Patent · US Active

Combustion flue gas NOx treatment

US8147785B2 · kind B2 · utility

3Cited by
26References
18Claims
0Family size

Assignee

Inventors

Key dates

Filing dateMay 12, 2010
Grant dateApr 3, 2012
Priority date—
Expiry dateMay 12, 2030

Classification

  • Technology area (CPC Y)Emerging Cross-Sectional Technologies
  • CPC primaryY02C20/10
  • WIPO fieldChemical engineering
  • WIPO sectorChemistry

Abstract

Combustion flue gas containing NOX and SOX is treated to remove NOX in a multistep system in which NOX is reduced in the flue gas stream via selective catalytic reduction or selective non-catalytic reduction with ammonia or an ammonia-forming compound, followed treatment with hydrogen peroxide to remove residual ammonia and, optionally, treatment with an alkali reagent to reduce residual NOX in the flue gas stream. The NOX-depleted flue gas stream may also be subjected to a desulfurization treatment for removal of SOX.

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