초록 ▼

Oxides of nitrogen (NOx) emissions from an FCC regenerator are reduced by adding a DeNOx catalyst to the FCC regenerator in a form whereby the DeNOx catalyst remains segregated within the FCC regenerator. This permits use of a DeNOx catalyst without regard to the effect of the DeNOx catalyst on the

Oxides of nitrogen (NOx) emissions from an FCC regenerator are reduced by adding a DeNOx catalyst to the FCC regenerator in a form whereby the DeNOx catalyst remains segregated within the FCC regenerator. This permits use of a DeNOx catalyst without regard to the effect of the DeNOx catalyst on the catalytic cracking reaction. Floating hollow spheres, or catalyst fines, containing the DeNOx catalyst are preferred.

대표청구항 ▼

In a process for the catalytic cracking of a nitrogen-containing hydrocarbon feed to lighter products by contacting said feed with a supply of hot, regenerated cracking catalyst in a fluidized catalytic cracking (FCC) reactor means to produce cracked products and spent cracking catalyst containing n

In a process for the catalytic cracking of a nitrogen-containing hydrocarbon feed to lighter products by contacting said feed with a supply of hot, regenerated cracking catalyst in a fluidized catalytic cracking (FCC) reactor means to produce cracked products and spent cracking catalyst containing nitrogen compounds, wherein said spent cracking catalyst is regenerated in a catalyst regeneration means by contact with oxygen or an oxygen-containing gas at catalyst regeneration conditions to produce hot regenerated cracking catalyst and regenerator flue gas containing nitrogen oxides (NOx), the improvement comprising reducing the amount of NOx in said flue gas by adding to the catalyst regeneration means a catalytically effective amount of a DeNOx catalyst in an amount sufficient to reduce the NOx content of said flue gas and in a form whereby said DeNOx catalyst has an extended residence time in said regenerator relative to said cracking catalyst.