2 research outputs found
Characterization and Use of Char Produced from Pyrolysis of Post-Consumer Mixed Plastic Waste
In this work, the pyrolysis of post-consumer mixed plastic waste (polypropylene (PP),
polystyrene (PS) and polyethylene film (PE)) is carried out. The solid product of the pyrolysis is
characterized and tested for its use as adsorbent of lead present in aqueous media. The pyrolysis
temperature has a great influence on the solid product yield, decreasing when the temperature increases. The highest yield to solid product obtained is from the pyrolysis of film at lower temperature
(450 âŠC), reaching almost 14%. The results of product solid characterization reveal that the carbon,
hydrogen and nitrogen content decreases with increasing pyrolysis temperature. Furthermore, both
the ash and the volatile content are related to the pyrolysis temperature. The ash content is higher
when the pyrolysis temperature is higher, while when the temperature increases, a solid product with
lower volatile content is obtained. In respect to specific surface area, a higher pyrolysis temperature
improves the properties of the solid product as an adsorbent. The adsorption capacity increases as
the pyrolysis temperature increases, with the highest value of 7.91 mg/g for the solid obtained in the
pyrolysis at 550 âŠC. In addition, adsorption capacity increases as the initial concentration of lead rises,
reaching a maximum value close to 26 mg/g for an initial concentration of 40 mg/L. The Sips model
is the one that best reproduces the experimental results of the adsorption process equilibrium study.PID2019-108826RB-I00/SRA (State Research
Agency)/10.13039/50110001103
On the use of plastic precursors for preparation of activated carbons and their evaluation in CO2 capture for biogas upgrading: a review
Acknowledgements
This paper has received funds from the project PID2019.108826RB.
I00 financied by MCIN/ AEI /10.13039/501100011033. Funding for
open access charge: Universidad de Granada / CBUA. Our gratitute to
Prof. Fernando Gonz Ìalez-Caballero for his support and fruitful com-
ments during the preparation of the manuscript.In circular economy, useful plastic materials are kept in circulation as opposed to being landfilled, incinerated, or leaked into the natural environment. Pyrolysis is a chemical recycling technique useful for unrecyclable plastic wastes that produce gas, liquid (oil), and solid (char) products. Although the pyrolysis technique has been extensively studied and there are several installations applying it on the industrial scale, no commercial applications for the solid product have been found yet. In this scenario, the use of plastic-based char for the biogas upgrading may be a sustainable way to transform the solid product of pyrolysis into a particularly beneficial material. This paper reviews the preparation and main parameters of the processes affecting the final textural properties of the plastic-based activated carbons. Moreover, the application of those materials for the CO2 capture in the processes of biogas upgrading is largely discussed.This paper has received funds from the project PID2019.108826RB.I00 financied by MCIN/ AEI /10.13039/501100011033.Funding for
open access charge: Universidad de Granada / CBU