A New Pyrolysis of Metal Hydroxide-Mixed Waste Biomass with Effective Chlorine Removal and Efficient Heat Recovery

Hayashi, Shigeya; Amano, Hiroshi; Niki, Toyoaki; Yokota, Morihisa; Mae, Kazuhiro

doi:10.1021/ie1008234

Cited by 13 publications

(6 citation statements)

References 16 publications

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“…This indicates that the introduction of CuAl-LDH promotes the linear unsaturated structures to translate into the ring-shaped conjugated structures. After that, more compact char layers are formed through the cross-linking reactions during combustion, which can increase diffusion control of the oxygen and suppress smoke production, leading to an increase in the yields of char and a decrease in the released amount of smoke …”

Section: Resultsmentioning

confidence: 99%

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Catalytic Dechlorination and Charring Reaction of Polyvinyl Chloride by CuAl Layered Double Hydroxide

et al. 2018

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The catalytic effects of CuAl layered double hydroxide (CuAl-LDH) on dechlorination and carbonization of polyvinyl chloride (PVC) during pyrolysis were investigated. The thermal degradation and combustion behaviors were researched via thermogravimetric analysis (TGA) and cone calorimetry (CONE). The released gases were evaluated in detail by thermogravimetric analysis coupled with Fourier transform infrared spectrometry (TGA-FTIR). Subsequently, elemental analysis and scanning electron microscopy-energy dispersive spectrometry (SEM-EDS) were employed to fully characterize the solid residues. The results of TGA and CONE showed that the addition of CuAl-LDH brought about the PVC degradation earlier and the char residues increase significantly. Moreover, the results of TGA-FTIR, elemental analysis, SEM-EDS, and Raman analysis revealed that the existence of CuAl-LDH accelerated the dehydrochlorination and promoted the char formation of PVC. CuAl-LDH maybe a potential catalyst applied to treat PVC waste into carbon materials to realize material and chemical recycling, which possess tremendous environmental and economic benefits.

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Section: Resultsmentioning

confidence: 99%

“…After that, more compact char layers are formed through the cross-linking reactions during combustion, which can increase diffusion control of the oxygen and suppress smoke production, leading to an increase in the yields of char and a decrease in the released amount of smoke. 34 3.4. SEM-EDS Analysis.…”

Section: Methodsmentioning

confidence: 99%

Catalytic Dechlorination and Charring Reaction of Polyvinyl Chloride by CuAl Layered Double Hydroxide

et al. 2018

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“…This finding could be explained by the fact that, at lower temperature, the higher release of volatiles during the primary devolatilization catalyzed by the AAEM species is not compensated by [53] observed that the addition of 0.24% and 0.48% of KOH during the co-pyrolysis of mixtures of bio-oil and biomass (aspen wood) at 600°C led to an increase in the mass yield of biochar of 22.3% and 25.2%, respectively. The effect of peak temperature was analyzed by Hayashi et al [54] during the pyrolysis of mixtures of wood and PVC catalyzed by alkaline and alkaline earth metal hydroxides. One of the major findings reported in the study by Hayashi et al [54] was that the increase in char yield was affected by peak temperature.…”

Section: Resultsmentioning

confidence: 99%

“…The effect of peak temperature was analyzed by Hayashi et al [54] during the pyrolysis of mixtures of wood and PVC catalyzed by alkaline and alkaline earth metal hydroxides. One of the major findings reported in the study by Hayashi et al [54] was that the increase in char yield was affected by peak temperature. More in detail and in line with the results reported here, the addition of hydroxides at temperatures of 300 and 400°C led to a decrease in char yield.…”

Section: Resultsmentioning

confidence: 99%

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

Manyà

García-Ceballos

Azuara

et al. 2015

Fuel Processing Technology

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• 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.

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“…Nowadays, scrupulous attention is paid to environmental protection . From a great number of pollution sources, industrial waste has the most detrimental effect on the environment. , The quantities of such waste production are usually quite high; therefore, it is critical to develop efficient ways of recycling it or reducing the level of its hazardous influence on the environment to permissible values.…”

Section: Introductionmentioning

confidence: 99%

Oil-Filled Cryogels: New Approach for Storage and Utilization of Liquid Combustible Wastes

Vershinina

Glushkov

Nigay

et al. 2019

Ind. Eng. Chem. Res.

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A method of preparing oil-filled cryogels on the basis of an aqueous solution of poly(vinyl alcohol) (PVA) has been elaborated. The stability of primary oil emulsions and their rheological properties were analyzed for 30 days, as well as the mechanical properties of gel fuel pellets (obtained after 15 cycles of freezing/thawing of oil emulsions) with size of 20 mm for a group of compositions: 100−20 vol % aqueous solution of PVA (5, 10 wt %) + 0−80 vol % oil. The rheological behavior of non-Newtonian oil emulsions is described by the Herschel−Bulkley model. The elastic moduli and the tensile strength of fuel pellets of different component compositions range from 0.7 to 7.6 kPa and from 2.5 to 60 kPa, respectively. The oleophilic properties are more distinct for gel fuel prepared from oil emulsions with a higher content of the dispersed phase and lower concentrations of the polymer in the dispersion medium. The ignition mechanism and combustion characteristics have been established for processes occurring under the conditions of a radiant heat supply. Gel fuels, unlike combustible liquids, are characterized by a longer induction period, but a multicomponent structure of fuel caused microexplosions that enhance the combustion process.

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A New Pyrolysis of Metal Hydroxide-Mixed Waste Biomass with Effective Chlorine Removal and Efficient Heat Recovery

Cited by 13 publications

References 16 publications

Catalytic Dechlorination and Charring Reaction of Polyvinyl Chloride by CuAl Layered Double Hydroxide

Catalytic Dechlorination and Charring Reaction of Polyvinyl Chloride by CuAl Layered Double Hydroxide

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

Oil-Filled Cryogels: New Approach for Storage and Utilization of Liquid Combustible Wastes

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