Multi-Gaussian-DAEM-reaction model for thermal decompositions of cellulose, hemicellulose and lignin: Comparison of N2 and CO2 atmosphere

Zhang, Jinzhi; Chen, Tianju; Wu, Jianhui; Wu, Jinhu

doi:10.1016/j.biortech.2014.05.030

Cited by 106 publications

(71 citation statements)

References 34 publications

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“…However, as already noticed in literature [19], regression algorithms show a strong correlation between k0 and E0 leading to a non-uniqueness of kinetic parameters that is called compensation effect [20]. So to overcome this drawback, one choice is to fix k0 at a defined value that must be consistent with the transition-state theory, which indicates values in the range 10 11 -10 16 s −1 [18]. However, to obtain kinetic parameters comparable with the ones reported in the literature, a value of 10 13 s −1 was selected for the biomass [15] and a value of 8 × 10 12 s −1 for the Sulcis coal [21].…”

Section: Mathematical Modelmentioning

confidence: 99%

“…To circumvent such a limitation, in a previous work focused on coal pyrolysis, the authors proposed an extended model able to catch the kinetic parameters of both the steps by including a second Gaussian distribution (2-DAEM) [17]. This multi-Gaussian approach was also used by Zhang et al [18] to model biomass pyrolysis and gasification considering different distribution of activation energy for each class of reactions that share the same pre-exponential factor. In this paper, the multi-Gaussian model is applied to predict the behavior of the selected fuels and the results are compared with those obtained with the single DAEM (1-DAEM).…”

Section: Introductionmentioning

confidence: 99%

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Double Distribution Activation Energy Model as Suitable Tool in Explaining Biomass and Coal Pyrolysis Behavior

et al. 2015

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Understanding and modeling of coal and biomass pyrolysis assume particular importance being the first step occurring in both gasification and combustion processes. The complex chemical reaction network occurring in this step leads to a necessary effort in developing a suitable model framework capable of grasping the physics of the phenomenon and allowing a deeper comprehension of the sequence of events. The aim of this work is to show how the intrinsic flexibility of a model based on a double distribution of the activation energy is able to properly describe the two separate steps of primary and secondary pyrolysis, which characterize the thermochemical processing of most of the energetic materials. The model performance was tested by fitting the kinetic parameters from experimental data obtained by thermogravimetric analysis of two materials, which represent very different classes of energy source: a microalgae biomass and a sub-bituminous coal. The model reproduces with high accuracy the pyrolysis behavior of both the materials and adds important information about the relative occurring of the two pyrolysis steps.

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Section: Mathematical Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Double Distribution Activation Energy Model as Suitable Tool in Explaining Biomass and Coal Pyrolysis Behavior

et al. 2015

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“…The pyrolysis process is influenced by many factors, such as heating rate, temperature, pressure residence time, moisture, but is also influenced by the composition of biomass material (Slopiecka et al 2012). So it is important to distinguish the behavior of biomass components for a better understanding of the biomass pyrolysis process (Zhang et al 2014).…”

Section: Introductionmentioning

confidence: 99%

Effect of extractive content on the thermal stability of two wood species from Brazil

Poletto

2016

Maderas, Cienc. tecnol.

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The influence of extractive content on the thermal stability and kinetic degradation of two wood species has been investigated using chemical analysis and thermogravimetry. Two wood species were studied: Pinus taeda and Eucalyptus grandis. Thermogravimetric results showed that higher extractive contents in the wood accelerate the degradation process and promote an increase in the conversion values at lower temperatures reducing the wood thermal stability. After removing the extractives from wood the thermal stability for both wood species increased. The results also demonstrated that prior information about the wood composition can be helpful to increase the range of industrial applications of wood.

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“…304 °C. The main weight loss temperature range of phenol resin was from 300 to 800 °C, and the heat release rate peak appeared at approximately 545 °C (Zhou et al 2011;Zhang et al 2012). These results reveal that adhesive can affect the ignition temperature of MSFs when PGC and adhesives are mixed and molded.…”

Section: Computational Analysis Of Comprehensive Combusting Charactermentioning

confidence: 70%

Properties and Combustion Characteristics of Molded Solid Fuel Particles Prepared by Pyrolytic Gasification or Sawdust Carbonized Carbon

et al. 2015

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a Pyrolytic gasified charcoal (PGC) and tar are the solid and liquid products, respectively, yielded from biomass gasification technology. In this paper, PGC was molded with adhesives to prepare molded solid fuel (MSF). Tar and PGC were obtained from the pyrolytic gasification of wood chips and sawdust from pine and cedarwood. PGC was molded with phenol resin prepared by wood tar to prepare MSF (MSF-MP). Meanwhile, there were two other methods used to prepare MSF. PGC molded with common phenol resin was one method (MSF-P). PGC was molded with starch adhesive to prepare MSF-S. Wood powder carbonized carbon (WPCC) obtained from the marketplace was employed as a trial sample. The properties and combustion characteristics of MSFs and WPCC were studied. It was found that the shatter strength of these MSFs were more than 95%. MSFs had higher activation energy and comprehensive combustion index compared to WPCC. MSF-MP yielded the following data: shatter strength: 95.86%, lower heating value (LHV): 25.89 MJ•kg . The LHV and activation energy of MSF-MP were superior to those of other MSFs. Therefore, MSF-MP has a market potential for use as barbecue charcoal in restaurant or family gatherings. The preparation of MSF-MP is a prospective method for the utilization of PGC and wood tar.

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Multi-Gaussian-DAEM-reaction model for thermal decompositions of cellulose, hemicellulose and lignin: Comparison of N2 and CO2 atmosphere

Cited by 106 publications

References 34 publications

Double Distribution Activation Energy Model as Suitable Tool in Explaining Biomass and Coal Pyrolysis Behavior

Double Distribution Activation Energy Model as Suitable Tool in Explaining Biomass and Coal Pyrolysis Behavior

Effect of extractive content on the thermal stability of two wood species from Brazil

Properties and Combustion Characteristics of Molded Solid Fuel Particles Prepared by Pyrolytic Gasification or Sawdust Carbonized Carbon

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