Torrefaction of Leucaena Leucocephala under isothermal conditions using the Coats–Redfern method: kinetics and surface morphological analysis

Awang, A. N.; Mohamed, Alina Rahayu; Salleh, Noor Hasyierah Mohd; Hoo, Peng Yong; Kasim, Nur Nasulhah

doi:10.1007/s11144-019-01659-w

Cited by 16 publications

(2 citation statements)

References 44 publications

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“…It has high moisture content of 12.58 %. The range of moisture content of raw SS usually closed to 20 % as the raw material was taken at dewatering which intended to reduce the water content [6]. Therefore, it required thermal pretreatment for further process.…”

Section: Characterization Of Raw Ssmentioning

confidence: 99%

Influence of Torrefaction on Sewage Sludge

Ahmad

Mohammed

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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Sewage sludge (SS) from sewage treatment plants has been seen as a waste for decades and little attention to investigate the potential and its beneficial product. SS contain a large amount of recoverable energy; however, it has high moisture, ash, heavy metals, and organic contents. Thus, the goal of this research is to use torrefaction to produce upgraded or torrefied SS. The proximate and ultimate analysis was used to determine the physical and chemical characteristic of raw SS. Torrefaction was performed through inert atmosphere in fixed bed reactor. According to the findings, at torrefaction temperature of 300 °C, torrefaction had improved the quality of raw SS, increasing its fixed carbon content by 47.8%, and its moisture content by 61.3%. The optimum temperature for torrefaction was at 300 °C with holding time of 60 minutes. This study improved the quality of sewage sludge to be utilised in subsequent thermochemical conversion.

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Section: Characterization Of Raw Ssmentioning

confidence: 99%

Influence of Torrefaction on Sewage Sludge

Ahmad

Mohammed

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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“…In which, k(T) is the reaction rate constant. Also, E, A, and f(α) (or g(α)) are activation energy, pre-exponential factor, and reaction model (some of the reaction models are presented in Supplementary Table S1 [38,39]), which are known as kinetic triples, and are used for kinetic evaluation and analysis so that [18,[40][41][42]:…”

Section: Thermokinetic Studymentioning

confidence: 99%

The kinetics and mechanism of B2O3 formation from the chemically-synthesized HBO2 under non-isothermal conditions

Aghili

Panjepour

Meratian

2021

Reac Kinet Mech Cat

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In this investigation, a crystalline metaboric acid (HBO 2 ) powder was subjected to a dehydration process to transform it into boron oxide (B 2 O 3 ) using thermogravimetry (TG) technique in an argon atmosphere under non-isothermal conditions at different heating rates (3, 5, 10, and 15 °C min −1 ). The results of kinetic analysis revealed that the dehydration process was a complex one comprising a consecutive region (region I) followed by a parallel one (region II). Using the relevant kinetic models, the mechanisms involved in each region were analyzed by a proposed method for the complex reactions separately and find that the dehydration mechanism in the region I consisted of the kinetic models R 4 : g(α) = [1 − (1 − α) 2/3 ] (the chemical reaction at the HBO 2 /H 2 B 4 O 7 interface) and D 3 : g(α) = [1 − (1 − α) 1/3 ] 2 (the diffusion of H 2 O (g) in the H 2 B 4 O 7 layer), while that in the region II was parallel and consisted of the models D 3 (the diffusion of H 2 O (g) in the H 2 B 4 O 7 layer) and R 4 (the chemical reaction at the of H 2 B 4 O 7 /B 2 O 3 interface). Therefore, based on the kinetic results, the mechanisms of complex processes could be determined by the method.

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Polysaccharides of Natural Gums-Based Biomedical Devices for Drug Delivery Application

Nagaraja

Rao

et al. 2021

Nanotechnology in the Life Sciences

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Torrefaction of Leucaena Leucocephala under isothermal conditions using the Coats–Redfern method: kinetics and surface morphological analysis

Cited by 16 publications

References 44 publications

Influence of Torrefaction on Sewage Sludge

Influence of Torrefaction on Sewage Sludge

The kinetics and mechanism of B2O3 formation from the chemically-synthesized HBO2 under non-isothermal conditions

Polysaccharides of Natural Gums-Based Biomedical Devices for Drug Delivery Application

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