Kinetic aspects on ferric arsenate formation in a fix bed gas-solid reaction system
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| Format: | Artículo científico |
| Language: | en |
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Universidad Nacional de Colombia
2015
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| _version_ | 1876450856049573888 |
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| author | Eduardo Balladares |
| author_facet | Eduardo Balladares |
| contents | Kinetic aspects on ferric arsenate formation in a fix bed gas-solid reaction system Eduardo Balladares Roberto Parra Mario Sánchez Ingeniería flue dust gas treatment copper smelting Arsenic fixation The fixation of arsenic contained in gases produced during pyro metallurgical processes by using solid ferric oxide was studied in the range 8731073 K under different oxygen potential and solid agg regates porosities. Arsenic fixation on solid iron oxides is de scribed by the pore blocking model under the studied conditions. The solid product of the reaction has a molar volume 3 times larger than the solid reactant causing fast decreasing of the intergranular spacing. The activation energies of arsenic fixation reaction are 34.96 and 35.46 kJ/mol for porosities of 0.88 and 0.74 respectively, and for po rosity of 0.55 the activation energy was 26.88 kJ/mol. These va lues of activation energy show that intrapellets diffusion has an effect only in samples with 0.55 porosity. Minor sintering of parti cles was detected. Industrial application of the concept demands a react ion system, which in is required better gassolid contact for a ttaining larger conversions. 2015 artículo científico 0012-7353 https://www.redalyc.org/articulo.oa?id=49635366012 en http://www.redalyc.org/revista.oa?id=496 Dyna application/pdf Universidad Nacional de Colombia Dyna (Colombia) Num.189 Vol.82 |
| format | Artículo científico |
| id | redalyc_49635366012 |
| institution | Redalyc |
| language | en |
| publishDate | 2015 |
| publisher | Universidad Nacional de Colombia |
| spellingShingle | Kinetic aspects on ferric arsenate formation in a fix bed gas-solid reaction system Eduardo Balladares Ingeniería flue dust gas treatment copper smelting Arsenic fixation Kinetic aspects on ferric arsenate formation in a fix bed gas-solid reaction system Eduardo Balladares Roberto Parra Mario Sánchez Ingeniería flue dust gas treatment copper smelting Arsenic fixation The fixation of arsenic contained in gases produced during pyro metallurgical processes by using solid ferric oxide was studied in the range 8731073 K under different oxygen potential and solid agg regates porosities. Arsenic fixation on solid iron oxides is de scribed by the pore blocking model under the studied conditions. The solid product of the reaction has a molar volume 3 times larger than the solid reactant causing fast decreasing of the intergranular spacing. The activation energies of arsenic fixation reaction are 34.96 and 35.46 kJ/mol for porosities of 0.88 and 0.74 respectively, and for po rosity of 0.55 the activation energy was 26.88 kJ/mol. These va lues of activation energy show that intrapellets diffusion has an effect only in samples with 0.55 porosity. Minor sintering of parti cles was detected. Industrial application of the concept demands a react ion system, which in is required better gassolid contact for a ttaining larger conversions. 2015 artículo científico 0012-7353 https://www.redalyc.org/articulo.oa?id=49635366012 en http://www.redalyc.org/revista.oa?id=496 Dyna application/pdf Universidad Nacional de Colombia Dyna (Colombia) Num.189 Vol.82 |
| title | Kinetic aspects on ferric arsenate formation in a fix bed gas-solid reaction system |
| topic | Ingeniería flue dust gas treatment copper smelting Arsenic fixation |
| url | https://www.redalyc.org/articulo.oa?id=49635366012 |