sccm of methane).

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“…Microwave heating is expected to be more efficient than conventional heating system. However, carbon deposition in the catalyst pores will result in decreases in surface area and pore volume, followed by deactivation of the catalyst 60) . Furthermore, examination of the input electric power and frequency on the activity found effects on the product selectivity.…”

Section: Microwavesmentioning

confidence: 99%

Methane Conversion Assisted by Plasma or Electric Field

Oshima

Sekine

2013

J. Jpn. Petrol. Inst.

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Direct conversion of methane to other valuable products such as ethylene, methanol, benzene, carbon, hydrogen, and syngas has been widely investigated. Such conversion requires high temperatures because of the strong C-H bond in CH4, and such high-temperature reactions present various problems: sequential reaction to decrease the selectivity to target products, need for multiple heat exchangers to use or recover high-temperature waste heat, materials that are stable at high temperatures, etc. To solve these problems, several trials have been undertaken to lower reaction temperatures using plasma, Non-Faradaic Electrochemical Modification of Catalytic Activity (NEMCA), and electric fields. This review describes recent trends in methane conversion, and describes our methods to lower the reaction temperature.

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Microwave-assisted catalytic decomposition of methane over activated carbon for CO2CO2-free hydrogen production

Cited by 136 publications

References 30 publications

Microwave material processing—a review

Microwave material processing—a review

Hydrogen production using thermocatalytic decomposition of methane on Ni30/activated carbon and Ni30/carbon black

Methane Conversion Assisted by Plasma or Electric Field

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