Abstract
Steam gasification of chars from the pyrolysis of a Japanese bamboo and cedar was studied using a reactor that enabled experimental definition of the gas composition in the vicinity of gasifying char particles. Intraparticle diffusion of neither steam nor the product gases influenced the kinetics of gasification. The chars underwent noncatalytic and catalytic gasification in parallel. The noncatalytic gasification, in which kinetic parameters were successfully defined by those for the gasification of the acid-washed char, was firstorder with respect to the amount of residual carbon over the entire range of char conversion. In consequence of this, contribution of the catalytic gasification was quantified as a function of the char conversion. Among the inherent alkali and alkaline earth metallic species, potassium (K) played the major catalytic role and its overall activity changed via a maximum in the course of gasification, suggesting the presence of optimum sizes of clusters or particles of K catalyst. The noncatalytic and catalytic reactions obeyed respective Langmuir-Hinshelwood mechanisms that involved inhibition by H 2.
| Original language | English |
|---|---|
| Pages (from-to) | 108-116 |
| Number of pages | 9 |
| Journal | Energy and Fuels |
| Volume | 24 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - Jan 21 2010 |
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All Science Journal Classification (ASJC) codes
- Chemical Engineering(all)
- Fuel Technology
- Energy Engineering and Power Technology
Cite this
Catalytic and noncatalytic mechanisms in steam gasification of char from the pyrolysis of biomass. / Kajita, Makiko; Kimura, Tokuji; Norinaga, Koyo; Li, Chun Zhu; Jun-Ichiro, Hayashi.
In: Energy and Fuels, Vol. 24, No. 1, 21.01.2010, p. 108-116.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Catalytic and noncatalytic mechanisms in steam gasification of char from the pyrolysis of biomass
AU - Kajita, Makiko
AU - Kimura, Tokuji
AU - Norinaga, Koyo
AU - Li, Chun Zhu
AU - Jun-Ichiro, Hayashi
PY - 2010/1/21
Y1 - 2010/1/21
N2 - Steam gasification of chars from the pyrolysis of a Japanese bamboo and cedar was studied using a reactor that enabled experimental definition of the gas composition in the vicinity of gasifying char particles. Intraparticle diffusion of neither steam nor the product gases influenced the kinetics of gasification. The chars underwent noncatalytic and catalytic gasification in parallel. The noncatalytic gasification, in which kinetic parameters were successfully defined by those for the gasification of the acid-washed char, was firstorder with respect to the amount of residual carbon over the entire range of char conversion. In consequence of this, contribution of the catalytic gasification was quantified as a function of the char conversion. Among the inherent alkali and alkaline earth metallic species, potassium (K) played the major catalytic role and its overall activity changed via a maximum in the course of gasification, suggesting the presence of optimum sizes of clusters or particles of K catalyst. The noncatalytic and catalytic reactions obeyed respective Langmuir-Hinshelwood mechanisms that involved inhibition by H 2.
AB - Steam gasification of chars from the pyrolysis of a Japanese bamboo and cedar was studied using a reactor that enabled experimental definition of the gas composition in the vicinity of gasifying char particles. Intraparticle diffusion of neither steam nor the product gases influenced the kinetics of gasification. The chars underwent noncatalytic and catalytic gasification in parallel. The noncatalytic gasification, in which kinetic parameters were successfully defined by those for the gasification of the acid-washed char, was firstorder with respect to the amount of residual carbon over the entire range of char conversion. In consequence of this, contribution of the catalytic gasification was quantified as a function of the char conversion. Among the inherent alkali and alkaline earth metallic species, potassium (K) played the major catalytic role and its overall activity changed via a maximum in the course of gasification, suggesting the presence of optimum sizes of clusters or particles of K catalyst. The noncatalytic and catalytic reactions obeyed respective Langmuir-Hinshelwood mechanisms that involved inhibition by H 2.
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U2 - 10.1021/ef900513a
DO - 10.1021/ef900513a
M3 - Article
AN - SCOPUS:77149142889
VL - 24
SP - 108
EP - 116
JO - Energy & Fuels
JF - Energy & Fuels
SN - 0887-0624
IS - 1
ER -