Operational limits of ignition front propagation against air flow in packed beds of different wood fuels

Mika Horttanainen; Jaakko Saastamoinen; Pertti Sarkomaa

doi:10.1021/ef010209d

Operational limits of ignition front propagation against air flow in packed beds of different wood fuels

Mika Horttanainen^*
, Jaakko Saastamoinen
, Pertti Sarkomaa

^*Corresponding author for this work

VTT Technical Research Centre of Finland

Lappeenranta-Lahti University of Technology LUT
VTT (former employee or external)

Research output: Contribution to journal › Article › Scientific › peer-review

67 Citations (Scopus)

Abstract

Propagation of the ignition front against airflow in packed beds of different wood fuels has been studied. The results of experiments carried out with pellets and mixtures of wood chips and sawdust are presented and compared with earlier experiments with different wood fuels. Increase in particle density and size was found out to widen the range of possible airflow rates, and transfer the maximum rate of ignition front propagation toward fuel lean conditions. Increase in the average sphericity of particles decreases the porosity of the bed. Mixing of small and large particles seems to be advantageous for combustion so that small particles change the optimum airflow rate to fuel rich conditions and large particles widen the usable range of airflow rates. A correlation was found for the maximum rate of ignition front propagation in beds of wood fuels.

Original language	English
Pages (from-to)	676-686
Journal	Energy & Fuels
Volume	16
Issue number	3
DOIs	https://doi.org/10.1021/ef010209d
Publication status	Published - 2002
MoE publication type	A1 Journal article-refereed

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Keywords

biomass
biofuels
wood fuels
combustion
ignition
air flow
wood chips
sawdust
particles
packed beds
models
emissions

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10.1021/ef010209d

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title = "Operational limits of ignition front propagation against air flow in packed beds of different wood fuels",

abstract = "Propagation of the ignition front against airflow in packed beds of different wood fuels has been studied. The results of experiments carried out with pellets and mixtures of wood chips and sawdust are presented and compared with earlier experiments with different wood fuels. Increase in particle density and size was found out to widen the range of possible airflow rates, and transfer the maximum rate of ignition front propagation toward fuel lean conditions. Increase in the average sphericity of particles decreases the porosity of the bed. Mixing of small and large particles seems to be advantageous for combustion so that small particles change the optimum airflow rate to fuel rich conditions and large particles widen the usable range of airflow rates. A correlation was found for the maximum rate of ignition front propagation in beds of wood fuels.",

keywords = "biomass, biofuels, wood fuels, combustion, ignition, air flow, wood chips, sawdust, particles, packed beds, models, emissions",

author = "Mika Horttanainen and Jaakko Saastamoinen and Pertti Sarkomaa",

note = "Project code: N1SU00280",

year = "2002",

doi = "10.1021/ef010209d",

language = "English",

volume = "16",

pages = "676--686",

journal = "Energy \& Fuels",

issn = "0887-0624",

publisher = "American Chemical Society ACS",

number = "3",

}

TY - JOUR

T1 - Operational limits of ignition front propagation against air flow in packed beds of different wood fuels

AU - Horttanainen, Mika

AU - Saastamoinen, Jaakko

AU - Sarkomaa, Pertti

N1 - Project code: N1SU00280

PY - 2002

Y1 - 2002

N2 - Propagation of the ignition front against airflow in packed beds of different wood fuels has been studied. The results of experiments carried out with pellets and mixtures of wood chips and sawdust are presented and compared with earlier experiments with different wood fuels. Increase in particle density and size was found out to widen the range of possible airflow rates, and transfer the maximum rate of ignition front propagation toward fuel lean conditions. Increase in the average sphericity of particles decreases the porosity of the bed. Mixing of small and large particles seems to be advantageous for combustion so that small particles change the optimum airflow rate to fuel rich conditions and large particles widen the usable range of airflow rates. A correlation was found for the maximum rate of ignition front propagation in beds of wood fuels.

AB - Propagation of the ignition front against airflow in packed beds of different wood fuels has been studied. The results of experiments carried out with pellets and mixtures of wood chips and sawdust are presented and compared with earlier experiments with different wood fuels. Increase in particle density and size was found out to widen the range of possible airflow rates, and transfer the maximum rate of ignition front propagation toward fuel lean conditions. Increase in the average sphericity of particles decreases the porosity of the bed. Mixing of small and large particles seems to be advantageous for combustion so that small particles change the optimum airflow rate to fuel rich conditions and large particles widen the usable range of airflow rates. A correlation was found for the maximum rate of ignition front propagation in beds of wood fuels.

KW - biomass

KW - biofuels

KW - wood fuels

KW - combustion

KW - ignition

KW - air flow

KW - wood chips

KW - sawdust

KW - particles

KW - packed beds

KW - models

KW - emissions

U2 - 10.1021/ef010209d

DO - 10.1021/ef010209d

M3 - Article

SN - 0887-0624

VL - 16

SP - 676

EP - 686

JO - Energy & Fuels

JF - Energy & Fuels

IS - 3

ER -

Operational limits of ignition front propagation against air flow in packed beds of different wood fuels

Abstract

UN SDGs

Keywords

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