Thermodynamic comparison between bio-oil and ethanol steam reforming

Montero, Carolina; Oar‐Arteta, Lide; Remiro, Aingeru; Arandia, Aitor; Bilbao, Javier; Gayubo, Ana G.

doi:10.1016/j.ijhydene.2015.09.125

Cited by 56 publications

(22 citation statements)

References 33 publications

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“…Therefore, C 2+ hydrocarbons are intermediate products in the reaction scheme which are absent in the reaction product stream at equilibrium conditions. This coincides with previous studies [51,52,53].…”

Section: Resultssupporting

confidence: 94%

Steam Reforming of Model Bio-Oil Aqueous Fraction Using Ni-(Cu, Co, Cr)/SBA-15 Catalysts

Calles

Carrero

Vizcaíno

et al. 2019

IJMS

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Hydrogen obtained from biomass derivatives is considered a promising alternative to fossil fuels. The aim of this work is to test the viability of Ni-M/SBA-15 (M: Co, Cu, Cr) catalysts for the hydrogen production from bio-oil aqueous fraction reforming. Tests were performed in a fixed-bed reactor at 600 °C and atmospheric pressure. Firstly, the steam reforming (SR) of acetic acid, hydroxyacetone, furfural and phenol, as representative constituents of the bio-oil aqueous fraction, was carried out. Lower reactivity with increasing carbon number and decreasing steam-to-carbon ratio was observed. Coking rate during SR is a consequence of carbon number and aromaticity of the reactant, as well as the steam-to-carbon ratio. However, deactivation also depends on the graphitization degree of carbon filaments, higher in the case of coke formed from phenol. Then, the performance of the Ni-M/SBA-15 catalysts was studied in the reforming of a bio-oil aqueous fraction surrogate containing the four model compounds. Ni-Co/SBA-15 and Ni-Cr/SBA-15 samples were the most active because Co also catalyze the steam reforming reactions and Cr promotes the formation of very small Ni crystallites accounting for high conversion and the low coke deposition (~8 times lower than Ni/SBA-15) in the form of poorly condensed carbon filaments.

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Section: Resultssupporting

confidence: 94%

Steam Reforming of Model Bio-Oil Aqueous Fraction Using Ni-(Cu, Co, Cr)/SBA-15 Catalysts

Calles

Carrero

Vizcaíno

et al. 2019

IJMS

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“…Several studies regarding bio-oil steam reforming (BSR) (Aktaş et al, 2009;Lima Da Silva and Müller, 2011;Montero et al, 2015) have proved that at high enough residence times the gaseous mixture exiting the reactor is composed by H2, H2O, CO, CO2, and CH4, with negligible amounts of C2+ species, even at low temperature. As mentioned, the prediction of appearance of carbonaceous depositions was also considered.…”

Section: B Free Energy Minimization As a Tool For Computing Chemicalmentioning

confidence: 99%

“…Regarding thermodynamic studies of reforming of model compounds, the following works can be mentioned using acetic acid, methanol, ethylene glycol, acetone, ethanol, n-butanol, acetol, glycerol, phenol, syringol, furfural, isopropyl alcohol or lactic acid (Aktaş et al, 2009;Goicoechea et al, 2015;Lima Da Silva and Müller, 2011;Resende et al, 2015;Vagia and Lemonidou, 2007;Xie et al, 2014). Contrasting this number of papers, remarkably less references considering model mixtures with the main compounds of bio-oil are found (Montero et al, 2015;Resende et al, 2015). Resende et al (2015) conducted an interesting thermodynamic analysis of steam reforming of model compound and synthetic aqueous fraction of bio-oil.…”

Section: Introductionmentioning

confidence: 99%

“…Similarly, Domine et al (2008) calculated the thermodynamic equilibrium composition for bio-oil steam reforming, assuming a simplified bio-oil mixture with seventeen oxygenated of the main bio-oil components and water, to match the ratio C:H:O revealed by the elemental analysis of their real bio-oil sample. The research of Montero et al (2015) involves a thermodynamic study of steam reforming of a synthetic bio-oil composed of model species from real bio-oil components.…”

Section: Introductionmentioning

confidence: 99%

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Steam Reforming of Upgraded Bio-Oil Aqueous Phase Fraction From Sunflower Seed Hulls: Thermodynamic Analysis

Maidana¹,

Izurieta²,

Casoni³

et al. 2019

LAAR

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This work focuses on the study of hydrogen production process departing from waste lignocellulosic biomass. The bio-oil was first obtained by non-catalytic fast pyrolysis of sunflower seed hulls. Subsequently, it was upgraded to reduce the concentration of higher molecular weight compounds by water addition and mixing. A 1/1 bio-oil:water ratio was selected here. Later, a thermodynamic analysis based on free energy minimization was profited to study the steam reforming process of the upgraded bio-oil sample. The influence of the operation temperature on the reforming was analyzed. The highest hydrogen yields were obtained at ~740°C. A comparison with acetic acid used as model compound of the bio-oil is included. Results show that acetic acid is not a good approximation of a real aqueous phase of upgraded bio oil fraction. The study concludes with an analysis on the energetic efficiency, showing that its maximum is presented at lower temperatures than the maximum yield, due to the thermal requirements of preheating.

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“…GCMSren bitartez, 300 konposatutik gora identifikatu dira [10] eta horiek hainbat familiatan sailka daitezke: zetonak, azido karboxilikoak, aldehidoak, alkoholak, eterrak, esterrak eta konposatu fenolikoak [11]. EKAIA, 32 (2017) Aingeru Remiro, Lide Oar-Arteta, Ana G. Gayubo Bio-oilaren lurrun bidezko erreformatzearen (hemendik aurrera lurrun erreformatzea) erreakzio nagusiak dira oxigenatuen erreformatzea (1. ekuazioa) eta water gas shift (WGS) erreakzioa (2. ekuazioa), seriean:…”

Section: Irudiaunclassified

Hidrogeno-ekoizpena bio-oilaren erreformatze katalitikoaren bidez

Remiro

Oar‐Arteta

Gayubo³

2017

EKAIA

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Laburpena: H 2 -aren eskariaren igoerak, petrokimikako lehengai eta erregai garbi gisa erabiltzeko, petrolioaz bestelako lehengaiak jatorri duten prozesuen garapena bultzatu du. Prozesu horien artean, biomasak arreta berezia bereganatu du haren erabilgarritasunagatik eta berriztagarritasunagatik. Biomasatik H 2 -a lortzeko zeharkako bideek gero eta jakin-min handiagoa eragin dute, esate baterako, biomasatik eratorritako oxigenatuen bidezko lurrun erreformatzeak. Horien artean, bio-oilak interes handia dauka, beste bideek baino bideragarritasun ekonomiko handiagoa izan baitezake. Izan ere, bio-oilak ekoizpen deslokalizatua izan dezake biomasaren ekoizpen-fokoetan eta ondoren, unitate zentralizatuetara garraia daiteke balioztatzeko. Dena dela, prozesu horretan kontuan hartu beharra dago lignina pirolitikoak sortzen dituen arazoak, zehatzago, erreakzio-ekipoan eta katalizatzailean depositatzen den hondakin solidoa bio-oila lurruntzen denean. Arazo hori gainditzeko, beharrezkoa da teknologia eskalagarria. Horretaz gain, katalizatzaile aktibo, selektibo eta iraunkorren garapena funtsezkoa da prozesu horren bideragarritasuna lortzeko. Lan honetan, bibliografian dauden bio-oilaren erreformatzearen estrategia nagusiak aurkezten dira, ikerketa-taldearen emaitza originalak nabarmenduz.Hitz gakoak: bio-oila, hidrogeno ekoizpena, lurrun erreformatzea, CO 2 -aren harrapaketa, ohantze fluidizatua. Abstract:The growing demand of H 2 for its use as petrochemical raw material and clean fuel has boosted the development of processes for its production from alternative sources to oil, among which biomass has received special attention due to its availability and renewable nature. There is an increasing interest in the development of indirect routes for H 2 production from biomass, via steam reforming of biomass-derived oxygenated compounds. Indirect pathways to obtain hydrogen from biomass, such as the EKAIA 32.indd 35 EKAIA 32.indd 35

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Thermodynamic comparison between bio-oil and ethanol steam reforming

Cited by 56 publications

References 33 publications

Steam Reforming of Model Bio-Oil Aqueous Fraction Using Ni-(Cu, Co, Cr)/SBA-15 Catalysts

Steam Reforming of Model Bio-Oil Aqueous Fraction Using Ni-(Cu, Co, Cr)/SBA-15 Catalysts

Steam Reforming of Upgraded Bio-Oil Aqueous Phase Fraction From Sunflower Seed Hulls: Thermodynamic Analysis

Hidrogeno-ekoizpena bio-oilaren erreformatze katalitikoaren bidez

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