Biological chemical regeneration of desulphurization sorbents based on zinc ferrite
| Title: | Biological chemical regeneration of desulphurization sorbents based on zinc ferrite |
|---|---|
| Authors: | Šepelák Vladimír, Vašková Helena, Boldižárová Eva, Kušnierová Mária |
| Source: | Acta Montanistica Slovaca, Vol 7, Iss 1, Pp 55-59 (2002) |
| Publisher Information: | Technical University of Kosice, 2002. |
| Publication Year: | 2002 |
| Collection: | LCC:Mining engineering. Metallurgy LCC:Geology |
| Subject Terms: | desulphurization, bioregeneration, Thiobacillus ferrooxidans, zinc ferrite, Mining engineering. Metallurgy, TN1-997, Geology, QE1-996.5 |
| More Details: | One of the main sources of air pollution is the combustion of fuels by various thermal and power plants, transport facilities, and metallurgical plants. Main components of industrial gases that pollute air are carbon oxides, nitrogen oxides, sulphur oxides and hydrogen sulphide. Sulphur has received a more attention than any other contaminant, because the sulphur released into the atmosphere in the form of sulphur dioxide or hydrogen sulphide is a precursor of the acid rain formation. To meet environmental emission regulations, sulphur and other contaminant species released during the gasification of coal must be removed from the fuel gas stream. The removal of contaminat at high temperatures is referred to as hot-gas cleanup in general and hot-gas desulphurization in particular when sulphur species are the primary contaminants to be remove. In recent years, zinc ferrite is the leading candidate for hot-gas desulphurization, capable of removing sulphur-containing species from coal gas at gasifier exit temperatures. It can also be of being regenerated for a continuous use. The conventional methods of the regeneration of sulphurized sorbents are based on oxidizing pyrolysis of sulphides or on the pressure leaching of sulphides in the water environment at high temperatures. The first results of the experiments using the biological-chemical leaching, as a new way of regeneration of sulphurized sorbent based on zinc ferrite, are presented in this paper. The results show that the biological-chemical leaching leads to the removal of sulphides layers (á-ZnS, â-ZnS) from the surface of the sorbent at room temperature. The biological-chemical leaching process results in the increase of the active surface area of the regenerated sorbent. |
| Document Type: | article |
| File Description: | electronic resource |
| Language: | English Slovak |
| ISSN: | 1335-1788 |
| Relation: | http://actamont.tuke.sk/pdf/2002/n1/13kusnierovaetal.pdf; https://doaj.org/toc/1335-1788 |
| Access URL: | https://doaj.org/article/9d7014c0e985495cb4d9fea4047f001d |
| Accession Number: | edsdoj.9d7014c0e985495cb4d9fea4047f001d |
| Database: | Directory of Open Access Journals |
| ISSN: | 13351788 |
|---|---|
| Published in: | Acta Montanistica Slovaca |
| Language: | English Slovak |