Aluminas in Air Pollution Control
| Autor: | J. F. Murphy |
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| Rok vydání: | 2016 |
| Předmět: | |
| Zdroj: | Essential Readings in Light Metals ISBN: 9783319485744 Essential Readings in Light Metals: Alumina and Bauxite, Volume 1 |
| DOI: | 10.1007/978-3-319-48176-0_150 |
| Popis: | Alumina and alumina based sorbents, catalysts, and catalyst supports are used in many air pollution control applications because of high surface area, porosity and thermal stability. Although some air pollution abatement may use once-through sorbents, problems of solid waste make regeneration attractive, especially where high volume pollutants like SO2 can be converted to storable sulfur. “Alkalized alumina” as a regenerable SO2 sortent has been tested extensively with some recent reports indicating possible effectiveness on NOX as well. High area alumina is used as support for catalytic materials in conversion of SO2 to H2SO4, while special aluminas provide the best catalyst for the Claus process for conversion of H2S and SO2 to sulfur. The wide range of available alumina properties of value in air pollution abatement in smelters, power plants and chemical processing are illustrated by discussing (a) dry sorption of SO2 by alkalized alumina, (b) absorption of SO2 in slurries of basic aluminum sulfate, (c) catalytic conversion of SO2 to H2SO4, (d) catalytic conversion of SO2/H2S to elemental sulfur in the Claus process. |
| Databáze: | OpenAIRE |
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