CO2 reduction by chars obtained by pyrolysis of real wastes: Low temperature adsorption and high temperature CO2 capture
In this work, the carbon dioxide capture of waste derived chars was investigated. The char samples were obtained by pyrolysis of municipal plastic waste, biomass and sewage sludge from agriculture at 400, 600 and 900 °C in nitrogen atmosphere. For further experiments, chars with a grain size between...
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-03-01
|
| Series: | Carbon Capture Science & Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2772656824001441 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850069223749976064 |
|---|---|
| author | N. Miskolczi N. Gao C. Quan A.T. Laszlo |
| author_facet | N. Miskolczi N. Gao C. Quan A.T. Laszlo |
| author_sort | N. Miskolczi |
| collection | DOAJ |
| description | In this work, the carbon dioxide capture of waste derived chars was investigated. The char samples were obtained by pyrolysis of municipal plastic waste, biomass and sewage sludge from agriculture at 400, 600 and 900 °C in nitrogen atmosphere. For further experiments, chars with a grain size between 0.315 mm and 1.50 mm were investigated. The CO2 uptake capacity of samples was tested at 40 °C through a 10 adsorption-desorption cycles using a mixture of 70 % nitrogen and 30 % carbon dioxide. The CO2 uptake capacity of the reference activated carbon was 3.71–3.90 mmol CO2/g, while that of the waste derived char samples varied between 0.76–2.33 mmol CO2/g depending on the pyrolysis temperature and the raw materials. Chars with large specific surface area obtained at 900 °C had the highest CO2 uptake capacity. Char obtained from municipal plastic waste at a pyrolysis temperature of 900 °C has the largest specific surface area. The biomass and sewage sludge derived chars contained alkali metals and earth metals in oxide form, therefore the possibility of their application for carbonization-calcination cycles was also investigated. In case of the high-temperature tests, the CO2 uptake took place at 750 °C, while the release at 900 °C. During the 10 cycles test, significant decrease in capacity up to the 5th cycle was found. The capacity of char obtained from agricultural sewage sludge was 18.68 mmol CO2/g in the first cycle, which decreased drastically to 2.88–2.96 mmol CO2/g after the 5th cycle. |
| format | Article |
| id | doaj-art-e5d79ef58da140529927ba29178dc793 |
| institution | DOAJ |
| issn | 2772-6568 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Carbon Capture Science & Technology |
| spelling | doaj-art-e5d79ef58da140529927ba29178dc7932025-08-20T02:47:49ZengElsevierCarbon Capture Science & Technology2772-65682025-03-011410033210.1016/j.ccst.2024.100332CO2 reduction by chars obtained by pyrolysis of real wastes: Low temperature adsorption and high temperature CO2 captureN. Miskolczi0N. Gao1C. Quan2A.T. Laszlo3Faculty of Engineering, Research Centre of Biochemical, Environmental and Chemical Engineering, MOL Department of Hydrocarbon and Coal Processing, University of Pannonia, Egyetem u. 10, H-8200 Veszprém, Hungary; Corresponding author.School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, 710049, PR ChinaSchool of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, 710049, PR China; Shaanxi Weihuanneng Technology Co. Ltd, Xi'an, 712044, ChinaFaculty of Engineering, Research Centre of Biochemical, Environmental and Chemical Engineering, MOL Department of Hydrocarbon and Coal Processing, University of Pannonia, Egyetem u. 10, H-8200 Veszprém, HungaryIn this work, the carbon dioxide capture of waste derived chars was investigated. The char samples were obtained by pyrolysis of municipal plastic waste, biomass and sewage sludge from agriculture at 400, 600 and 900 °C in nitrogen atmosphere. For further experiments, chars with a grain size between 0.315 mm and 1.50 mm were investigated. The CO2 uptake capacity of samples was tested at 40 °C through a 10 adsorption-desorption cycles using a mixture of 70 % nitrogen and 30 % carbon dioxide. The CO2 uptake capacity of the reference activated carbon was 3.71–3.90 mmol CO2/g, while that of the waste derived char samples varied between 0.76–2.33 mmol CO2/g depending on the pyrolysis temperature and the raw materials. Chars with large specific surface area obtained at 900 °C had the highest CO2 uptake capacity. Char obtained from municipal plastic waste at a pyrolysis temperature of 900 °C has the largest specific surface area. The biomass and sewage sludge derived chars contained alkali metals and earth metals in oxide form, therefore the possibility of their application for carbonization-calcination cycles was also investigated. In case of the high-temperature tests, the CO2 uptake took place at 750 °C, while the release at 900 °C. During the 10 cycles test, significant decrease in capacity up to the 5th cycle was found. The capacity of char obtained from agricultural sewage sludge was 18.68 mmol CO2/g in the first cycle, which decreased drastically to 2.88–2.96 mmol CO2/g after the 5th cycle.http://www.sciencedirect.com/science/article/pii/S2772656824001441pyrolysisbio-charCO2 capacityadsorptioncarbonization-calcination |
| spellingShingle | N. Miskolczi N. Gao C. Quan A.T. Laszlo CO2 reduction by chars obtained by pyrolysis of real wastes: Low temperature adsorption and high temperature CO2 capture Carbon Capture Science & Technology pyrolysis bio-char CO2 capacity adsorption carbonization-calcination |
| title | CO2 reduction by chars obtained by pyrolysis of real wastes: Low temperature adsorption and high temperature CO2 capture |
| title_full | CO2 reduction by chars obtained by pyrolysis of real wastes: Low temperature adsorption and high temperature CO2 capture |
| title_fullStr | CO2 reduction by chars obtained by pyrolysis of real wastes: Low temperature adsorption and high temperature CO2 capture |
| title_full_unstemmed | CO2 reduction by chars obtained by pyrolysis of real wastes: Low temperature adsorption and high temperature CO2 capture |
| title_short | CO2 reduction by chars obtained by pyrolysis of real wastes: Low temperature adsorption and high temperature CO2 capture |
| title_sort | co2 reduction by chars obtained by pyrolysis of real wastes low temperature adsorption and high temperature co2 capture |
| topic | pyrolysis bio-char CO2 capacity adsorption carbonization-calcination |
| url | http://www.sciencedirect.com/science/article/pii/S2772656824001441 |
| work_keys_str_mv | AT nmiskolczi co2reductionbycharsobtainedbypyrolysisofrealwasteslowtemperatureadsorptionandhightemperatureco2capture AT ngao co2reductionbycharsobtainedbypyrolysisofrealwasteslowtemperatureadsorptionandhightemperatureco2capture AT cquan co2reductionbycharsobtainedbypyrolysisofrealwasteslowtemperatureadsorptionandhightemperatureco2capture AT atlaszlo co2reductionbycharsobtainedbypyrolysisofrealwasteslowtemperatureadsorptionandhightemperatureco2capture |