Production of hydrogen, alkanes and polyols by aqueous phase processing of wood-derived pyrolysis oils

Vispute, Tushar P.; Huber, George W.

doi:10.1039/b912522c

Cited by 239 publications

(214 citation statements)

References 28 publications

(50 reference statements)

Supporting

Mentioning

206

Contrasting

Order By: Relevance

“…The residence time was relatively long (approximately 6 h is common [16,51]) because a constant weight could not be assessed without at least 2 h of cooling before removing the sample from the furnace.…”

Section: Christchurchmentioning

confidence: 99%

“…Upgrading crude bio-oil through either catalytic cracking or hydroprocessing has been extensively studied [14][15][16][17][18][19][20][21][22][23][24][25][26][27], however, the upgrading process is complicated due to the complexity of the biooil, resulting in low yields and high processing costs. Pre-treating biomass prior to pyrolysis has the potential to improve the quality of crude pyrolysis bio-oil and thus, increase the efficiency of upgrading via catalytic cracking and hydroprocessing processes through reduced reactor clogging and catalyst deactivation.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The use of demineralisation and torrefaction to improve the properties of biomass intended as a feedstock for fast pyrolysis

Wigley

Yip

Pang

2015

Journal of Analytical and Applied Pyrolysis

View full text Add to dashboard Cite

Pre-treatments of biomass were investigated to reduce its undesirable properties which may affect the quality of fast pyrolysis bio-oil. A pre-treatment sequence was developed in this study to incorporate both biomass demineralisation and torrefaction. Demineralisation was performed by dilute acid leaching, primarily to reduce the inorganic concentration in raw biomass, whereas torrefaction targeted a reduction of the carboxyl, moisture and oxygen content. The liquid produced during torrefaction was recycled back as the leaching reagent for demineralisation. This solution contained dilute organic acids; therefore, the viability of leaching with organic acids (acetic and formic acid) compared to commonly used mineral acids (sulphuric, nitric and hydrochloric acid) was validated. Synthetic leaching solutions reduced the inorganic content in raw biomass from 0.41 wt% to 0.14 wt% when leached with 1% formic acid and to 0.16 wt% when leached with 1% acetic acid, which was comparable to leaching with the mineral acids. Recycled torrefaction liquid that contained other acidic compounds in small quantities reduced the inorganic content to 0.14 wt%, suggesting it is effective to use the recycled torrefaction liquid as the leaching solution. From the experimental results, the optimal conditions for biomass torrefaction were 260 °C for 20 min to minimise the char formation during pyrolysis, based on the increase in the acid-insoluble fraction of the biomass. However, the torrefaction temperature may be increased to 280 °C if further reductions in acetyl and oxygen content are required. Higher temperatures are associated with severe biomass loss and the initiation of hydrogen loss. It should be noted that even at 280 °C, the oxygen reduction is minimal. If oxygen reduction is the principal target when pre-treating biomass, it is suggested that torrefaction alone is not a suitable method to obtain bio-oil with a low oxygen content due to the low pyrolysis yields obtainable. This study demonstrated that the combined use of demineralisation and torrefaction as biomass pre-treatments has the ability to decrease the inorganic, acetyl and moisture content of biomass, which reduces undesirable catalytic reactions during fast pyrolysis to improve the quality of bio-oil produced.

show abstract

Section: Christchurchmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The use of demineralisation and torrefaction to improve the properties of biomass intended as a feedstock for fast pyrolysis

Wigley

Yip

Pang

2015

Journal of Analytical and Applied Pyrolysis

View full text Add to dashboard Cite

show abstract

“…Later studies performed on the topic mainly examined silica-alumina catalysts [23,30,[49][50][51]. This support has acidic properties but is sensitive to the hydrothermal conditions of sorbitol transformation [51].…”

Section: Acidic Solidsmentioning

confidence: 99%

“…Titanium oxide and silica are also highly valued [18,54,65]. Lastly, alumina, as a conventional support for heterogeneous catalysis, is often studied for the transformation of sorbitol, though its stability in aqueous phase is questionable: gamma alumina rehydrates into boehmite in a few hours under hydrothermal conditions close to APP or APR [22,23,49,66].…”

Section: Other Supportsmentioning

confidence: 99%

Transformation of Sorbitol to Biofuels by Heterogeneous Catalysis: Chemical and Industrial Considerations

Vilcocq

Cabiac

Especel

et al. 2013

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

View full text Add to dashboard Cite

Résumé -Transformation du sorbitol en biocarburants par catalyse hétérogène : considérations chimiques et industrielles -La raréfaction du pétrole et l'augmentation conjointe de la demande en carburants ont conduit à la recherche de carburants alternatifs. Dans un premier temps, la valorisation de ressources agricoles alimentaires pour la production d'éthanol et de biodiesel a permis de développer les biocarburants de première génération. Aujourd'hui les travaux de recherche s'orientent vers l'utilisation de biomasse lignocellulosique comme source de carbone renouvelable (biocarburants de deuxième génération). Alors que la filière de l'éthanol cellulosique est en plein développement, une nouvelle voie consistant à transformer des sucres et polyols d'origine lignocellulosique en alcanes légers par catalyse hétérogène bifonctionnelle en phase aqueuse a été récemment décrite. Ce procédé s'effectue à basse température et pression modérée (T < 300 °C et P < 50 bar). Il nécessite, d'une part, la formation d'hydrogène par reformage catalytique de carbohydrates en phase aqueuse et, d'autre part, la déshydratation/hydrogénation de polyols conduisant à un alcane par ruptures sélectives des liaisons C-O. Un défi lié à cette thématique réside dans le développement de systèmes catalytiques multifonctionnels stables, actifs et sélectifs dans les conditions de la réaction de transformation. L'objectif de l'article est de présenter les réactions mises en jeu, les systèmes catalytiques décrits dans la littérature pour ce type de transformation ainsi que des exemples d'applications industrielles. Abstract

show abstract

“…However, bio-oil cannot be utilized as a transportation fuel due to high viscosity, water and oxygen content and lower heating value as compared to diesel. Hence, upgrading process to convert it to tangible fuels is done under the process of catalytic hydrogenation and catalytic cracking (Vispute and Huber 2009). …”

Section: Pyrolysismentioning

confidence: 99%

Exploring untapped energy potential of urban solid waste

Vaish

Srivastava

Singh

et al. 2016

Energ. Ecol. Environ.

View full text Add to dashboard Cite

There is continuous increase in quantum and variety of waste being generated by anthropogenic activities. Burgeoning amount of waste being generated has potential to harm the environment and human health. Aggravating the problem, ever-increasing energy demand is putting strain on the non-renewable sources of energy and there is huge gap between the demand and supply of energy. This has led the scientific communities to adopt innovative methods to reduce, reuse and recycle them. Therefore, there is an urgent need to minimize the quantity of waste and meet the current demand profile of energy is required; technologies to recover energy from waste can play a vital role in substantial energy recovery and reduction in waste for final disposal; in addition to meet the rising energy requirement. Generating power from waste has greatly reduced the environmental impact and dependency on fossil fuels for electricity generation. Economically also it is an optimal solution for recovery of heat and power from waste. This paper gives an overview of energy potential stored in waste, major available waste-to-energy technologies and also strategic action plan for implementation of these technologies.

show abstract

Production of hydrogen, alkanes and polyols by aqueous phase processing of wood-derived pyrolysis oils

Cited by 239 publications

References 28 publications

The use of demineralisation and torrefaction to improve the properties of biomass intended as a feedstock for fast pyrolysis

The use of demineralisation and torrefaction to improve the properties of biomass intended as a feedstock for fast pyrolysis

Transformation of Sorbitol to Biofuels by Heterogeneous Catalysis: Chemical and Industrial Considerations

Exploring untapped energy potential of urban solid waste

Contact Info

Product

Resources

About