On the use of the arrhenius equation to describe cellulose and wood pyrolysis

Agarwal, Ravindra K.

doi:10.1016/0040-6031(85)85227-8

Cited by 39 publications

(9 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The results also suggested that the color changes during heat treatment at the temperatures ranging from 90 to 180°C can be explained as the same reaction mechanism, presumably thermal oxidation, which occurs in the presence of oxygen and the absence of moisture. The values of E a calculated from the color parameters were similar to the reported values obtained from the other properties of cellulose, such as the degree of polymerization and mechanical properties [14,21,24,29]. However, these reported values have wide variation and are still controversial [21].…”

Section: Resultssupporting

confidence: 71%

Kinetic analysis of color changes in cellulose during heat treatment

2011

View full text Add to dashboard Cite

This paper deals with the kinetics of the color changes of cellulose during heat treatment. The color of cellulose heated at 90-180°C was measured by a spectrophotometer and expressed by CIELAB color parameters. The values of L* decreased and those of a*, b* and DE* ab increased at all the treatment temperatures. Several kinetic models, namely, the zero-order, first-order, second-order and autocatalytic model, were applied to the changes in the color values. Furthermore, the results of kinetic analysis using the best-fit model were compared to the results obtained from conventional kinetic models. It was suggested that the kinetic analysis using the best-fit model was the better way to accurately predict color changes during heat treatment. The values of apparent activation energy calculated from the changes of L*, a*, b* and DE* ab were 125, 124, 118 and 120 kJ/mol, respectively. These values were similar to the reported values calculated from other chemical or mechanical properties.

show abstract

Section: Resultssupporting

confidence: 71%

Kinetic analysis of color changes in cellulose during heat treatment

2011

View full text Add to dashboard Cite

show abstract

“…According to the previous studies in different biomass materials, the shoulder at left hand side corresponds to the hemicellulose decomposition while the higher temperature peak in the right hand side represents the degradation of cellulose. The two distinct DTG peaks obtained agro‐industrial by‐products (OSW) and the agriculture residue (DPT) were already obtained for various biomasses such us cashew nut shells and corn straw . The first peak corresponds to the hemicellulose decomposition while the second peak represents the degradation of cellulose.…”

Section: Resultsmentioning

confidence: 95%

“…The best correlation for char oxidation step was obtained with the chemical reaction (F1). Guo and Lua also studied the pyrolysis of extracted oil palm fibers, and for the low temperature regimes, they found that the three‐dimensional diffusion mechanisms (D3) was effective. However, the reaction is based on the first‐order reaction (F1) for the high temperature regimes.…”

Section: Resultsmentioning

confidence: 99%

Devolatilization behavior and pyrolysis kinetics of potential Tunisian biomass fuels

Jeguirim

Elmay

Limousy

et al. 2014

Env Prog and Sustain Energy

View full text Add to dashboard Cite

Biomass thermochemical conversion is complex and requires a good understanding of the thermal decomposition process. This process may be identified using mass loss kinetics which are useful for the design of proper equipment used for biomass conversion. This work aims to determine devolatilization kinetic parameters characterizing four Tunisian biomass species: industrial by product (Pine Sawdust), agro‐industrial by product (Olive Solid Waste), agricultural residue (Date Palm Trunk) and seaweed (Posidonia Oceanica) using data from non‐isothermal thermogravimetry and the Coats and Redfern calculation method. Decomposition TG and DTG data were analyzed by applying 10 kinetic models including processes governed by nuclei growth, surface nucleation followed by geometric, diffusion and chemical reaction models. Obtained results show that biomass pyrolysis is represented by two successive steps: (i) devolatilization stage characterized by high weight loss rate, which is well described by diffusional, surface nucleation followed by geometric and first order chemical reaction models. (ii) char formation stage characterized by low weight loss rate, which is well described by second order and third order chemical reaction models. © 2014 American Institute of Chemical Engineers Environ Prog, 33: 1452–1458, 2014

show abstract

“…Some authors discussed the validity of Arrhenius law linearity to explain reaction rates and time-temperature effects (Brown 1982, Agrawal 1985, Hutchinson 1995, Struik 1997. However, in the case of samples free from external loads during the thermal modification and at quite low temperature, there is no doubt on the relevance of the law application.…”

Section: Kinetic Analysismentioning

confidence: 99%

Kinetic analysis of poplar wood properties by thermal modification in conventional oven

Marcon¹,

Goli²,

Matsuo-Ueda³

et al. 2018

iForest

View full text Add to dashboard Cite

The kinetics of several poplar (Populus alba L.) wood properties during thermal modification conducted in conventional oven with air recirculation were analysed and modelled in this paper. A wide range of properties was assessed, such as: equilibrium moisture content, sorption diagram, shrinkage coefficients, specific shrinkage coefficients, mass loss, modulus of elasticity, strength and colour. The tests were executed at different temperatures ranging from 90 °C to 180 °C and with different durations. The time-temperature equivalency was checked and property modifications over time analysed through master curves in order to obtain a general model connecting together properties, treatment temperature and duration. Different activation energies arising from each property evolution with treatment temperature and duration are provided showing that every modification could occur with different kinetics.

show abstract

On the use of the arrhenius equation to describe cellulose and wood pyrolysis

Cited by 39 publications

References 20 publications

Kinetic analysis of color changes in cellulose during heat treatment

Kinetic analysis of color changes in cellulose during heat treatment

Devolatilization behavior and pyrolysis kinetics of potential Tunisian biomass fuels

Kinetic analysis of poplar wood properties by thermal modification in conventional oven

Contact Info

Product

Resources

About