Catalytic effects of potassium on biomass pyrolysis, combustion and torrefaction

Michal Safar, Bo Jhih Lin, Wei-Hsin Chen, David Langauer, Jo-Shu Chang, H. Raclavska, Anélie Pétrissans, Patrick Rousset, Mathieu Pétrissans

Research output: Contribution to journalArticle

Abstract

Potassium is a natural catalyst in biomass thermochemical conversion and plays an essential role in plant's growth. To figure out the catalytic effects of potassium on the thermochemical behaviors of biomass, the pyrolysis, combustion, and torrefaction characteristics of rubber wood are comprehensively studied using a thermogravimetric analyzer where the biomass is impregnated by potassium carbonate (K2CO3) at different concentrations. The impregnated potassium is clearly exhibited in the spectra of Fourier-transform infrared spectroscopy, while X-ray diffraction indicate that the cellulose crystallinity decreases with increasing the potassium concentration which increases the biomass reactivity in pyrolysis. The ignition temperature of the potassium-impregnated biomass is lowered slightly when compared with the raw biomass; alternatively, its burnout temperature is reduced profoundly, suggesting that the addition of potassium into the biomass can substantially intensify its oxidative reactivity. Considering the treated biomass torrefaction, its cellulose decomposition at 250 °C is intensified, rendering a reduction in the solid yield with increasing potassium concentration. With the same mass loss at 200–300 °C, at least 28% of torrefaction time can be saved for the potassium-impregnated biomass. Accordingly, the catalytic effect of potassium on biomass thermochemical conversion is clearly outlined. Moreover, the produced potassium-rich biochar is conducive to the developments of carbon storage, soil amendment, and negative emissions technologies.

LanguageEnglish
Pages346-355
Number of pages10
JournalApplied Energy
Volume235
DOIs
Publication statusPublished - 2019 Feb 1

Fingerprint

pyrolysis
Potassium
Biomass
Pyrolysis
potassium
combustion
biomass
Cellulose
cellulose
effect
Potash
soil amendment
crystallinity
rubber
FTIR spectroscopy
Fourier transform infrared spectroscopy
Ignition
carbon sequestration
Wood
Rubber

All Science Journal Classification (ASJC) codes

  • Building and Construction
  • Energy(all)
  • Mechanical Engineering
  • Management, Monitoring, Policy and Law

Cite this

Safar, Michal ; Lin, Bo Jhih ; Chen, Wei-Hsin ; Langauer, David ; Chang, Jo-Shu ; Raclavska, H. ; Pétrissans, Anélie ; Rousset, Patrick ; Pétrissans, Mathieu. / Catalytic effects of potassium on biomass pyrolysis, combustion and torrefaction. In: Applied Energy. 2019 ; Vol. 235. pp. 346-355.
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Safar, M, Lin, BJ, Chen, W-H, Langauer, D, Chang, J-S, Raclavska, H, Pétrissans, A, Rousset, P & Pétrissans, M 2019, 'Catalytic effects of potassium on biomass pyrolysis, combustion and torrefaction' Applied Energy, vol. 235, pp. 346-355. https://doi.org/10.1016/j.apenergy.2018.10.065

Catalytic effects of potassium on biomass pyrolysis, combustion and torrefaction. / Safar, Michal; Lin, Bo Jhih; Chen, Wei-Hsin; Langauer, David; Chang, Jo-Shu; Raclavska, H.; Pétrissans, Anélie; Rousset, Patrick; Pétrissans, Mathieu.

In: Applied Energy, Vol. 235, 01.02.2019, p. 346-355.

Research output: Contribution to journalArticle

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T1 - Catalytic effects of potassium on biomass pyrolysis, combustion and torrefaction

AU - Safar, Michal

AU - Lin, Bo Jhih

AU - Chen, Wei-Hsin

AU - Langauer, David

AU - Chang, Jo-Shu

AU - Raclavska, H.

AU - Pétrissans, Anélie

AU - Rousset, Patrick

AU - Pétrissans, Mathieu

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