Processing thermogravimetric analysis data for isoconversional kinetic analysis of lignocellulosic biomass pyrolysis: Case study of corn stalk

Abstract

Modelling of lignocellulosic biomass pyrolysis processes can be used to determine their key operating and design parameters. This requires significant amount of information about pyrolysis kinetic parameters, in particular the activation energy. Thermogravimetric analysis (TGA) is the most commonly used tool to obtain experimental kinetic data, and isoconversional kinetic analysis is the most effective way for processing TGA data to calculate effective activation energies for lignocellulosic biomass pyrolysis. This paper reviews the overall procedure of processing TGA data for isoconversional kinetic analysis of lignocellulosic biomass pyrolysis by using the Friedman isoconversional method. This includes the removal of "error" data points and dehydration stage from original TGA data, transformation of TGA data to conversion data, differentiation of conversion data and smoothing of derivative conversion data, Copyright: Elsevier 2017, Licensed under CC BY NC ND 2 interpolation of conversion and derivative conversion data, isoconversional calculations, and reconstruction of kinetic process. The detailed isoconversional kinetic analysis of TGA data obtained from the pyrolysis of corn stalk at five heating rates were presented. The results have shown that the effective activation energies of corn stalk pyrolysis vary from 148 to 473 kJ mol-1 when the conversion ranges from 0.05 to 0.85.

Measuring biomass fast pyrolysis kinetics: State of the art

“…TGAs are widely applied in kinetic studies because of their ability to measure sample weight loss and temperature measurement with respect to reaction time (Bach & Chen, 2017;Cai et al, 2018;Murillo, Biernacki, Northrup, & Mohammad, 2017;Wang et al, 2016). Thermogravimetric data and differential thermogravimetric data (DTG) facilitate identification of various stages of biomass pyrolysis and temperature ranges for the decomposition of biomass components, respectively (Dollimore, Evans, Lee, & Wilburn, 1992).…”

“…Through TGA studies the decomposition of cellulose, hemicellulose, and lignin was found to occur in reasonably distinct temperature ranges, 300-400, 200-380 and above 400 C, respectively (Yang, Yan, Chen, Lee, & Zheng, 2007). This topic has been extensively reviewed by Bach and Chen (2017), Cai et al (2018), Murillo et al (2017), and Wang et al (2016). For over several decades, TGA-based studies are being performed to gather global kinetics of biomass and its components but no intrinsic kinetics can be elucidated.…”

“…Cellulose thermal decomposition into volatile products and char is speculated to follow a series of reaction pathways falling under three categories. (a) concerted reactions which involve one step transformation of the precursor molecule without any intermediate species; (b) heterolytic cleavage of glycosidic bonds in molten phase that result in ionic intermediate species, which are similar to those corresponding to acid hydrolysis; (3) homolytic cleavage generating intermediate free-radicals in gas phase (Agarwal et al, 2012;Cai et al, 2018;Kawamoto et al, 2003;Mayes et al, 2014;Mayes & Broadbelt, 2012;Mettler, Mushrif, et al, 2012;Miller & Bellan, 2010;Norinaga et al, 2013;Patwardhan et al, 2010;Patwardhan, Dalluge, et al, 2011;Ronsse et al, 2012;Shen et al, 2011;Shen & Gu, 2009;Zhang et al, 2014;Zhang, Li, et al, 2011). The method of bond cleavage is highly dependent on the operating reaction temperatures and pressures.…”

Kinetic Parameters Study for the Slow Pyrolysis of Coffee Residues Based on Thermogravimetric Analysis

“…Lignocellulosic biomass is a resource for renewable electricity, thermal energy, biofuels, and chemicals. 1 According to the International Coffee Organization, coffee is widely produced worldwide, and it is considered as the second largest traded commodity in the world. Coffee plants are cultivated in 98% of the world countries.…”

“…Modeling of lignocellulosic biomass pyrolysis processes can be used to determine their key operating and design parameters. 1 To estimate the kinetic parameters of pyrolysis process, thermogravimetric analyses can be used. This technique enables the description and interpretation of the phenomena of biomass decomposition.…”