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Title: Multi-component removal in flue gas by aqua ammonia

Abstract

A new method for the removal of environmental compounds from gaseous streams, in particular, flue gas streams. The new method involves first oxidizing some or all of the acid anhydrides contained in the gas stream such as sulfur dioxide (SO.sub.2) and nitric oxide (NO) and nitrous oxide (N.sub.2O) to sulfur trioxide (SO.sub.3) and nitrogen dioxide (NO.sub.2). The gas stream is subsequently treated with aqua ammonia or ammonium hydroxide which captures the compounds via chemical absorption through acid-base or neutralization reactions. The products of the reactions can be collected as slurries, dewatered, and dried for use as fertilizers, or once the slurries have been dewatered, used directly as fertilizers. The ammonium hydroxide can be regenerated and recycled for use via thermal decomposition of ammonium bicarbonate, one of the products formed. There are alternative embodiments which entail stoichiometric scrubbing of nitrogen oxides and sulfur oxides with subsequent separate scrubbing of carbon dioxide.

Inventors:
;
Publication Date:
Research Org.:
United States Department of Energy, Washington, DC (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
912994
Patent Number(s):
7,255,842
Application Number:
10/664,950
Assignee:
United States of America Department of Energy (Washington, DC)
Resource Type:
Patent
Resource Relation:
Patent File Date: 2003 Sep 22
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

Yeh, James T., and Pennline, Henry W. Multi-component removal in flue gas by aqua ammonia. United States: N. p., 2007. Web.
Yeh, James T., & Pennline, Henry W. Multi-component removal in flue gas by aqua ammonia. United States.
Yeh, James T., and Pennline, Henry W. Tue . "Multi-component removal in flue gas by aqua ammonia". United States. https://www.osti.gov/servlets/purl/912994.
@article{osti_912994,
title = {Multi-component removal in flue gas by aqua ammonia},
author = {Yeh, James T. and Pennline, Henry W.},
abstractNote = {A new method for the removal of environmental compounds from gaseous streams, in particular, flue gas streams. The new method involves first oxidizing some or all of the acid anhydrides contained in the gas stream such as sulfur dioxide (SO.sub.2) and nitric oxide (NO) and nitrous oxide (N.sub.2O) to sulfur trioxide (SO.sub.3) and nitrogen dioxide (NO.sub.2). The gas stream is subsequently treated with aqua ammonia or ammonium hydroxide which captures the compounds via chemical absorption through acid-base or neutralization reactions. The products of the reactions can be collected as slurries, dewatered, and dried for use as fertilizers, or once the slurries have been dewatered, used directly as fertilizers. The ammonium hydroxide can be regenerated and recycled for use via thermal decomposition of ammonium bicarbonate, one of the products formed. There are alternative embodiments which entail stoichiometric scrubbing of nitrogen oxides and sulfur oxides with subsequent separate scrubbing of carbon dioxide.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2007},
month = {8}
}

Patent:

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