Dechlorination during pyrolysis of plastics: The potential of stepwise pyrolysis in combination with metal sorbents

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F44555601%3A13520%2F22%3A43896879" target="_blank" >RIV/44555601:13520/22:43896879 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/62243136:_____/22:N0000013

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0378382022000662" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0378382022000662</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.fuproc.2022.107226" target="_blank" >10.1016/j.fuproc.2022.107226</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Dechlorination during pyrolysis of plastics: The potential of stepwise pyrolysis in combination with metal sorbents

Popis výsledku v původním jazyce

Pyrolysis liquid is a valuable product that could be re-introduced into the refinery or petrochemical industry following circular economy principles. However, halogens in the liquid product hinder this approach by causing corrosion of subsequent technologies. Dehalogenation is, therefore, a necessary step that aims to reduce halogen content below the set limit of 10 ppm. Research on this topic often includes contradictory results, and dehalogenation is still not widely used in large-scale operations. The present study explores the possibility of chlorine removal from a model plastic mixture, including 10% PVC utilizing various pyrolysis conditions, stepwise pyrolysis, and sorbents based on Ca(OH)2, Fe3O4, and Fe. Results suggest that it is not suitable to use sorbents in-situ as the captured Cl in the form of chlorides was released at higher temperatures increasing the chlorine content in the liquid products. The limit of 10 ppm for refinery introduction was reached by combining stepwise pyrolysis and sorbents ex-situ. Fe3O4 displayed the best efficiency, while its reduced form was the most efficient considering its low surface area. The obtained results are a necessary preliminary step for the development of a reliable dehalogenation procedure for municipal plastic waste being underway. ? 2022 Elsevier B.V.

Název v anglickém jazyce

Dechlorination during pyrolysis of plastics: The potential of stepwise pyrolysis in combination with metal sorbents

Popis výsledku anglicky

Pyrolysis liquid is a valuable product that could be re-introduced into the refinery or petrochemical industry following circular economy principles. However, halogens in the liquid product hinder this approach by causing corrosion of subsequent technologies. Dehalogenation is, therefore, a necessary step that aims to reduce halogen content below the set limit of 10 ppm. Research on this topic often includes contradictory results, and dehalogenation is still not widely used in large-scale operations. The present study explores the possibility of chlorine removal from a model plastic mixture, including 10% PVC utilizing various pyrolysis conditions, stepwise pyrolysis, and sorbents based on Ca(OH)2, Fe3O4, and Fe. Results suggest that it is not suitable to use sorbents in-situ as the captured Cl in the form of chlorides was released at higher temperatures increasing the chlorine content in the liquid products. The limit of 10 ppm for refinery introduction was reached by combining stepwise pyrolysis and sorbents ex-situ. Fe3O4 displayed the best efficiency, while its reduced form was the most efficient considering its low surface area. The obtained results are a necessary preliminary step for the development of a reliable dehalogenation procedure for municipal plastic waste being underway. ? 2022 Elsevier B.V.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20402 - Chemical process engineering

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2022

Kód důvěrnosti údajů

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

Název periodika

Fuel Processing Technology

ISSN

0378-3820

e-ISSN

0378-3820

Svazek periodika

231

Číslo periodika v rámci svazku

107226

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

11

Strana od-do

1-11

Kód UT WoS článku

000795076400007

EID výsledku v databázi Scopus

2-s2.0-85125728429