Pyrolysis and combustion kinetics of date palm biomass using thermogravimetric analysis

Sait, Hani Hussain; Hussain, Ahmad; Salema, Arshad Adam; Ani, Farid Nasir

doi:10.1016/j.biortech.2012.04.081

Cited by 339 publications

(145 citation statements)

References 31 publications

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“…The activation energy of ARTOK measured here suggests that the reactions are chemical reaction controlled compared with AROK. However, the activation energy of raw olive kernel under inert conditions (pyrolysis) has been investigated in previous work and found equal to 60.8 kJ/mol; less than the activation energy of gasification of AROK [14], which agreed well with results of others [70,71], who found the activation energy in air was higher than in a nitrogen atmosphere.…”

Section: Kinetic Parameterssupporting

confidence: 86%

Kinetics and Performance of Raw and Torrefied Biomass in a Continuous Bubbling Fluidized Bed Gasifier

Al-Farraji

Marsh

Steer

et al. 2017

Waste Biomass Valor

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This paper is an experimental study of the kinetics of gasification of olive kernel by using a thermogravimetric fluidized bed reactor technique. Gasification of 'as received' and torrefied olive kernels were investigated in a lab-scale bubbling fluidized bed gasifier, operating at up to 3.2 kg/h. The effect of bed temperature between 550 and 750 °C in 50 °C increments on the gasification product gas at mass-based equivalence ratios of 0.15 and 0.2 was studied. To explore the potential of torrefied biomass, the gasification results were compared to that of the 'as received' biomass. The product gas from torrefied biomass produced higher H 2 , CO and CH 4 concentrations at identical oxidant flow rates in addition to higher cold gas efficiency and higher product gas heating value. The influence of equivalence ratio in gasification was also investigated at reactor temperatures of 750 °C and five equivalence ratios (0.15, 0.2, 0.25, 0.3, and 0.35). The results revealed that the torrefied biomass has the highest HHV at an equivalence ratio of 0.2 with a value of 6.09 MJ/Nm 3 , while 'as received' biomass 4.72 MJ/Nm 3 . Kinetic experiments under isothermal conditions were performed for the gasification of the materials in continuous mode. A mass balance model was successfully used to provide the capability of separately determining the rate constant of the reactions taking place. The kinetic parameters were calculated by a first order reaction model giving activation energies for 'as received' olive kernels of 84 kJ/mol and for torrefied olive kernels of 106 kJ/mol.

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Section: Kinetic Parameterssupporting

confidence: 86%

Kinetics and Performance of Raw and Torrefied Biomass in a Continuous Bubbling Fluidized Bed Gasifier

Al-Farraji

Marsh

Steer

et al. 2017

Waste Biomass Valor

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“…The kinetic parameters of combustion provide useful information for the design and optimization of thermo-chemical systems. Currently, there are many methods for calculating kinetic parameters (Sait et al 2012;Yang et al 2016). The reaction rate of the samples obeyed the fundamental Arrhenius equation (Eq.…”

Section: Determination Of the Kinetic Parameters Of Corn Straw And Hymentioning

confidence: 99%

Fuel Properties and Combustion Kinetics of Hydrochar Prepared by Hydrothermal Carbonization of Corn Straw

Xiao¹,

Fan²,

Shi³

et al. 2016

BioResources

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The potential of using hydrothermal carbonization (HTC) on corn straw (CS) was studied for the production of solid fuel. The effects of hydrothermal conditioning on the mass yield, energy yield, higher heating value (HHV), H/C and O/C atomic ratios, the morphology, and equilibrium moisture content (EMC) of hydrochars were examined by varying the reaction temperature (170 °C, 200 °C, 230 °C, and 260 °C) and the residence time (15 min and 30 min). The results demonstrated that the solid fuel properties of hydrochar produced at 230 °C for 30 min had an appropriate HHV of 20.51 MJ/kg, a mass yield of 64.80%, and an energy yield of 77.41%. The physical structure changed because of hydrothermal carbonization and the hydrophobicity of hydrochar increased in comparison to raw corn straw after hydrothermal carbonization. The combustion characteristics and kinetic parameters of raw corn straw and hydrochar were calculated based on the thermogravimetric curves according to Arrhenius equation. The activation energies of hydrochars were larger than that of raw corn straw. The comprehensive combustibility index (S) of raw corn straw was greater than that of hydrochar when the reaction temperature and residence time were 230 °C and 30 min, respectively.

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“…TGA and DTA are very useful tools for assessing the thermal characteristics of biomass and its components under a controlled environment and is often associated with kinetic modeling (Magdziarz and Wilk, 2013;Branca and Di Blasi, 2015). Numerous papers have concerned with the kinetics of combustion of lignocellulosic biomass, in terms of rice husk (Saldarriaga et al, 2015), corn straw (Fang et al, 2013), miscanthus (Jayaraman and Gökalp, 2015) and date palm wastes (Sait et al, 2012). Despite the literatures regarding lignocellulosic biomass is abundant, only a limited number of studies are concerned about the combustion of microalgae.…”

Section: Introductionmentioning

confidence: 99%

Combustion behavior and kinetics of low-lipid microalgae via thermogravimetric analysis

Gai

Liu

Han

et al. 2015

Bioresource Technology

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h i g h l i g h t sCombustion of low-lipid microalgae C. pyrenoidosa and S. platensis were studied. Chemical functional groups present in two microalgae were investigated via FTIR. Apparent activation energies for combustion of the two microalgae were calculated. C. pyrenoidosa has a higher reactivity compared to S. platensis during combustion. a r t i c l e i n f o t r a c tThermogravimetric analysis and differential thermal analysis were employed to investigate combustion characteristics of two low-lipid microalgae, Chlorella pyrenoidosa (CP) and Spirulina platensis (SP) and isoconversional Starink approach was used to calculate the kinetic parameters in the present study. The results showed that three stages of mass loss, including dehydration, devolatilization and char oxidation, were observed during combustion of both of two low-lipid microalgae. The whole weight loss of combustion of two microalgae was both shifted to higher temperature zones with increased heating rates from 10 to 40 K/min. In the 0.1-0.9 conversion range, the apparent activation energy of CP increased first from 51.96 to 79.53 kJ/mol, then decreased to 55.59 kJ/mol. Finally, it slightly increased to 67.27 kJ/mol. In the case of SP, the apparent activation energy gradually increased from 68.51 to 91.06 kJ/mol.

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Pyrolysis and combustion kinetics of date palm biomass using thermogravimetric analysis

Cited by 339 publications

References 31 publications

Kinetics and Performance of Raw and Torrefied Biomass in a Continuous Bubbling Fluidized Bed Gasifier

Kinetics and Performance of Raw and Torrefied Biomass in a Continuous Bubbling Fluidized Bed Gasifier

Fuel Properties and Combustion Kinetics of Hydrochar Prepared by Hydrothermal Carbonization of Corn Straw

Combustion behavior and kinetics of low-lipid microalgae via thermogravimetric analysis

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