Determination of olefins in pyrolysis oils from waste plastics and tires – Comparability of titration and chromatographic methods

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22320%2F25%3A43931442" target="_blank" >RIV/60461373:22320/25:43931442 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0016236125006453" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0016236125006453</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.fuel.2025.134921" target="_blank" >10.1016/j.fuel.2025.134921</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Determination of olefins in pyrolysis oils from waste plastics and tires – Comparability of titration and chromatographic methods

Popis výsledku v původním jazyce

Reliable, accurate, and cost-effective determination of olefins, which create the major hydrocarbon group in plastic pyrolysis oils (PPOs), is of significant importance. This step is essential for further valorizing PPOs as petrochemical feedstocks and reaching plastics circularity. Our study comprehensively investigated and compared three standardized methods widely used in refinery laboratories (FIA – ASTM D1319, Bromine number – ASTM D1159, and Iodine value (IV) – EN 14111). The results were benchmarked to those obtained using the recently developed GC × GC-FID method, which relies on the selective adsorption of olefins over Ag-SiO2. The methods for determining olefins were extensively validated using model compounds typical for PPOs and model samples with known olefin concentration. This knowledge has enhanced our understanding of the limitations of the methods studied for analyzing real samples. In the second step, the PPOs derived from mixed waste polyolefins and tires, along with their hydrotreated products and distilled fractions, were analyzed. Three alternatives to the IV method were tested, and the one utilizing a mercury (II) acetate catalyst proved to be the most accurate among all tested methods, providing the results in the shortest time (10 min). By combining this IV method with a straightforward preparation step to eliminate interferences, reliable information about olefin content in polyolefin-rich pyrolysis oils can be obtained.

Název v anglickém jazyce

Determination of olefins in pyrolysis oils from waste plastics and tires – Comparability of titration and chromatographic methods

Popis výsledku anglicky

Reliable, accurate, and cost-effective determination of olefins, which create the major hydrocarbon group in plastic pyrolysis oils (PPOs), is of significant importance. This step is essential for further valorizing PPOs as petrochemical feedstocks and reaching plastics circularity. Our study comprehensively investigated and compared three standardized methods widely used in refinery laboratories (FIA – ASTM D1319, Bromine number – ASTM D1159, and Iodine value (IV) – EN 14111). The results were benchmarked to those obtained using the recently developed GC × GC-FID method, which relies on the selective adsorption of olefins over Ag-SiO2. The methods for determining olefins were extensively validated using model compounds typical for PPOs and model samples with known olefin concentration. This knowledge has enhanced our understanding of the limitations of the methods studied for analyzing real samples. In the second step, the PPOs derived from mixed waste polyolefins and tires, along with their hydrotreated products and distilled fractions, were analyzed. Three alternatives to the IV method were tested, and the one utilizing a mercury (II) acetate catalyst proved to be the most accurate among all tested methods, providing the results in the shortest time (10 min). By combining this IV method with a straightforward preparation step to eliminate interferences, reliable information about olefin content in polyolefin-rich pyrolysis oils can be obtained.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20402 - Chemical process engineering

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Fuel

ISSN

0016-2361

e-ISSN

1873-7153

Svazek periodika

393

Číslo periodika v rámci svazku

1 August

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

11

Strana od-do

134921

Kód UT WoS článku

001442713400001

EID výsledku v databázi Scopus

2-s2.0-86000155571