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NOx reduction compositions for use in FCC processes

A technology of composition and mixture, applied in the direction of chemical/physical process, physical/chemical process catalyst, metal/metal oxide/metal hydroxide catalyst, etc., can solve problems that have not been paid attention to, and achieve partial or incomplete improvement Effect of burning FCC process

Inactive Publication Date: 2007-08-29
WR GRACE & CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] However, the prior art mentioned above fails to pay attention to make the NO X and gas phase reduction of nitrogen species such as NH 3 , The FCC process with the smallest amount of HCN

Method used

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  • NOx reduction compositions for use in FCC processes
  • NOx reduction compositions for use in FCC processes
  • NOx reduction compositions for use in FCC processes

Examples

Experimental program
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Effect test

preparation example Construction

[0053] While the present invention is not limited to any particular method of preparation, compositions of the present invention are typically prepared by impregnating a microspheroidal particulate base material composition comprising components (i)-(iii) with a source of noble metal. The base material composition may be prepared using any conventional method, see, for example, US Patent Nos. 6,280,607; The carrier is used to prepare the base material composition containing components (i)-(iii).

[0054] In one embodiment of the invention, an aqueous slurry containing an amount of a peptized acidic metal oxide, such as peptized alumina, and an oxygen storage transition metal and / or rare earth metal salt, such as carbon, may be mixed, preferably stirred. salts, nitrates, sulfates, chloride salts, etc. to prepare the base material composition, the amount of peptized acidic metal oxide is sufficient to provide at least 1.0 wt%, preferably at least 25 wt%, most preferably at least...

specific Embodiment approach

[0072] Compositions of the present invention were evaluated in examples using a regenerator test unit (RTU) and model reactions for reduction of NO from FCCU regenerators operating in partial or incomplete combustion mode X And / or the effect of gas phase reduction nitrogen species. RTU is a device specially designed to simulate the operation of FCCU regeneration furnace. In G. Yaluris and A.W. Peters "Studying the Chemistry of the FCCU Regenerator Under Realistic Conditions", Designing Transportation Fuels for a Cleaner Environment, J.G. Reynolds RTUs are described in detail in M.R. Khan, Ed., p. 151, Taylor & Francis, 1999, ISBN: 1-56032-813-4, which description is incorporated herein by reference.

[0073] Determining that the compositions of the present invention reduce gas phase reduced nitrogen species at RTU without converting them to NO X The model response of the capacity is, in the presence of CO and various amounts of O 2 In the presence of NH 3 Reaction on Crack...

Embodiment 1

[0076] A silica-alumina slurry was prepared by adding 30 lbs of SRSII silica-alumina powder to 57 lbs of water heated to 38°C. (SRSII is sold by Grace Davison, a Business Unit of W.R. Grace & Co.-Corm., (Columbia, MD), a silica-alumina powder containing 6% SiO 2 , 94% Al 2 o 3 , with a water content of 33%. ) The slurry was prepared in a steam jacketed stainless steel tank equipped with an electric stirrer. Mix 6 lbs of aqueous hydrochloric acid (35% HCl) and 6.7 lbs of aqueous solution of aluminum ehlorohydrol (22% Al 2 o 3 ) was added to the silica-alumina slurry. The mixture was heated to 55°C, and the mixture was aged at this temperature for 4 hours with continuous stirring. After the aging period, 15.3 pounds of cerium carbonate crystals (obtained from Rhone Poulenc, Inc., 96% CeO 2 , 4% La 2 o 3 , moisture 50%) was added to the tank, and 30 pounds of water was added to the tank to reduce the solids content of the slurry to 20 wt%.

[0077] The mixture was mille...

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Abstract

Processes for preparing a composition comprising (i) an acidic metal oxide containing substantially no zeolite, (ii) an alkali metal, alkaline earth metal, and mixtures thereof, and (iii) an oxygen storage component are disclosed. Preferably, the process comprise forming a single slurry of components (i)-(iii), spray drying and calcining to obtain metal oxide particles comprising components (i)-(iii). Preferably, the slurry comprise a base peptized acidic metal oxide containing slurry wherein the component (ii) is provided in the slurry as a metal of the base. Compositions prepared are impregnated with a noble metal to provide compositions useful to reduce gas phase reduced nitrogen species and NOx in an effluent off gas of a fluid catalytic cracking regenerator.

Description

[0001] The application date is October 21, 2003, the application number is 200380107195.X, and the title of the invention is "Reduced NO used in FCC process X The divisional application of the invention patent application for the composition of ". technical field [0001] The present invention relates to the reduction of NO X Compositions and methods of use thereof for reducing refinery processes, specifically NO in fluid catalytic cracking (fluid catalytic cracking, FCC) processes X Emissions. More specifically, the present invention relates to the reduction of NO X Compositions and methods of their use for reducing the content of vapor phase reduced nitrogen species in FCC regenerator off-gas released from a fluid catalytic cracking unit (FCCU) regenerator operating in partial or incomplete combustion mode. Background technique [0002] Concerns about air pollution from industrial emissions of toxic nitrogen, sulfur and carbon oxides have grown in recent years in the Un...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/63B01J23/10B01J21/12B01J37/00B01J37/04B01D53/86C10G11/05C10G11/18B01J35/10
CPCB01J23/63B01J23/10C10G2300/405B01D53/8628C10G11/182B01J21/12B01J37/0045C10G11/05B01J37/04B01J35/1019B01J35/615B01J37/00B01J23/58
Inventor G·亚卢里斯J·A·鲁德西尔W·苏亚雷斯
Owner WR GRACE & CO
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