Abstract
This paper presents a thermochemical regenerative heat recovery process for utilizing the waste heat of oxy-fuel furnaces, with three significant modifications compared to current state-of-the-art reforming concepts. (I) Experimental tests with a reformer test rig were performed, in order to investigate the bi-reforming of methane into syngas by using water and carbon dioxide with a steam-to-carbon ratio of 0.5. The measured syngas concentrations were compared to calculated equilibrium values and carbon deposits were determined. A methane conversion rate of 95.3% was achieved. (II) Carbon deposits in a regenerator bed are usually burned with purge gases. In contrast to this procedure, oxygen was added to the fuel/exhaust gas mixture in order to cause tri-reforming of methane with a steam-to-carbon ratio of 0.4. The syngas concentrations were compared to equilibrium values and it was found, that tri-reforming significantly reduces carbon formation. A methane conversion rate of 96.7% was achieved. (III) Furthermore, reforming and regeneration cycles were coupled and it was found that the temperature profile within the TCR regenerator bed material varies greatly from that of a common regenerator. Regeneration with water and carbon dioxide was sufficient to eliminate all carbon deposits.
| Original language | English |
|---|---|
| Pages (from-to) | 381-391 |
| Number of pages | 11 |
| Journal | Energy |
| Volume | 155 |
| DOIs | |
| Publication status | Published - 15 Jul 2018 |
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Keywords
- Bi- and tri-reforming of methane
- Carbon formation
- Oxy-fuel furnace
- Syngas
- Thermochemical regeneration
- Waste heat recovery
ASJC Scopus subject areas
- Civil and Structural Engineering
- Building and Construction
- Pollution
- Mechanical Engineering
- Industrial and Manufacturing Engineering
- Electrical and Electronic Engineering
Cite this
An experimental study of a thermochemical regeneration waste heat recovery process using a reformer unit. / Gaber, Christian; Demuth, Martin; Prieler, René; Schluckner, Christoph; Hochenauer, Christoph.
In: Energy, Vol. 155, 15.07.2018, p. 381-391.Research output: Contribution to journal › Article › Research › peer-review
}
TY - JOUR
T1 - An experimental study of a thermochemical regeneration waste heat recovery process using a reformer unit
AU - Gaber, Christian
AU - Demuth, Martin
AU - Prieler, René
AU - Schluckner, Christoph
AU - Hochenauer, Christoph
PY - 2018/7/15
Y1 - 2018/7/15
N2 - This paper presents a thermochemical regenerative heat recovery process for utilizing the waste heat of oxy-fuel furnaces, with three significant modifications compared to current state-of-the-art reforming concepts. (I) Experimental tests with a reformer test rig were performed, in order to investigate the bi-reforming of methane into syngas by using water and carbon dioxide with a steam-to-carbon ratio of 0.5. The measured syngas concentrations were compared to calculated equilibrium values and carbon deposits were determined. A methane conversion rate of 95.3% was achieved. (II) Carbon deposits in a regenerator bed are usually burned with purge gases. In contrast to this procedure, oxygen was added to the fuel/exhaust gas mixture in order to cause tri-reforming of methane with a steam-to-carbon ratio of 0.4. The syngas concentrations were compared to equilibrium values and it was found, that tri-reforming significantly reduces carbon formation. A methane conversion rate of 96.7% was achieved. (III) Furthermore, reforming and regeneration cycles were coupled and it was found that the temperature profile within the TCR regenerator bed material varies greatly from that of a common regenerator. Regeneration with water and carbon dioxide was sufficient to eliminate all carbon deposits.
AB - This paper presents a thermochemical regenerative heat recovery process for utilizing the waste heat of oxy-fuel furnaces, with three significant modifications compared to current state-of-the-art reforming concepts. (I) Experimental tests with a reformer test rig were performed, in order to investigate the bi-reforming of methane into syngas by using water and carbon dioxide with a steam-to-carbon ratio of 0.5. The measured syngas concentrations were compared to calculated equilibrium values and carbon deposits were determined. A methane conversion rate of 95.3% was achieved. (II) Carbon deposits in a regenerator bed are usually burned with purge gases. In contrast to this procedure, oxygen was added to the fuel/exhaust gas mixture in order to cause tri-reforming of methane with a steam-to-carbon ratio of 0.4. The syngas concentrations were compared to equilibrium values and it was found, that tri-reforming significantly reduces carbon formation. A methane conversion rate of 96.7% was achieved. (III) Furthermore, reforming and regeneration cycles were coupled and it was found that the temperature profile within the TCR regenerator bed material varies greatly from that of a common regenerator. Regeneration with water and carbon dioxide was sufficient to eliminate all carbon deposits.
KW - Bi- and tri-reforming of methane
KW - Carbon formation
KW - Oxy-fuel furnace
KW - Syngas
KW - Thermochemical regeneration
KW - Waste heat recovery
UR - http://www.scopus.com/inward/record.url?scp=85047003266&partnerID=8YFLogxK
U2 - 10.1016/j.energy.2018.04.154
DO - 10.1016/j.energy.2018.04.154
M3 - Article
VL - 155
SP - 381
EP - 391
JO - Energy (Oxford)
JF - Energy (Oxford)
SN - 0360-5442
ER -