Impacts of Bed Material Activation and Fuel Moisture Content on the Gasification Rate of Biomass Char in a Fluidized Bed
Journal article, 2019

The use of certain bed materials has been Activated found to increase the steam gasification rate of biomass char. olivine The present work investigates how this phenomenon is influenced by different parameters (e.g., temperature, fuel type, and fuel moisture content), using a laboratory-scale bubbling fluidized bed gasifier. Silica sand, fresh olivine, and activated olivine were employed as bed materials, and three biomass fuels (wood chips, wood pellets, and forest residue pellets) were considered. Switching the bed material from silica sand to activated olivine resulted in a significant increase in the char gasification rate for all three fuels, with further increases noted as the fuel particle size was decreased. The observed effect was strongest (up to 4-fold) during the initial conversion phase (char gasification degrees < 20%) when the temperature was relatively low (<= 800 degrees C). The moisture content of the wood chips (0-40%) had no significant effect on the char gasification rate.


Louise Lundberg

Chalmers, Space, Earth and Environment, Energy Technology

Placid A. Tchoffor

RISE Research Institutes of Sweden

David Pallarès

Chalmers, Space, Earth and Environment, Energy Technology

Henrik Thunman

Chalmers, Space, Earth and Environment, Energy Technology

Kent O. Davidsson

RISE Research Institutes of Sweden

Industrial & Engineering Chemistry Research

0888-5885 (ISSN) 1520-5045 (eISSN)

Vol. 58 12 4802-4809

Subject Categories

Energy Engineering

Chemical Process Engineering



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8/6/2019 1