Evaluation of energy efficient low carbon hydrogen production concepts based on glycerol residues from biodiesel production

Tasnadi-Asztalos, Zsolt; Agachi, Paul Şerban; Cormoş, Călin-Cristian

doi:10.1016/j.ijhydene.2015.04.003

Cited by 16 publications

(7 citation statements)

References 33 publications

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“…Glycerol is the main by-product generated in the biodiesel production. Biodiesel is one renewable biofuel obtained by catalytic trans-esterification of triglycerides with methanol [5].…”

Section: Introductionmentioning

confidence: 99%

Promoting effect of Sn on supported Ni catalyst during steam reforming of glycerol

Bobadilla

Romero-Sarria

Centeno

et al. 2016

International Journal of Hydrogen Energy

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The promoting effect of Sn on the catalytic performance of supported Ni catalyst in the reaction of glycerol steam reforming was studied. The physico-chemical properties of the prepared samples were investigated by X-ray fluorescence (XRF), BET surface area, in situ X-ray diffraction (XRD), laser Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) and temperature programmed oxidation (TPO) techniques. The characterization results of the samples after reduction treatment (in the same conditions than the activation before catalytic activity measurements) revealed the formation of Ni-Sn alloy. The Sn-doped catalyst exhibited a high activity and it was demonstrated that the Sn addition increase the catalyst stability and durability by decreasing the coke deposition.

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“…Glycerol is the main by-product generated in the biodiesel production. Biodiesel is one renewable biofuel obtained by catalytic trans-esterification of triglycerides with methanol [5].…”

Section: Introductionmentioning

confidence: 99%

Promoting effect of Sn on supported Ni catalyst during steam reforming of glycerol

Bobadilla

Romero-Sarria

Centeno

et al. 2016

International Journal of Hydrogen Energy

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“…54 In addition to the synthetic catalytic steps, the development and optimization of proper recovery and purification systems are key factors influencing the profitability of lactic acid production, because the costs related to purification steps represent over 50% of the total production costs. 55 Despite being considered a very interesting alternative, there are currently no examples of industrial processes based on the use of crude glycerol for the production of lactic acid. This can be ascribed to multiple factors, such as its lack of purity (usually contaminated with unreacted methanol, triglycerides, salts, base catalyst, etc.)…”

Section: Reactionmentioning

confidence: 99%

“…In this context, in recent years, progress has been made in converting glycerol to lactic acid through different processes involving chemical catalysis . In addition to the synthetic catalytic steps, the development and optimization of proper recovery and purification systems are key factors influencing the profitability of lactic acid production, because the costs related to purification steps represent over 50% of the total production costs …”

Section: Introductionmentioning

confidence: 99%

Glycerol valorization: conversion to lactic acid by heterogeneous catalysis and separation by ion exchange chromatography

Arcanjo

Silva

Cavalcante

et al. 2019

Biofuels Bioprod Bioref

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The consumption and production of biodiesel has grown dramatically in recent decades, motivated by a strong interest in renewable energy. This has generated a surplus of its main by‐product, glycerol. Several catalytic processes have been proposed to generate alternatives for using this excess glycerol, mainly focusing on its transformation into high value‐added chemical products. Various products, ranging from syngas to organic acids, such as acrylic or lactic acid, along with 1,2‐propanediol, 1,3‐propanediol, glycerol ethers or even polymers, have been produced starting from glycerol. Among this multitude of possibilities, the production of lactic acid is one of the most interesting alternatives to valorize glycerol, because of the wide range of applications described for this organic acid. This review focuses on recent studies dealing with the catalytic conversion of glycerol to lactic acid, using different heterogeneous catalysts, and evaluates the factors influencing the oxidation catalytic process and the proposed reaction mechanisms. Finally, recent studies on the separation and purification of lactic acid using ion exchange chromatography resins are also reported. © 2019 Society of Chemical Industry and John Wiley & Sons, Ltd

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“…Hydrolysis through photocatalytic water splitting (PWS) is an inexpensive process that does not require excessive energy consumption and, in some cases, produces a low amount of CO 2 . Titanium dioxide (TiO 2 ) is the traditionally used photocatalyst, in which its electrons are promoted from the valence band (VB) to the conduction band (CB), generating a gap.…”

Section: Introductionmentioning

confidence: 99%

“…Titanium dioxide (TiO 2 ) is the traditionally used photocatalyst, in which its electrons are promoted from the valence band (VB) to the conduction band (CB), generating a gap. Electrons and holes that migrate to the semiconductor surface without recombining can reduce and oxidize, respectively, the reactants adsorbed by the semiconductor to produce hydrogen , , . To avoid reconversion of the electron‐hole pair, noble‐metal particles have been used.…”

Section: Introductionmentioning

confidence: 99%

A Kinetic Model of Photocatalytic Hydrogen Production Employing a Hole Scavenger

et al. 2019

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Reactions involved in photocatalytic hydrogen production through water splitting combined with a hole scavenger involve several stages that make kinetic analysis quite complicated. In the present work, a kinetic model for the photocatalytic production of hydrogen has been developed based on competitive adsorption, considering the photocatalytic decomposition of an organic molecule coupled to hydrolysis through photocatalytic water splitting. Parameter estimation is performed by using the Levenberg‐Marquardt method. Model validation results give an estimation of the strength of adsorption of acetol and the acetaldehyde.

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Evaluation of energy efficient low carbon hydrogen production concepts based on glycerol residues from biodiesel production

Cited by 16 publications

References 33 publications

Promoting effect of Sn on supported Ni catalyst during steam reforming of glycerol

Promoting effect of Sn on supported Ni catalyst during steam reforming of glycerol

Glycerol valorization: conversion to lactic acid by heterogeneous catalysis and separation by ion exchange chromatography

A Kinetic Model of Photocatalytic Hydrogen Production Employing a Hole Scavenger

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