Electrochemical reforming of an acidic aqueous glycerol solution on Pt electrodes

Kongjao, Sangkorn; Damronglerd, Somsak; Hunsom, Mali

doi:10.1007/s10800-010-0226-3

Cited by 53 publications

(37 citation statements)

References 26 publications

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“…In this context, the process Downloaded by [Princeton University] at 04: 47 17 September 2013 intensification technology provides many choices. As demonstrated in recent studies, in situ adsorption, supercritical fluids, membrane catalysts or reactors, microchannel reactors, reactive distillation, microwave heating, photoor electric-catalysts were able to intensify some catalytic reactions for the conversion of glycerol (402,403). However, many other process intensification methods remain untouched in the catalytic conversion of glycerol.…”

Section: Summary and Future Prospectsmentioning

confidence: 96%

Recent Advances in Catalytic Conversion of Glycerol

Zhou¹,

Zhao²,

Tong³

et al. 2013

Catalysis Reviews

177

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The article underlines and discusses the state-of-the-art accomplishments in the catalytic conversion of glycerol (1,2,3-propanetriol) to fuels and value-added chemicals in the past five years (2008)(2009)(2010)(2011)(2012). The reactions include steam reforming, aqueous-phase reforming, hydrogenolysis, oxidation, dehydration, esterification, etherification, carboxylation, acetalization, and chlorination. Typical products are hydrogen, propanediols, dihydroxyacetone, glyceric acid, acrolein, glyceride, polyglycerol, glycerol carbonate, acetals, ketals, and epichlorohydrine. Recent studies on the catalysts, reaction conditions, and possible pathways are primarily discussed. They indicate that major breakthroughs are achieved by the use of multifunctional catalysts, process intensification and integrated reactions. Literature survey suggests that future work on the catalytic conversion of glycerol for commercial goals particularly requires new catalysts, innovative reactor engineering, and close multidisciplinary partnership.

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Section: Summary and Future Prospectsmentioning

confidence: 96%

Recent Advances in Catalytic Conversion of Glycerol

Zhou¹,

Zhao²,

Tong³

et al. 2013

Catalysis Reviews

177

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“…The first aspect is related to water adsorption and activation reaction. For the second aspect, Kongjao et al have detected numerous C1–C6 reaction products with different oxidation levels during the electrochemical reforming of glycerol on Pt electrodes . The number of hydrogen molecules formed is lower than the theoretical one for the complete oxidation of glycerol into CO 2 :

{normalC normalH}_{2} normalO normalH  CHOH  {normalC normalH}_{2} normalO normalH prefix+ 3 H_{2} normalO \to 3 {normalC normalO}_{2} + 7 H_{2} .

…”

Section: Electrolysis Of Alcohol For Clean Hydrogen Productionmentioning

confidence: 98%

Electrochemical conversion of alcohols for hydrogen production: a short overview

Coutanceau

Baranton

2016

WIREs Energy & Environment

104

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In the emerging hydrogen economy, one of the major objectives is the production of electricity using fuel cells, particularly proton exchange membrane fuel cells (PEMFC). In this perspective, high purity hydrogen is needed. Hydrogen is currently mainly produced from fossil fuels (natural gas, oil, and coal) by energy‐consuming and environmentally unfriendly industrial processes that also involve complicated clean up steps for the removal of carbon monoxide and carbon dioxide. Water electrolysis (particularly the proton exchange membrane electrolysis technology, which allows higher efficiency than alkaline technology) appears to be a good candidate for the production of clean hydrogen. The use of renewable primary energy sources, such as wind, solar, tidal, etc., makes this technology greener. However, the low kinetics of water oxidation, which implies high cell voltage (i.e. high energy consumption) even when using noble metal‐based catalysts (Pt, Ru, Ir), makes this technology expensive. Biosourced alcohols can be interesting alternatives as hydrogen carriers in an electrolysis cell; their reversible oxidation potentials are much lower than that of water, ca 0.1 V versus SHE (standard hydrogen electrode) against 1.23 V versus SHE, so that the cell voltages for hydrogen production are lower (and so is the energy consumption). However, the low kinetics of alcohol oxidation in acidic media requires high Pt‐based catalyst loadings at the anode. Direct alcohol alkaline electrolysis cells can be operated with low Pt loading and even non‐noble metals. In the case of glycerol, generation of hydrogen at the cathode can be performed simultaneously with the formation of value‐added products at the anode for a more profit‐making process. WIREs Energy Environ 2016, 5:388–400. doi: 10.1002/wene.193 This article is categorized under: Bioenergy > Science and Materials Fuel Cells and Hydrogen > Science and Materials Energy Efficiency > Science and Materials

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“…Catalytic steam reforming Advantages • Lower reaction temperatures (<100 • C) making possible a rapid startup • Low toxicity • Direct pure hydrogen production, separated from other reaction products • Easier and fast control of hydrogen production rate • Compact unit combining both reaction and hydrogen purification with a consequent capital costs reduction • High renewable energy integration • Reduced environmental impact • Seasonal energy storage without energy losses • Capability to handle power fluctuations by H2 production • Lower power demands than water electrolysis, since part of the energy required is provided by the organic molecule this context, recent studies have shown that the electrochemical reforming of water-alcohol mixtures, i.e., methanol [5][6][7][8], glycerol [9,10], ethanol [11,12], bioethanol [13,14] and ethylene glycol [15] has a great potential for H 2 production at atmospheric pressure. The use of such compounds allows electrolysis at potentials lower than 1.2 V, leading to electrical power savings if compared to conventional electrolytic water splitting.…”

Section: Electrochemical Reforming Of Alcoholsmentioning

confidence: 99%