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Low-temperature ultra-fine desulfurizing agent and preparation method thereof

A technology of fine desulfurization and desulfurization agent, applied in the field of low temperature ultrafine desulfurization agent and its preparation, and ultrafine desulfurization agent, can solve problems such as easy poisoning and deactivation, and achieve the effects of improving impregnation rate, simple production process and increasing load.

Inactive Publication Date: 2017-08-29
SOUTHWEST RES & DESIGN INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Nickel-based catalysts are widely used in industrial synthetic natural gas, which are very sensitive to poisons and are easily deactivated by poisoning

Method used

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  • Low-temperature ultra-fine desulfurizing agent and preparation method thereof
  • Low-temperature ultra-fine desulfurizing agent and preparation method thereof
  • Low-temperature ultra-fine desulfurizing agent and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029] 96g γ-Al 2 o 3 with 4gSiO 2 After mixing, put it into a ball mill and mill it for 7 hours, take out the silicon-aluminum mixture, add 12g of distilled water and 3g of graphite into it and mix it evenly. The mixed material was put into a tablet machine for tablet molding, and the shaped precursor was put into a muffle furnace for calcination at 1100° C. for 3 h.

[0030] Take 60g of the carrier and soak it in 100mL of nitric acid with a concentration of 0.5mol / L for 3h. The soaked carrier was dried at 120°C for 2 h in a forced air drying oven. Mix 112g of copper nitrate trihydrate, 68g of zinc nitrate hexahydrate, 39g of manganese nitrate solution (50% by mass fraction) and 150ml of water into a beaker, and fully dissolve at 70°C. The acid-leached support is then added to the impregnation solution. Place the beaker in an ultrasonic generator for ultrasonic impregnation, the ultrasonic power is 200W, the temperature is controlled at 70°C, and the impregnation is 30mi...

Embodiment 2

[0032] 97g γ-Al 2 o 3 with 3gSiO 2 After mixing, put it into a ball mill and mill it for 8 hours, take out the silicon-aluminum mixture, add 13g of distilled water and 4g of graphite into it, and mix them evenly. The mixed material was put into a tablet machine for tablet molding, and the shaped precursor was put into a muffle furnace for calcination at 1000° C. for 5 h.

[0033] Take 60g of the carrier and soak it in 100mL of nitric acid with a concentration of 0.8mol / L for 3h. The soaked carrier was dried at 120°C for 2 h in a forced air drying oven. Mix 130g of copper nitrate trihydrate, 88g of zinc nitrate hexahydrate, 64g of manganese nitrate solution (50% by mass fraction) and 150ml of water into a beaker, and fully dissolve at 70°C. The acid-leached support is then added to the impregnation solution. The beaker was placed in an ultrasonic generator for ultrasonic impregnation, the ultrasonic power was 250W, the temperature was controlled at 65°C, and the impregnati...

Embodiment 3

[0035] 97g γ-Al 2 o 3 with 3gSiO 2 After mixing, it was put into a ball mill for ball milling for 8 hours, and the silicon-aluminum mixture was taken out, and 14 g of distilled water and 3 g of graphite were added thereto and further mixed evenly. The mixed material was put into a tablet machine for tablet molding, and the shaped precursor was put into a muffle furnace for calcination at 1050° C. for 4 h.

[0036] Take 60g of the carrier and soak it in 100mL of nitric acid with a concentration of 0.4mol / L for 3h. The soaked carrier was dried at 120°C for 2 h in a forced air drying oven. Mix 84g of copper nitrate trihydrate, 82g of zinc nitrate hexahydrate, 60g of manganese nitrate solution (50% by mass fraction) and 150ml of water into a beaker, and fully dissolve at 70°C. The acid-leached support is then added to the impregnation solution. The beaker was placed in an ultrasonic generator for ultrasonic impregnation, the ultrasonic power was 360W, the temperature was cont...

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Abstract

The invention provides a low-temperature ultra-fine desulfurizing agent, and belongs to the technical field of desulfurizing agents. The desulfurizing agent comprises 50-90 parts by mass of a carrier, and 10-50 parts by mass of an active component, wherein the carrier is a porous composite comprising aluminum oxide and silicon oxide; the active component comprises one or a plurality of copper oxide, manganese oxide and zinc oxide. The desulfurizing agent is prepared by ultrasonically soaking the carrier in a saline solution of the active component after the carrier is treated by soaking and pickling through acid liquid and drying, and then drying and decomposing at high temperature. According to the low-temperature ultra-fine desulfurizing agent, the silicon-aluminum composite carrier is low in manufacturing cost, easy to form, high in stability, high in resistance to acid corrosion, developed in pore channel structure, and high in one-time soaking rate; the carrier is pickled, so that the specific surface area of the carrier can be further increased, and as a result, the dispersing performance of the active component on the carrier can be improved, the quantity of the active component loaded on the carrier is increased, and the desulfurizing effect of the desulfurizing agent is effectively improved.

Description

technical field [0001] The invention belongs to the technical field of desulfurizers, in particular to an ultrafine desulfurizer suitable for removing trace amounts of sulfur in industrial raw material gases such as coke oven gas, natural gas, and petroleum processing gas, specifically a low-temperature ultrafine desulfurizer and its preparation method. Background technique [0002] With the rapid development of my country's industry, the demand for clean energy is also increasing, and the coal-based syngas methanation process has been more and more widely used. In order to prolong the life of the methanation catalyst, the desulfurization capacity of the desulfurizer must be further improved , it is generally required that the desulfurization accuracy should reach 20×10 -9 class. [0003] Nickel-based catalysts are widely used in industrial synthetic natural gas, which are very sensitive to poisons and are easily deactivated by poisoning. As the main raw material gas for s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/48C10K1/00C10L3/10
CPCB01D53/48B01D53/485B01D2251/602B01D2257/306C10K1/004C10L3/103
Inventor 胡方谭建冬梁立郭雄陈俊生马昌宁
Owner SOUTHWEST RES & DESIGN INST OF CHEM IND
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