Nano-desulfurizing agent for gas, its preparation and use

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 ...

Examples

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...

[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 ...

Examples

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...