Production and separation of value-added compounds from pine wood using pyrolysis and biorefinery techniques

Mora, Mireia; Fàbregas, Esteve; Céspedes, Francisco; Bartrolı́, Jordi; Puy, Neus

doi:10.1016/j.fuproc.2022.107509

Cited by 8 publications

(4 citation statements)

References 40 publications

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“…The most prominent peak 3 belonged to syringic acid with t R 2.75 min and molecular ion 199 Da. Peak 4 was not definitely identified, but its molecular ion was 167 Da, which could belong to a homologue of vanillin (C 8 H 8 O 3 +CH 2 ) or 4‐propylguaiacol as mentioned in literature 13. Peak 5 with 197 Da molecular ion corresponds with acetosyringone.…”

Section: Resultsmentioning

confidence: 88%

Solid‐Phase Extraction of the Aromatic By‐Products Obtained by Fast Pyrolysis of Pretreated Lignocellulose

Meile

Jermolajeva²,

Volkova

et al. 2023

Chem Eng & Technol

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Pyrolysis is a recognized technology for lignocellulose conversion into bio‐based fuels, materials, and chemicals. In this work, pyrolysis liquids were obtained by fast pyrolysis of wood after pretreatment with diluted sulfuric acid. The pyrolysis liquids were separated by solid‐phase extraction with an anion exchange resin Lewatit VPOC 1074 as the stationary phase. The aromatic constituents of the pyrolysis liquids were adsorbed on the resin, while the sugar derivative fraction was eluted with water. Different desorption solvents were tested for batch and continuous elution of phenol derivatives. Most promising results were obtained for selective separation of phenol carboxylic acids by changing the ratio of water, methanol, and acetic acid in the solid‐phase extraction solvent system.

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Section: Resultsmentioning

confidence: 88%

Solid‐Phase Extraction of the Aromatic By‐Products Obtained by Fast Pyrolysis of Pretreated Lignocellulose

Meile

Jermolajeva²,

Volkova

et al. 2023

Chem Eng & Technol

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“…In a PPA wood smoke system, compounds might form that neutralize or silence each other. For instance, polyphenols are one major compound in the cold smoke that act as a decontaminant [ 21 , 22 , 64 ]. Polyphenols, as an anti-oxidant, might consume the oxidizing nitrous gasses, which are, on the other hand, the active compound in PPA [ 65 , 66 ].…”

Section: Discussionmentioning

confidence: 99%

Microbial Control of Raw and Cold-Smoked Atlantic Salmon (Salmo salar) through a Microwave Plasma Treatment

Weihe

Wagner²,

Schnabel³

et al. 2022

Foods

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The control of the pathogenic load on foodstuffs is a key element in food safety. Particularly, seafood such as cold-smoked salmon is threatened by pathogens such as Salmonella sp. or Listeria monocytogenes. Despite strict existing hygiene procedures, the production industry constantly demands novel, reliable methods for microbial decontamination. Against that background, a microwave plasma-based decontamination technique via plasma-processed air (PPA) is presented. Thereby, the samples undergo two treatment steps, a pre-treatment step where PPA is produced when compressed air flows over a plasma torch, and a post-treatment step where the PPA acts on the samples. This publication embraces experiments that compare the total viable count (tvc) of bacteria found on PPA-treated raw (rs) and cold-smoked salmon (css) samples and their references. The tvc over the storage time is evaluated using a logistic growth model that reveals a PPA sensitivity for raw salmon (rs). A shelf-life prolongation of two days is determined. When cold-smoked salmon (css) is PPA-treated, the treatment reveals no further impact. When PPA-treated raw salmon (rs) is compared with PPA-untreated cold-smoked salmon (css), the PPA treatment appears as reliable as the cold-smoking process and retards the growth of cultivable bacteria in the same manner. The experiments are flanked by quality measurements such as color and texture measurements before and after the PPA treatment. Salmon samples, which undergo an overtreatment, solely show light changes such as a whitish surface flocculation. A relatively mild treatment as applied in the storage experiments has no further detected impact on the fish matrix.

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“…Within the pyrolysis oil, these two chemicals are among the high-added-value oxygenates which are the most present in substantial amounts, namely acetol (7.4%), acetic acid (12%), and glycolaldehyde (13%) [33,34]. Due to the poor thermal stability of the pyrolysis oil, direct distillation of these oxygenates is however not possible.…”

Section: Introductionmentioning

confidence: 99%

“…Several methods have already been investigated for separating different compounds from the aqueous fractions of pyrolysis oil. The most common technique is liquid-liquid extraction with organic solvents or water extraction to extract the phenolic compounds from the bio-oil [33,35]. Liquid-liquid reactive extractions have been extensively studied for the recovery of acetic acid from aqueous solutions [36,37].…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of a Valorisation-Oriented Hybrid Process for the Bio-Oil-Related Separation of Acetol and Acetic Acid

Chilev,

Lamari,

Langlois

2023

Preprint

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Biomass as a whole offers a more diverse potential for valorisation than any other renew-able energy source. As one of the stages in the separation of bio-oil involves the liquid mixture of acetol and acetic acid, and as both components are particularly well suited for valorisation, a hybrid method has been developed for their separation with a high purity level through an approach combining liquid-liquid extraction and rectification. In order to design and simulate the flowsheet, the ChemCAD 7.0 simulation software has been used. Sensitive analyses have been carried out to investigate the influence of the different pa-rameters in the rectification columns such as the reflux ratio, the feed stage location, and the vapour/bottom molar flow ratio. The effect of different extractants and of their excess on the separation process as well as the possibility of regenerating the extractant has also been studied. Tri-n-octylamine has accordingly been selected as a separating agent which has been fully recycled. The end result for separating an initial 48/52 wt% ace-tol/acetic-acid liquid mixture has been acetol with a purity of 99.4 wt% and acetic acid with a purity of 100 wt%.

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Production and separation of value-added compounds from pine wood using pyrolysis and biorefinery techniques

Cited by 8 publications

References 40 publications

Solid‐Phase Extraction of the Aromatic By‐Products Obtained by Fast Pyrolysis of Pretreated Lignocellulose

Solid‐Phase Extraction of the Aromatic By‐Products Obtained by Fast Pyrolysis of Pretreated Lignocellulose

Microbial Control of Raw and Cold-Smoked Atlantic Salmon (Salmo salar) through a Microwave Plasma Treatment

Numerical Simulation of a Valorisation-Oriented Hybrid Process for the Bio-Oil-Related Separation of Acetol and Acetic Acid

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