Carbon black recovery from waste tire pyrolysis by demineralization: Production and application in rubber compounding

Waste Management
Juan Daniel MartínezJosé Manuel López

Abstract

Pyrolysis offers the possibility to convert waste tires into liquid and gaseous fractions as well as a carbon-rich solid (CBp), which contains the original carbon black (CB) and the inorganic compounds used in tire manufacture. Whilst both liquid and gaseous fractions can be valorized without further processing, there is a general consensus that CBp needs to be improved before it can be considered a commercial product, seriously penalizing the pyrolysis process profitability. In this work, the CBp produced in a continuous pyrolysis process was demineralized (chemical leaching) with the aim of recovering the CB trapped into the CBp and thus, producing a standardized CB product for commercial purposes. The demineralization process was conducted by using cheap and common reagents (HCl and NaOH). In this sense, the acid treatment removed most of the mineral matter contained in the CBp and concentration was the main parameter controlling the demineralization process. An ash content of 4.9 wt% was obtained by using 60 min of soaking time, 60 °C of temperature, 10 mL/g of reagent/CBp ratio and HCl 4 M. The demineralized CBp (dCBp) showed a carbon content of 92.9 wt%, while the FRX analysis indicated that SiO2 is the major component in...Continue Reading

Citations

Mar 11, 2021·Journal of Environmental Management·William Urrego-YepesJuan Daniel Martínez
Mar 28, 2021·The Science of the Total Environment·Junqing XuGuangming Li
Apr 17, 2021·Waste Management & Research : the Journal of the International Solid Wastes and Public Cleansing Association, ISWA·Junqing XuGuangming Li
Oct 17, 2021·Environmental Science and Pollution Research International·Svetlana Dabic-MileticSelman Karagoz
Dec 1, 2021·Journal of the Air & Waste Management Association·Kirill B LarionovVladimir E Gubin

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