Pyrolysis behaviors of various biomasses

Părpăriţă, Elena; Brebu, Mihai; Uddin, Md. Azhar; Yanık, Jale; Vasile, Cornelia

doi:10.1016/j.polymdegradstab.2014.01.005

Cited by 68 publications

(15 citation statements)

References 27 publications

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“…The pyrolysis of biomass normally shows multi-stage reaction patterns that can be briefly explained by the overlapping decomposition of its main components extractives, hemicellulose, cellulose, lignin [35]. At this heating rate, the decomposition pathway of GSs starts at around 200 ºC with the hydrolysis of certain extractives [36] which are less stable and start to degrade at lower temperatures due to their higher volatility [35,37]. They then follow the main decomposition of hemicellulose at between 250 ºC and 350…”

Section: Thermogravimetric Analysismentioning

confidence: 99%

“…ºC [37], and the main devolatilization of the cellulose component at between 350 ºC and 400 ºC [37]. At higher temperatures, decomposition of the strongest bonds in the lignin takes place up to 600 ºC [34,38].…”

Section: Thermogravimetric Analysismentioning

confidence: 99%

“…At higher temperatures, decomposition of the strongest bonds in the lignin takes place up to 600 ºC [34,38]. Finally, at the higher temperatures, only advanced charring processes continue with a very low reaction rate [37]. The residual weight observed is about 32.1 wt% and a weight of 36 wt% at 550 ºC was obtained.…”

Section: Thermogravimetric Analysismentioning

confidence: 99%

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Drop-in biofuels from the co-pyrolysis of grape seeds and polystyrene

Sanahuja‐Parejo

Veses

Navarro

et al. 2019

Chemical Engineering Journal

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Co-pyrolysis of grape seeds and polystyrene was conducted in a fixed-bed reactor, followed by an analysis of the organic phase for possible further application as a drop-in fuel. Significant positive synergistic effects were found with the addition of polystyrene (5-40 wt%) to the conventional pyrolysis of grape seeds. There was a considerable improvement in the organic phase yield, in particular, reaching values over 80 wt%, markedly higher than those obtained from conventional pyrolysis (61 wt%). Fuel properties of the bio-oil were also upgraded, with a decrease in oxygen content and an increase in the heating value. An organic bio-oil fraction with pH values ranging from 5.4 to 6.2 was obtained, reducing the issues associated with handling bio-oils obtained from common pyrolysis of lignocellulosic biomass, usually ranging between 2 and 3. Finally, an increment in the desired compounds, mainly aromatics, was also attained, while at the same time achieving a low content of undesired compounds, such as phenols. It was demonstrated that polystyrene can act as a H 2-donor, favoring oligomerization, cyclation and hydrodeoxygenation reactions into aromatic compounds.

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Section: Thermogravimetric Analysismentioning

confidence: 99%

Section: Thermogravimetric Analysismentioning

confidence: 99%

See 1 more Smart Citation

Drop-in biofuels from the co-pyrolysis of grape seeds and polystyrene

Sanahuja‐Parejo

Veses

Navarro

et al. 2019

Chemical Engineering Journal

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“…The carbon content had a large effect on the methane yield when using spruce (softwood). This is believed to be an effect of the high lignin content of Norway spruce (27.6 wt% to 29.4 wt% dry basis) (Părpăriţă et al 2014). This leads to a higher concentration of complex phenols with higher molecular weights and an increased carbon content in spruce bio-oil (Stefanidis et al 2014).…”

Section: Effect Of the Pyrolysis Temperature On The Biomethane Yield During Anaerobic Digestionmentioning

confidence: 99%

“…In contrast, the carbon content had little effect on the methane yield when using birch (hardwood), although there was a major difference in the carbon content between the APLs pre-treated at different temperatures. This is explained by the lower lignin content (21 wt% dry basis) and by the more complex lignin structures in hardwood (syringil-guaiacyl lignin) compared to softwood (guaiacyl lignin) (Fahmi et al 2008;Părpăriţă et al 2014). The more complex lignins found in hardwoods have a lower decomposition rate, which yields less inhibitory APL (Torri et al 2016).…”

Section: Effect Of the Pyrolysis Temperature On The Biomethane Yield During Anaerobic Digestionmentioning

confidence: 99%

Improving carbon product yields in biocarbon production by combining pyrolysis and anaerobic digestion

Wijst¹,

Ghimire

Bergland

et al. 2021

BioRes

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Solid carbon is an important raw material in industrial processes. Most of the charcoal produced today is via conventional carbonization, which suffers from huge carbon losses due to system inefficiency. Intermediate pyrolysis is principally similar to conventional carbonization and produces biocarbon while capturing the off gasses; among these off gasses is aqueous condensate, which is difficult to utilize due to the high water content and low energy content. This fraction can contain up to 25% of the carbon from feedstock, so utilization of this fraction is important for good overall carbon balance. Anaerobic digestion can be a promising tool for utilizing the carbon in the aqueous condensate by converting it into biomethane. Here, birch and spruce wood were pyrolyzed and the biomethane potential for the aqueous condensates was tested. The mass and carbon balances of the pyrolysis products of birch and spruce at two pyrolysis temperatures were performed, and biocarbon carbon yields ranging from 42% to 54% were obtained. Anaerobic digestion of the aqueous phases collected from the pyrolysis process was performed, with carbon recovery yields between 44% and 59%. A total carbon recovery of 77.8% to 85.7% was obtained, and the primary carbon losses were identified.

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