Preparationn method for high-activity flue gas desulfurization catalyst

A desulfurization catalyst, a high-activity technology, applied in chemical instruments and methods, physical/chemical process catalysts, separation methods, etc., can solve the problems of uniform dispersion of unfavorable active components, improved activity, etc. Effect

Active Publication Date: 2016-06-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the interaction between different active components of the catalyst prepared by this method forms a new compound, which is not conducive to the uniform dispersion of the active components on the carrier and the further improvement of the activity. In addition, the sulfur yield also needs to be improved.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Weigh the pore volume as 0.9ml / g and the specific surface area as 220m 2 Put 100g of γ-phase cylindrical strip-shaped alumina carrier in a beaker, add 120ml xylitol solution with a concentration of 10g / 100ml and soak for 2 hours, filter off the excess solution, transfer the wet material into an autoclave and seal it at 120°C After treatment for 8 hours, the treated material was dried at 120°C for 4 hours, then soaked with 120ml of urea aqueous solution with a concentration of 25g / 100ml for 1.5 hours, filtered off excess solution, and the carrier was dried at 110°C for 5 hours. The dried carrier was washed with 150ml MoO 3 The active metal impregnation solution with a concentration of 10g / 100ml (the molybdenum source comes from ammonium molybdate) and a NiO concentration of 1.5g / 100ml (the nickel source comes from nickel chloride) impregnates the above-mentioned alumina carrier for 4 hours, and the excess solution is filtered off, and the wet material is Transfer to an ...

Embodiment 2

[0028] With embodiment 1, only the concentration of urea is 30g / 100ml, and xylitol is changed into sorbitol, and the concentration of sorbitol is 5g / 100ml, and the hydrothermal treatment temperature is 130 ℃ for the first time, and the treatment time is 10 hours, the second time The hydrothermal treatment temperature is 220° C., and the treatment time is 6 hours. MoO in active metal impregnation solution 3 The concentration is 12g / 100ml (the molybdenum source comes from ammonium molybdate), the NiO concentration is 1.8g / 100ml (the nickel source comes from nickel chloride), and the catalyst A2 is prepared.

Embodiment 3

[0030] Same as Example 1, except that the concentration of urea is 20g / 100ml, xylitol is changed to glucose, the concentration of glucose is 20g / 100ml, the first hydrothermal treatment temperature is 110°C, and the treatment time is 12 hours, the second hydrothermal treatment The temperature was 200°C, and the treatment time was 10 hours. MoO in active metal impregnation solution 3 The concentration is 8g / 100ml (the molybdenum source comes from ammonium molybdate), the NiO concentration is 1.2g / 100ml (the nickel source comes from nickel chloride), and the catalyst A3 is prepared.

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PUM

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Abstract

The invention discloses a preparation method for a high-activity flue gas desulfurization catalyst. The method comprises the following steps: (1) impregnating a porous inorganic refractory oxide carrier into an aqueous solution containing polyol and / or monosaccharide, transferring an impregnated material into a sealed container for hydrothermal treatment, and carrying out drying; (2) impregnating the porous inorganic refractory oxide carrier into a urea aqueous solution, and subjecting the carrier to drying treatment for subsequent usage; (3) impregnating the porous inorganic refractory oxide carrier obtained in the step (2) into an impregnating liquid containing active metal components, transferring the impregnated porous inorganic refractory oxide carrier into the sealed container, and carrying out hydrothermal treatment again; and (4) subjecting the material obtained in the step (3) to drying, and carrying out anaerobic high-temperature treatment so as to obtain the high-activity flue gas desulfurization catalyst. The catalyst prepared by using the method provided by the invention has the following advantages: the active metal components are uniformly distributed, have weak action with the carrier, are easy to be completely sulfurized, and significantly improve desulfurization activity of the catalyst.

Description

technical field [0001] The invention relates to a preparation method of a highly active flue gas desulfurization catalyst. Background technique [0002] SO 2 It is the main air pollutant and the main cause of acid rain, which seriously pollutes the environment and does serious harm to the human body. Coal combustion flue gas emissions are SO 2 main source of . The traditional flue gas desulfurization is wet desulfurization. This method has complex process, high investment cost and secondary pollution. The dry desulfurization process is simple, but the desulfurization rate is low. Catalytic desulfurization greatly improves the efficiency of dry desulfurization. [0003] SO in flue gas 2 Catalytic reduction technology is currently an advanced flue gas desulfurization technology in the world. It can be applied to the desulfurization of flue gas from coal-fired or oil-fired boilers. It has the advantages of low operating costs and the use of by-products (sulfur) as products....

Claims

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Application Information

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IPC IPC(8): B01J23/883B01D53/50B01D53/90
Inventor 佟智丰刘淑鹤王学海陈玉香
Owner CHINA PETROLEUM & CHEM CORP
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