Hydrogen-rich gas production by steam reforming of n-dodecane

Vita, Antonio; Italiano, Cristina; Fabiano, C.; Pino, L.; Laganà, M.; Recupero, V.

doi:10.1016/j.apcatb.2016.06.042

Cited by 80 publications

(15 citation statements)

References 62 publications

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“…This profile can be considered typical of well-dispersed Pt nanoparticles over CeO 2 support. In fact, as previously reported in the literature, 43,44 pure ceria prepared by SCS (not reported here) displays two main reduction peaks at 500 and 930 °C, respectively. The existence of Pt does not interfere with the high-temperature reduction peak, which remains at around 922 °C, indeed it causes huge alterations in the reduction zone at intermediate/low temperature.…”

Section: Methodssupporting

confidence: 90%

Methane Steam Reforming on the Pt/CeO₂ Catalyst: Effect of Daily Start-Up and Shut-Down on Long-Term Stability of the Catalyst

Amjad

Quintero

Ercolino

et al. 2019

Ind. Eng. Chem. Res.

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An environmentally friendly auxiliary power unit requires catalysts operating in the cyclic mode, producing H2 at a steady rate with high CO2 selectivity and minimum CO clean-up. Here, 1% Pt/CeO2 catalyst was synthesized using the solution combustion synthesis method and investigated toward methane steam reforming reaction. Preliminary tests were performed by varying the steam-to-carbon ratio (S/C), gas hourly space velocity (GHSV), and time-on-stream (TOS). The catalyst showed near-equilibrium CH4 conversion and high H2 concentration (75% dry basis, N2-free) obtained at S/C = 2.8 and GHSV = 24 000 h–1. The catalytic activity was stable after 25 cycles of start-up and shut-down operations, equivalent to 150 h of TOS. X-ray diffraction, transmission electron microscopy, and X-ray photoelectron spectroscopy techniques were used to characterize either the fresh and aged catalyst after 150 h of TOS.

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Section: Methodssupporting

confidence: 90%

Methane Steam Reforming on the Pt/CeO₂ Catalyst: Effect of Daily Start-Up and Shut-Down on Long-Term Stability of the Catalyst

Amjad

Quintero

Ercolino

et al. 2019

Ind. Eng. Chem. Res.

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“…From Figures 7 and 8, a distinct diffraction peak of graphite carbon is observed in the reduced OC sample, indicating that the graphitized carbon is also formed besides the amorphous carbon during toluene catalytic cracking. The result is very consistent with the literature results, 42,43 where two kinds of carbon deposition (amorphous carbon and graphitized carbon) were generated during catalytic cracking of toluene or tar.…”

Section: Acs Sustainable Chemistry and Engineeringsupporting

confidence: 92%

Exploring the Conversion Mechanisms of Toluene as a Biomass Tar Model Compound on NiFe₂O₄ Oxygen Carrier

Huang

Deng

Feng

et al. 2019

ACS Sustainable Chem. Eng.

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As a novel biomass gasification technology, chemical looping gasification (CLG) could in situ catalytically crack biomass tar by oxygen carrier (OC). This study compares the reactivity of different OCs (Al 2 O 3 , Fe 2 O 3 , NiO, NiO+Fe 2 O 3 , and NiFe 2 O 4 ) to crack a biomass tar model compound (toluene) and preliminarily explores the reaction mechanisms of toluene cracked by NiFe 2 O 4 OC. Among five OCs, NiFe 2 O 4 with a homogeneous Fe/Ni dispersibility shows the best reactivity for toluene cracking with a toluene conversion and H 2 yield of 96.83% and 0.91 L/g, respectively. Additionally, on the basis of the dispersibility of active sites on the OC sample surface, the reactivity of the other four OCs to crack toluene shows the sequence NiO+Fe 2 O 3 > Fe 2 O 3 > NiO ≫ Al 2 O 3 . A large amount of carbon deposition, including amorphous carbon and graphitized carbon, is generated during toluene catalytic cracking, while the addition of steam significantly eliminates the carbon deposition. The NiFe 2 O 4 OC shows a dual-function of in situ oxidation−catalysis during toluene cracking. A mechanism of four steps is proposed for the toluene cracking on OCs: (I) toluene cracking at high temperature, (II) reduction of OC, (III) generation of amorphous carbon deposition and (III′) formation of graphitized carbon, and (IV) elimination of carbon deposition.

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“…Then, the temperature decreased to the room temperature, Pt dispersion was tested by CO-pulse chemisorption. For Pt/CeZrO 2 , the test method as the refs. , Before CO-pulse chemisorption, CO 2 was adsorbed to avoid the CO adsorption on the CeZrO 2 material.…”

Section: Methodsmentioning

confidence: 99%

“…For Pt/CeZrO 2 , the test method as the refs. 19,20 Before CO-pulse chemisorption, CO 2 was adsorbed to avoid the CO adsorption on the CeZrO 2 material. The in situ adsorption−desorption of NH 3 was investigated using an FTIR (Thermo Nicolet 6700) spectrometer.…”

Section: Methodsmentioning

confidence: 99%

Different Reaction Mechanisms of Ammonia Oxidation Reaction on Pt/Al₂O₃ and Pt/CeZrO₂ with Various Pt States

Sun

Liu²,

Song

et al. 2019

ACS Appl. Mater. Interfaces

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NH3 emissions were limited strictly because of the threat for human health and sustainable development. Pt/Al2O3 and Pt/CeZrO2 were prepared by the impregnation method. Differences in surface chemical states, reduction ability, acid properties, morphological properties, reaction mechanisms, and ammonia oxidation activity were studied. It indicated that Pt species states were affected by different metal–support interactions. The homogeneously dispersed Pt species over Pt/Al2O3 exposed Pt(111) because of weak metal–support interactions; there even existed an obvious interface between Pt and Al2O3. While obscure even an overlapped interface was observed over Pt/CeZrO2, resulting in the formation of PtO because of the oxygen migration from CeZrO2 to Pt species (confirmed by CO-FTIR, the cycled H2-TPR and transmission electron microscopy results). It was noteworthy that different reaction mechanisms were induced by different states of Pt species; NH was the key intermediate species for ammonia oxidation reaction over Pt/Al2O3, but two kinds of intermediates, N2H4 and HNO, were observed for Pt/CeZrO2. It consequently resulted in the obvious distinction of the NH3-SCO catalytic performance; the light-off temperatures of NH3 over Pt/Al2O3 and Pt/CeZrO2 were 231 and 275 °C, respectively, while the maximum N2 selectivity (65%) was obtained over Pt/CeZrO2, it was obviously better than that over Pt/Al2O3.

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Hydrogen-rich gas production by steam reforming of n-dodecane

Cited by 80 publications

References 62 publications

Methane Steam Reforming on the Pt/CeO₂ Catalyst: Effect of Daily Start-Up and Shut-Down on Long-Term Stability of the Catalyst

Methane Steam Reforming on the Pt/CeO₂ Catalyst: Effect of Daily Start-Up and Shut-Down on Long-Term Stability of the Catalyst

Exploring the Conversion Mechanisms of Toluene as a Biomass Tar Model Compound on NiFe₂O₄ Oxygen Carrier

Different Reaction Mechanisms of Ammonia Oxidation Reaction on Pt/Al₂O₃ and Pt/CeZrO₂ with Various Pt States

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Hydrogen-rich gas production by steam reforming of n-dodecane

Cited by 80 publications

References 62 publications

Methane Steam Reforming on the Pt/CeO2 Catalyst: Effect of Daily Start-Up and Shut-Down on Long-Term Stability of the Catalyst

Methane Steam Reforming on the Pt/CeO2 Catalyst: Effect of Daily Start-Up and Shut-Down on Long-Term Stability of the Catalyst

Exploring the Conversion Mechanisms of Toluene as a Biomass Tar Model Compound on NiFe2O4 Oxygen Carrier

Different Reaction Mechanisms of Ammonia Oxidation Reaction on Pt/Al2O3 and Pt/CeZrO2 with Various Pt States

Contact Info

Product

Resources

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Methane Steam Reforming on the Pt/CeO₂ Catalyst: Effect of Daily Start-Up and Shut-Down on Long-Term Stability of the Catalyst

Methane Steam Reforming on the Pt/CeO₂ Catalyst: Effect of Daily Start-Up and Shut-Down on Long-Term Stability of the Catalyst

Exploring the Conversion Mechanisms of Toluene as a Biomass Tar Model Compound on NiFe₂O₄ Oxygen Carrier

Different Reaction Mechanisms of Ammonia Oxidation Reaction on Pt/Al₂O₃ and Pt/CeZrO₂ with Various Pt States