Visualization of Biomass Pyrolysis and Temperature Imaging in a Heated-Grid Reactor
Prins, A. J. ; Lindén, Johannes LU
; Li, Zhongshan
LU
; Bastiaans, R. J. M.
; van Oijen, J. A.
; Aldén, Marcus
LU
and de Goey, L. P. H.
(2009)
In Energy & Fuels
23(1).
p.993-1006
- Abstract
- The main advantage of a heated-grid reactor for studying pyrolysis kinetics of solid fuel samples is that high heating rates of up to 1000 K/s can be obtained. However, one of the concerns is whether the temperature distribution over the grid material is uniform and whether the presence of a thermocouple welded to the grid causes any measurement errors. Biomass samples were placed on the heated-grid reactor, and the volatiles, emitted in the biomass pyrolysis process as hot gas plumes, were imaged with an infrared camera with a high framing speed. The temporal resolved infrared images indicate that the pyrolysis process does not take place at the same rate everywhere on the grid. Two-dimensional temperature images of a heated grid made of... (More)
- The main advantage of a heated-grid reactor for studying pyrolysis kinetics of solid fuel samples is that high heating rates of up to 1000 K/s can be obtained. However, one of the concerns is whether the temperature distribution over the grid material is uniform and whether the presence of a thermocouple welded to the grid causes any measurement errors. Biomass samples were placed on the heated-grid reactor, and the volatiles, emitted in the biomass pyrolysis process as hot gas plumes, were imaged with an infrared camera with a high framing speed. The temporal resolved infrared images indicate that the pyrolysis process does not take place at the same rate everywhere on the grid. Two-dimensional temperature images of a heated grid made of stainless steel were recorded using the method of laser-induced thermometry with thermographic phosphors. As expected from a heat-transfer model, measured temperatures were found to be significantly higher than temperatures indicated by a thermocouple welded to the bottom of the grid. It was also observed that there is a large temperature gradient between the two electrodes on which the grid is connected. It is shown that replacing a wire mesh by a foil as a grid material may lead to more homogeneous temperature distribution. The paper recommends additional research to demonstrate the suitability of the heated-grid reactor for carrying out accurate measurements. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/1371919
- author
- Prins, A. J.
; Lindén, Johannes
LU
; Li, Zhongshan
LU
; Bastiaans, R. J. M.
; van Oijen, J. A.
; Aldén, Marcus
LU
and de Goey, L. P. H.
- organization
- publishing date
- 2009
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Energy & Fuels
- volume
- 23
- issue
- 1
- pages
- 993 - 1006
- publisher
- The American Chemical Society (ACS)
- external identifiers
-
- wos:000263629900147
- scopus:64249131033
- ISSN
- 0887-0624
- DOI
- 10.1021/ef800419w
- language
- English
- LU publication?
- yes
- id
- acf6c680-f699-4380-aa8e-b28c8db9e164 (old id 1371919)
- date added to LUP
- 2016-04-01 15:03:04
- date last changed
- 2022-01-28 03:54:04
@article{acf6c680-f699-4380-aa8e-b28c8db9e164,
abstract = {{The main advantage of a heated-grid reactor for studying pyrolysis kinetics of solid fuel samples is that high heating rates of up to 1000 K/s can be obtained. However, one of the concerns is whether the temperature distribution over the grid material is uniform and whether the presence of a thermocouple welded to the grid causes any measurement errors. Biomass samples were placed on the heated-grid reactor, and the volatiles, emitted in the biomass pyrolysis process as hot gas plumes, were imaged with an infrared camera with a high framing speed. The temporal resolved infrared images indicate that the pyrolysis process does not take place at the same rate everywhere on the grid. Two-dimensional temperature images of a heated grid made of stainless steel were recorded using the method of laser-induced thermometry with thermographic phosphors. As expected from a heat-transfer model, measured temperatures were found to be significantly higher than temperatures indicated by a thermocouple welded to the bottom of the grid. It was also observed that there is a large temperature gradient between the two electrodes on which the grid is connected. It is shown that replacing a wire mesh by a foil as a grid material may lead to more homogeneous temperature distribution. The paper recommends additional research to demonstrate the suitability of the heated-grid reactor for carrying out accurate measurements.}},
author = {{Prins, A. J. and Lindén, Johannes and Li, Zhongshan and Bastiaans, R. J. M. and van Oijen, J. A. and Aldén, Marcus and de Goey, L. P. H.}},
issn = {{0887-0624}},
language = {{eng}},
number = {{1}},
pages = {{993--1006}},
publisher = {{The American Chemical Society (ACS)}},
series = {{Energy & Fuels}},
title = {{Visualization of Biomass Pyrolysis and Temperature Imaging in a Heated-Grid Reactor}},
url = {{http://dx.doi.org/10.1021/ef800419w}},
doi = {{10.1021/ef800419w}},
volume = {{23}},
year = {{2009}},
}