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Title: Fluidization and drying of biomass particles in a vibrating fluidized bed with pulsed gas flow

Abstract

Fluidization of biomass particles in the absence of inert bed materials has been tested in a pulsed fluidized bed with vibration, with the pulsation frequency ranging from 033 to 6.67 Hz. Intermittent fluidization at 033 Hz and apparently 'normal' fluidization at 6.67 Hz with regular bubble patterns were observed. Pulsation has proven to be effective in overcoming the bridging of irregular biomass particles induced by strong inter-particle forces. The vibration is only effective when the pulsation is inadequate, either at too low a frequency or too low in amplitude. We dried biomass in order to quantify the effectiveness of gas pulsation for fluidized bed dryers and torrefiers in terms of gas-solid contact efficiency and heat and mass transfer rates. Furthermore, the effects of gas flow rate, bed temperature, pulsation frequency and vibration intensity on drying performance have been systematically investigated. While higher temperature and gas flow rate are favored in drying, there exists an optimal range of pulsation frequency between 0.75 Hz and 1.5 Hz where gas-solid contact is enhanced in both the constant rate drying and falling rate drying periods.

Authors:
 [1];  [2];  [1];  [1];  [1];  [3];  [4];  [1];  [4]
  1. Univ. of British Columbia, Vancouver, BC (Canada). Dept. of Chemical and Biological Engineering
  2. ENSTA ParisTech, Palaiseau (France)
  3. Univ. of British Columbia, Vancouver, BC (Canada). Dept. of Chemical and Biological Engineering; Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Environmetnal Sciences Division
  4. Univ. of Tokyo (Japan). Collaborative Research Center for Energy Engineering
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
OSTI Identifier:
1334451
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Fuel Processing Technology
Additional Journal Information:
Journal Volume: 138; Journal Issue: C; Journal ID: ISSN 0378-3820
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
09 BIOMASS FUELS; Fluidized bed; Gas-solid flow; Drying; Biomass; Vibration; Pulsation; DRYER; KINETICS; SAWDUST; QUALITY; SEEDS

Citation Formats

Jia, Dening, Cathary, Océane, Peng, Jianghong, Bi, Xiaotao, Lim, C. Jim, Sokhansanj, Shahab, Liu, Yuping, Wang, Ruixu, and Tsutsumi, Atsushi. Fluidization and drying of biomass particles in a vibrating fluidized bed with pulsed gas flow. United States: N. p., 2015. Web. doi:10.1016/j.fuproc.2015.06.023.
Jia, Dening, Cathary, Océane, Peng, Jianghong, Bi, Xiaotao, Lim, C. Jim, Sokhansanj, Shahab, Liu, Yuping, Wang, Ruixu, & Tsutsumi, Atsushi. Fluidization and drying of biomass particles in a vibrating fluidized bed with pulsed gas flow. United States. https://doi.org/10.1016/j.fuproc.2015.06.023
Jia, Dening, Cathary, Océane, Peng, Jianghong, Bi, Xiaotao, Lim, C. Jim, Sokhansanj, Shahab, Liu, Yuping, Wang, Ruixu, and Tsutsumi, Atsushi. 2015. "Fluidization and drying of biomass particles in a vibrating fluidized bed with pulsed gas flow". United States. https://doi.org/10.1016/j.fuproc.2015.06.023. https://www.osti.gov/servlets/purl/1334451.
@article{osti_1334451,
title = {Fluidization and drying of biomass particles in a vibrating fluidized bed with pulsed gas flow},
author = {Jia, Dening and Cathary, Océane and Peng, Jianghong and Bi, Xiaotao and Lim, C. Jim and Sokhansanj, Shahab and Liu, Yuping and Wang, Ruixu and Tsutsumi, Atsushi},
abstractNote = {Fluidization of biomass particles in the absence of inert bed materials has been tested in a pulsed fluidized bed with vibration, with the pulsation frequency ranging from 033 to 6.67 Hz. Intermittent fluidization at 033 Hz and apparently 'normal' fluidization at 6.67 Hz with regular bubble patterns were observed. Pulsation has proven to be effective in overcoming the bridging of irregular biomass particles induced by strong inter-particle forces. The vibration is only effective when the pulsation is inadequate, either at too low a frequency or too low in amplitude. We dried biomass in order to quantify the effectiveness of gas pulsation for fluidized bed dryers and torrefiers in terms of gas-solid contact efficiency and heat and mass transfer rates. Furthermore, the effects of gas flow rate, bed temperature, pulsation frequency and vibration intensity on drying performance have been systematically investigated. While higher temperature and gas flow rate are favored in drying, there exists an optimal range of pulsation frequency between 0.75 Hz and 1.5 Hz where gas-solid contact is enhanced in both the constant rate drying and falling rate drying periods.},
doi = {10.1016/j.fuproc.2015.06.023},
url = {https://www.osti.gov/biblio/1334451}, journal = {Fuel Processing Technology},
issn = {0378-3820},
number = C,
volume = 138,
place = {United States},
year = {Thu Oct 01 00:00:00 EDT 2015},
month = {Thu Oct 01 00:00:00 EDT 2015}
}

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Effect of vibration energy on fluidization and 1–6 mm coal separation in a vibrated dense medium fluidized bed
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Lignite drying in a bench-scale pulsation-assisted fluidized bed dryer
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Drying efficiency and product quality of biomass drying: a review
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