Catalytic combustion catalyst for benzene waste gas treatment and preparation and application thereof

A catalytic combustion and catalyst technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, combustion methods, etc., can solve the problems of low anti-poisoning ability and poor catalyst stability, and achieve anti-poisoning. The effect of strong performance, excellent activity and long life

Inactive Publication Date: 2015-09-16
NINGBO DADI CHEM ENG & ENVIRONMENTAL PROTECTION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the catalytic combustion of benzene-containing exhaust gas in the prior art has poor stability and low anti-poisoning ability, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Weigh a certain amount of palladium acetylacetonate and ruthenium acetylacetonate, and dissolve them in toluene solution. Add 80 mesh γ-Al at room temperature 2 o 3 The carrier adopts the equal-volume impregnation method (theoretically, equal-volume impregnation refers to: the volume of the impregnating liquid is equal to the pore volume of the catalyst carrier, but usually the impregnating liquid just barely passes through the catalyst when the catalyst is prepared, and the present invention adopts The latter) the load mass fraction is 0.5% of Pd and 0.5% of Ru, (set the amount of Pd and Ru according to the amount of carrier, and further reflect the content of Pd and Ru in the precursor (palladium acetylacetonate and ruthenium acetylacetonate) Push the amount of palladium acetylacetonate and ruthenium acetylacetonate. Impregnated and stirred for 2 h, and transferred to a rotary evaporator to evaporate to dryness, then transferred to a muffle furnace, and roasted at 40...

Embodiment 2

[0030] Pd-Ru / γ-Al 2 o 3 The preparation method of the composite catalyst is the same as in Example 1, except that the added precursors are palladium acetate and ruthenium acetate, the loading of Pd is 0.3%, the loading of Ru is 0.5%, the impregnation stirring time is 4 h, and the roasting temperature at 450°C, and the calcination time was 4 h.

[0031] The activity evaluation method of the catalyst is the same as in Example 1. The results showed that when the reaction temperatures were 202°C, 251°C, 298°C, 353°C, 404°C, 446°C, and 501°C, the conversion rates of toluene were 45.96, 96.32, 99.97, 100, 100, 100, and 100%, respectively. The reaction temperature was above 350°C, and the conversion rate began to drop to 99.3% after 480 hours of use.

Embodiment 3

[0033] Pd-Ru / γ-Al 2 o 3 The preparation method of the composite catalyst is the same as in Example 1, except that the added precursors are palladium acetate and ruthenium acetate, the loading of Pd is 0.4%, the loading of Ru is 0.6%, the impregnation and stirring time is 6 h, and the roasting temperature The temperature is 500°C, and the firing time is 6h.

[0034] The activity evaluation method of the catalyst is the same as in Example 1. The results showed that when the reaction temperatures were 205°C, 254°C, 305°C, 343°C, 398°C, 449°C, and 505°C, the conversions of toluene were 60.06, 97.82, 99.67, 100, 100, 100, and 100%, respectively. The reaction temperature was above 350°C, and after 480 hours of use, the conversion rate began to drop to 99.2%.

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PUM

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Abstract

The present invention discloses a catalytic combustion catalyst for benzene waste gas treatment, the catalytic combustion catalyst is composed of a carrier and an active ingredient supported on the carrier, the catalytic combustion catalyst comprises 0.1-1% of Pd; 0. 1-1% of Ru; and 98-99.8% of gamma-Al2O3; the preparation method of the catalyst is as follows: 1) taking an organic palladium salt and an organic ruthenium salt to dissolve in an organic solvent; 2) adding the gamma-Al2O3 into the resulting solution of step 1), immersing and stirring, and transferring to a rotary evaporator to evaporate to dryness to obtain gamma-Al2O3 loaded with the organic palladium salt and the organic ruthenium salt; and 3) baking the gamma-Al2O3 loaded with the organic palladium salt and the organic ruthenium salt of the step 2) at 400-600 DEG C. The catalyst has a high low-temperature catalytic activity on the catalytic combustion reaction of volatile organic benzene compounds, preparation process is simple, and activity is superior, anti-poisoning performance is stronger, and the life is longer.

Description

technical field [0001] The invention belongs to the technical field of catalytic combustion environmental protection, in particular to a composite metal catalytic combustion catalyst for treating benzene waste gas and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of the electronics industry, machinery industry, automobile, printing, and locomotive manufacturing industries, paints, adhesives, etc. The benzene series organic waste gas directly affects the environment and the health of operators. If these benzene series are directly discharged into the atmosphere, they will cause serious pollution problems. In particular, benzene is highly toxic and has harmful effects on the central nervous system and hematopoietic system. Benzene vapor is inhaled into the lungs through the respiratory tract, quickly enters the blood through the alveolar gas exchange system, and finally reaches the liver where it is oxidized into pheno...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/46F23G7/07
Inventor 郇昌永陈雷陆国杰杨玉彬
Owner NINGBO DADI CHEM ENG & ENVIRONMENTAL PROTECTION
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