Reducing NO sub x emissions with zinc catalyst

Patent · Tue Mar 26 04:00:00 EST 1991

OSTI ID:5077025

Chin, A A

This patent describes improvement in a process for the catalytic cracking of a heavy hydrocarbon feed containing nitrogen compounds by contact with a circulating inventory of catalytic cracking catalyst to produce catalytically cracked products and spent catalyst containing 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 which is recycled to catalytically crack the heavy feed and the catalyst regeneration zone produces a flue gas comprising CO{sub 2} and oxides of nitrogen, NO{sub x}. The improvement comprises reducing the NO{sub x} content of the flue gas by adding to the circulating catalyst inventory an NO{sub x} reduction catalyst comprising zinc in an amount sufficient to reduce the production of NO{sub x} relative to operation without the NO{sub x} reduction catalyst.

• Assignee: Mobil Oil Corp., Fairfax, VA (USA)
• Patent Number(s): A; US 5002654
• Application Number: PPN: US 7-458000
• OSTI ID: 5077025
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400 -- Petroleum-- Processing
54 ENVIRONMENTAL SCIENCES
540120* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
AIR POLLUTION CONTROL
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CATALYTIC CONVERTERS
CATALYTIC CRACKING
CHALCOGENIDES
CHEMICAL REACTIONS
COKE
CONTROL
CRACKING
DECOMPOSITION
ELEMENTS
EQUIPMENT
FLUE GAS
GASEOUS WASTES
HYDROCARBONS
METALS
NITROGEN COMPOUNDS
NITROGEN OXIDES
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
POLLUTION CONTROL EQUIPMENT
PYROLYSIS
THERMOCHEMICAL PROCESSES
VISCOSITY
WASTES
ZINC