Exceptionally active and stable catalysts for CO2 reforming of glycerol to syngas

Bac, Selin; Say, Zafer; Koçak, Yusuf; Ercan, Kerem Emre; Harfouche, Messaoud; Özensoy, Emrah; Avcı, Ahmet K.

doi:10.1016/j.apcatb.2019.117808

Cited by 39 publications

(32 citation statements)

References 61 publications

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“…Hydrolysis Fermentation Purification Glycerol Biodiesel, the second most used biofuels after bio-ethanol, also attracted a wide amount of attention, which is mainly from the transesterification reaction of triglycerides. During the process, 1 kg of glycerol, the main by-product, was produced for 9 kg of biodiesel [4]. It was estimated that the production of glycerol each year can reach 4.2 million tons up to 2020 globally, while less than 3.5 million tons is needed each year [5].…”

Section: Lignocellulosic Biomass Pretreatmentmentioning

confidence: 99%

“…The H 2 -TPR analysis showed that the higher Ni amount promoted the reducibility of the Ni catalyst, which can be related to lower dispersion of Ni at higher content of Ni. Other catalysts, including Rh, Ni, and Co based catalysts (Al 2 O 3 -ZrO 2 -TiO 2 support) have been synthesized for the dry reforming of glycerol [4], with the particle size of Rh, Ni and Co being 3-4, 10-15, 40-50 nm, respectively. The highest activity was observed for Rh, while the activity of Co was the lowest.…”

Section: Dry Reforming Of Glycerolmentioning

confidence: 99%

“…H2-TPR data for fresh Al2O3-ZrO2-TiO2, Rh/Al2O3-ZrO2-TiO2, Ni/Al2O3-ZrO2-TiO2 and Co/Al2O3-ZrO2-TiO2 samples, reproduced with permission from[4].…”

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confidence: 99%

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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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Section: Lignocellulosic Biomass Pretreatmentmentioning

confidence: 99%

Section: Dry Reforming Of Glycerolmentioning

confidence: 99%

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Dry Reforming of Ethanol and Glycerol: Mini-Review

Odriozola

Reina

2019

Catalysts

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“…Due to the high cost of noble metal catalysts, their use is limited, despite the fact that such systems usually show high catalytic activity and low carbon formation during steam reforming reactions. Most of the works reported in the literature for the GSR have focused on ruthenium [38][39][40][41][42][43], as Ru is the least expensive among all noble metals, and platinum [44][45][46][47][48][49][50][51], but one may also find a few works that have examined the performance of Rh [52][53][54][55], Ir [56] or Pd [57] catalysts. However, there are only a handful of works that perform a comparative assessment of the performance of different noble metal catalysts [58,59].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Noble Metal (M: Ir, Pt, Pd) on M/Ce2O3-γ-Al2O3 Catalysts for Hydrogen Production via the Steam Reforming of Glycerol

et al. 2020

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A promising route for the energetic valorisation of the main by-product of the biodiesel industry is the steam reforming of glycerol, as it can theoretically produce seven moles of H2 for every mole of C3H8O3. In the work presented herein, CeO2–Al2O3 was used as supporting material for Ir, Pd and Pt catalysts, which were prepared using the incipient wetness impregnation technique and characterized by employing N2 adsorption–desorption, X-Ray Diffraction (XRD), Temperature Programmed Reduction (TPR), Temperature Programmed Desorption (TPD), X-ray Photoelectron Spectroscopy (XPS) and Transmission Electron Microscopy (TEM). The catalytic experiments aimed at identifying the effect of temperature on the total conversion of glycerol, on the conversion of glycerol to gaseous products, the selectivity towards the gaseous products (H2, CO2, CO, CH4) and the determination of the H2/CO and CO/CO2 molar ratios. The main liquid effluents produced during the reaction were quantified. The results revealed that the Pt/CeAl catalyst was more selective towards H2, which can be related to its increased number of Brønsted acid sites, which improved the hydrogenolysis and dehydrogenation–dehydration of condensable intermediates. The time-on-stream experiments, undertaken at low Water Glycerol Feed Ratios (WGFR), showed gradual deactivation for all catalysts. This is likely due to the dehydration reaction, which leads to the formation of unsaturated hydrocarbon species and eventually to carbon deposition. The weak metal–support interaction shown for the Ir/CeAl catalyst also led to pronounced sintering of the metallic particles.

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“…Its aim is to foster scientific and technological excellence as well as international cooperation amongst its members, which are currently Cyprus, Egypt, Iran, Israel, Jordan, Pakistan, Palestine, and Turkey. The first user experiments took place in July 2018 and the first paper using experimental data from SESAME was published in June 2019 [1].…”

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confidence: 99%