Patent · US Active

System and method of protecting a NOx reducing catalyst

US7910075B2 · kind B2 · utility

0Cited by

5References

20Claims

0Family size

Assignee

Alstom Technologies Ltd · CH

Inventors

Lawrence Joseph Czarnecki · Knoxville, US
Mikael Larsson · Mölndal, SE

Key dates

Filing date	Jul 22, 2009
Grant date	Mar 22, 2011
Priority date	—
Expiry date	Jul 22, 2029

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02A50/20
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A method of protecting a NOx reducing catalyst 140 from fouling, where the NOx reducing catalyst 140 is downstream of a circulating fluidized bed (CFB) boiler 120 and upstream of a particulate removal device 150. The method includes introducing a SOx removing reagent 212 in a calcium to sulfur molar ratio greater than that required for SO2 removal from a flue gas 122 generated by a CFB 120, thereby preventing SO3 formation and fouling of the NOx reducing catalyst 140.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.