Conversion of peach endocarp and polyethylene residue by the co-pyrolysis process

Valadão, Lidiane Schmalfuss; Duarte, Caroline; Santos, Diego Gil de los; Filho, Pedro José Sanches

doi:10.1007/s11356-021-16379-9

Cited by 4 publications

(7 citation statements)

References 56 publications

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“…ML T and RL T for 100PS were 78.81 and 21.8 wt% which is almost consistent with the literature. 8 The ML T and RL T for C-PS blends were in the range of 53.75-68.87 and 31.13-46.25 wt%, respectively. The ML T for C-PS blends increased by raising the 100PS ratio in the blends, while RL T for blends decreased.…”

Section: Feedstockmentioning

confidence: 91%

“…The first peak represents the decomposition of hemicellulose components (146-338°C), while the second peak in Section II represents the decomposition of cellulose components (338-409.3°C). 8 The primary thermal decomposition characteristics of Sections II and III are given in Table 2. For 100PS and 100C, the ignition temperature (T i ) was 146°C and 300.4°C, respectively.…”

Section: Feedstockmentioning

confidence: 99%

“…They account for 10% of the total amount produced by mass, becoming an environmental issue for companies due to a lack of a suitable end destination. 8 Coal as a fossil fuel is known to be one of the principal energy sources for energy production in many industrialized and developing countries of the world due to escalating energy demands. 9,10 However, coal usage has implications such as air pollution, which causes various health and environmental challenges, and the rapid global energy consumption of coal, which contributes to its depletion.…”

Section: Introductionmentioning

confidence: 99%

“…The PS is produced as agroindustrial waste during the canned peach production process. They account for 10% of the total amount produced by mass, becoming an environmental issue for companies due to a lack of a suitable end destination 8 …”

Section: Introductionmentioning

confidence: 99%

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Exploring copyrolysis characteristics and thermokinetics of peach stone and bituminous coal blends

Khoja,

Gohar,

Khan

et al. 2023

Energy Science & Engineering

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Copyrolysis, being an active area of research due to its synergistic impact in utilizing diverse fuel resources, including waste materials, like, peach stone (PS), has been the focal point for this study. PS, produced in vast quantities annually and typically intended for landscaping or insulation purposes, is being studied in combination with low‐grade bituminous coal for energy utilization focusing on thermokinetics and synergistic aspects. Coal‐peach stone (C‐PS) blends were formulated at different ratios and subjected to comprehensive characterization techniques, including ultimate analysis (CHN‐S), gross calorific value (GCV), Fourier transform infrared spectroscopy, and thermogravimetric analyzer (TGA). The ultimate analysis revealed an enhancement in carbon and hydrogen content from 45.38% to 68.08% and from 3.89% to 6.96%, respectively. Additionally, a reduction in sulfur and nitrogen content from 0.54% to 0.11% and from 1.16% to 0.42%, respectively, was observed with an increase in the ratio of PS in the C‐PS blends. The GCV of C‐PS blends ranged from 20.75 to 26.01 MJ kg−1. The pyrolysis conditions simulated in TGA are pivotal for evaluating thermokinetics and synergistic effects. The 60C:40PS blend shows a positive synergy index (SI) value of 0.0203% concerning total mass loss (MLT) indicating a favorable condition for bio‐oil generation. Coats–Redfern model‐fitting method reveals that the activation energy (Ea) of C‐PS blends increases in Section II with the addition of PS, and conversely, it decreases in Section III. The Ea for 100PS and 100C was 106.76 and 45.85 kJ mol−1 through (D3) and (F1), respectively, which was improved through the optimal blend 60C:40PS with an Ea of 94.56 and 27.58 kJ mol−1 through (D3) and (F2), respectively. The values obtained from linear regression prove that the kinetic models are effective while the thermodynamic analysis indicates that the pyrolytic behavior of C‐PS blends is characterized as endothermic, nonspontaneous, and capable of achieving thermodynamic equilibrium more rapidly.

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Section: Feedstockmentioning

confidence: 91%

Section: Feedstockmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Exploring copyrolysis characteristics and thermokinetics of peach stone and bituminous coal blends

Khoja,

Gohar,

Khan

et al. 2023

Energy Science & Engineering

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“…The RHAP sample was obtained in the slow pyrolysis process, where it is observed the highest biochar formation (RHAP). Thus, the chemical bonds of the lignocellulosic material are broken slowly without signi cantly affecting the polymeric structure, favoring rearrangement reactions on the solid surface, secondary reactions associated with a longer residence time in the reactor, which bene ts the formation of a carbon rich solid residue (Valadão, et al 2021). The results described in Where: SD: standard deviation.…”

Section: Immediate Analysismentioning

confidence: 99%

Silica extraction from rice hull ash through the sol–gel process under ultrasound

Fusinato

Amaral

Irigon

et al. 2022

Environ Sci Pollut Res

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Rice is among the main foods produced in the world and is part of the daily diet of most families. The main waste from rice processing is rice husk (RH), which has been used as biomass for energy generation through combustion. In this process, rice husk ash (RHA) is generated as a residue, and its silica (SiO 2 ) content varies from 85-98%. The present work describes the study of the extraction of silica from RHA by the ultrasoundassisted sol-gel method. An experimental design based on the Response Surface Methodology (RSM) with the symmetrical, second-order Rotational Central Composite Design (RCCD) was applied to determine the best extraction conditions considering extraction time and molar ratio (n) as variables = n NaOH / n Silica ). These optimal conditions were then applied to three ash samples, two obtained by the combustion process in a boiler furnace, with a mobile grate system (RHAC 1 and RHAC 2 ), and one obtained by the pyrolysis process (RHAP) carried out in a xed bed reactor. Results showed that a molar ratio of 4.4, and an extraction time of 107 minutes were the best extraction conditions, leading to a yield of 73.3% for RHAP, 43.9% for RHAC 1 , and 31.1% for RHAC 2 . It was found that the extraction yield and textural properties of the silica obtained depend on the characteristics of the ash used. The silica extracted from RHAC 1 presented a surface area of 465 m 2 .g − 1 , mesopores of 4.69 nm, purity greater than 95%, and an ultra-ne granulometric distribution, reaching nanoparticle dimensions, characteristics comparable to commercially available silicas.

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Physicochemical properties, pyrolysis kinetics, thermodynamic parameters of activation, and evolved volatiles of mango seed waste as a bioenergy feedstock: A potential exploration

et al. 2023

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Conversion of peach endocarp and polyethylene residue by the co-pyrolysis process

Cited by 4 publications

References 56 publications

Exploring copyrolysis characteristics and thermokinetics of peach stone and bituminous coal blends

Exploring copyrolysis characteristics and thermokinetics of peach stone and bituminous coal blends

Silica extraction from rice hull ash through the sol–gel process under ultrasound

Physicochemical properties, pyrolysis kinetics, thermodynamic parameters of activation, and evolved volatiles of mango seed waste as a bioenergy feedstock: A potential exploration

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