Abstract
In common carbon conversion models, effective diffusion is considered to describe mass transport of reactive gases in porous char particles. Conventionally, effective diffusion is determined by taking porosity and tortuosity of the solid char into account, however, the tortuosity cannot be determined experimentally. Therefore, values for the tortuosity are mainly chosen to fit the respective model to experimental data. Here, we present the determination of effective diffusion by measuring the sorption kinetics utilizing a volumetric sorption analyzer to circumvent the problem of obtaining proper data for tortuosity. For this purpose, sorption kinetics were determined for carbon dioxide and methane at temperatures of (25 and 50) °C and pressures up to 115 kPa in a synthetic lignite-like solid fuel.
| Original language | English |
|---|---|
| Pages (from-to) | 1792-1797 |
| Number of pages | 6 |
| Journal | Energy Procedia |
| Volume | 158 |
| DOIs | |
| Publication status | Published - Feb 2019 |
| Event | 10th International Conference on Applied Energy, ICAE 2018 - Hong Kong, China Duration: 22 Aug 2018 → 25 Aug 2018 |
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Gas diffusion and sorption in carbon conversion. / Wedler, Carsten; Arami-Niya, Arash; Xiao, Gongkui; Span, Roland; May, Eric F.; Richter, Markus.
In: Energy Procedia, Vol. 158, 02.2019, p. 1792-1797.Research output: Contribution to journal › Conference article
TY - JOUR
T1 - Gas diffusion and sorption in carbon conversion
AU - Wedler, Carsten
AU - Arami-Niya, Arash
AU - Xiao, Gongkui
AU - Span, Roland
AU - May, Eric F.
AU - Richter, Markus
PY - 2019/2
Y1 - 2019/2
N2 - In common carbon conversion models, effective diffusion is considered to describe mass transport of reactive gases in porous char particles. Conventionally, effective diffusion is determined by taking porosity and tortuosity of the solid char into account, however, the tortuosity cannot be determined experimentally. Therefore, values for the tortuosity are mainly chosen to fit the respective model to experimental data. Here, we present the determination of effective diffusion by measuring the sorption kinetics utilizing a volumetric sorption analyzer to circumvent the problem of obtaining proper data for tortuosity. For this purpose, sorption kinetics were determined for carbon dioxide and methane at temperatures of (25 and 50) °C and pressures up to 115 kPa in a synthetic lignite-like solid fuel.
AB - In common carbon conversion models, effective diffusion is considered to describe mass transport of reactive gases in porous char particles. Conventionally, effective diffusion is determined by taking porosity and tortuosity of the solid char into account, however, the tortuosity cannot be determined experimentally. Therefore, values for the tortuosity are mainly chosen to fit the respective model to experimental data. Here, we present the determination of effective diffusion by measuring the sorption kinetics utilizing a volumetric sorption analyzer to circumvent the problem of obtaining proper data for tortuosity. For this purpose, sorption kinetics were determined for carbon dioxide and methane at temperatures of (25 and 50) °C and pressures up to 115 kPa in a synthetic lignite-like solid fuel.
KW - Carbon conversion
KW - Effective diffusion coefficients
KW - Oxyfuel
KW - Sorption kinetics
KW - Synthetic fuel
UR - http://www.scopus.com/inward/record.url?scp=85063867731&partnerID=8YFLogxK
U2 - 10.1016/j.egypro.2019.01.422
DO - 10.1016/j.egypro.2019.01.422
M3 - Conference article
VL - 158
SP - 1792
EP - 1797
JO - Energy Procedia
JF - Energy Procedia
SN - 1876-6102
ER -