Data · dataset · 2025
High resistance SO2 adsorbent of Fe-Ce-La oxides @ Si-Al carrier for arsenic capture from middle-low-temperature flue gas
Listed in ScienceDB
It is crucial to develop arsenic removal adsorbents with strong sulfur resistance under middle-low-temperature flue gas conditions (<400 ℃).
Description
In this paper, five Fe-Ce-La oxides were prepared by co-precipitation method and FeCeLaO/SiO2-Al2O3 composite adsorbents were prepared by coupling fly ash-based Si-Al carriers. The active components Fe-Ce-La oxides and Si-Al carriers were characterized by TPD, TG, XRF, BET, and XPS, respectively.
The effects of temperature, Si/Al ratio, and FeCeLaO loading rate on the sulfur resistance were investigated. The results showed that SO2 promoted the arsenic removal of Fe2O3, CeLaO, and FeCeLaO. At 400 ℃, the arsenic removal efficiency of the three increased from 45.3 %, 72.5 % and 81.3 % without SO2 to 62.6 %, 80.5 % and 91.0 %, respectively.
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SO2 inhibits the arsenic removal of La2O2CO3 and FeLaO, and the higher the temperature, the stronger the inhibition. The sulfur poisoning resistance of Si-Al carriers increased with the increase of Si/Al ratio. When the Si/Al ratio increases to 9.74, the arsenic removal efficiency in the SO2 environment is 13.9 % higher than in the absence of SO2.
Introducing FeCeLaO active components is beneficial for enhancing the SO2 poisoning resistance of Si-Al carriers. The strong sulfur resistance of the FeCeLaO/SiO2-Al2O3 composite adsorbent results from multiple factors: protective effects of Ce on Fe, La, and Al; sulfation-induced generation of Ce3+ and surface-adsorbed oxygen; and strong surface acidity of SiO2.
Links
Where it is published
- DOI doi.org/10.57760/sciencedb.j00124.00250 ↗
DOI / persistent id · from scidb cn
Catalogue records · 1
- OAI-PMH record scidb.cn/oai?verb=GetRecord&metadataPrefix=oai_dc&identifier=10.57760%2… ↗
metadata API · from scidb cn
Topics
- From keywords
- Earth & Environmental Science · Engineering · Humanities · Life Sciences · Social Science
Provenance · 1 source records, 10 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| ScienceDB | 10.57760/sciencedb.j00124.00250 | 11 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · scidb cn | connector:scidb_cn@1.0.0 | |
| concepts[field].local:field:earth-environmental | mapping · scidb cn | connector:scidb_cn@1.0.0 | |
| concepts[field].local:field:engineering | mapping · scidb cn | connector:scidb_cn@1.0.0 | |
| concepts[field].local:field:humanities | mapping · scidb cn | connector:scidb_cn@1.0.0 | |
| concepts[field].local:field:life-sciences | mapping · scidb cn | connector:scidb_cn@1.0.0 | |
| concepts[field].local:field:social-science | mapping · scidb cn | connector:scidb_cn@1.0.0 | |
| description | source · scidb cn | connector:scidb_cn@1.0.0 | /metadata/dc/description |
| license | source · scidb cn | connector:scidb_cn@1.0.0 | /metadata/dc/rights |
| publication_date | source · scidb cn | connector:scidb_cn@1.0.0 | |
| title | source · scidb cn | connector:scidb_cn@1.0.0 | /metadata/dc/title |