Crucial correction of the Faix method for the determination of carbonyls in pyrolysis and hydrothermal liquefaction bio-oils with high nitrogen content

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22320%2F23%3A43926757" target="_blank" >RIV/60461373:22320/23:43926757 - isvavai.cz</a>

Result on the web

<a href="https://www.sciencedirect.com/science/article/pii/S0165237023002309" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0165237023002309</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jaap.2023.106086" target="_blank" >10.1016/j.jaap.2023.106086</a>

Result language

angličtina

Original language name

Crucial correction of the Faix method for the determination of carbonyls in pyrolysis and hydrothermal liquefaction bio-oils with high nitrogen content

Original language description

Accurate and reliable determination of carbonyl content in bio-oils from pyrolysis and hydrothermal liquefaction (HTL) of biomass is crucial not only for estimating the storage stability of the sample but also for creating an adequate design of the hydrotreatment process allowing long-term operation. The composition of bio-oils from various feedstocks can, however, significantly differ from woody bio-oils, which were utilized to develop the Faix method, the most frequently used for carbonyl determination. In this study, we present a limitation of this method when used for the analysis of bio-oils prepared from protein-rich biomass. These bio-oils are known to have a high nitrogen content, which can be present in the form of possibly interfering compounds. In this study, nitrogen interferences were identified, and a correction step mitigating the underestimation of carbonyl content was introduced. This novel approach was tested for 13 crude bio-oils prepared by pyrolysis or HTL from 10 different feedstocks with a wide range of nitrogen content. Besides crude bio-oils, five hydrotreated HTL oils from sewage sludge were also analyzed. For bio-oils or hydrotreated products with increased nitrogen content but containing less than 0.5 mmol/g of carbonyls, without the correction step, the method can provide zero and in extreme cases even negative values. Statistical analysis of results showed that the introduction of the correction step can be crucial for bio-oils containing more than 2 wt% of nitrogen and especially hydrotreated bio-oils from protein-rich biomass.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

20704 - Energy and fuels

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2023

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS

ISSN

0165-2370

e-ISSN

0165-2370

Volume of the periodical

173

Issue of the periodical within the volume

106086

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

7

Pages from-to

106086

UT code for WoS article

001051377200001

EID of the result in the Scopus database

2-s2.0-85165427003