Comparative study of pyrolysis behaviors of corn stalk and its three components

Lv, Gaojin; Wu, Shubin; Yang, Guihua; Chen, Jiachuan; Liu, Yu; Kong, Fangong

doi:10.1016/j.jaap.2013.08.005

Cited by 74 publications

(56 citation statements)

References 29 publications

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“…The gas was composed of H2 (8.93%), O2 (1.07%), N2 (71.94%), CH4 (2.04%), CO (9.71%), CO2 (1.09%), C2H2 (3.22%), C2H4 (0.98%), and C2H6 (1.02%). The GC testing conditions were an injector temperature of 50 °C, a TCD temperature of 100 °C, and a TCD current of 70 mA (Lv et al 2013).…”

Section: Gas Analysismentioning

confidence: 99%

Characterization of Thermo-Chemical Degradation and Pyrolysis Properties for Three Kinds of Biomass Residues

Liu¹,

Hua²,

Wu³

2016

BioResources

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This study investigated the thermo-chemical degradation and fast pyrolysis of watermelon seed shells (WSS), pumpkin seed shells (PSS), and sunflower seed shells (SSS). The raw materials and pyrolysis products were analyzed. The results showed that the carbon content (52.96%), hydrogen content (7.38%) and higher heating value (HHV) (23.88 MJ/kg) of PSS were highest, and the bio-oil from the PSS pyrolysis had high amounts of phenolic compounds. For SSS, the content of holocellulose (83.47 wt.%) was the highest, but the lignin content (13.62 wt.%) was lower than the other samples. The gas yield from the SSS pyrolysis was the largest and the bio-oil content of acids (acetic acid 36.53%) and ketones (1-hydroxy-2-propanone 9.90%) were higher. For WSS, the yield of the biochar was 39.14 wt.%. Additionally, the raw materials' structures were similar. The thermal decomposition process of all seed shells had three stages, i.e. dehydration, active pyrolysis, and passive pyrolysis. In all three kinds of bio-oil, the components were mainly guaiacol-type and phenol-type. The guaiacol-type in the bio-oils from PSS (43.78%) and WSS (32.33%) were higher than in the bio-oil from SSS.

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Section: Gas Analysismentioning

confidence: 99%

Characterization of Thermo-Chemical Degradation and Pyrolysis Properties for Three Kinds of Biomass Residues

Liu¹,

Hua²,

Wu³

2016

BioResources

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“…It was observed that the degradation of CS with no pitch was easier than the other materials at initial reaction stage. This was ascribed to the degradation of higher content of hemicellulose and extractive compounds with poor thermal stability, such as amino acids, fructopyranose, and protein in CS with no pitch (Lv et al 2013). And the degradation of corn leaf was easier than the other two at the second stage due to the higher cellulose in the leaf.…”

Section: Thermogravimetric Analysis (Tga)mentioning

confidence: 99%

“…Previous studies indicated that chemical inhomogeneity and structure in different corn stalk fractions were the main reasons for the different processing behaviors (Maiti et al 2007;Lv et al 2013). Hemicellulose, cellulose, and lignin are the three main components of biomass and their thermal decompositions occur at 220 to 315 °C, 315 to 400 °C, and 160 to 900 °C, respectively (Miao and Zhang 2012), to vaporize their extractives (Rao and Sharma 1998). bioresources.com Huang et al (2015).…”

Section: Introductionmentioning

confidence: 99%

Thermal Decomposition Properties of Materials from Different Parts of Corn Stalk

Huang¹,

Wu²,

Zhou³

et al. 2015

BioResources

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aTo help better utilize corn stalk (CS), pyrolysis behavior of materials from different parts of the CS including corn stalk without pith, corn root, and corn leaf were analyzed using thermogravimetric analysis (TGA) at heating rates of 5, 10, 20, and 25 °C/min. The apparent activation energies determined by the Friedman method for corn stalk without pith, corn root, and corn leaf were in the range of 26.4 to 103.6 kJ/mol, 37.6 to 69.5 kJ/mol, and 35.0 to 103.9 kJ/mol, respectively, depending on the conversion. The main thermal decomposition occurred within a temperature range of 200 to 350 °C (±10 °C). Most of the volatile materials decomposed at less than a 0.8 conversion rate. At greater than a 0.8 conversion rate, the remaining material was mainly char, and the decomposition of char proceeded at higher conversion rates. Different pyrolysis characteristics in the CS indicated that different treatments should be chosen according to different parts for achieving the optimum conversion rate in practical applications.

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“…The phenolic compounds in bio-oil are produced primarily by pyrolysis liquefaction from the lignin component of biomass; phenolics comprise about 20% of the bio-oil from biomass pyrolysis, while the content is above 55% in lignin pyrolysis oil (Lv et al 2013;Shen et al 2015;Liu et al 2016). In addition, it was also reported that the phenolic compounds are mainly phenol, 4-vinyl phenol, 2-methoxy-4-vinyl phenol, and 2,6-dimethoxy phenol (Ohra-aho et al 2005;Patwardhan et al 2011;Zhou et al 2013).…”

Section: Introductionmentioning

confidence: 99%

Influence of Alkali and Alkaline Earth Metallic Species on the Phenolic Species of Pyrolysis Oil

et al. 2017

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Bio-oil as an important renewable energy product has been successfully made from corn stalks and lignin via a fast pyrolysis process. This study investigated the effects of alkali and alkaline earth metallic species (AAEMs) on phenolic products in corn stalk and lignin pyrolysis oil. Corn stalks were demineralized with 0.5 M HCl, and lignin was doped with 0.2wt%, 2wt%, and 20wt% KCl and CaCl2, respectively. The pyrolysis experiments were conducted in a fixed bed tubular furnace ranging from 450 °C to 600 °C. It was found that AAEMs exert positive effects on the formation of char and gas and inhibit the production of bio-oil. The effect of KCl on the product distribution from lignin is somewhat stronger than CaCl2. Moreover, the content of P, HP, GP, and SP decreases after removal of AAEMs. KCl can promote the polymerization of light molecular aromatic hydrocarbons to increase the SP yield at 600 °C, whereas the effect on increase in P and HP content is relatively weaker than CaCl2. KCl and CaCl2 play notable roles in demethxylation and demethoxylation in increasing phenol content and removing the R group from the ring.

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Comparative study of pyrolysis behaviors of corn stalk and its three components

Cited by 74 publications

References 29 publications

Characterization of Thermo-Chemical Degradation and Pyrolysis Properties for Three Kinds of Biomass Residues

Characterization of Thermo-Chemical Degradation and Pyrolysis Properties for Three Kinds of Biomass Residues

Thermal Decomposition Properties of Materials from Different Parts of Corn Stalk

Influence of Alkali and Alkaline Earth Metallic Species on the Phenolic Species of Pyrolysis Oil

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