Study of the pyrolysis of biomass using thermo-gravimetric analysis (TGA) and concentration measurements of the evolved species

Dong Kyun Seo, Sang Shin Park, Jungho Hwang, Tae U. Yu

Research output: Contribution to journalArticle

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Abstract

The mass losses of biomass and the mole fractions of evolved species during biomass pyrolysis were measured using a thermo-gravimetric analyzer and a real-time gas analyzer, respectively. Each biomass sample (sawdust) was pyrolyzed in a lab-scale furnace, in a nitrogen atmosphere under non-isothermal conditions at heating rates of 5, 10, 20, and 30°C/min until the furnace wall temperature reached 900 °C. Using a non-isothermal kinetic method based on a first-order model, the experimental data from the thermo-gravimetric analysis (TGA) and real-time gas analysis (GA) were interpreted using a single model and a parallel model, respectively. Using the TGA data, the activation energy (E) and pre-exponential factor (A) were 1451kJ/mol and 2.67E+111/min, respectively. Utilizing both the TGA and GA data, the calculated activation energies for CO, H2{1} 11, H2{2}, THC, and the liquids (tar+water) were 41.7, 39.6, 51.1, 37.6, and 128.4 kJ/mol, respectively. By subtracting the total gaseous mass from the DTG (derived thermogravimetric) data, the yield of the liquids was obtained and was found to be higher (58-64%) than the yields of the pyrolyzed gas (20-25%) or of the char (10-12%). The cold gas efficiency (CGE) ranged from 0.38 to 0.47.

Original languageEnglish
Pages (from-to)66-73
Number of pages8
JournalJournal of Analytical and Applied Pyrolysis
Volume89
Issue number1
DOIs
Publication statusPublished - 2010 Jan 1

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Thermogravimetric analysis
Biomass
Pyrolysis
Gas fuel analysis
Gases
Tar-Water
Furnaces
Activation energy
Sawdust
Dronabinol
Tar
Liquids
Carbon Monoxide
Heating rate
Nitrogen
Kinetics
Water
Temperature

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

Cite this

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title = "Study of the pyrolysis of biomass using thermo-gravimetric analysis (TGA) and concentration measurements of the evolved species",
abstract = "The mass losses of biomass and the mole fractions of evolved species during biomass pyrolysis were measured using a thermo-gravimetric analyzer and a real-time gas analyzer, respectively. Each biomass sample (sawdust) was pyrolyzed in a lab-scale furnace, in a nitrogen atmosphere under non-isothermal conditions at heating rates of 5, 10, 20, and 30°C/min until the furnace wall temperature reached 900 °C. Using a non-isothermal kinetic method based on a first-order model, the experimental data from the thermo-gravimetric analysis (TGA) and real-time gas analysis (GA) were interpreted using a single model and a parallel model, respectively. Using the TGA data, the activation energy (E) and pre-exponential factor (A) were 1451kJ/mol and 2.67E+111/min, respectively. Utilizing both the TGA and GA data, the calculated activation energies for CO, H2{1} 11, H2{2}, THC, and the liquids (tar+water) were 41.7, 39.6, 51.1, 37.6, and 128.4 kJ/mol, respectively. By subtracting the total gaseous mass from the DTG (derived thermogravimetric) data, the yield of the liquids was obtained and was found to be higher (58-64{\%}) than the yields of the pyrolyzed gas (20-25{\%}) or of the char (10-12{\%}). The cold gas efficiency (CGE) ranged from 0.38 to 0.47.",
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Study of the pyrolysis of biomass using thermo-gravimetric analysis (TGA) and concentration measurements of the evolved species. / Seo, Dong Kyun; Park, Sang Shin; Hwang, Jungho; Yu, Tae U.

In: Journal of Analytical and Applied Pyrolysis, Vol. 89, No. 1, 01.01.2010, p. 66-73.

Research output: Contribution to journalArticle

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AB - The mass losses of biomass and the mole fractions of evolved species during biomass pyrolysis were measured using a thermo-gravimetric analyzer and a real-time gas analyzer, respectively. Each biomass sample (sawdust) was pyrolyzed in a lab-scale furnace, in a nitrogen atmosphere under non-isothermal conditions at heating rates of 5, 10, 20, and 30°C/min until the furnace wall temperature reached 900 °C. Using a non-isothermal kinetic method based on a first-order model, the experimental data from the thermo-gravimetric analysis (TGA) and real-time gas analysis (GA) were interpreted using a single model and a parallel model, respectively. Using the TGA data, the activation energy (E) and pre-exponential factor (A) were 1451kJ/mol and 2.67E+111/min, respectively. Utilizing both the TGA and GA data, the calculated activation energies for CO, H2{1} 11, H2{2}, THC, and the liquids (tar+water) were 41.7, 39.6, 51.1, 37.6, and 128.4 kJ/mol, respectively. By subtracting the total gaseous mass from the DTG (derived thermogravimetric) data, the yield of the liquids was obtained and was found to be higher (58-64%) than the yields of the pyrolyzed gas (20-25%) or of the char (10-12%). The cold gas efficiency (CGE) ranged from 0.38 to 0.47.

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