TG-FTIR analysis of switchgrass pyrolysis

Lee, Seong Beom; Fasina, Oladiran

doi:10.1016/j.jaap.2009.04.002

Cited by 57 publications

(29 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, the pyrolysis behaviors of moso bamboo, especially the volatile release profiles at different temperature, have not been fully investigated. TG-FTIR is a useful technology for obtaining mass loss with time and evaluating the functional groups of the volatile matter produced by pyrolysis [12,13]. Therefore, the present research first determines the effects of temperature on bamboo pyrolysis behavior using TG-FTIR.…”

Section: Introductionmentioning

confidence: 99%

Bamboo pyrolysis using TG–FTIR and a lab-scale reactor: Analysis of pyrolysis behavior, product properties, and carbon and energy yields

Chen

Liu

Zhang

et al. 2015

Fuel

166

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Bamboo pyrolysis using TG–FTIR and a lab-scale reactor: Analysis of pyrolysis behavior, product properties, and carbon and energy yields

Chen

Liu

Zhang

et al. 2015

Fuel

166

View full text Add to dashboard Cite

“…Weight loss and calculated kinetic parameters are easily obtained from thermogravimetric analysis without considering complex chemical reactions taking place in thermal degradation. The evolved gases are detected in real-time, which is an important and often difficult task for many thermal applications (Ahamed and Alshehri, 2012;Gao et al, 2013;Lee and Fasina, 2009). …”

Section: Introductionmentioning

confidence: 99%

Thermogravimetric and Kinetic Analysis of Raw and Torrefied Biomass Combustion

Kopczyński¹,

Plis²,

Zuwała³

2015

Chemical and Process Engineering

View full text Add to dashboard Cite

The use of torrefied biomass as a substitute for untreated biomass may decrease some technological barriers that exist in biomass co-firing technologies e.g. low grindability, high moisture content, low energy density and hydrophilic nature of raw biomass. In this study the TG-MS-FTIR analysis and kinetic analysis of willow (Salix viminalis L.) and samples torrefied at 200, 220, 240, 260, 280 and 300 o C (TSWE 200, 220, 240, 260, 280 and 300), were performed. The TG-DTG curves show that in the case of willow and torrefied samples TSWE 200, 220, 240 and 260 there are pyrolysis and combustion stages, while in the case of TSWE 280 and 300 samples the peak associated with the pyrolysis process is negligible, in contrast to the peak associated with the combustion process. Analysis of the TG-MS results shows m/z signals of 18, 28, 29 and 44, which probably represent H 2 O, CO and CO 2 . The gaseous products were generated in two distinct ranges of temperature. H 2 O, CO and CO 2 were produced in the 500 K to 650 K range with maximum yields at approximately 600 K. In the second range of temperature, 650 K to 800 K, only CO 2 was produced with maximum yields at approximately 710 K as a main product of combustion process. Analysis of the FTIR shows that the main gaseous products of the combustion process were H 2 O, CO 2 , CO and some organics including bonds: C=O (acids, aldehydes and ketones), C=C (alkenes, aromatics), C-O-C (ethers) and C-OH. Lignin mainly contributes hydrocarbons (3000-2800 cm ). Hydrocarbons, aldehydes, ketones and various acids were also generated from hemicellulose (1790-1650 cm −1). In the kinetic analysis, the two-steps first order model (F1F1) was assumed. Activation energy (E a ) values for the first stage (pyrolysis) increased with increasing torrefaction temperature from 93 to 133 kJ/mol, while for the second stage (combustion) it decreased from 146 to 109 kJ/mol for raw willow, as well as torrefied willow at the temperature range of 200-260°C. In the case of samples torrefied at 280 and 300°C, the E a values of the first and second stage were comparable to E a of untreated willow and torrefied at 200°C. It was also found that samples torrefied at a higher temperature, had a higher ignition point and also a shorter burning time.

show abstract

“…The thermogravimetry coupled with Fourier-transformed infrared spectroscopy (TG-FTIR) technique has been proved to be a valuable and simple tool, not only to analyze the gas phase during the thermolysis of lignocellulosic compounds [35][36][37], but also to clarify different steps during fiber…”

Section: Introductionmentioning

confidence: 99%

Comparison of thermal behavior of natural and hot-washed sisal fibers based on their main components: Cellulose, xylan and lignin. TG-FTIR analysis of volatile products

et al. 2014

View full text Add to dashboard Cite

Abstract:This paper presents in a comprehensive way the thermal behavior of natural and hot-.washed sisal fibers, based on the fundamental components of lignocellulosic materials: cellulose, xylan and lignin. The research highlights the influence exerted on the thermal stability of sisal fibers by other constituents such as non-cellulosic polysaccharides (NCP) and mineral matter. Thermal changes were investigated by thermal X-ray diffraction (TXRD), analyzing the crystallinity index (%Ic) of cellulosic samples, and by simultaneous thermogravimetric and differential thermal analysis coupled with Fourier-transformed infrared spectrometry (TG/DTA-FTIR), which allowed to examine the evolution of the main volatile compounds evolved during the degradation under inert and oxidizing atmospheres. The work demonstrates the potential of this technique to elucidate different steps during the thermal decomposition of sisal, providing extensible results to other lignocellulosic fibers, through the analysis of the evolution of CO 2 , CO, H 2 O, CH 4 , acetic acid, formic acid, methanol, formaldehyde and 2-butanone, and comparing it with the volatile products from pyrolysis of the biomass components. The hydroxyacetaldehyde detected during pyrolysis of sisal is indicative of an alternative route to that of levoglucosan, generated during cellulose pyrolysis.Hot-washing at 75 ºC mostly extracts non-cellulosic components of low decomposition temperature, and reduces the range of temperature in which sisal decomposition occurs, causing a retard in the pyrolysis stage and increasing Tb NCP and Tb CEL , temperatures at the maximum mass loss rate of non-cellulosic polysaccharides and cellulose decompositions, respectively. However, enriching sisal fibers in cellulose produces a decrease of Tb CEL under an oxidizing atmosphere, and furthermore, a delay of the combustion process, displacing Tb COM to higher temperatures.The results and findings of the paper would help further understanding of thermal processes where agave fibers are involved, as the decomposition of their composites.

show abstract

TG-FTIR analysis of switchgrass pyrolysis

Cited by 57 publications

References 18 publications

Bamboo pyrolysis using TG–FTIR and a lab-scale reactor: Analysis of pyrolysis behavior, product properties, and carbon and energy yields

Bamboo pyrolysis using TG–FTIR and a lab-scale reactor: Analysis of pyrolysis behavior, product properties, and carbon and energy yields

Thermogravimetric and Kinetic Analysis of Raw and Torrefied Biomass Combustion

Comparison of thermal behavior of natural and hot-washed sisal fibers based on their main components: Cellulose, xylan and lignin. TG-FTIR analysis of volatile products

Contact Info

Product

Resources

About