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

Result code in 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>

Result on the web

<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>

Result language

angličtina

Original language name

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

Original language description

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.

Czech name

—

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

—

OECD FORD branch

20402 - Chemical process engineering

Project

—

Continuities

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

Publication year

2025

Confidentiality

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

Name of the periodical

Fuel

ISSN

0016-2361

e-ISSN

1873-7153

Volume of the periodical

393

Issue of the periodical within the volume

1 August

Country of publishing house

GB - UNITED KINGDOM

Number of pages

11

Pages from-to

134921

UT code for WoS article

001442713400001

EID of the result in the Scopus database

2-s2.0-86000155571