Nano-desulfurizing agent for gas, its preparation and use

A desulfurization agent, nanotechnology, applied in the field of preparation of nano desulfurization agent, can solve the problems of non-renewable recycling, high regeneration temperature, high price, etc., and achieve the effect of preventing sintering, reducing regeneration temperature and high desulfurization activity

Inactive Publication Date: 2007-01-17
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the desulfurizer prepared by traditional methods (such as: mechanical mixing method, co-precipitation method, etc.) is used in this temperature range, the activity is low, the accuracy is poor, the sulfur capacity is low, and the regeneration temperature is high. It is used at around 300°C, but it is expensive and cannot be recycled and used only in the fine stripping section.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Weigh 45g aminoacetic acid and dissolve it in 200ml distilled water. After the dissolution is complete, weigh 10g Zn(NO 3 ) 2 ·6H 2 O and 25gFe(NO 3 ) 3 Dissolve in the above solution and stir magnetically. After adjusting the pH value to 7 with ammonia water, stir for 0.5 hours to stabilize, then raise the temperature to 60°C and heat and stir for 5 hours to obtain the sol. The sol was dried in an oven at 100°C for 14 hours to obtain a gel. When the gel is heated to 200°C, it spontaneously ignites to obtain powder. The powder is then calcined at 300°C for 5 hours to obtain a powdery desulfurizer. Add 5wt% hexanediol to the powdery desulfurizer, stir evenly, extrude into strips, then calcinate in a muffle furnace at 300°C for 4 hours, cool, crush and sieve to obtain the desulfurizer. Take 1g of this desulfurizer and place it in a reaction tube (Φ14mm), control the reaction temperature at 350°C, normal pressure, and space velocity 1000h -1 , Intake composition: 6...

Embodiment 2

[0024] Weigh 50g of citric acid and dissolve it in 200ml of distilled water. After the dissolution is complete, weigh 15g of Zn(NO 3 ) 2 ·6H 2 O and 20gFe(NO 3 ) 3 Dissolve in the above solution and stir magnetically. After adjusting the pH value to 9 with ammonia water, stir for 1 hour to stabilize, then raise the temperature to 70° C. and heat and stir for 4 hours to obtain the sol. The sol was dried in an oven at 120°C for 12 hours to obtain a gel. When the gel is heated to 300°C, it spontaneously ignites to obtain powder. The powder is then calcined at 400°C for 4 hours to obtain a powdery desulfurizer. Add 10% hexanediol to the powdery desulfurizer, stir evenly, extrude into strips, then calcinate in a muffle furnace at 400°C for 3 hours, cool, crush and sieve to obtain the desulfurizer. Take 1g of this desulfurizer and place it in a reaction tube (Φ14mm), control the reaction temperature at 350°C, normal pressure, and space velocity 4000h -1 , Intake composition:...

Embodiment 3

[0026] Weigh 55g of urea and dissolve it in 200ml of distilled water. After the dissolution is complete, weigh 30g of Zn(NO 3 ) 2 ·6H 2 O and 20gFe(NO 3 ) 3 Dissolve in the above solution and stir magnetically. After adjusting the pH value to 11 with ammonia water, stir for half an hour to stabilize, then raise the temperature to 80°C and heat and stir for 3 hours to obtain the sol. The sol was dried in an oven at 140°C for 10 hours to obtain a gel. When the gel is heated to 300°C, it spontaneously ignites to obtain powder. The powder is then calcined at 500°C for 3 hours to obtain a powdery desulfurizer. Add 20% hexanediol to the powdery desulfurizer, stir evenly, extrude into strips, then calcinate in a muffle furnace at 500°C for 2 hours, cool, crush and sieve to obtain the desulfurizer. Take 1g of this desulfurizer and place it in a reaction tube (Φ14mm), control the reaction temperature at 350°C, normal pressure, and space velocity 4000h -1 , Intake composition: 6...

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Abstract

A nano-class desulfurizing agent in the form of powder is prepared from zinc oxide (20-50 Wt%) and iron oxide (50-80 Wt%) through preparing sol, preparing gel, self-burning and calcining.

Description

[0001] Field [0002] The invention belongs to a desulfurizer and its preparation method and application, in particular to a desulfurizer for removing H in gas. 2 Preparation and application of S nano desulfurizer. Background technique [0003] Since the 1980s, with the rapid development of my country's economy, coal consumption has increased day by day. The traditional coal-fired power generation technology has gradually highlighted its shortcomings such as low power generation efficiency, low raw material utilization rate and serious environmental pollution. Therefore, it is imperative to develop a more advanced power generation system. [0004] The newly developed coal-based synthetic chemicals, integrated gasification combined cycle power generation (IGCC) and fuel cell technology (FC) polygeneration technologies are considered to be the most promising in the 21st century due to their high efficiency and good environmental benefits. Prospects for coal utilization. The ...

Claims

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Application Information

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IPC IPC(8): B01D53/52C10K1/20
Inventor 黄戒介张荣俊赵建涛王洋
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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