TY - GEN
T1 - Influencing Parameters on the Sintering Process of Steel Slag-based Ceramics for High-temperature Thermal Energy Storage
AU - Al Naimi, Kholoud M.
AU - Hoffmann, Jean Francois
AU - Ali, Khalid Al
AU - Calvet, Nicolas
N1 - Funding Information:
This work is funded by Khalifa University through the student support grant number SSG 8474000072. This research is supported by the Government of Abu Dhabi to help fulfill the vision of the late President Sheikh Zayed bin Sultan Al Nayhan for sustainable development and empowerment of the UAE and humankind. Emirates Steel is acknowledged for kindly providing EAF slag samples.
Publisher Copyright:
© 2020 American Institute of Physics Inc.. All rights reserved.
PY - 2020/12/11
Y1 - 2020/12/11
N2 - This paper presents an innovative approach of utilizing electric arc furnace (EAF) slags in value-added applications, particularly as storage media for high-temperature thermal energy storage (TES) systems, applied to next-generation of central receiver concentrated solar power (CSP) plants. EAF slag is a solid industrial waste produced in large quantities in metallurgy worldwide and commonly sent to dump sites. Due to steel slag’s chemical composition of metal and non-metal oxides, advanced ceramic bodies can be prepared using thermally treated EAF slag powder. The crystallographic stability of oxidized EAF slag powder was confirmed by XRD analysis that revealed the absence of any crystal phase transformation at elevated temperatures up to 1200 ÛC. Advanced ceramic entirely recycled from locally UAE produced EAF slag was prepared following the method of cold compaction of ceramic powder. For sensible heat TES materials, a high density is desired to maximize the storage capacity. Therefore, the final product bulk density was examined by studying the influence of parameters such as (i) the applied compaction pressure, (ii) the firing temperature, (iii) the binder weight percentage, and (iv) the firing time. Findings showed that a compaction pressure of 186 MPa resulted in relatively dense green ceramic bodies. The firing of these bodies at 1200 ÛC with a dwell time of 3 hours resulted in ceramic products with a bulk density in the range of 2500 kg/m3 that could be potentially used as TES media.
AB - This paper presents an innovative approach of utilizing electric arc furnace (EAF) slags in value-added applications, particularly as storage media for high-temperature thermal energy storage (TES) systems, applied to next-generation of central receiver concentrated solar power (CSP) plants. EAF slag is a solid industrial waste produced in large quantities in metallurgy worldwide and commonly sent to dump sites. Due to steel slag’s chemical composition of metal and non-metal oxides, advanced ceramic bodies can be prepared using thermally treated EAF slag powder. The crystallographic stability of oxidized EAF slag powder was confirmed by XRD analysis that revealed the absence of any crystal phase transformation at elevated temperatures up to 1200 ÛC. Advanced ceramic entirely recycled from locally UAE produced EAF slag was prepared following the method of cold compaction of ceramic powder. For sensible heat TES materials, a high density is desired to maximize the storage capacity. Therefore, the final product bulk density was examined by studying the influence of parameters such as (i) the applied compaction pressure, (ii) the firing temperature, (iii) the binder weight percentage, and (iv) the firing time. Findings showed that a compaction pressure of 186 MPa resulted in relatively dense green ceramic bodies. The firing of these bodies at 1200 ÛC with a dwell time of 3 hours resulted in ceramic products with a bulk density in the range of 2500 kg/m3 that could be potentially used as TES media.
UR - http://www.scopus.com/inward/record.url?scp=85098057429&partnerID=8YFLogxK
U2 - 10.1063/5.0028940
DO - 10.1063/5.0028940
M3 - Conference contribution
AN - SCOPUS:85098057429
T3 - AIP Conference Proceedings
BT - SOLARPACES 2019
A2 - Richter, Christoph
T2 - 2019 International Conference on Concentrating Solar Power and Chemical Energy Systems, SolarPACES 2019
Y2 - 1 October 2019 through 4 October 2019
ER -
