Increasing the Reactivity of Solid Fuel with Liquid Hydrocarbons from the Pyrolysis of Waste Tires

Albina Misyukova, Askar Asilbekov, Aleksander Matveev, Kirill Larionov () and Konstantin Slyusarskiy
Additional contact information
Albina Misyukova: School of Energy & Power Engineering, Tomsk Polytechnic University, Lenina Prospekt 30, Tomsk 634050, Russia
Askar Asilbekov: School of Energy & Power Engineering, Tomsk Polytechnic University, Lenina Prospekt 30, Tomsk 634050, Russia
Aleksander Matveev: School of Energy & Power Engineering, Tomsk Polytechnic University, Lenina Prospekt 30, Tomsk 634050, Russia
Kirill Larionov: School of Energy & Power Engineering, Tomsk Polytechnic University, Lenina Prospekt 30, Tomsk 634050, Russia
Konstantin Slyusarskiy: School of Energy & Power Engineering, Tomsk Polytechnic University, Lenina Prospekt 30, Tomsk 634050, Russia

Energies, 2025, vol. 18, issue 20, 1-17

Abstract: Utilization of waste tires via pyrolysis is a promising solution. The liquid hydrocarbons generated during this process could be used for enhancing low-reactivity coals for energy application. Current study investigates oxidation and combustion characteristics (including composition of gaseous combustion products) of low-reactivity coal mixed with liquid hydrocarbons from pyrolysis of waste tires with a concentration up to 20%wt at 700 °C. The oxidation tests via TG-analyzer revealed that at heating rates up to 10 °C/min, the process had one stage, associated with combined oxidation of coal-liquid hydrocarbons mixture. Starting from 10 °C/min the second stage occurred at temperature ~400 °C due to evaporation of light components of the mixture. Combustion tests at experimental setup at 700 °C revealed almost linear increase in fuel reactivity, expressed into decline in ignition delay time of mixtures (up to 71.6%) with increasing concentration of liquid hydrocarbons, while flame and diffusion combustion times were, in contrast, increasing (by up to 69.5%). Increasing concentration of additives from 2.5 to 20%wt resulted not only in change in the form of obtained mixture but also changed the combustion mechanism from predominantly heterogeneous smoldering to majorly homogeneous gas-phase ignition and combustion. Gas-phase combustion products concentration curves generally complimented previously observed peculiarities of combustion. Increased CO and NO x concentrations in combustion products of coal mixed with liquid hydrocarbons revealed necessity in additional tailoring of burner characteristics for mitigating these effects. The compromise composition of mixture was found to include 10%wt of liquid hydrocarbons for enabling quick gas-phase ignition while maintaining moderate level of combustion products emissions.

Keywords: coal; pyrolysis oil; rubber; pyrolysis; thermal analysis; hydrocarbons (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2025
References: Add references at CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/1996-1073/18/20/5494/pdf (application/pdf)
https://www.mdpi.com/1996-1073/18/20/5494/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:18:y:2025:i:20:p:5494-:d:1774207

Access Statistics for this article

Energies is currently edited by Ms. Cassie Shen

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().