Characterizing and optimizing (co-)pyrolysis as a function of different feedstocks, atmospheres, blend ratios, and heating rates

Liu, Jingyong; Huang, Lusheng; Xie, Wei; Kuo, Jia‐Hong; Büyükada, Musa; Evrendilek, Fatih

doi:10.1016/j.biortech.2019.01.003

Cited by 26 publications

(3 citation statements)

References 35 publications

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“…The negative ∆H for reactions ( 9) and ( 11) at 120-200 • C indicated that the reactions were exothermic, while the rest of the ∆H values were positive, which indicated that the reactions were endothermic [22]. The positive ∆S values suggested a degree of disorder in the system and ∆S increased with temperature; thus, the degree of disorder in the reaction system increased [23]. Additionally, all the theoretical possibilities and the feasibility of these reactions were illustrated by thermodynamic calculations, but the actual products could not be determined by thermodynamic data, requiring further investigation.…”

Section: Thermodynamic Analysismentioning

confidence: 99%

The Influence of Hydrothermal Temperature on Alumina Hydrate and Ammonioalunite Synthesis by Reaction Crystallization

Wang

et al. 2023

Crystals

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With the rapid development of the alumina industry and the shortage of bauxite, high-alumina coal fly ash (HACFA) has attracted more and more attention as a potential alternative alumina resource. In order to extract alumina from HACFA with newly developed technology, the investigation of the crucial step, the reaction between NH4Al(SO4)2·12H2O and NH3·H2O, is necessary and valuable. Thermodynamic analyses have shown that four kinds of alumina hydrate (boehmite, diaspore, gibbsite, and bayerite) might be formed at 120–200 °C, and ammonioalunite might be formed at temperatures over 180 °C. A hydrothermal reaction crystallization method was applied to this reaction. The experimental results showed that boehmite (AlOOH) could be formed at 150 °C and 200 °C after 12 h and NH4Al3(SO4)2(OH)6, an unstable intermediate, is formed during the initial stage and transformed into boehmite, eventually. The higher temperature (200 °C) was more energetically favorable for the formation of NH4Al3(SO4)2(OH)6, and the crystallinity of the products was better. More importantly, the sheet-like structure of boehmite (AlOOH) could be formed at 150 °C after 24 h of reaction time. The SEM results proved that the sheet-like structures evolutionary process of boehmite.

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Section: Thermodynamic Analysismentioning

confidence: 99%

The Influence of Hydrothermal Temperature on Alumina Hydrate and Ammonioalunite Synthesis by Reaction Crystallization

Wang

et al. 2023

Crystals

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“…The interactions of co-pyrolysis between the different fuels often play a decisive role in practical applications. The deviations between the theoretical TG and the test values of RAB-RH mixtures were selected to evaluate the interactions [39]. Assuming that there were no interactions during the co-pyrolysis of RAB and RH, theoretical values were calculated using Equation (3).…”

Section: Interaction Analysismentioning

confidence: 99%

Reutilization of Reclaimed Asphalt Binder via Co-Pyrolysis with Rice Husk: Thermal Degradation Behaviors and Kinetic Analysis

Zhao,

Mi,

et al. 2023

Materials

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Realizing the utilization of reclaimed asphalt binder (RAB) and rice husk (RH) to reduce environmental pollution and expand the reutilization technique of reclaimed asphalt pavement (RAP), co-pyrolysis of RAB with RH has great potential. In this study, the co-pyrolysis behaviors, gaseous products, and kinetics were evaluated using thermogravimetric analysis and Fourier transform infrared spectroscopy (TG-FTIR). The results showed that incorporating RH into RAB improved its pyrolysis characteristics. The interactions between RAB and RH showed initial inhibition followed by subsequent promotion. The primary gaseous products formed during co-pyrolysis were aliphatic hydrocarbons, water, and carbon dioxide, along with smaller amounts of aldehydes and alcohols originating from RH pyrolysis. All average activation energy values for the blends, determined through iso-conversional methods, decreased with RH addition. The combined kinetic analysis revealed two distinct mechanisms: (1) at the lower conversion range, the pyrolysis of the blend followed a random nucleation and three-dimensional growth mechanism, while (2) at the higher conversion range, the control mechanism transitioned into three-dimensional diffusion.

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“…However, use of solid wastes as bioenergy feedstock could reduce waste disposal problems and alleviate pressure on the environment by providing clean energy. 5 In particular, generation of energy from municipal solid waste (MSW) and livestock manure eliminates the most common problems, such as reduction in large volumes to be disposed of, 6 unwanted transfer of pathogens into the ecosystem, and eutrophication caused by the leaching of nutrients into nearby water bodies, etc. 7 To date, anaerobic digestion (AD) has been widely acknowledged as a means to add value and stabilize solid wastes.…”

Section: Introductionmentioning

confidence: 99%

Solid Waste as a Renewable Source of Energy: A Comparative Study on Thermal and Kinetic Behavior of Three Organic Solid Wastes

et al. 2019

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Pyrolytic characteristics of three different organic solid wastes, municipal solid waste (MSW), digested MSW (DMSW), and digested swine manure (SWD), were investigated at heating rates of 10, 15, and 20 °C min–1 in a thermogravimetric analyzer coupled with mass spectrometer. Three stages of devolatilization, dehydration (0–200 °C), decomposition of major structural components (200–500 °C), and decomposition of solid residue (500–800 °C), appeared during the pyrolysis of all the samples. The major devolatilization stage (stage II) is characterized with three peaks at 319, 379, and 438 °C for MSW, two peaks at 339 and 430 for DMSW, and one peak with a shoulder on the right at 332 and 444 °C for SWD, respectively. The evolved gas species were quantified by using a semiquantitative approach, and H2, CO and CO2 were noticed to be predominant gas species in the above-mentioned range. While the evolution of H2 is mostly temperature dependent, the evolution of CO and CO2 occurred all through the run. Isoconversional methods along with compensation effect and master plots were used to determine the kinetic triplet for the pyrolysis process. The mean activation energies were 172.02–172.3, 202.21–202.55, and 213.84–215.22 kJ mol–1, while the pre-exponential factors were 1.81 × 1010, 1.04 × 1018, and 2.26 × 1019 for MSW, DMSW, and SWD, respectively.

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Characterizing and optimizing (co-)pyrolysis as a function of different feedstocks, atmospheres, blend ratios, and heating rates

Cited by 26 publications

References 35 publications

The Influence of Hydrothermal Temperature on Alumina Hydrate and Ammonioalunite Synthesis by Reaction Crystallization

The Influence of Hydrothermal Temperature on Alumina Hydrate and Ammonioalunite Synthesis by Reaction Crystallization

Reutilization of Reclaimed Asphalt Binder via Co-Pyrolysis with Rice Husk: Thermal Degradation Behaviors and Kinetic Analysis

Solid Waste as a Renewable Source of Energy: A Comparative Study on Thermal and Kinetic Behavior of Three Organic Solid Wastes

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