Modified porous carbon from waste printed circuit boards for enhanced adsorption of carbon dioxide in abandoned mines

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F25%3A10497888" target="_blank" >RIV/00216208:11310/25:10497888 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=a9s0adhZB-" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=a9s0adhZB-</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jece.2025.115790" target="_blank" >10.1016/j.jece.2025.115790</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Modified porous carbon from waste printed circuit boards for enhanced adsorption of carbon dioxide in abandoned mines

Popis výsledku v původním jazyce

Waste printed circuit boards (PCBs) present significant environmental challenges due to their toxic and varied composition. Current recycling methods focus on metal recovery, leaving nonmetals underutilised. This study converts such nonmetals into nitrogen-doped porous carbons with high carbon dioxide adsorption capacity. Waste PCB and pure epoxy samples were processed through milling, sieving, mixing with KOH and urea, and activation in a tubular furnace. Scanning electron microscope images confirm the presence of glass fibres in PCBderived carbon, resulting in smaller pore development than in the epoxy-derived activated carbon. Nitrogen adsorption analyses reveal that PCBs activated at 700 °C exhibit lower surface area (180 m2/g) and micropore volume (0.07 cm3/g) compared to pure epoxy (1381 m2/g and 0.58 cm3/g, respectively). CO2 adsorption capacity (20 °C, 1 bar) is highest for epoxy-derived carbon (2.30 mmol/g), decreasing for PCB-derived carbons from 1.62 mmol/g to 0.06 mmol/g with increasing activation temperature (600-800 °C). PCB-derived porous carbon does show greater affinity for CO2 than the epoxy derived carbon through a higher isosteric heat of adsorption (approx. 24 kJ/mol vs approx. 16 kJ/mol) and higher amount of CO2 adsorbed per surface area surface area (3.3 µmol/m2 vs 1.7 µmol/m2). These carbons offer potential for enhanced CO2 storage in abandoned mines, providing a sustainable solution for PCB waste management and CO2 emission mitigation.

Název v anglickém jazyce

Modified porous carbon from waste printed circuit boards for enhanced adsorption of carbon dioxide in abandoned mines

Popis výsledku anglicky

Waste printed circuit boards (PCBs) present significant environmental challenges due to their toxic and varied composition. Current recycling methods focus on metal recovery, leaving nonmetals underutilised. This study converts such nonmetals into nitrogen-doped porous carbons with high carbon dioxide adsorption capacity. Waste PCB and pure epoxy samples were processed through milling, sieving, mixing with KOH and urea, and activation in a tubular furnace. Scanning electron microscope images confirm the presence of glass fibres in PCBderived carbon, resulting in smaller pore development than in the epoxy-derived activated carbon. Nitrogen adsorption analyses reveal that PCBs activated at 700 °C exhibit lower surface area (180 m2/g) and micropore volume (0.07 cm3/g) compared to pure epoxy (1381 m2/g and 0.58 cm3/g, respectively). CO2 adsorption capacity (20 °C, 1 bar) is highest for epoxy-derived carbon (2.30 mmol/g), decreasing for PCB-derived carbons from 1.62 mmol/g to 0.06 mmol/g with increasing activation temperature (600-800 °C). PCB-derived porous carbon does show greater affinity for CO2 than the epoxy derived carbon through a higher isosteric heat of adsorption (approx. 24 kJ/mol vs approx. 16 kJ/mol) and higher amount of CO2 adsorbed per surface area surface area (3.3 µmol/m2 vs 1.7 µmol/m2). These carbons offer potential for enhanced CO2 storage in abandoned mines, providing a sustainable solution for PCB waste management and CO2 emission mitigation.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10403 - Physical chemistry

Projekt

<a href="/cs/project/EF15_003%2F0000417" target="_blank" >EF15_003/0000417: Centrum pro cílenou syntézu a aplikace perspektivních materiálů</a><br>

Návaznosti

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

Journal of Environmental Chemical Engineering

ISSN

2213-2929

e-ISSN

2213-3437

Svazek periodika

13

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

9

Strana od-do

115790

Kód UT WoS článku

001428275700001

EID výsledku v databázi Scopus

2-s2.0-85217705291