January 2021

Special Focus: Sustainability

FCC NOx reduction methods: Complying with regulations without capital investment

As fluid catalytic cracking (FCC) nitrogen oxides (NOx) emissions regulations become increasingly strict, refiners are driven to find the most economic compliance option.

Hobbins, P., Placid Refining Co.; Blair, H., Hochheiser, T., Johnson Matthey

As fluid catalytic cracking (FCC) nitrogen oxides (NOx) emissions regulations become increasingly strict, refiners are driven to find the most economic compliance option. Multiple capital and non-capital project options are available to mitigate NOx emissions. Selective catalytic reduction, selective non-catalytic reduction, a proprietary NOx removal technologya and regenerator hardware modifications are discussed in this article for capital project opportunities. A carbon monoxide (CO) promoter, optimization of oxygen (O2) and CO, feed nitrogen reduction, flue gas ammonia injection and NOx additives are also covered for non-capital project options. These solutions are discussed, including t

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