State-of-the-art catalysts for CH4 steam reforming at low temperature

Angeli, Sofia; Monteleone, G.; Giaconia, Alberto; Lemonidou, Angeliki A.

doi:10.1016/j.ijhydene.2013.12.001

Cited by 296 publications

(175 citation statements)

References 125 publications

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“…It merits to be highlighted the low amount of methane obtained over the catalytic monoliths 1Pt/ CeLa, 1Rh/CeLa, 1Ru/CeLa and 10Ni/CeLa as well as the nearly absence of C2eC3 hydrocarbons. This is in accordance to the results obtained in methane steam reforming (Equation (3)) studies, where Rh has shown to be the most active metal [19]. A progressive decrease of CH 4 selectivity with increasing reaction temperature was found for both Rh-, Pt-and Ru-based catalysts according to thermodynamics of methane steam reforming, but not for 10Ni/CeLa.…”

Section: Resultssupporting

confidence: 90%

Catalytic steam reforming of olive mill wastewater for hydrogen production

Casanovas

Galvis

Llorca

2015

International Journal of Hydrogen Energy

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Olive mill wastewater Catalytic honeycombsHydrogen production a b s t r a c t Catalytic honeycombs functionalized with lanthanum-stabilized ceria as catalytic support and impregnated with different metals (Rh, Ru, Pt, Pd and Ni) were prepared and tested for hydrogen production through the steam reforming of distillated, three-phase olive mill wastewater (OMW). Tests were carried out at atmospheric pressure, different temperatures (873e1023 K), and space velocities (4500e16,000 h -1 ) over catalytic honeycombs loaded with ca. 3 mg cm -2 of catalyst. The catalytic performance was evaluated in terms of hydrogen production, selectivity of gaseous products and stability for 24 h. The best results were obtained over Pt-and Rh-based catalytic systems. Chemical oxygen demand values were determined to quantify the total organic content of OMW and post-reaction condensate to quantify the extension of the reaction. Total organic contents were found to be 5.4 mg L -1 and 0.2e0.5 mg L -1 in OMW distillate and post-reaction condensate, respectively, which leads to a 90e96 % of organic content removal during the steam reforming process. Up to 40 STP mL of pure hydrogen per mL of distillated olive mill wastewater were produced over Pt/CeLa at 973 K and 16,000 h -1 . X-ray photoelectron spectroscopy analyses revealed carbon and calcium deposition during catalytic reaction.

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Section: Resultssupporting

confidence: 90%

Catalytic steam reforming of olive mill wastewater for hydrogen production

Casanovas

Galvis

Llorca

2015

International Journal of Hydrogen Energy

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“…-and H atoms in surface groups or the detected methane could be spent during the reaction by steam reforming since it is in contact with the formed water 67 . The affinity of methanol to the catalyst surface and also to the surfaces of the reaction vessels is expected to be higher than for DME since DME is more volatile than methanol 68 .…”

Section: Discussionmentioning

confidence: 99%

Time evolution of the CO2 hydrogenation to fuels over Cu-Zr-SBA-15 catalysts

Atakan

Erdtman

Mäkie

et al. 2018

Journal of Catalysis

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The self-archived postprint version of this journal article is available at Linköping University Institutional Repository (DiVA): http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-147297 N.B.: When citing this work, cite the original publication.Atakan, A., Erdtman, E., Mäkie, P., Ojamäe, L., Odén, M., (2018) ABSTRACT: Time evolution of catalytic CO2 hydrogenation to methanol and dimethyl ether (DME) has been investigated in a hightemperature high-pressure reaction chamber where products accumulate over time. The employed catalysts are based on a nano-assembly composed of Cu nanoparticles infiltrated into a Zr doped SiOx mesoporous framework (SBA-15): Cu-Zr-SBA-15. The CO2 conversion was recorded as a function of time by gas chromatography-mass spectrometry (GC-MS) and the molecular activity on the catalyst's surface was examined by diffuse reflectance in-situ Fourier transform infrared spectroscopy (DRIFTS). The experimental results showed that after 14 days a CO2 conversion of 25% to methanol and DME was reached when a DME selective catalyst was used which was also illustrated by thermodynamic equilibrium calculations. With higher Zr content in the catalyst, greater selectivity for methanol and a total 9.5 % conversion to methanol and DME was observed, yielding also CO as an additional product. The time evolution profiles indicated that DME is formed directly from methoxy groups in this reaction system. Both DME and methanol selective systems show the thermodynamically highest possible conversion.

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“…1,2 The state-of-art in hydrogen production is mainly based on steam reforming of fossil fuels, for which methane is preferable due to its availability and high H/C ratio. 1 Water-gas shift reaction can be performed simultaneously in order to produce additional hydrogen, reduce operating costs and facilitate CO 2 capture at the source. The main reactions involved in this process are thus steam reforming (SR) (1) and water-gas shift (WGS) (2), with the overall reaction (3) given below 3 Reforming reactions of this type are usually performed in separated catalytic packed-bed reactors (PBRs) due to significant differences in operating temperatures and catalyst composition.…”

Section: Introductionmentioning

confidence: 99%

Microstructured Catalytic Hollow Fiber Reactor for Methane Steam Reforming

Gil

Chadwick

et al. 2015

Ind. Eng. Chem. Res.

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Micro-structured alumina hollow fibres, which contain a plurality of radial micro-channels with significant openings on the inner surface, have been fabricated in this study and used to develop an efficient catalytic hollow fibre reactor. Apart from low mass transfer resistance, a unique structure of this type facilitates the incorporation of Ni-based catalysts, which can be with or without the aged secondary support, SBA-15. In contrast to a fixed bed reactor, the catalytic hollow fibre reactor shows similar methane conversion, with a GHVS of approximately 6.5 times higher, together with a significantly greater CO 2 selectivity and better productivity rates. All these prove the advantages of dispersing catalyst inside the micro-structured hollow fibre together with potentially reducing the quantity of catalysts required.

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State-of-the-art catalysts for CH4 steam reforming at low temperature

Cited by 296 publications

References 125 publications

Catalytic steam reforming of olive mill wastewater for hydrogen production

Catalytic steam reforming of olive mill wastewater for hydrogen production

Time evolution of the CO2 hydrogenation to fuels over Cu-Zr-SBA-15 catalysts

Microstructured Catalytic Hollow Fiber Reactor for Methane Steam Reforming

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