Influence of mineral content on the emissivity of hydrothermal char
- The influence of minerals on solid fuel conversion is an important topic and has so far been addressed focusing mainly on the catalytic effects. Here, the impact of iron oxide on the emissivity of burning char particles was investigated. Synthetic, hydrothermally carbonized char was doped with SiO\(_2\) or with a mixture of SiO\(_2\) and Fe\(_2\)O\(_3\). The sample was then exposed to an oxy‐fuel atmosphere in a laboratory reactor. An established pyrometer/infrared (IR) spectrometer setup was used to measure the size, temperature, and IR radiation of single burning particles. Based on these measurements, the spectral and total emissivity in the near‐IR (1.25–2.25 \(\mu\)m) and the total emissivity in the mid‐IR region (2.4–5.5 \(\mu\)m) were calculated. The results show that the iron content directly influences the emissivity of char during combustion.
| Author: | Philipp GraeserORCiDGND, Lukas PörtnerGND, Martin SchiemannGND |
|---|---|
| URN: | urn:nbn:de:hbz:294-79905 |
| DOI: | https://doi.org/10.1002/ceat.201900623 |
| Parent Title (English): | Chemical engineering & technology |
| Publisher: | Wiley |
| Place of publication: | Weinheim |
| Document Type: | Article |
| Language: | English |
| Date of Publication (online): | 2021/03/26 |
| Date of first Publication: | 2020/02/25 |
| Publishing Institution: | Ruhr-Universität Bochum, Universitätsbibliothek |
| Tag: | Char emissivity; Heat transfer; Oxy‐fuel systems; Pulverized fuels; Thermal radiation |
| Volume: | 43 |
| Issue: | 5 |
| First Page: | 1016 |
| Last Page: | 1020 |
| Note: | Dieser Beitrag ist auf Grund des DEAL-Wiley-Vertrages frei zugänglich. |
| Institutes/Facilities: | Institut für Energietechnik, Energieanlagen und Energieprozesstechnik |
| Dewey Decimal Classification: | Technik, Medizin, angewandte Wissenschaften / Ingenieurwissenschaften, Maschinenbau |
| open_access (DINI-Set): | open_access |
| faculties: | Fakultät für Maschinenbau |
| Licence (English): |  Creative Commons - CC BY 4.0 - Attribution 4.0 International |
