Analytical pyrolysis studies of corn stalk and its three main components by TG-MS and Py-GC/MS

Lv, Gaojin; Wu, Shubin

doi:10.1016/j.jaap.2012.04.010

Cited by 204 publications

(91 citation statements)

References 31 publications

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“…Furfuraldehyde and methoxyphenol (guaiacol) are the two main components accounting for more than 80 area% (percentage of total ion chromatogram peak areas) for conventional pyrolysis oil and more than 90% for microwave derived oil. This is consistent with previously published work on bio-oil [29,30]. While in the case of conventional pyrolysis, the methoxyphenol content decreases with increasing heating rate, the reverse is shown for microwave-facilitated pyrolysis in that the methoxyphenol content increases with increasing power.…”

Section: Effect Of Heating Rate On Oil Product Compositionsupporting

confidence: 92%

Conventional and microwave-assisted pyrolysis of biomass under different heating rates

Budarin

Gronnow³

et al. 2014

Journal of Analytical and Applied Pyrolysis

145

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Abstract:Biomass was subjected to conventional and microwave pyrolysis, to determine the influence of each process on the yield and composition of the derived gas, oil and char products.The influence of pyrolysis temperature and heating rate for the conventional pyrolysis and the microwave power was investigated. Two major stages of gas release were observed during biomass pyrolysis, the first being CO/CO 2 and the second one CH 4 /H 2 . This two-stage gas release was much more obvious for the conventional pyrolysis. While similar yield of liquid was obtained for both cases of conventional and microwave pyrolysis (~46 wt.%), higher gas yield was produced for the conventional pyrolysis; it is suggested that microwave pyrolysis is much faster. When the heating rate was increased, the peak release of CO and CO 2 was moved to higher reaction temperature for both conventional (500 °C) and microwave pyrolysis (200 °C). The production of CH 4 and H 2 were very low at a conventional pyrolysis temperature of 310 °C and microwave pyrolysis temperature of 200 °C (600 and 900 W). However, at higher heating rate of microwave pyrolysis, clear release of CH 4 was observed. This work tentatively demonstrates possible connections and difference for biomass pyrolysis using two different heating resources (conventional and microwave heating).

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Section: Effect Of Heating Rate On Oil Product Compositionsupporting

confidence: 92%

Conventional and microwave-assisted pyrolysis of biomass under different heating rates

Budarin

Gronnow³

et al. 2014

Journal of Analytical and Applied Pyrolysis

145

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“…The presence of xylans was found at 1034 to 1040 cm -1 (Egüés et al 2013). The band at 895 cm -1 is due to β-glucosidic linkage between monosaccharides (Lv and Wu 2012). The characteristic band of uronic acid occurred at 1598 cm -1 (Sun et al 2014).…”

Section: Ftir Analysismentioning

confidence: 96%

Thermal Treatment of Poplar Hemicelluloses at 180 to 220 °C under Nitrogen Atmosphere

Liang¹,

Wang²

2016

BioResources

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Hemicelluloses were separated from poplar wood and exposed to thermal treatment. Changes in chemical content were investigated from 180 °C to 220 °C in a nitrogen atmosphere. Fourier transform infrared spectroscopy, X-ray diffraction, and differential thermal gravimetric analysis were used to characterize the hemicellulose before and after the thermal treatment. The effects of temperature on hygroscopicity and color were measured. The results showed that hemicelluloses were sensitive to temperature. β-glucosidic bonds and side chains in hemicelluloses were cleaved around 180 °C, and the increased temperature promoted the breaking process. Esterification reactions happened during the treatment. When the treatment temperature reached 220 °C, all side chains broke down, and partial carbonization occurred. Therefore, the color became darker, and the hydrophobicity increased. This study could help to explain the changes in wood that occur during thermal treatment.

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“…Figure 8 gives the general proposed mechanism in the presence of iron particles. The main reactions were pyrolysis and carbonation of kraft lignin when the temperature was between 250 and 500 °C (Lv and Wu 2012). With the help of iron particles, polyolefin compounds are transformed to amorphous carbon (a-C) via catalytic dehydrogenation.…”

Section: Proposed Mechanisms Involved In Formation Of Graphenementioning

confidence: 99%

Preparation and Characterization of Biobased Graphene from Kraft Lignin

2017

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Graphene was manufactured from commercial kraft lignin, and its forming mechanism, structure, and properties were investigated. A single factor test was employed to determine the optimum conditions of the production of graphene nanosheets. Kraft lignin was mixed with iron powders as catalyst with different weight ratios. The mixed carbon source and catalyst were thermally treated at 1000 °C and incubated for a period of time in a tubular furnace. The thermally treated carbon materials were analyzed by field emission scanning electron microscopy (FE-SEM), Raman spectroscopy, atomic force microscopy (AFM), Fourier transform infrared spectroscopy (FTIR), and X-ray diffraction (XRD). The preferable conditions for production of graphene nanosheets from kraft lignin were determined. The graphene fold structure was obtained after thermally treating for 90 min when the ratio of carbon source to iron was 3:1. The results revealed that folded lamellar graphene structure increased with greater holding time. Carbon nanotubes (CNTs) were observed after thermal treatment for 105 min. These results indicate the formation of graphite crystal structure and multi-layered graphene from kraft lignin in the presence of iron catalyst.

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Analytical pyrolysis studies of corn stalk and its three main components by TG-MS and Py-GC/MS

Cited by 204 publications

References 31 publications

Conventional and microwave-assisted pyrolysis of biomass under different heating rates

Conventional and microwave-assisted pyrolysis of biomass under different heating rates

Thermal Treatment of Poplar Hemicelluloses at 180 to 220 °C under Nitrogen Atmosphere

Preparation and Characterization of Biobased Graphene from Kraft Lignin

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