Towards the thermal utilisation of non-tyre rubbers – Macroscopic and chemical changes while approaching the process temperature

Szentannai, Pál; Bozi, János; Jakab, Emma; Ősz, János; Szűcs, Tibor

doi:10.1016/j.fuel.2015.04.037

Cited by 8 publications

(5 citation statements)

References 15 publications

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“…The macroscopic combustion experiments were performed in a programmable oven described in more detail by Szentannai et al (2015). In contrast to the TG measurements, the particles used in the macroscopic combustion experiments were not ground.…”

Section: Methodsmentioning

confidence: 99%

Developing an all-round combustion kinetics model for nonspherical waste-derived solid fuels

Szűcs

Szentannai

2020

Chem. Pap.

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The utilization of challenging solid fuels in the energy industry (especially the ones derived from wastes) has a big priority nowadays, as it is a valid option to keep the recent EU directive related to the decrease of landfills. However, there are serious technical challenges, connecting to the lack of knowledge about the behavior of these fuels in the combustion chamber. This paper discusses the specific aspects of developing particle models concerning the combustion of these non-conventional fuels. A new modeling approach is presented, using which it is possible to develop an all-round particle model that includes every significant influencing process. Moreover, it does not have any restrictions regarding the shape, size and the origin of the particle. As an integral component of this model, the distinctive aspects of intrinsic reaction kinetics related to waste fuels are presented as well.

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Section: Methodsmentioning

confidence: 99%

Developing an all-round combustion kinetics model for nonspherical waste-derived solid fuels

Szűcs

Szentannai

2020

Chem. Pap.

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“…Waste tyres are managed in various approaches to ensure the by-product can be used as a new energy sources or produced as new material. Szentannai et al (2015) and Lopez et al (2017) investigated ways to reclaim the virgin components and recover energy and new materials from waste tyres through the high technology oriented and excessive heat processes such as the de-vulcanisation, pyrolysis, gasification,…”

Section: Waste Tyre Management Approachmentioning

confidence: 99%

Handbook of Research on Resource Management for Pollution and Waste Treatment

2020

Advances in Environmental Engineering and Green Technologies

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Increasing traffic requires durable and low-noise road surfaces. Urban residents complain about excessive traffic noise that leads to an unhealthy environment. Understanding techniques to produce durable, low-noise pavement has led to the development of rubberized concrete block pavement (RCBP) and rubberized asphalt concrete pavement (RACP). The chapter examines morphology and chemical properties of waste tyre rubber using FESEM, XRF, and TGA/DTA.

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“…An electrically heated oven equipped with a digital balance for measuring continuously the mass loss of the sample particles was used in the example measurement, as introduced in detail elsewhere [28]. The internal arrangement of the oven was kept as simple as possible; hence, the next step of the procedure requires its geometrical modeling.…”

Section: Macroscopic Measurementmentioning

confidence: 99%

Determining the mass-related reaction effectiveness factor of large, nonspherical fuel particles for bridging between intrinsic and apparent combustion kinetics

Szűcs

Szentannai

2019

J Therm Anal Calorim

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The utilization of challenging solid fuels in the energy industry is urged by environmental requirements. The combustion kinetics of these fuel particles differs markedly from that of pulverized coal, mainly because of their larger sizes, irregular (nonspherical) shapes, and versatile internal pore structures. Although the intrinsic reaction kinetic measurements on very small amounts of finely ground samples of these particles are mostly available, a bridge toward their apparent reaction modeling is not evident. In this study, a method is introduced to build this bridge, the goodness of which was proved on the example of an industrially relevant biofuel. To do this, the results of a macroscopic combustion measurement with real samples in a well-modelable environment have to be used, and for considering some not negligible effects, 3D CFD modeling of the experimental environment is also to be applied. The outcome is the mass-related reaction effectiveness factor as a function of the rate of conversion. This variable can be considered as the active fraction of the entire particle mass on its periphery, and it can be used as the crucial element in modeling the combustion process of the same particle under other circumstances by including the actual boundary conditions. Another advantage of this method is its covering inherently the entire combustion process (water and volatile release, and char combustion) and also its applicability for reactors utilizing bigger particles like fluidized bed combustors.

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Towards the thermal utilisation of non-tyre rubbers – Macroscopic and chemical changes while approaching the process temperature

Abstract: 9 This paper presents important changes in the basic fuel properties of non-tyre rubber wastes during 10heating from ambient to the temperature of the thermal conversion reactor. Experiments were carried out 11

Cited by 8 publications

References 15 publications

Developing an all-round combustion kinetics model for nonspherical waste-derived solid fuels

Developing an all-round combustion kinetics model for nonspherical waste-derived solid fuels

Handbook of Research on Resource Management for Pollution and Waste Treatment

Determining the mass-related reaction effectiveness factor of large, nonspherical fuel particles for bridging between intrinsic and apparent combustion kinetics

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