Microwave pyrolysis-prepared engineering carbons from corn cobs and red mombin seeds towards xylene adsorption

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389013%3A_____%2F24%3A00588433" target="_blank" >RIV/61389013:_____/24:00588433 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61989100:27360/24:10255107 RIV/61989100:27640/24:10255107 RIV/61989100:27710/24:10255107

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0165237024002857?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0165237024002857?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jaap.2024.106630" target="_blank" >10.1016/j.jaap.2024.106630</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Microwave pyrolysis-prepared engineering carbons from corn cobs and red mombin seeds towards xylene adsorption

Popis výsledku v původním jazyce

High-quality biochars/activated carbons were prepared, optimizing individual parameters of energetically-save microwave pyrolysis (raw material loading - 20 vs. 60 g, nitrogen atmosphere - flow vs. batch, ZnCl2 activation) from two agricultural wastes - corn cobs, red mombin seeds. Most promising carbons were examined for gaseous xylene adsorption and showed higher sorption capacity (∼250–475 mgxylene· g−1) than commercial carbon (∼214 mgxylene· g−1). ZnCl2 activation of both raw materials reduces the fixed carbon content and increases volatiles in activated carbon, suggesting microwave pyrolysis of activated feedstock should take 25 min. While biochars are microporous materials with inhomogeneous low-surface mesopore/macropore network, activated carbons are highly microporous-mesoporous. ZnCl2 activation of both raw materials contributes to formation of extensive high-surface mesopore network (with pore-size < 20 nm) and enlargement of micropore-size, but does not affect the micropore volume. ZnCl2 activation increases H2 and decreases CH4 production. Microwave pyrolysis of larger raw material loading with ZnCl2 leads to CO2 increase. Best xylene adsorption capacity (475 mgxylene· g−1) was determined for activated carbon produced from 60 g loading of corn cobs in batch nitrogen atmosphere, showing the largest micropore volume, lowest surface polarity and medium rate of graphitization. Large micropore volume, low surface polarity and high rate of graphitization of carbon are xylene sorption capacity-determining factors.

Název v anglickém jazyce

Microwave pyrolysis-prepared engineering carbons from corn cobs and red mombin seeds towards xylene adsorption

Popis výsledku anglicky

High-quality biochars/activated carbons were prepared, optimizing individual parameters of energetically-save microwave pyrolysis (raw material loading - 20 vs. 60 g, nitrogen atmosphere - flow vs. batch, ZnCl2 activation) from two agricultural wastes - corn cobs, red mombin seeds. Most promising carbons were examined for gaseous xylene adsorption and showed higher sorption capacity (∼250–475 mgxylene· g−1) than commercial carbon (∼214 mgxylene· g−1). ZnCl2 activation of both raw materials reduces the fixed carbon content and increases volatiles in activated carbon, suggesting microwave pyrolysis of activated feedstock should take 25 min. While biochars are microporous materials with inhomogeneous low-surface mesopore/macropore network, activated carbons are highly microporous-mesoporous. ZnCl2 activation of both raw materials contributes to formation of extensive high-surface mesopore network (with pore-size < 20 nm) and enlargement of micropore-size, but does not affect the micropore volume. ZnCl2 activation increases H2 and decreases CH4 production. Microwave pyrolysis of larger raw material loading with ZnCl2 leads to CO2 increase. Best xylene adsorption capacity (475 mgxylene· g−1) was determined for activated carbon produced from 60 g loading of corn cobs in batch nitrogen atmosphere, showing the largest micropore volume, lowest surface polarity and medium rate of graphitization. Large micropore volume, low surface polarity and high rate of graphitization of carbon are xylene sorption capacity-determining factors.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10404 - Polymer science

Projekt

<a href="/cs/project/EF17_049%2F0008419" target="_blank" >EF17_049/0008419: Podpora mezisektorové spolupráce v oblasti snižování polutantů v životním prostředí a využití odpadů</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

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

1873-250X

Svazek periodika

181

Číslo periodika v rámci svazku

August

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

12

Strana od-do

106630

Kód UT WoS článku

001272772100001

EID výsledku v databázi Scopus

2-s2.0-85198531235