Modified fly ash adsorbent for flue gas demercuration and preparation method thereof

Abstract

The invention provides a modified fly ash adsorbent for flue gas demercuration. The modified fly ash adsorbent comprises copper chloride, ferric chloride and fly ash in a mass ratio of (1-6): (1-6): 5. The copper-iron-chlorine modified fly ash adsorbent is low in cost, simple and convenient in preparation method and high in mercury removal efficiency. The copper-iron-chlorine modified fly ash adsorbent can remove mercury in flue gas, so that the utilization efficiency of fly ash can be remarkably improved, and the injection cost is reduced.

Description

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AI Technical Summary

Benefits of technology

This patented new catalyst for removing harmful gases (mercaptans) from combustion exhaust fumes contains cuprous iron hydroxides together with other metals like zinc, cobalt, manganese, etc., along with oxygen containing halogen atoms such as fluorous acid. These metal compounds enhance the activity towards reducing nitrogen dioxide emissions by converting them into carbon monoxide and water vapor. By adding these components during manufacture, the resulting modified flyash material becomes more effective than existing materials due to its unique chemical structures. Additionally, the addition of different types of redozole helps activated sulfuric acids efficiently convert Hg0 molecules onto their surfaces without forming insoluble salts. Overall, this new catalysis system provides technical benefits including efficient reduction of pollutants released through various methods, reduced costs associated with production processes, increased usability of fly Ashes used in emission control systems, and promoting use of injected technologies.

Problems solved by technology

This technical problem addressed in this patented text relates to reducing environmental concerns caused by combustion emissions such as nitrogen dioxide ("NOX"), sulfur compounds, particulate matter, hydrocarbon gases, heavy metals like selenium or chromium, and other substances released during operation. Current technologies aimed towards achieving better control over these contaminating elements include regulations set forth under China Code Regulation No. 2004-2003. These regulators require stricter levels of exhaust gas emitted per country than previously acceptable limits while also requiring effective treatment techniques to effectively reduce airborne hazardous materials including ammonia and formaldehydes.

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