CO2 reforming of glycerol over La-Ni/Al2O3 catalyst: A longevity evaluative study

Siew, Kah Weng; Lee, Hua Chyn; Khan, Maksudur R.; Gimbun, Jolius; Cheng, Chin Kui

doi:10.1016/s2095-4956(15)60324-2

Cited by 36 publications

(18 citation statements)

References 10 publications

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“…Nano-filament carbon with narrow hollow tube could be formed on both catalysts, Ni/Al 2 O 3 and La-Ni/Al 2 O 3 ( Figure 3c,f respectively). A long-run stability of La promoted Ni/Al2O3 catalysts for glycerol-dry reforming was proposed by Cheng et al [55]. Field emission scanning electron microscopy (FE-SEM), TEM, and HRTEM analyses of catalysts after 72 h reaction were performed, as shown in Figure 3.…”

Section: Dry Reforming Reactionsmentioning

confidence: 95%

“…These results evidenced the role played by Zr on the carbon nanostructures, preventing the formation of fishbone carbon nanofibers during the methane decomposition process. A long-run stability of La promoted Ni/Al 2 O 3 catalysts for glycerol-dry reforming was proposed by Cheng et al [55]. Field emission scanning electron microscopy (FE-SEM), TEM, and HRTEM analyses of catalysts after 72 h reaction were performed, as shown in Figure 3.…”

Section: Dry Reforming Reactionsmentioning

confidence: 96%

“…The dry reforming reaction for the production of bamboo-like carbon nanotubes over different catalysts was recently reported in several literature examples [18,[54][55][56]. Among the dry reforming reactions, CH 4 dry reforming and glycerol dry reforming are the common routes for the fabrication of bamboo-like carbon nanotubes.…”

Section: Dry Reforming Reactionsmentioning

confidence: 99%

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Controllable and Large-Scale Synthesis of Carbon Nanostructures: A Review on Bamboo-Like Nanotubes

et al. 2017

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Bamboo-like carbon nanotubes are members of the carbon nanotubes (CNTs) family, whose structure is made up of separated hollow compartments and bamboo knots. Due to the peculiar structure of the CNTs species, the growth mechanism and related features have been widely investigated. Bamboo-like carbon nanotubes are widely applied in several fields, such as sensors, adsorbents, catalysts, and lithium-ion battery electrodes materials. Different methods have been applied for the synthesis of carbon nanotubes, among them, catalytic chemical vapor deposition has been singled out as the most used procedure due to low cost with a high quality product. The present review is devoted to increasing the literature dealing with the design, synthesis, and characterization of bamboo-like carbon nanotubes grown over different catalysts. Results on the methane dry reforming reaction, hydrocarbon thermal decomposition, special chemical vapor deposition as well as other methods applied to the preparation of bamboo-like carbon nanotubes are discussed. The differences in the carbon deposits between the dry reforming reaction and other reaction methods are compared and possible formation mechanisms of bamboo-like carbon nanotubes are discussed.

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Section: Dry Reforming Reactionsmentioning

confidence: 95%

Section: Dry Reforming Reactionsmentioning

confidence: 96%

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Controllable and Large-Scale Synthesis of Carbon Nanostructures: A Review on Bamboo-Like Nanotubes

et al. 2017

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“…To optimize the behavior of Ni based catalyst, La has been incorporated as a promoter for the dry reforming of glycerol [13,48,52,53]. After evaluating the effect of different content of La loaded, it was found that the glycerol conversion decreased in the order of 2%La-Ni/Al2O3 > 3%La-Ni/Al2O3 > 4%La-Ni/Al2O3 > 1%La-Al2O3 > Ni/Al2O3 > 5%La-Ni/Al2O3 > Al2O3.…”

Section: Dry Reforming Of Glycerolmentioning

confidence: 99%

Dry Reforming of Ethanol and Glycerol: Mini-Review

Odriozola

Reina

2019

Catalysts

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Dry reforming of ethanol and glycerol using CO2 are promising technologies for H2 production while mitigating CO2 emission. Current studies mainly focused on steam reforming technology, while dry reforming has been typically less studied. Nevertheless, the urgent problem of CO2 emissions directly linked to global warming has sparked a renewed interest on the catalysis community to pursue dry reforming routes. Indeed, dry reforming represents a straightforward route to utilize CO2 while producing added value products such as syngas or hydrogen. In the absence of catalysts, the direct decomposition for H2 production is less efficient. In this mini-review, ethanol and glycerol dry reforming processes have been discussed including their mechanistic aspects and strategies for catalysts successful design. The effect of support and promoters is addressed for better elucidating the catalytic mechanism of dry reforming of ethanol and glycerol. Activity and stability of state-of-the-art catalysts are comprehensively discussed in this review along with challenges and future opportunities to further develop the dry reforming routes as viable CO2 utilization alternatives.

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“…GDR has become the focus of experimental studies only recently and the available information in the literature regarding its catalysis is rather scarce. Siew et al [17][18][19][20] studied GDR over La-promoted Ni/ Al 2 O 3 catalysts at temperatures between 650-850°C and CO 2 /G = 0-5. The authors concluded that La promotion (i) provided better metal dispersion (i.e.…”

Section: Introductionmentioning

confidence: 99%

Dry reforming of glycerol over Rh-based ceria and zirconia catalysts: New insights on catalyst activity and stability

Bulutoglu

Say

Bac

et al. 2018

Applied Catalysis A: General

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Effects of reaction temperature and feed composition on reactant conversion, product distribution and catalytic stability were investigated on syngas production by reforming of glycerol, a renewable waste, with CO 2 on Rh/ ZrO 2 and Rh/CeO 2 catalysts. For the first time in the literature, fresh and spent catalysts were characterized by in-situ FTIR, Raman spectroscopy, transmission electron microscopy and energy dispersive X-ray analysis techniques in order to unravel novel insights regarding the molecular-level origins of catalytic deactivation and aging under the conditions of glycerol dry reforming. Both catalysts revealed increased glycerol conversions with increasing temperature, where the magnitude of response became particularly notable above 650 and 700°C on Rh/ZrO 2 and Rh/CeO 2 , respectively. In accordance with thermodynamic predictions, CO 2 transformation occurred only above 700°C. Syngas was obtained at H 2 /CO ∼0.8, very close to the ideal composition for Fischer-Tropsch synthesis, and carbon formation was minimized with increasing temperature. Glycerol conversion decreased monotonically, whereas, after an initial increase, CO 2 conversion remained constant upon increasing CO 2 /glycerol ratio (CO 2 /G) from 1 to 4. In alignment with the slightly higher specific surface area of and smaller average Rh-particle size on ZrO 2 , Rh/ZrO 2 exhibited higher conversions and syngas yields than that of Rh/CeO 2. Current characterization studies indicated that Rh/CeO 2 revealed strong metal-support interaction, through which CeO 2 seemed to encapsulate Rh nanoparticles and partially suppressed the catalytic activity of Rh sites. However, such interactions also seemed to improve the stability of Rh/CeO 2 , rendering its activity loss to stay below that of Rh/ZrO 2 after 72 h time-on-stream testing at 750°C and for CO 2 /G = 4. Enhanced stability in the presence of CeO 2 was associated with the inhibition of coking of the catalyst surface by the mobile oxygen species and creation of oxygen vacancies on ceria domains. Deactivation of Rh/ZrO 2 was attributed to the sintering of Rh nanoparticles and carbon formation.

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CO2 reforming of glycerol over La-Ni/Al2O3 catalyst: A longevity evaluative study

Cited by 36 publications

References 10 publications

Controllable and Large-Scale Synthesis of Carbon Nanostructures: A Review on Bamboo-Like Nanotubes

Controllable and Large-Scale Synthesis of Carbon Nanostructures: A Review on Bamboo-Like Nanotubes

Dry Reforming of Ethanol and Glycerol: Mini-Review

Dry reforming of glycerol over Rh-based ceria and zirconia catalysts: New insights on catalyst activity and stability

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