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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20704 - Energy and fuels

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název periodika

JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS

ISSN

0165-2370

e-ISSN

0165-2370

Svazek periodika

173

Číslo periodika v rámci svazku

106086

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

7

Strana od-do

106086

Kód UT WoS článku

001051377200001

EID výsledku v databázi Scopus

2-s2.0-85165427003