Particle residence time and particle mixing in a scaled internal circulating fluidized bed

Ralf Kehlenbeck, John G. Yates, Renzo Di Felice, Hermann Hofbauer, Reinhard Rauch

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

A process is under development for the steam gasification of biomass to produce a hydrogen-rich gas for use with a fuel cell to generate electricity on a local scale. A pilot plant is currently under construction in southern Italy operated with a circulating fluidized bed, and to predict the fluid dynamic conditions within the plant, a cold laboratory rig was built according to existing scaling laws, and experimental studies were carried out. In this paper, we present the experimental results concerning the solids residence time of particles introduced into the system and the particle mixing in the "gasifier" section of the model. Both parameters are of fundamental importance for the operation of the pilot plant as they determine the performance of the gasification process. It is shown that the biomass particles spend sufficient time in the gasifier to be fully gasified, and an equation is derived to predict the mean residence time of the biomass particles as a function of the dimensionless mass turnover of the circulating bed material. In addition, it is shown that the biomass particles are well mixed within the circulating bed material. One reason for this is a result of the geometric design of the apparatus.

Original languageEnglish
Pages (from-to)2637-2645
Number of pages9
JournalIndustrial and Engineering Chemistry Research
Volume41
Issue number11
Publication statusPublished - May 29 2002
Externally publishedYes

Fingerprint

Fluidized beds
residence time
Biomass
Pilot plants
Gasification
biomass
Scaling laws
Steam
Fluid dynamics
fluid dynamics
Fuel cells
Hydrogen
fuel cell
Electricity
Gases
electricity
turnover
experimental study
particle
hydrogen

ASJC Scopus subject areas

  • Polymers and Plastics
  • Environmental Science(all)
  • Chemical Engineering (miscellaneous)

Cite this

Kehlenbeck, R., Yates, J. G., Di Felice, R., Hofbauer, H., & Rauch, R. (2002). Particle residence time and particle mixing in a scaled internal circulating fluidized bed. Industrial and Engineering Chemistry Research, 41(11), 2637-2645.

Particle residence time and particle mixing in a scaled internal circulating fluidized bed. / Kehlenbeck, Ralf; Yates, John G.; Di Felice, Renzo; Hofbauer, Hermann; Rauch, Reinhard.

In: Industrial and Engineering Chemistry Research, Vol. 41, No. 11, 29.05.2002, p. 2637-2645.

Research output: Contribution to journalArticle

Kehlenbeck, R, Yates, JG, Di Felice, R, Hofbauer, H & Rauch, R 2002, 'Particle residence time and particle mixing in a scaled internal circulating fluidized bed', Industrial and Engineering Chemistry Research, vol. 41, no. 11, pp. 2637-2645.
Kehlenbeck R, Yates JG, Di Felice R, Hofbauer H, Rauch R. Particle residence time and particle mixing in a scaled internal circulating fluidized bed. Industrial and Engineering Chemistry Research. 2002 May 29;41(11):2637-2645.
Kehlenbeck, Ralf ; Yates, John G. ; Di Felice, Renzo ; Hofbauer, Hermann ; Rauch, Reinhard. / Particle residence time and particle mixing in a scaled internal circulating fluidized bed. In: Industrial and Engineering Chemistry Research. 2002 ; Vol. 41, No. 11. pp. 2637-2645.
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