Non-isothermal pyrolytic kinetics of milk dust powder using thermogravimetric analysis

Vikraman, V. Karuppasamy; Boopathi, G.; Kumar, D. Praveen; Mythili, R.; Subramanian, P.

doi:10.1016/j.renene.2021.08.099

Cited by 12 publications

(4 citation statements)

References 53 publications

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“…To validate the present findings, authors compared their findings with existing applied biomass pyrolysis works including Delonix regia, 11 milk dust powder, 46 prutvinja seeds, 47 rice husk, 48 peanut shells, 44 and sugarcane leaves 49 ; and 11,44,46–49 summarize in Table 4. The increased value of present study was found to be fairly similar to previous documented feedstock.…”

Section: Resultsmentioning

confidence: 74%

“…This broad fluctuation in k 0 with conversion is indicative of the T. chebula's structural integrity and varied composition, as well as the numerous parallel processes that occur in the course of pyrolysis process. 46 Typically, a lower value of frequency factor (k 0 ) < 10 9 shows poor reactivity, predominance of mainly surface reactions and suggests closed complex while k 0 between 10 11 and 10 12 suggests cellulose degradation, and k 0 > 10 14 emphasizes the requirement of increased molecule collision in order to proceed with the reaction, which demands a large activation energy. 50 According to Rammohan et al 11 , the values of k 0 >10 9 suggests simple complex and values of k 0 < 10 9 suggests closed complex.…”

Section: 22mentioning

confidence: 99%

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Kinetics and thermodynamics of non‐isothermal pyrolysis of Terminalia chebula branches at different heating rates

Thejaswini,

Annapureddy,

Rammohan

et al. 2023

Int J of Chemical Kinetics

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Non‐isothermal thermogravimetric tests of Terminalia chebula (Helikha) were conducted under inert N2 gas environment for temperatures (25–900°C) at heating rates of 10, 20, 35, and 55°C min−1. Kinetic triplet approximated employing five iso‐conversional methods namely, differential Friedman method (DFM), distributed activation method (DAEM), Ozawa–Flynn–Wall (OFW), Kissinger–Akahira–Sunose (KAS), and Starink (STK). Average values of activation energy (kJ mol−1) and frequency factor (min−1) calculated by the five models were 227.11, 2.98 × 1021 for DFM; 229.21, 4.63 × 1021 for KAS; 227.11, 3.81 × 1020 for OFW; 225.54, 1.15 × 1018 for STK; and 227.33, 3.02 × 1020 for DAEM respectively over the conversion range up to 0.8. In the kinetics study, correlation coefficient (R2) of greater than 0.97 is noticed in the conversion range of α = 0.1–0.8 for all models. From thermodynamic analysis, average values of ΔH (kJ mol−1), ΔG (kJ mol−1), and ΔS (kJ mol−1 K−1) for DAEM: 221.8, 179.69, and 0.065; for DFM: 236.40, 179.37, and 0.089; for KAS: 221.8, 179.69, and 0.065; for OFW: 220.22, 179.72, and 0.063; and for STK: 222.02, 179.68, and 0.066 were estimated to assess viability and reactivity of the process. Criado's master plots revealed that the data obtained from pyrolysis of selected biomass was followed a multistep reaction pathway.

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Section: Resultsmentioning

confidence: 74%

Section: 22mentioning

confidence: 99%

Kinetics and thermodynamics of non‐isothermal pyrolysis of Terminalia chebula branches at different heating rates

Thejaswini,

Annapureddy,

Rammohan

et al. 2023

Int J of Chemical Kinetics

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“…Gibbs free energy ( ΔG *) is the component of the reduced internal energy of the system that can be converted into external work in a thermodynamic process. When ΔG * > 0, it is a non‐spontaneous reaction, and when ΔG * < 0, it is a spontaneous reaction (Vikraman et al., 2021 ). In this study, the ΔG * of soymilk during storage ranged from 79.87 to 88.90 kJ/mol, indicating non‐spontaneous reactions of soymilk during storage at different temperatures.…”

Section: Resultsmentioning

confidence: 99%

Storage stability and shelf‐life of soymilk obtained via repeated boiling and filtering: A predictive model

Fan,

Duan,

Huang

et al. 2023

Food Science & Nutrition

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This study investigated the effects of different processing methods on the quality and nutrition of soymilk, as well as the changes in storage stability (centrifugal sedimentation rate (CSR), viscosity, and particle size) and shelf‐life of soymilk at different storage temperatures (25°C, 35°C, 45°C, and 55°C). Results showed that soymilk processed via the repeated boiling‐to‐filtering method (RBFM) exhibited the highest protein content (3.89 g/100 g), carbohydrate content (1.27 g/100 g), and stability coefficient (0.950). The CSR and particle size of RBFM soymilk increased gradually during storage at different temperatures, while the viscosity and sensory score decreased. The correlation between the CSR and the sensory score of RBFM soymilk was the highest (R2 = .9868). The CSR was selected as the key indicator to predict the shelf‐life of RBFM soymilk. The average residual variation in RBFM soymilk shelf‐life based on the predictive model was 10.78%, indicating the strong accuracy of the model for predicting the shelf‐life of RBFM soymilk stored at temperatures ranging from 25–45°C. This study provides a theoretical basis and technological support for the development, transportation, and storage of soymilk and soymilk beverage products.

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“…The ratio of mixed plastics/spent FCC catalyst is shown in Table 1. The experimental samples were heated from 40 to 800°C at different heating rates (10 K/min, 20 K/min, 30 K/min, 40 K/min) ,[ 35 ] and each experiment was repeated three times.…”

Section: Methodsmentioning

confidence: 99%

Study on kinetics of spent FCC catalyst applied to the living waste plastics

Shan

Wang

Bian

et al. 2023

Polymer Engineering & Sci

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The thermochemical method is one of the most potential ways to treat waste plastics. In order to reduce the energy consumption of pyrolysis, this study selected spent fluid catalytic cracking (FCC) catalyst as a catalyst for pyrolysis of waste plastics to explore the pyrolysis process of mixed waste plastics (polypropylene (PP)/polyethylene (PE)/polystyrene (PS)). The kinetic calculations show that there was a positive synergistic effect in the co-pyrolysis of mixed plastics, which was beneficial to the reduction of activation energy. However, the participation of spent FCC catalysts can further reduce the pyrolysis temperature and activation energy of plastics, and increase the thermal degradation rate. Compared with non-catalytic pyrolysis, the pyrolysis temperature corresponding to the maximum weight loss rate during catalytic pyrolysis was about 12 K earlier, the maximum degradation rate was about 41% higher, and the average activation energy decreased by about 22 kJ/mol. In order to further improve the catalytic efficiency of spent FCC catalysts, the spent FCC catalysts were modified by ball milling or ultrasonic method and then used for plastic pyrolysis. It was found that the modification effect of ball milling method was better than that of the ultrasonic method. Through thermodynamic analysis, it was found that the endothermic reaction occurred in the process of plastic pyrolysis and could not proceed spontaneously. The formed pyrolysis products reduced the disorder of a microscopic system. Combined with the experimental results of this paper, it can provide theoretical support for the catalytic pyrolysis of spent FCC catalysts for mixed waste plastics.

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Non-isothermal pyrolytic kinetics of milk dust powder using thermogravimetric analysis

Cited by 12 publications

References 53 publications

Kinetics and thermodynamics of non‐isothermal pyrolysis of Terminalia chebula branches at different heating rates

Kinetics and thermodynamics of non‐isothermal pyrolysis of Terminalia chebula branches at different heating rates

Storage stability and shelf‐life of soymilk obtained via repeated boiling and filtering: A predictive model

Study on kinetics of spent FCC catalyst applied to the living waste plastics

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