An experimental investigation of the solids flow pattern in gas-flowing solids-fixed bed contactors is presented. The apparatus and procedures for determining the dynamic and static solids holdups, solids residence time distribution and the extent and rate of the exchange between particles in the static and dynamic solids holdup are described in detail. Experiments were performed in a bench scale system, containing a column (diameter similar to 60 mm) packed with glass beads of 16 mm in diameter packed up to the height of 0.8 m. Tracer experiments with a step input in flowing solids phase were used for determining the residence time distribution and exchange between particles. Fine solids (spheres with mean diameter of 291 pm) of two different colors (all other properties being the same) were used in the tracer experiments to determine the residence time distribution and the exchange between static and dynamic solids holdup. In both types of experiments, the response curves have been o...btained via color analysis of digital photos. All experiments have been repeated at different operating conditions, with a broad variation of solids mass flux and gas velocity, and reproducibility at set conditions was checked. The obtained experimental results are discussed and the observed important characteristics of the solids flow pattern are outlined. The effects of the solids flux and gas velocity on the solids flow pattern are presented and analyzed.
Keywords:
Gas-flowing solids-fixed bed contactors / Multiphase reactors / Packed bed / Multiphase flow / Solids holdup / Residence time distribution
Source:
Chemical Engineering Science, 2009, 64, 10, 2501-2509
TY - JOUR
AU - Nikačević, Nikola
AU - Petkovska, Menka
AU - Duduković, Milorad P.
PY - 2009
UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1516
AB - An experimental investigation of the solids flow pattern in gas-flowing solids-fixed bed contactors is presented. The apparatus and procedures for determining the dynamic and static solids holdups, solids residence time distribution and the extent and rate of the exchange between particles in the static and dynamic solids holdup are described in detail. Experiments were performed in a bench scale system, containing a column (diameter similar to 60 mm) packed with glass beads of 16 mm in diameter packed up to the height of 0.8 m. Tracer experiments with a step input in flowing solids phase were used for determining the residence time distribution and exchange between particles. Fine solids (spheres with mean diameter of 291 pm) of two different colors (all other properties being the same) were used in the tracer experiments to determine the residence time distribution and the exchange between static and dynamic solids holdup. In both types of experiments, the response curves have been obtained via color analysis of digital photos. All experiments have been repeated at different operating conditions, with a broad variation of solids mass flux and gas velocity, and reproducibility at set conditions was checked. The obtained experimental results are discussed and the observed important characteristics of the solids flow pattern are outlined. The effects of the solids flux and gas velocity on the solids flow pattern are presented and analyzed.
PB - Pergamon-Elsevier Science Ltd, Oxford
T2 - Chemical Engineering Science
T1 - Solids flow pattern in gas-flowing solids-fixed bed contactors. Part I Experimental
EP - 2509
IS - 10
SP - 2501
VL - 64
DO - 10.1016/j.ces.2009.02.029
UR - conv_3182
ER -
@article{
author = "Nikačević, Nikola and Petkovska, Menka and Duduković, Milorad P.",
year = "2009",
abstract = "An experimental investigation of the solids flow pattern in gas-flowing solids-fixed bed contactors is presented. The apparatus and procedures for determining the dynamic and static solids holdups, solids residence time distribution and the extent and rate of the exchange between particles in the static and dynamic solids holdup are described in detail. Experiments were performed in a bench scale system, containing a column (diameter similar to 60 mm) packed with glass beads of 16 mm in diameter packed up to the height of 0.8 m. Tracer experiments with a step input in flowing solids phase were used for determining the residence time distribution and exchange between particles. Fine solids (spheres with mean diameter of 291 pm) of two different colors (all other properties being the same) were used in the tracer experiments to determine the residence time distribution and the exchange between static and dynamic solids holdup. In both types of experiments, the response curves have been obtained via color analysis of digital photos. All experiments have been repeated at different operating conditions, with a broad variation of solids mass flux and gas velocity, and reproducibility at set conditions was checked. The obtained experimental results are discussed and the observed important characteristics of the solids flow pattern are outlined. The effects of the solids flux and gas velocity on the solids flow pattern are presented and analyzed.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Chemical Engineering Science",
title = "Solids flow pattern in gas-flowing solids-fixed bed contactors. Part I Experimental",
pages = "2509-2501",
number = "10",
volume = "64",
doi = "10.1016/j.ces.2009.02.029",
url = "conv_3182"
}
Nikačević, N., Petkovska, M.,& Duduković, M. P.. (2009). Solids flow pattern in gas-flowing solids-fixed bed contactors. Part I Experimental. in Chemical Engineering Science
Pergamon-Elsevier Science Ltd, Oxford., 64(10), 2501-2509.
https://doi.org/10.1016/j.ces.2009.02.029
conv_3182
Nikačević N, Petkovska M, Duduković MP. Solids flow pattern in gas-flowing solids-fixed bed contactors. Part I Experimental. in Chemical Engineering Science. 2009;64(10):2501-2509.
doi:10.1016/j.ces.2009.02.029
conv_3182 .
Nikačević, Nikola, Petkovska, Menka, Duduković, Milorad P., "Solids flow pattern in gas-flowing solids-fixed bed contactors. Part I Experimental" in Chemical Engineering Science, 64, no. 10 (2009):2501-2509,
https://doi.org/10.1016/j.ces.2009.02.029 .,
conv_3182 .
