Gasification reactivity of biomass chars with CO2

Dong Kyun Seo, Sun Ki Lee, Min Woong Kang, Jungho Hwang, Tae U. Yu

Research output: Contribution to journalArticle

72 Citations (Scopus)

Abstract

In this study, carbon conversion was calculated from the data obtained with a real-time gas analyzer. In a lab-scale furnace, each biomass sample was pyrolyzed in a nitrogen environment and became biomass char. For preparation of the char, the furnace was electrically heated over 40min up to the wall temperature of 850°C, and maintained at the same temperature over 17min. The furnace was again heated over 3min to a temperature higher than 850°C and then CO2 was injected. The biomass char was then gasified with CO2 under isothermal conditions. The reactivity of biomass char was investigated at various temperatures and CO2 concentrations. The VRM (volume reaction model), SCM (shrinking core model), and RPM (random pore model) were used to interpret the experimental data. For each model, the activation energy (E) and pre-exponential factor (A) of the biomass char-CO2 reaction were determined from gas-analysis data by using the Arrhenius equation. For the RPM, the apparent reaction order was determined. According to this study, it was found that the experimental data agreed better with the RPM than with the other two models. Through BET analyses, it was found that the structural parameter (ψ) of the surface area for the RPM was obtained as 4.22.

Original languageEnglish
Pages (from-to)1946-1953
Number of pages8
JournalBiomass and Bioenergy
Volume34
Issue number12
DOIs
Publication statusPublished - 2010 Dec 1

Fingerprint

gasification
Gasification
Biomass
carbon dioxide
biomass
furnaces
Furnaces
temperature
gases
Temperature
Gas fuel analysis
activation energy
gas
surface area
data analysis
Activation energy
Nitrogen
Carbon
carbon
nitrogen

All Science Journal Classification (ASJC) codes

  • Forestry
  • Renewable Energy, Sustainability and the Environment
  • Agronomy and Crop Science
  • Waste Management and Disposal

Cite this

Seo, Dong Kyun ; Lee, Sun Ki ; Kang, Min Woong ; Hwang, Jungho ; Yu, Tae U. / Gasification reactivity of biomass chars with CO2. In: Biomass and Bioenergy. 2010 ; Vol. 34, No. 12. pp. 1946-1953.
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Gasification reactivity of biomass chars with CO2. / Seo, Dong Kyun; Lee, Sun Ki; Kang, Min Woong; Hwang, Jungho; Yu, Tae U.

In: Biomass and Bioenergy, Vol. 34, No. 12, 01.12.2010, p. 1946-1953.

Research output: Contribution to journalArticle

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