Preparation of high temperature gas desulfurizer

Abstract

The invention discloses a method for preparing a high-temperature coal gas desulfurizer, which belongs to the field of preparation of desulfurizer. The method comprises the following steps that: four pore-forming agents with different pore-forming characteristics are prepared, mixed with red mud and burnt earth, ball ground to be below 200 meshes, kneaded by adding water, subjected to extruded molding, and then dried and roasted at high temperature. The specific surface area of the prepared desulfurizer is between 8 and 10m<2> / g, the pore volume is between 0.3 and 0.5cm<3> / g, and pores with dimensions more than 120nm account for 50 percent in the pore distribution. The desulfurizer consists of 80 to 90 weight percent of red mud, 5 to 15 weight percent of adhesive, and 5 to 10 weight percent of pore-forming agent. The desulfurizer prepared by the method has the characteristics of low cost, high sulfur capacity and good stability. The method can be used in the field of high-temperature coal gas purification-key technology of integrated gasification combined cycle power generation and fuel-cell power generation technologies, and the field of desulfurization purification of chemical raw material gas prepared by taking coal, petroleum and natural gas as raw materials.

Description

technical field

[0001] The invention relates to a method for preparing a high-temperature gas desulfurizer, which belongs to the field of desulfurizer preparation, and specifically relates to a high-temperature gas purifier in integrated coal gasification combined cycle power generation and fuel cell power generation technologies and a desulfurizer prepared with coal, oil and natural gas as raw materials The invention discloses a preparation method of a desulfurization purifying agent for chemical raw material gas. Background technique

[0002] Fuel cell power generation (FC) and gas-steam combined cycle power generation (IGCC) technologies are the best ways to use coal cleanly and efficiently. However, coal gasification produces a large amount of sulfide, of which more than 90% is hydrogen sulfide. These sulfur-containing components will not only severely corrode equipment at high temperatures, but also cause serious environmental pollution when discharged into the atmosph...

Examples

Embodiment approach 1

[0015] Embodiment 1: Weigh 800g of red mud and 150g of burnt soil respectively, grind (below 200 mesh), and add 30g of carboxymethyl cellulose, 6g of polyethylene glycol, 4g of ammonium bicarbonate and 10g of starch in advance. After the slurry is completely mixed and kneaded, it is placed for 5 hours, and then molded on a tablet machine to make a sheet-shaped desulfurizer with a diameter of 10 mm and a height of 2 mm. After standing for 12 hours, it is dried in an oven at 110 ° C for 3 hours. , and then calcined at 750° C. for 5 hours in a muffle furnace to obtain a high-temperature gas desulfurizer 1. After activity evaluation, its breakthrough sulfur capacity reaches 22.45%.

Embodiment approach 2

[0016] Embodiment 2: Weigh 800g of red mud and 50g of burnt soil respectively, and after ball milling (below 200 mesh), add 60g of carboxymethyl cellulose, 13g of polyethylene glycol, 17g of ammonium bicarbonate and 60g of starch to reconcile in advance. After fully mixing and kneading, place it for 8 hours, and then shape it on an extruder to make a φ3mm bar-shaped desulfurizer, dry it in a cool place for 3 days, and then put it in a muffle furnace at 800°C Calcined at lower temperature for 5 hours, the high-temperature gas desulfurizer 2 was obtained. After activity evaluation, its breakthrough sulfur capacity reaches 25.73%, and after 10 regeneration cycles, its sulfur capacity reaches 24.62%.

Embodiment approach 3

[0017] Embodiment 3: Weigh 900g of red mud and 50g of burnt soil respectively, ball mill (below 200 mesh), add 26.5g of carboxymethyl cellulose, 6g of polyethylene glycol, 2.5g of ammonium bicarbonate and 15g of starch to reconcile in advance The resulting slurry was completely mixed and then kneaded, placed for 8 hours, and then molded on an extruder to make a φ3 mm strip-shaped desulfurizer, which was naturally air-dried for 3 days in a cool place, and then placed in a muffle furnace at 800 ℃ for 8 hours to obtain the high-temperature gas desulfurizer 3. After activity evaluation, its breakthrough sulfur capacity reaches 26.25%, and after 10 regeneration cycles, its sulfur capacity reaches 24.96%.

[0018]Embodiment 4: Weigh 900g of red mud and 50g of burnt soil respectively, grind (below 200 mesh), and add 26.5g of carboxymethyl cellulose, 6g of polyethylene glycol, 2.5g of ammonium bicarbonate and 15g of starch in advance. The resulting slurry was completely mixed and the...

technical field

[0001] The invention relates to a method for preparing a high-temperature gas desulfurizer, which belongs to the field of desulfurizer preparation, and specifically relates to a high-temperature gas purifier in integrated coal gasification combined cycle power generation and fuel cell power generation technologies and a desulfurizer prepared with coal, oil and natural gas as raw materials The invention discloses a preparation method of a desulfurization purifying agent for chemical raw material gas. Background technique

[0002] Fuel cell power generation (FC) and gas-steam combined cycle power generation (IGCC) technologies are the best ways to use coal cleanly and efficiently. However, coal gasification produces a large amount of sulfide, of which more than 90% is hydrogen sulfide. These sulfur-containing components will not only severely corrode equipment at high temperatures, but also cause serious environmental pollution when discharged into the atmosph...

Examples

Embodiment approach 1

[0015] Embodiment 1: Weigh 800g of red mud and 150g of burnt soil respectively, grind (below 200 mesh), and add 30g of carboxymethyl cellulose, 6g of polyethylene glycol, 4g of ammonium bicarbonate and 10g of starch in advance. After the slurry is completely mixed and kneaded, it is placed for 5 hours, and then molded on a tablet machine to make a sheet-shaped desulfurizer with a diameter of 10 mm and a height of 2 mm. After standing for 12 hours, it is dried in an oven at 110 ° C for 3 hours. , and then calcined at 750° C. for 5 hours in a muffle furnace to obtain a high-temperature gas desulfurizer 1. After activity evaluation, its breakthrough sulfur capacity reaches 22.45%.

Embodiment approach 2

[0016] Embodiment 2: Weigh 800g of red mud and 50g of burnt soil respectively, and after ball milling (below 200 mesh), add 60g of carboxymethyl cellulose, 13g of polyethylene glycol, 17g of ammonium bicarbonate and 60g of starch to reconcile in advance. After fully mixing and kneading, place it for 8 hours, and then shape it on an extruder to make a φ3mm bar-shaped desulfurizer, dry it in a cool place for 3 days, and then put it in a muffle furnace at 800°C Calcined at lower temperature for 5 hours, the high-temperature gas desulfurizer 2 was obtained. After activity evaluation, its breakthrough sulfur capacity reaches 25.73%, and after 10 regeneration cycles, its sulfur capacity reaches 24.62%.

Embodiment approach 3

[0017] Embodiment 3: Weigh 900g of red mud and 50g of burnt soil respectively, ball mill (below 200 mesh), add 26.5g of carboxymethyl cellulose, 6g of polyethylene glycol, 2.5g of ammonium bicarbonate and 15g of starch to reconcile in advance The resulting slurry was completely mixed and then kneaded, placed for 8 hours, and then molded on an extruder to make a φ3 mm strip-shaped desulfurizer, which was naturally air-dried for 3 days in a cool place, and then placed in a muffle furnace at 800 ℃ for 8 hours to obtain the high-temperature gas desulfurizer 3. After activity evaluation, its breakthrough sulfur capacity reaches 26.25%, and after 10 regeneration cycles, its sulfur capacity reaches 24.96%.

[0018]Embodiment 4: Weigh 900g of red mud and 50g of burnt soil respectively, grind (below 200 mesh), and add 26.5g of carboxymethyl cellulose, 6g of polyethylene glycol, 2.5g of ammonium bicarbonate and 15g of starch in advance. The resulting slurry was completely mixed and the...