Pyrolysis of household coffee vis-a-vis tea waste: A detailed insight into physicochemical properties, kinetics, and thermodynamics study

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61988987%3A17310%2F24%3AA25038L7" target="_blank" >RIV/61988987:17310/24:A25038L7 - isvavai.cz</a>

Výsledek na webu

<a href="https://linkinghub.elsevier.com/retrieve/pii/S266682112400005X" target="_blank" >https://linkinghub.elsevier.com/retrieve/pii/S266682112400005X</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.ceja.2024.100587" target="_blank" >10.1016/j.ceja.2024.100587</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Pyrolysis of household coffee vis-a-vis tea waste: A detailed insight into physicochemical properties, kinetics, and thermodynamics study

Popis výsledku v původním jazyce

The present study compares the kinetics and thermodynamics of the pyrolysis process of coffee and tea waste with respect to their physicochemical properties to analyze their potential as an energy and carbon source. Coffee and tea waste exhibit a promising source as a biofuel that has gross calorific values of 22.7 MJ kg−1 and 20.2 MJ kg−1, with significant differences in the overall volatile conversion of 76 % and 65 %, and as final carbon with a yield of 22 % and 31 %, respectively. Kinetic analyses using isoconversional methods show a trend of activation energy and frequency factor with conversion for both samples, with a significant difference at a conversion beyond 0.6 due to the higher lignin content in coffee waste. The predicted master plots indicate complex pyrolysis kinetics for both samples. Furthermore, the reaction kinetics determined by the multivariate regression approach, assuming parallel independent reactions of the nth order applicable to all heating rates, provide the individual mass change and carbon yield of each reaction process that can be controlled using experimental conditions. Finally, the thermodynamic parameters indicate that the pyrolysis process of both coffee and tea waste is nonspontaneous and endothermic, and its reactivity increases with conversion.

Název v anglickém jazyce

Pyrolysis of household coffee vis-a-vis tea waste: A detailed insight into physicochemical properties, kinetics, and thermodynamics study

Popis výsledku anglicky

The present study compares the kinetics and thermodynamics of the pyrolysis process of coffee and tea waste with respect to their physicochemical properties to analyze their potential as an energy and carbon source. Coffee and tea waste exhibit a promising source as a biofuel that has gross calorific values of 22.7 MJ kg−1 and 20.2 MJ kg−1, with significant differences in the overall volatile conversion of 76 % and 65 %, and as final carbon with a yield of 22 % and 31 %, respectively. Kinetic analyses using isoconversional methods show a trend of activation energy and frequency factor with conversion for both samples, with a significant difference at a conversion beyond 0.6 due to the higher lignin content in coffee waste. The predicted master plots indicate complex pyrolysis kinetics for both samples. Furthermore, the reaction kinetics determined by the multivariate regression approach, assuming parallel independent reactions of the nth order applicable to all heating rates, provide the individual mass change and carbon yield of each reaction process that can be controlled using experimental conditions. Finally, the thermodynamic parameters indicate that the pyrolysis process of both coffee and tea waste is nonspontaneous and endothermic, and its reactivity increases with conversion.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10403 - Physical chemistry

Projekt

<a href="/cs/project/EF18_053%2F0017856" target="_blank" >EF18_053/0017856: Posílení vědeckých kapacit OU II</a><br>

Návaznosti

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

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název periodika

Chemical Engineering Journal Advances

ISSN

2666-8211

e-ISSN

—

Svazek periodika

—

Číslo periodika v rámci svazku

15 March 2024

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

13

Strana od-do

—

Kód UT WoS článku

001172572800001

EID výsledku v databázi Scopus

2-s2.0-85183502481