Hydrogen and/or syngas from steam reforming of glycerol. Study of platinum catalysts

Pompeo, Francisco; Santori, Gerardo Fabián; Nichio, Nora N.

doi:10.1016/j.ijhydene.2010.06.011

Cited by 140 publications

(73 citation statements)

References 27 publications

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“…Oxide supports, on the other hand, promote the WGS reaction, thus being more appropriated for hydrogen production with lower CO content [88,[93][94][95][96]. Despite this, acid ZrO2 and Al2O3 supports lead to fast deactivation of platinum catalysts mainly due to coke deposition, which results from the promotion of lateral reactions of dehydration, hydrogenolysis, dehydrogenation and condensation [88,97], as seen for Ni-based catalysts. It has been reported that the acidity of supports decreases in the order Al2O3 > ZrO2 > SiO2 [97,98].…”

Section: Effect Of the Support On The Catalytic Performancementioning

confidence: 99%

“…Despite this, acid ZrO2 and Al2O3 supports lead to fast deactivation of platinum catalysts mainly due to coke deposition, which results from the promotion of lateral reactions of dehydration, hydrogenolysis, dehydrogenation and condensation [88,97], as seen for Ni-based catalysts. It has been reported that the acidity of supports decreases in the order Al2O3 > ZrO2 > SiO2 [97,98]. Therefore, a solution for this deactivation problem includes the use of a support with lower acidity, like SiO2 [91,97,99].…”

Section: Effect Of the Support On The Catalytic Performancementioning

confidence: 99%

“…It has been reported that the acidity of supports decreases in the order Al2O3 > ZrO2 > SiO2 [97,98]. Therefore, a solution for this deactivation problem includes the use of a support with lower acidity, like SiO2 [91,97,99]. According to Pompeo et al [91,97], the silica support allows the Pt catalysts to promote mainly dehydrogenation reactions and subsequent cleavage of C-C bonds, thus presenting excellent activity to gaseous products, high H2 selectivity and remarkable stability over time.…”

Section: Effect Of the Support On The Catalytic Performancementioning

confidence: 99%

“…Therefore, a solution for this deactivation problem includes the use of a support with lower acidity, like SiO2 [91,97,99]. According to Pompeo et al [91,97], the silica support allows the Pt catalysts to promote mainly dehydrogenation reactions and subsequent cleavage of C-C bonds, thus presenting excellent activity to gaseous products, high H2 selectivity and remarkable stability over time. It was also observed for Pt/SiO2 supported catalyst that increasing the Pt content maintains the same active phase (same metal dispersion and average particle size).…”

Section: Effect Of the Support On The Catalytic Performancementioning

confidence: 99%

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Challenges and strategies for optimization of glycerol steam reforming process

Silva

Soria

Madeira

2015

Renewable and Sustainable Energy Reviews

202

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The steam reforming of the main biodiesel by-product, glycerol, has been catching up the interest of the scientific community in the last years. The use of glycerol for hydrogen production is an advantageous option not only because glycerol is renewable but also because it's use would lead to the decrease of the price of biodiesel, thus making it more competitive. Consequently, the use of biodiesel at large scale would significantly reduce CO2 emissions comparatively to fossil fuels. Moreover, hydrogen itself is seen as a very attractive clean fuel for transportation purposes.Therefore, the industrialization of the glycerol steam reforming (GSR) process would have a tremendous global environmental impact. In the last years, intensive research regarding GSR thermodynamics, catalysts, reaction mechanisms and kinetics, and innovative reactor configurations (sorption enhanced reactors (SERs) and membrane reactors (MRs)) has been done, aiming for improving the process effectiveness. In this review, the main challenges and strategies adopted for optimization of GSR process are addressed, namely the GSR thermodynamic aspects, the last developments on catalysis and kinetics, as well as the last advances on GSR performed in SERs and MRs.

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Section: Effect Of the Support On The Catalytic Performancementioning

confidence: 99%

Section: Effect Of the Support On The Catalytic Performancementioning

confidence: 99%

Section: Effect Of the Support On The Catalytic Performancementioning

confidence: 99%

Section: Effect Of the Support On The Catalytic Performancementioning

confidence: 99%

See 2 more Smart Citations

Challenges and strategies for optimization of glycerol steam reforming process

Silva

Soria

Madeira

2015

Renewable and Sustainable Energy Reviews

202

View full text Add to dashboard Cite

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“…It was established by lab experimentation than Ni/SiO 2 and Pt/SiO 2 catalysts followed the same reaction steps, involving dehydrogenation on GSR [140]. The latter catalyst shows higher stability, metal dispersion, higher activity for gaseous products, and higher selectivity to H 2 [138].…”

Section: Catalystsmentioning

confidence: 97%

Upgrading the Glycerol from Biodiesel Production as a Source of Energy Carriers and Chemicals—A Technological Review for Three Chemical Pathways

Rodrigues

Bordado²,

Santos³

2017

Energies

128

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Abstract:Glycerol is a by-product of biodiesel obtained from biomass, accounting for 10% of the biodiesel production. In the context of a green economy, aiming for a reduction of the emission of atmospheric greenhouse gases emissions, the demand of biodiesel is expected to increase vastly, in parallel with a side glut supply of glycerol. Given the high cost of biodiesel compared with its fossil congener, upgrading of glycerol into added-value products can represent a secondary income source and turn the production of such alternative fuels economically sustainable in the long term. The glycerol obtained as by-product of biodiesel from biomass is in a crude form and must be purified. Some industrial solutions and applications were therein geared. The survey presented in this work, based on a reviewing of the existing literature, examines three routes for the valuing glycerol into energy carriers and chemicals, namely, carbonation, acylation, and steam reforming to hydrogen. The latter is embodied of great interest and importance, insofar that hydrogen by itself is considered as straighforward clean fuel for transportation uses, due to its high calorific power and to recent advances in fuel cells. We also have focused on the chain value from biomass to energies carriers through these pathways.

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