Destruction of acid gas emissions

Patent · Tue Jan 01 00:00:00 EST 1991

OSTI ID:867844

Mathur, Mahendra P ^[1]; Fu, Yuan C ^[2]; Ekmann, James M ^[1]; Boyle, John M ^[1]

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1. Pittsburgh, PA
2. Muroran, JP

A method of destroying NO.sub.x and SO.sub.2 in a combustion gas in disclosed. The method includes generating active species by treating stable moleucles in a high temperature plasma. Ammonia, methane, steam, hydrogen, nitrogen or a combination of these gases can be selected as the stable molecules. The gases are subjected to plasma conditions sufficient to create free radicals, ions or excited atoms such as N, NH, NH.sub.2, OH.sup.-, CH and/or CH.sub.2. These active species are injected into a combustion gas at a location of sufficiently high temperature to maintain the species in active state and permit them to react with NO.sub.x and SO.sub.2. Typically the injection is made into the immediate post-combustion gases at temperatures of 475.degree.-950.degree. C.

• Research Organization: USDOE Pittsburgh Energy Technology Center (PETC), PA (United States)
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 5020457
• OSTI ID: 867844
• Country of Publication: United States
• Language: English

Related Subjects

destruction
acid
gas
emissions
method
destroying
combustion
disclosed
generating
active
species
treating
stable
moleucles
temperature
plasma
ammonia
methane
steam
hydrogen
nitrogen
combination
gases
selected
molecules
subjected
conditions
sufficient
create
free
radicals
excited
atoms
nh
oh
injected
location
sufficiently
maintain
permit
react
typically
injection
immediate
post-combustion
temperatures
475
degree
-950
free radical
combustion gases
combustion gas
free radicals
acid gas
plasma conditions
conditions sufficient
temperature plasma
active species
gas emissions
/110/423/431/