Pyrolysis and char reactivity of a poor-quality refuse-derived fuel (RDF) from municipal solid waste

Abstract

• Increasing both heating rate and peak temperature led to more reactive RDF chars. 2• The co-pyrolysis of the RDF and two-phase olive mill waste was also investigated. 3• The reactivity of resulting TPOMW chars increased in the presence of RDF. 4• The carbonization efficiency of TPOMW was improved in the presence of RDF. 5• Results motivate further studies on the use of this RDF as pyrolysis additive.The present study focuses on analyzing the pyrolysis and combustion behaviors of a refuse-8 derived fuel (RDF), which is generated in a MSW treatment plant located in Zaragoza (Spain). 9Pyrolysis experiments were carried out in a TGA apparatus and a fixed-bed reactor at different 10 peak temperatures (400 and 600 °C) and heating rates (5 and 40 °C min -1 ). The reactivity towards 11 oxygen of produced chars was also measured in the same TGA device at a heating rate of 10 °C 12 min -1 and a final temperature of 800 °C. Pyrolysis results were significantly affected by peak 13 temperature and heating rate. The found effect of peak temperature on char and fixed-carbon 14 yields as well as on measured properties (H:C and O:C ratios, BET surface area and average pore 15 diameter) was in agreement with previous studies. However, the effect of heating rate, especially 16 on the release rate of volatiles, could be explained by a change in the pyrolysis reactions scheme. 17The RDF-derived chars obtained at the highest heating rate showed a higher reactivity in air. In 18 addition, an increase in peak temperature also led to a higher reactivity. This result can indicate 19that the carbon present in the RDF-derived char is dispersed within an ash matrix containing a 20 high number of active sites, the distribution of which could be improved when heating rate (and, 21 to a lesser extent, peak temperature) is increased. The addition of 10 wt. % RDF to two-phase 22 olive mill waste prior to slow pyrolysis led to an apparent increase in the carbonization efficiency 23as well as to an enhancement of the resultant char's reactivity in air.

Effects of low-temperature pretreatment on enhancing properties of refuse-derived fuel via microwave irradiation

“…With the increase of the final microwave irradiation temperature, the pore surface area, total pore volume and mean diameter were significantly increased. In addition, the increase of surface area was in good agreement with Manya et al (2015). They reported a marked increase in pore surface area when the peak temperature was increased during pyrolysis of poor quality RDF.…”

Effects of Pressure and the Addition of a Rejected Material from Municipal Waste Composting on the Pyrolysis of Two-Phase Olive Mill Waste

“…In a recent publication, Manyà et al 33 have reported on a noticeable increase in the fixedcarbon yield (i.e., carbonization efficiency) for the pyrolysis of OW at 600 °C and atmospheric pressure with 10 wt. % of a rejected material from MSW composting (RC) in the physical mixture.…”

Evaluating Circular Economy under a Multi-Parametric Approach: A Technological Review

“…The best combustion characteristic was obtained when the dosage of chlorine depleted pyrolyzate was 10% w/w RDF [36]. The same optimum 10 wt.% RDF-derived char addition to two-phase olive mill waste prior to slow pyrolysis was reported by Manya et al [37], that supported an apparent increase in the carbonization efficiency as well as an enhancement of the resultant char's reactivity in air [37].…”