APPARATUS AND METHOD FOR GENERATING NITROGEN OXIDES
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United States of America Patent
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Issued Date -
Jul 24, 2008
app pub date -
Dec 31, 2007
filing date -
Dec 29, 2006
priority date (Note) -
Abandoned
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Abstract
A combustion analyzer apparatus and method for combustion analysing a sample, the analyzer comprising a combustion chamber (82) for receiving a sample for combustion therein to form combustion products, and a fluid supply apparatus for supplying fluid(s) into the chamber. The fluid supply apparatus (130-140) comprises a nitrogen oxides (NO.sub.x) generating apparatus (140,190,210,240) and is arranged to supply NO.sub.x into the combustion chamber. A yield of sulphur dioxide in the combustion products may thereby be improved. The NO.sub.x generating apparatus may be operated at a raised working temperature. The NO.sub.x generating apparatus may be provided by an ozonator with a supply of nitrogen and oxygen. A Venturi tube arrangement (246) may draw the generated NO.sub.x into a (carrier or oxygen) gas line to the combustion chamber. Ozone may be supplied to the combustion products to convert nitrogen monoxide therein to nitrogen dioxide. The NO.sub.x and ozone may be supplied by a single device (210,240).
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