Kinetic Study of Cotton Stalk and Rice Husk Samples under an Inert and Oxy Combustion Atmospheres

Mailto, Ghulamullah; Mahar, Rasool Bux; Unar, Imran Nazir; Brohi, Khan Muhammad

doi:10.22581/muet1982.1802.09

Cited by 11 publications

(4 citation statements)

References 32 publications

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“…The appearance of the shoulder in the DTG curve may be due to the degradation of the hemicellulose and lignin in the CS sample and attributed to the decomposition of tetra-bromo-bisphenol-A in the PCB sample (Chen et al, 2018). Whereas, a continuous slow degradation in CS and mixture may correspond to the slow decomposition of lignin (Mailto et al, 2018;Dhaundiyal et al, 2018). For the PCB sample, this slow degradation is due to the rupture of ether bonds in brominated resin into bisphenol A, propyl alcohol, tetra-bromo-bisphenol-A, and small phenolic molecules (Islam et al, 2018).…”

Section: Tga Resultsmentioning

confidence: 99%

Chemical and Process Engineering

2022

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With advancing technology, printed circuit board (PCB), one of the most important components of ewaste, has become a source of pollution due to an ineffective waste management system. This problem can be solved by converting PCB waste into a valuable product which will emerge to maximize the renewable energy supplies. In this aspect, co-pyrolysis is advantageous in both simple and successful in producing high-quality pyrolysis oil. In this paper, cotton stalk (CS) as biomass was used and pyrolysis of PCB, CS, and a mixture of both in 1:1 have been carried out. CS has a good combustibility at 500 • C which was chosen for the pyrolysis reaction in a fixed bed reactor for slow pyrolysis. The pyrolytic oil was analysed by GC-MS and FTIR. The results indicate that there is an increase in oil yield from 19.6% to 27.5% by weight and phenol and phenolic compounds in oil of co-pyrolysis from 60.94% to 76.82% compared to literature available. There is an increase in bromine solidification in char by 25% with a mixture of CS and PCB compared to CS and PCB individually which is much higher than literature data. To the best of the authors' knowledge, co-pyrolysis of PCB:CS has been attempted first time and debromination of oil was found excellent in the present work.

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Section: Tga Resultsmentioning

confidence: 99%

Chemical and Process Engineering

2022

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“…32,33 The results shown are in line with thermal decomposition profiles of typical lignocellulosic materials reported in the literature. [21][22][23]27 TGA results for the three slowest heating rates (0.5, 1, and 2°C min −1 ) were then used in the AKTS software to compute the kinetic parameters using three methods, ASTM-E698, FWO, and Friedman's differential isoconversional model. Moreover, conversion predictions were provided under isothermal conditions.…”

Section: Kinetic Modeling Resultsmentioning

confidence: 99%

“…Several attempts to investigate the kinetic parameters of cotton stalks have been carried out. Mailto et al 21 mainly used a linear model-fitting method using the Arrhenius equation and calculated an activation energy of 72.31 kJ•mol −1 based on a single heating rate of 10°C min −1 . El-Sayed and Mostafa also used model-fitting methods using both, direct Arrhenius plotting and the Coats and Redfern model, calculating activation energies of 98.5-102 kJ•mol −1 and 72.5-127.8 kJ•mol −1 , respectively.…”

Section: Introductionmentioning

confidence: 99%

Characterization and kinetic modeling for pyrolytic conversion of cotton stalks

Fawzy

Osman

Farrell

et al. 2021

Energy Science & Engineering

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“…he conversion of biomass into biofuel is considered as a sustainable way to manage with the fossil fuels exhaustion and to meet environmental wellbeing [1]. Biofuels production from biomass sources will help in mitigating the greenhouse gas emissions particularly carbon dioxide that results in increasing level of CO2 in the Jamshoro, Pakistan, Email: dean.foapand@admin.muet.edu.pk environment and subsequently causing a rise in global temperature [1][2]. The possible ways to reduce CO2 emissions have remained a burning issue for the last few decades.…”

Section: Introductionmentioning

confidence: 99%

Simulation of Cotton Stalks for Syngas Generation Using CO2 and Air as Gasifying Agents

Maitlo

Mahar

Brohi

2020

Mehran Univ. res. j. eng. technol.

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Gasification of coal and biomass using CO2 and air mixture as a carrier gas offers an encouraging way to eliminate the shortage of energy and reduce carbon dioxide emissions. In the present study, the EulerianLagrangian approach was applied to understand the thermochemical conversion behavior of feedstock in entrained flow gasifier. Commercial CFD (Computational Fluid Dynamics) code ANSYS FLUENT®14 was used for the simulation purpose. It was observed that with variation in the CO2 in the air and the CO2 to cotton stalk ratio had a meaningful effect on gasification performance. The different ratios of air and CO2 in varying percentages such as 20% CO2, 30% CO2, 40% CO2, 50% CO2, 60% CO2, 70% CO2 and remaining percentages of air were introduced in entrained flow gasifier. With the increase in CO2 to cotton stalk ratio, the concentration of H2 and CO2 decreased whereas as the concentration of CO improved. It is revealed that mole fraction of CO and CH4 attained maximum when CO2% in the air was 50% and H2 mole fraction was observed maximum at a CO2% in the air was 30%. At 50% CO2 mixture in air, the maximum lower heating value and cold gas efficiency were observed. Therefore, the optimum situation might be 50% percentage CO2 in the gasifying agent for this entrained flow gasifier. Hence an increase in CO and H2, the cold gas efficiency and lower heating value reached the maximum. However, this study provides an appropriate route for energy production using cotton stalks as raw material and will help in designing and operation of the entrained flow reactor. The simulations indicate the thermodynamic limits of gasification and allow for the formulation of the general principles ruling this process. Moreover, no literature is available for the parametric investigations of Pakistani biomass gasification using entrained-flow gasifier. So this is a novel work for Pakistan and will be treated as foundation work for biomass gasification in the country.

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Kinetic Study of Cotton Stalk and Rice Husk Samples under an Inert and Oxy Combustion Atmospheres

Abstract: ABSTRACT

Cited by 11 publications

References 32 publications

Chemical and Process Engineering

Chemical and Process Engineering

Characterization and kinetic modeling for pyrolytic conversion of cotton stalks

Simulation of Cotton Stalks for Syngas Generation Using CO2 and Air as Gasifying Agents

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