Modeling of the catalytic effects of potassium and calcium on spruce wood gasification in CO2

Jason Kramb (Corresponding Author), Nikolai DeMartini, Magnus Perander, Antero Moilanen, Jukka Konttinen

Research output: Contribution to journalArticleScientificpeer-review

17 Citations (Scopus)

Abstract

Using previously reported thermogravimetric analysis measurements, the effects of calcium and potassium on the char gasification rate of spruce wood were modeled. Spruce wood was leached of inorganic ash elements and doped with measured amounts of potassium and calcium. The wood was gasified in an isothermal thermogravimetric analysis device in CO2 where the devolatilization of the wood, char formation and char gasification all occurred inside the preheated reactor. A new method for separating the effects of devolatilization and char gasification is presented. Kinetic models were evaluated for their ability to describe the observed catalytic effects of potassium and calcium on the gasification rate. Two modified versions of the random pore model were able to accurately describe the measured conversion rates and the parameters of the kinetic models were found to be dependent on the calcium and potassium concentrations. Empirical correlations were developed to predict the char conversion rate from only the potassium and calcium concentration of the sample.
Original languageEnglish
Pages (from-to)50-59
JournalFuel Processing Technology
Volume148
DOIs
Publication statusPublished - 2016
MoE publication typeA1 Journal article-refereed

Fingerprint

Gasification
Potassium
Calcium
Wood
Ashes
Thermogravimetric analysis
Kinetics

Keywords

  • biomass
  • gasification
  • reaction kinetics
  • modeling

Cite this

Kramb, Jason ; DeMartini, Nikolai ; Perander, Magnus ; Moilanen, Antero ; Konttinen, Jukka. / Modeling of the catalytic effects of potassium and calcium on spruce wood gasification in CO2. In: Fuel Processing Technology. 2016 ; Vol. 148. pp. 50-59.
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abstract = "Using previously reported thermogravimetric analysis measurements, the effects of calcium and potassium on the char gasification rate of spruce wood were modeled. Spruce wood was leached of inorganic ash elements and doped with measured amounts of potassium and calcium. The wood was gasified in an isothermal thermogravimetric analysis device in CO2 where the devolatilization of the wood, char formation and char gasification all occurred inside the preheated reactor. A new method for separating the effects of devolatilization and char gasification is presented. Kinetic models were evaluated for their ability to describe the observed catalytic effects of potassium and calcium on the gasification rate. Two modified versions of the random pore model were able to accurately describe the measured conversion rates and the parameters of the kinetic models were found to be dependent on the calcium and potassium concentrations. Empirical correlations were developed to predict the char conversion rate from only the potassium and calcium concentration of the sample.",
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Modeling of the catalytic effects of potassium and calcium on spruce wood gasification in CO2. / Kramb, Jason (Corresponding Author); DeMartini, Nikolai; Perander, Magnus; Moilanen, Antero; Konttinen, Jukka.

In: Fuel Processing Technology, Vol. 148, 2016, p. 50-59.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Modeling of the catalytic effects of potassium and calcium on spruce wood gasification in CO2

AU - Kramb, Jason

AU - DeMartini, Nikolai

AU - Perander, Magnus

AU - Moilanen, Antero

AU - Konttinen, Jukka

PY - 2016

Y1 - 2016

N2 - Using previously reported thermogravimetric analysis measurements, the effects of calcium and potassium on the char gasification rate of spruce wood were modeled. Spruce wood was leached of inorganic ash elements and doped with measured amounts of potassium and calcium. The wood was gasified in an isothermal thermogravimetric analysis device in CO2 where the devolatilization of the wood, char formation and char gasification all occurred inside the preheated reactor. A new method for separating the effects of devolatilization and char gasification is presented. Kinetic models were evaluated for their ability to describe the observed catalytic effects of potassium and calcium on the gasification rate. Two modified versions of the random pore model were able to accurately describe the measured conversion rates and the parameters of the kinetic models were found to be dependent on the calcium and potassium concentrations. Empirical correlations were developed to predict the char conversion rate from only the potassium and calcium concentration of the sample.

AB - Using previously reported thermogravimetric analysis measurements, the effects of calcium and potassium on the char gasification rate of spruce wood were modeled. Spruce wood was leached of inorganic ash elements and doped with measured amounts of potassium and calcium. The wood was gasified in an isothermal thermogravimetric analysis device in CO2 where the devolatilization of the wood, char formation and char gasification all occurred inside the preheated reactor. A new method for separating the effects of devolatilization and char gasification is presented. Kinetic models were evaluated for their ability to describe the observed catalytic effects of potassium and calcium on the gasification rate. Two modified versions of the random pore model were able to accurately describe the measured conversion rates and the parameters of the kinetic models were found to be dependent on the calcium and potassium concentrations. Empirical correlations were developed to predict the char conversion rate from only the potassium and calcium concentration of the sample.

KW - biomass

KW - gasification

KW - reaction kinetics

KW - modeling

U2 - 10.1016/j.fuproc.2016.01.031

DO - 10.1016/j.fuproc.2016.01.031

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JO - Fuel Processing Technology

JF - Fuel Processing Technology

SN - 0378-3820

ER -