Oxygen Injection for Emission Reduction in Cement Kilns: An Innovative Technology for Managing Nitrous Oxides and Carbon-Monoxide Emissions

Reducing the discharge of carbon monoxide (CO) and nitrous oxides (NOx) from the cement production process is a continual requirement for many cement manufacturers and often involves very expensive end-of-pipe pollution abatement solutions. The injection of highly reactive hot oxygen (O
₂
) is a new approach to lowering emission requirements or complementing underperforming existing solutions. This article discusses an innovative O
₂
lancing technology that cement manufacturers install in the outlet of the kiln or calciner to remove primarily CO from the system.