Reducing NO sub x emissions with antimony additive

Patent · Tue Jan 29 04:00:00 EST 1991

OSTI ID:5212477

Chin, A A

This paper describes improvement in a process for the catalytic cracking of a heavy hydrocarbon feed containing Ni and nitrogen compounds by contact with a circulating inventory of catalytic cracking catalyst to produce catalytically cracked products and spent catalyst. It comprises: Ni or Ni compounds and coke comprising nitrogen compounds, and wherein the spent catalyst is regenerated by contact with oxygen or an oxygen-containing gas in a catalyst regeneration zone operating at catalyst regeneration conditions to produce hot regenerated catalyst comprising Ni or Ni compounds which is recycled to catalytically crack the heavy feed and the catalyst regeneration zone produces a flue gas comprising CO, CO{sub 2} and oxides of nitrogen, NO{sub x}. The improvement comprises: adding to the circulating catalyst inventory CO combustion promoter in an amount equivalent to 0.01 to 50 wt ppm Pt to reduce the CO content of the flue gas and reducing the NO{sub x} content of the flue gas by adding to the circulating catalyst inventory a separate particle additive comprising antimony. The additive being added in an amount sufficient to reduce the production of NO{sub x} relative to operation without the additive, and wherein the additive comprises a compound of antimony which does not substantially passivate the Ni or Ni compounds present on the cracking catalyst, nor deactivate the CO combustion promoter.

• Assignee: Mobil Oil Corp., Fairfax, VA (USA)
• Patent Number(s): A; US 4988432
• Application Number: PPN: US 7-458052
• OSTI ID: 5212477
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400* -- Petroleum-- Processing
020900 -- Petroleum-- Environmental Aspects
54 ENVIRONMENTAL SCIENCES
540120 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
AIR POLLUTION ABATEMENT
CATALYSTS
CATALYTIC CRACKING
CHALCOGENIDES
CHEMICAL REACTIONS
CRACKING
DECOMPOSITION
ELEMENTS
ENERGY SOURCES
FOSSIL FUELS
FUELS
METALS
NICKEL
NITROGEN COMPOUNDS
NITROGEN OXIDES
OXIDES
OXYGEN COMPOUNDS
PETROLEUM
POLLUTION ABATEMENT
PYROLYSIS
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENTS