CN115106108B - COS hydrolysis catalyst for blast furnace gas and preparation method thereof - Google Patents
COS hydrolysis catalyst for blast furnace gas and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a COS hydrolysis catalyst for blast furnace gas and a preparation method thereof, wherein the COS hydrolysis catalyst for blast furnace gas comprises a carrier, an active component and an additive, wherein the active component and the additive are carried on the carrier; the chemical components of the carrier comprise alumina, titanium oxide, silicon dioxide and magnesium oxide; the chemical components of the active component comprise potassium carbonate and sodium carbonate; the chemical components of the additive comprise nickel carbonate, cobalt carbonate, ammonium molybdate and potassium manganate. The COS hydrolysis catalyst for blast furnace gas is prepared by loading active components and additives on a carrier through an impregnation method. The COS hydrolysis catalyst for blast furnace gas has the characteristics of sulfur resistance, oxygen resistance, sulfation resistance, HCN resistance and other acid gas corrosion resistance, excellent low-temperature activity and the like, has high low-temperature toxicity resistance, high COS hydrolysis conversion rate and slow activity reduction, and is suitable for large-scale devices such as blast furnace gas and the like.
Description
Technical Field
The invention belongs to a gas purification technology, and particularly relates to a COS hydrolysis catalyst for blast furnace gas and a preparation method thereof.
Background
Blast furnace gas can be directly combusted or utilized as chemical raw material gas, but generally contains a large amount of acid gases such as HCl, HCN and the like, COS and H 2 S gas, etc., which corrodes equipment and piping and poisons subsequent catalysts during use, and in addition, blast furnace gas generates a large amount of chlorides, nitrogen oxides, and SO during combustion 2 The subsequent treatment cost is high; in the prior art, before the blast furnace gas is combusted or used as chemical raw material gas, desulfurization and dechlorination and other harmful gases are added, so that the purification cost is reduced, equipment and subsequent catalysts are protected, but the existing blast furnace gas is increasingly emphasized in removing inorganic sulfur and sulfur, the removal of COS organic sulfur is less, and the common COS hydrolyzer can convert COS in the blast furnace gas into H at low temperature 2 S, elemental sulfur is easy to generate to block pore channels under the high-temperature and high-oxygen environment, and meanwhile, serious sulfation and catalyst poisoning are easy to occur, and the common COS hydrolyzer has weak acid poisoning resistance to other acidity such as HCN and the like, is easy to generate acidosis, has quick activity reduction and frequent replacement, and causes high production cost, thus being not suitable for large-scale devices such as blast furnace gas and the like.
In view of the above circumstances, a new COS hydrolysis catalyst for blast furnace gas has been urgently researched, which has the characteristics of sulfur resistance, oxygen resistance, sulfation resistance, acid gas corrosion resistance such as HCN resistance, excellent low-temperature activity and the like, has high low-temperature toxicity resistance, high COS hydrolysis conversion rate and slow activity reduction, and is suitable for large-scale devices such as blast furnace gas and the like.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the COS hydrolysis catalyst for the blast furnace gas and the preparation method thereof, and the COS hydrolysis catalyst for the blast furnace gas prepared by the carrier, the active components and the additive has the characteristics of sulfur resistance, oxygen resistance, sulfation resistance, HCN resistance and other acid gas corrosion resistance, excellent low-temperature activity and the like, has strong low-temperature toxicity resistance, high COS hydrolysis conversion rate and slow activity reduction, and is suitable for large-scale devices such as the blast furnace gas and the like.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the first aspect of the invention provides a COS hydrolysis catalyst for blast furnace gas, comprising a carrier, an active component supported on the carrier, an activity enhancement and an antitoxic additive;
the chemical components of the carrier comprise aluminum oxide, titanium oxide, silicon dioxide and magnesium oxide;
the chemical components of the active component comprise potassium carbonate and sodium carbonate;
the chemical components of the additive comprise nickel carbonate, cobalt carbonate, ammonium molybdate and potassium manganate.
Preferably, in the COS hydrolysis catalyst for blast furnace gas, the carrier accounts for 70-85wt%, the active component accounts for 15-25wt% and the additive accounts for 5-10wt%.
Preferably, the raw materials of the carrier comprise the following components in percentage by mass: 50-80% of quick-release powder, 20-30% of titanium dioxide, 10-20% of kaolin and 0-10% of magnesium oxide; and/or
The active components comprise the following components in percentage by mass: 60-80% of potassium carbonate and 20-40% of sodium carbonate; and/or
The additive comprises the following components in percentage by mass: 50-80% of nickel carbonate, 15-40% of cobalt carbonate, 5-15% of ammonium molybdate and 0-10% of potassium manganate.
Preferably, in the additive, 50-70wt% of nickel carbonate, 15-30wt% of cobalt carbonate, 5-10wt% of ammonium molybdate and 3-7% of potassium manganate are mixed.
A second aspect of the present invention provides a method for preparing a COS hydrolysis catalyst for blast furnace gas according to the first aspect of the present invention, comprising the steps of:
(1) Preparing a carrier: uniformly mixing quick-release powder, titanium dioxide, kaolin and magnesium oxide to obtain a solid mixture, then sending the solid mixture into an alumina ball rolling machine, adding water to prepare balls, drying to obtain a carrier precursor, roasting the carrier precursor, and cooling to room temperature to obtain a carrier;
(2) Preparing an impregnating solution: weighing solid potassium carbonate, sodium carbonate, nickel carbonate, cobalt carbonate, ammonium molybdate and potassium manganate according to the components of the active components and the additives, and then dissolving the weighed active components and additives in an ammonia water solution to obtain an impregnating solution;
(3) And (3) immersing the carrier in the step (1) in the impregnating solution in the step (2), filtering and drying to obtain a solid phase substance, and drying the solid phase substance to obtain the COS hydrolysis catalyst for the blast furnace gas.
Preferably, in the step (1), in the process of preparing the carrier, the fast-release powder, titanium dioxide, kaolin and magnesium oxide are as follows in percentage by mass: 50-80% of quick-release powder, 20-30% of titanium dioxide, 10-20% of kaolin and 0-10% of magnesium oxide; and/or
In the preparation process of the carrier precursor, the drying temperature is controlled to be 120-150 ℃ and the drying time is controlled to be 2-4h; and/or
In the step (1), in the preparation process of the carrier, the roasting temperature of the carrier precursor is controlled to be 400-600 ℃ and the roasting time is controlled to be 3-5h.
Preferably, in the step (2), the solid potassium carbonate, sodium carbonate, nickel carbonate, cobalt carbonate, ammonium molybdate and potassium manganate are mixed according to the mass ratio of (50-70): (20-40): (0-10): (0-5): (0-5): (0-5); and/or
In the step (2), each 100g of active components and additives are dissolved in 400ml of ammonia water in the process of preparing the impregnating solution; and/or
In the step (2), the concentration of the ammonia water is 3-8wt%.
Preferably, in the step (3), the impregnation time is 1 to 2 hours; and/or
In the step (3), the drying temperature of the solid phase object is 150-250 ℃ and the drying time is 3-5h.
Preferably, the COS hydrolysis catalyst for the blast furnace gas has the hydrolysis conversion rate of COS in the blast furnace gas reaching more than 90 percent at the temperature of 50-80 ℃.
The invention has the beneficial effects that:
1. the COS hydrolysis catalyst for blast furnace gas is prepared by loading active components and additives on a carrier by an impregnation method, has the characteristics of sulfur resistance, oxygen resistance, sulfation resistance, HCN resistance and other acid gas corrosion resistance, excellent low-temperature activity and the like, has strong low-temperature toxicity resistance, high COS hydrolysis conversion rate and slow activity reduction, and is suitable for large-scale devices such as blast furnace gas and the like;
2. the COS hydrolysis catalyst for blast furnace gas and the preparation method thereof can achieve the COS hydrolysis conversion rate of more than 90% in the blast furnace gas at 50-80 ℃, has slow activation attenuation in a high-sulfur and high-oxygen environment, and is suitable for industrial mass production;
3. the COS hydrolysis catalyst for blast furnace gas can be suitable for blast furnace gas and other gas environments with complex components, high sulfur, high oxygen and high acidity, and has the advantages of strong sulfation resistance, acid corrosion resistance, good low-temperature activity, slow activity reduction and long service life.
Detailed Description
In order to better understand the above technical solution of the present invention, the technical solution of the present invention is further described below with reference to examples.
The COS hydrolysis catalyst for blast furnace gas provided by the invention comprises a carrier, an active component and an additive, wherein the active component and the additive are carried on the carrier; the chemical components of the carrier comprise alumina, titanium oxide, silicon dioxide and magnesium oxide; the chemical components of the active component comprise potassium carbonate and sodium carbonate; the chemical components of the additive comprise nickel carbonate, cobalt carbonate, ammonium molybdate and potassium manganate, and the main effects of the additive are activity enhancement and detoxification. In the components of COS hydrolyzing catalyst for blast furnace gas, the carrier accounts for 70-85wt%, the active component accounts for 15-25wt% and the additive accounts for 5-10wt%.
The carrier is prepared from the following raw materials in percentage by mass: 50-80% of quick-release powder, 20-30% of titanium dioxide, 10-20% of kaolin and 0-10% of magnesium oxide.
The active components comprise the following components in percentage by mass: 60-80% of potassium carbonate and 20-40% of sodium carbonate.
The additive comprises the following components in percentage by mass: 50-80% of nickel carbonate, 15-40% of cobalt carbonate, 5-15% of ammonium molybdate and 0-10% of potassium manganate.
In a further preferred embodiment, the additive comprises 50-70wt% of nickel carbonate, 15-30wt% of cobalt carbonate, 5-10wt% of ammonium molybdate and 3-7wt% of potassium manganate.
The COS hydrolysis catalyst for blast furnace gas is prepared by loading active components and additives on a carrier through an impregnation method, and specifically comprises the following steps:
(1) Preparing a carrier: uniformly mixing quick-release powder, titanium dioxide, kaolin and magnesium oxide to obtain a solid mixture, then sending the solid mixture into an alumina ball rolling machine, adding water to prepare balls, drying to obtain a carrier precursor, roasting the carrier precursor, and cooling to room temperature to obtain a carrier;
the specific process is as follows: firstly, weighing quick-release powder, titanium dioxide, kaolin and magnesium oxide according to raw material components adopted by a carrier, and adding the quick-release powder, the titanium dioxide, the kaolin and the magnesium oxide into a stirring tank for uniform mixing to obtain a solid mixture; then loading the uniformly mixed solid mixture into an alumina ball rolling machine, adding water, rolling into balls, and drying at a drying temperature of 120-150 ℃ for 2-4 hours to obtain a carrier precursor; and then roasting the carrier precursor for 3-5 hours at the roasting temperature of 400-600 ℃ to prepare the carrier. Wherein the mass ratio of the quick-release powder to the titanium dioxide to the kaolin to the magnesium oxide is as follows: (50-80): (20-30): (5-20): (0-10);
(2) Preparing an impregnating solution: weighing solid potassium carbonate, sodium carbonate, nickel carbonate, cobalt carbonate, ammonium molybdate and potassium manganate according to the components of the active components and the additives, and then dissolving the weighed active components and additives in an ammonia water solution to obtain an impregnating solution;
the specific process is as follows: weighing solid potassium carbonate, sodium carbonate, nickel carbonate, cobalt carbonate, ammonium molybdate and potassium manganate according to the components of the active components and the additives, and controlling the mass ratio of the solid potassium carbonate, sodium carbonate, nickel carbonate, cobalt carbonate, ammonium molybdate and potassium manganate to be (50-70): (20-40): (0-10): (0-5): (0-5): (0-5). Dissolving the weighed active components and additives in an ammonia water solution to obtain an impregnating solution, and dissolving each 100g of the active components and additives in 400ml of ammonia water in the process of preparing the impregnating solution; wherein the concentration of the ammonia water is 3-8wt%.
(3) And (3) immersing the carrier in the step (1) in the impregnating solution in the step (2), filtering and drying to obtain a solid phase substance, and drying the solid phase substance to obtain the COS hydrolysis catalyst for the blast furnace gas.
The specific process is as follows: the carrier is immersed in the immersion liquid containing the active components and the additives for 1-2 hours, so that the active components and the additives are loaded on the carrier, and then the solid phase is obtained after filtration and drying, and the solid phase is dried for 3-5 hours at the drying temperature of 150-250 ℃, and then cooled to room temperature, thus obtaining the COS hydrolysis catalyst for the blast furnace gas.
The prepared COS hydrolysis catalyst for the blast furnace gas has the hydrolysis conversion rate of COS in the blast furnace gas reaching more than 90 percent at 50-80 ℃.
The COS hydrolysis catalyst for blast furnace gas and the preparation method thereof according to the present invention are further described below with reference to specific examples;
example 1
The COS hydrolysis catalyst for blast furnace gas in this example is prepared by the steps of:
(1) Preparing a carrier: mixing the quick-release powder, titanium dioxide, kaolin and magnesium oxide according to the proportion of 70:20:5:5, adding the mixture into a stirring tank, and uniformly mixing to obtain a solid mixture; loading the uniformly mixed solid mixture into an alumina ball mill, adding water, rolling into balls, drying for 2 hours at a drying temperature of 120 ℃ to obtain a carrier precursor, and roasting the carrier precursor for 3 hours at a roasting temperature of 600 ℃ to obtain a carrier;
(2) Preparing an impregnating solution: controlling solid potassium carbonate according to the component weighing of the active component and the additive: sodium carbonate: nickel carbonate: cobalt carbonate: ammonium molybdate: potassium manganate=70: 20:6:2:1.5:0.5 (mass ratio) 100g of the weighed solid was dissolved in 400ml of an aqueous ammonia solution having a concentration of 5% to obtain an impregnating solution;
(3) And (3) immersing the prepared carrier in an immersion liquid for 1h, filtering and drying to obtain a solid phase, drying the solid phase at a drying temperature of 150 ℃ for 5h, and cooling to room temperature to obtain the COS hydrolysis catalyst for the blast furnace gas.
In the COS hydrolysis catalyst for blast furnace gas prepared in the above way, the carrier accounts for 82wt%, the active component accounts for 16.2wt% and the additive accounts for 1.8wt%.
The activity of the COS hydrolysis catalyst for blast furnace gas prepared in this example was represented by COS hydrolysis conversion, wherein the conversion of the hydrolyzer was evaluated according to Q/WHB 009-2016, under the following test conditions: the temperature is 50-80 ℃ and the airspeed is 1000h -1 Inlet COS content of 100-200ppm, H 2 S concentration 100-200ppm, O 2 The concentration is 0.2-0.3%, and the hydrolysis conversion rate of the COS hydrolysis catalyst is 95-99%.
Example 2
The COS hydrolysis catalyst for blast furnace gas in this example is prepared by the steps of:
(1) Preparing a carrier: mixing the quick-release powder, titanium dioxide, kaolin and magnesium oxide according to the proportion of 75:10:10:5, adding the mixture into a stirring tank, and uniformly mixing to obtain a solid mixture; loading the uniformly mixed solid mixture into an alumina ball mill, adding water, rolling into balls, drying for 4 hours at a drying temperature of 120 ℃ to obtain a carrier precursor, and roasting the carrier precursor for 3 hours at a roasting temperature of 400 ℃ to obtain a carrier;
(2) Preparing an impregnating solution: controlling solid potassium carbonate according to the component weighing of the active component and the additive: sodium carbonate: nickel carbonate: cobalt carbonate: ammonium molybdate: potassium manganate=50: 30:10:6:3:1 (mass ratio), dissolving 100g of the weighed solid in 400ml of ammonia water solution to obtain an impregnating solution, wherein the concentration of the ammonia water solution is 8%;
(3) And (3) immersing the prepared carrier in an immersion liquid for 2 hours, filtering and drying to obtain a solid phase substance, drying the solid phase substance at a drying temperature of 250 ℃ for 3 hours, and cooling to room temperature to obtain the COS hydrolysis catalyst for the blast furnace gas.
In the COS hydrolysis catalyst for blast furnace gas prepared in the above way, the carrier accounts for 78wt%, the active component accounts for 17.6wt% and the additive accounts for 4.4wt%.
The activity of the COS hydrolysis catalyst for blast furnace gas prepared in this example was represented by COS hydrolysis conversion, wherein the conversion of the hydrolyzer was evaluated according to Q/WHB 009-2016, under the following test conditions: the temperature is 50-80 ℃ and the airspeed is 1000h -1 Inlet COS content of 100-200ppm, H 2 S concentration 100-200ppm, O 2 The concentration is 0.2-0.3%, and the hydrolysis conversion rate of the COS hydrolysis catalyst is 93-99%.
Example 3
The COS hydrolysis catalyst for blast furnace gas in this example is prepared by the steps of:
(1) Preparing a carrier: mixing the quick-release powder, titanium dioxide, kaolin and magnesium oxide according to the proportion of 60:25:12:3, adding the mixture into a stirring tank, and uniformly mixing to obtain a solid mixture; loading the uniformly mixed solid mixture into an alumina ball mill, adding water, rolling into balls, drying for 3 hours at a drying temperature of 130 ℃ to obtain a carrier precursor, and roasting the carrier precursor for 4 hours at a roasting temperature of 500 ℃ to obtain a carrier;
(2) Preparing an impregnating solution: controlling solid potassium carbonate according to the component weighing of the active component and the additive: sodium carbonate: nickel carbonate: cobalt carbonate: ammonium molybdate: potassium manganate=60: 25:10:2.5:2:0.5 (mass ratio) 100g of the weighed solid was dissolved in 400ml of an aqueous ammonia solution having a concentration of 4% to obtain an impregnating solution;
(3) And (3) immersing the prepared carrier in an immersion liquid for 1.5 hours, filtering and drying to obtain a solid phase substance, drying the solid phase substance at a drying temperature of 200 ℃ for 3.5 hours, and cooling to room temperature to obtain the COS hydrolysis catalyst for the blast furnace gas.
In the COS hydrolysis catalyst for blast furnace gas prepared in the above way, the carrier accounts for 83wt%, the active component accounts for 14.5wt% and the additive accounts for 2.5wt%.
The activity of the COS hydrolysis catalyst for blast furnace gas prepared in this example was represented by COS hydrolysis conversion, wherein the conversion of the hydrolyzer was evaluated according to Q/WHB 009-2016, under the following test conditions: the temperature is 50-80 ℃ and the airspeed is 1000h -1 Inlet COS content of 100-200ppm, H 2 S concentration 100-200ppm, O 2 The concentration is 0.2-0.3%, and the hydrolysis conversion rate of the COS hydrolysis catalyst is 92-99%.
Example 4
The COS hydrolysis catalyst for blast furnace gas in this example is prepared by the steps of:
(1) Preparing a carrier: mixing the quick-release powder, titanium dioxide, kaolin and magnesium oxide according to the proportion of 70:20:5:5, adding the mixture into a stirring tank, and uniformly mixing to obtain a solid mixture; loading the uniformly mixed solid mixture into an alumina ball mill, adding water, rolling into balls, drying at a drying temperature of 140 ℃ for 2.5 hours to obtain a carrier precursor, and roasting the carrier precursor at a roasting temperature of 450 ℃ for 4 hours to obtain a carrier;
(2) Preparing an impregnating solution: controlling solid potassium carbonate according to the component weighing of the active component and the additive: sodium carbonate: nickel carbonate: cobalt carbonate: ammonium molybdate: potassium manganate=55: 30:9:4:1:1 (mass ratio), dissolving 100g of the weighed solid in 400ml of ammonia water solution to obtain an impregnating solution, wherein the concentration of the ammonia water solution is 3%;
(3) And (3) immersing the prepared carrier in an immersion liquid for 1h, filtering and drying to obtain a solid phase, drying the solid phase at a drying temperature of 180 ℃ for 4.5h, and cooling to room temperature to obtain the COS hydrolysis catalyst for the blast furnace gas.
In the COS hydrolysis catalyst for blast furnace gas prepared in the above way, the carrier accounts for 76wt%, the active component accounts for 20.4wt% and the additive accounts for 3.6wt%.
The activity of the COS hydrolysis catalyst for blast furnace gas prepared in this example was represented by COS hydrolysis conversion, wherein the conversion of the hydrolyzer was evaluated according to Q/WHB 009-2016, under the following test conditions: the temperature is 50-80 ℃ and the airspeed is 1000h -1 Inlet COS content of 100-200ppm, H 2 S concentration 100-200ppm, O 2 The concentration is 0.2-0.3%, and the hydrolysis conversion rate of the COS hydrolysis catalyst is 95-99%.
Example 5
The COS hydrolysis catalyst for blast furnace gas in this example is prepared by the steps of:
(1) Preparing a carrier: mixing the quick-release powder, titanium dioxide, kaolin and magnesium oxide according to the proportion of 65:20:10:5, adding the mixture into a stirring tank, and uniformly mixing to obtain a solid mixture; loading the uniformly mixed solid mixture into an alumina ball mill, adding water, rolling into balls, drying at a drying temperature of 140 ℃ for 2.5 hours to obtain a carrier precursor, and roasting the carrier precursor at a roasting temperature of 500 ℃ for 4 hours to obtain a carrier;
(2) Preparing an impregnating solution: controlling solid potassium carbonate according to the component weighing of the active component and the additive: sodium carbonate: nickel carbonate: cobalt carbonate: ammonium molybdate: potassium manganate=60: 30:7:1.5:1:0.5 (mass ratio) 100g of the weighed solid was dissolved in 400ml of an aqueous ammonia solution having a concentration of 4% to obtain an impregnating solution;
(3) And (3) immersing the prepared carrier in an immersion liquid for 1h, filtering and drying to obtain a solid phase substance, drying the solid phase substance at a drying temperature of 200 ℃ for 4h, and cooling to room temperature to obtain the COS hydrolysis catalyst for the blast furnace gas.
In the COS hydrolysis catalyst for blast furnace gas prepared in the above way, the carrier accounts for 75wt%, the active component accounts for 21wt% and the additive accounts for 4wt%.
The activity of the COS hydrolysis catalyst for blast furnace gas prepared in this example was represented by COS hydrolysis conversion, wherein the conversion of the hydrolyzer was evaluated according to Q/WHB 009-2016, under the following test conditions: the temperature is 50-80 ℃ and the airspeed is 1000h -1 Inlet COS content of 100-200ppm, H 2 S concentration 100-200ppm, O 2 The concentration is 0.2-0.3%, and the hydrolysis conversion rate of the COS hydrolysis catalyst is 92-99%.
Example 6
The COS hydrolysis catalyst for blast furnace gas in this example is prepared by the steps of:
(1) Preparing a carrier: mixing the quick-release powder, titanium dioxide, kaolin and magnesium oxide according to the proportion of 60:20:10:10, adding the mixture into a stirring tank, and uniformly mixing to obtain a solid mixture; loading the uniformly mixed solid mixture into an alumina ball mill, adding water, rolling into balls, drying for 2 hours at a drying temperature of 120 ℃ to obtain a carrier precursor, and roasting the carrier precursor for 3 hours at a roasting temperature of 600 ℃ to obtain a carrier;
(2) Preparing an impregnating solution: controlling solid potassium carbonate according to the component weighing of the active component and the additive: sodium carbonate: nickel carbonate: cobalt carbonate: ammonium molybdate: potassium manganate=51: 35:9.45:3:1.5:1.05 (mass ratio) 100g of the weighed solid was dissolved in 400ml of an aqueous ammonia solution having a concentration of 3% to obtain an impregnating solution;
(3) And (3) immersing the prepared carrier in an immersion liquid for 1h, filtering and drying to obtain a solid phase, drying the solid phase at a drying temperature of 150 ℃ for 5h, and cooling to room temperature to obtain the COS hydrolysis catalyst for the blast furnace gas.
In the COS hydrolysis catalyst for blast furnace gas prepared in the above way, the carrier accounts for 81wt%, the active component accounts for 17.2wt% and the additive accounts for 1.8wt%.
The activity of the COS hydrolysis catalyst for blast furnace gas prepared in this example was represented by COS hydrolysis conversion, wherein the conversion of the hydrolyzer was evaluated according to Q/WHB 009-2016, under the following test conditions: the temperature is 50-80 ℃ and the airspeed is 1000h -1 Inlet COS content of 100-200ppm, H 2 S concentration 100-200ppm, O 2 The concentration is 0.2-0.3%, and the hydrolysis conversion rate of the COS hydrolysis catalyst is measured to be 91-99%.
It will be appreciated by persons skilled in the art that the above embodiments are provided for illustration only and not for limitation of the invention, and that variations and modifications of the above described embodiments are intended to fall within the scope of the claims of the invention as long as they fall within the true spirit of the invention.
Claims (3)
1. The COS hydrolysis catalyst for blast furnace gas is characterized by comprising a carrier, an active component and an additive, wherein the active component and the additive are carried on the carrier;
the chemical components of the carrier comprise aluminum oxide, titanium oxide, silicon dioxide and magnesium oxide;
the chemical components of the active component comprise potassium carbonate and sodium carbonate;
the chemical components of the additive comprise nickel carbonate, cobalt carbonate, ammonium molybdate and potassium manganate,
the carrier comprises the following raw materials in percentage by mass: 50-80% of quick-release powder, 20-30% of titanium dioxide, 5-20% of kaolin and 0-10% of magnesium oxide, wherein the magnesium oxide is not 0;
the active components comprise the following components in percentage by mass: 60-80% of potassium carbonate and 20-40% of sodium carbonate;
the additive comprises the following components in percentage by mass: 50-80% of nickel carbonate, 15-40% of cobalt carbonate, 5-15% of ammonium molybdate and 0-10% of potassium manganate, wherein the potassium manganate is not 0;
the COS hydrolysis catalyst for the blast furnace gas is prepared by the following method and comprises the following steps:
(1) Preparing a carrier: uniformly mixing quick-release powder, titanium dioxide, kaolin and magnesium oxide to obtain a solid mixture, then sending the solid mixture into an alumina ball rolling machine, adding water to prepare balls, drying to obtain a carrier precursor, roasting the carrier precursor, and cooling to room temperature to obtain a carrier;
(2) Preparing an impregnating solution: weighing solid potassium carbonate, sodium carbonate, nickel carbonate, cobalt carbonate, ammonium molybdate and potassium manganate according to the components of the active components and the additives, and then dissolving the weighed active components and additives in an ammonia water solution to obtain an impregnating solution;
(3) Soaking the carrier in the step (1) in the soaking liquid in the step (2), filtering and drying to obtain a solid phase substance, drying the solid phase substance to obtain the COS hydrolysis catalyst for blast furnace gas,
the COS hydrolysis catalyst for the blast furnace gas has the hydrolysis conversion rate of COS in the blast furnace gas reaching more than 90 percent at 50-80 ℃;
in the COS hydrolysis catalyst for blast furnace gas, the carrier accounts for 70-85wt%, the active component accounts for 15-25wt% and the additive accounts for 5-10wt%.
2. The COS hydrolysis catalyst for blast furnace gas as claimed in claim 1, wherein the additive comprises nickel carbonate 50-70wt%, cobalt carbonate 15-30wt%, ammonium molybdate 5-10wt% and potassium manganate 3-7wt%.
3. A method for producing the COS hydrolysis catalyst for blast furnace gas as claimed in claim 1 or 2, comprising the steps of:
(1) Preparing a carrier: uniformly mixing quick-release powder, titanium dioxide, kaolin and magnesium oxide to obtain a solid mixture, then sending the solid mixture into an alumina ball rolling machine, adding water to prepare balls, drying to obtain a carrier precursor, roasting the carrier precursor, and cooling to room temperature to obtain a carrier;
(2) Preparing an impregnating solution: weighing solid potassium carbonate, sodium carbonate, nickel carbonate, cobalt carbonate, ammonium molybdate and potassium manganate according to the components of the active components and the additives, and then dissolving the weighed active components and additives in an ammonia water solution to obtain an impregnating solution;
(3) Soaking the carrier in the step (1) in the soaking liquid in the step (2), filtering and drying to obtain a solid phase substance, and drying the solid phase substance to obtain the COS hydrolysis catalyst for the blast furnace gas, wherein the COS hydrolysis conversion rate of the COS in the blast furnace gas can reach more than 90% at 50-80 ℃ by using the COS hydrolysis catalyst for the blast furnace gas;
in the step (1), in the process of preparing the carrier, the quick-release powder, titanium dioxide, kaolin and magnesium oxide are prepared from the following components in percentage by mass: 50-80% of quick-release powder, 20-30% of titanium dioxide, 10-20% of kaolin and 0-10% of magnesium oxide;
in the preparation process of the carrier precursor, the drying temperature is controlled to be 120-150 ℃ and the drying time is controlled to be 2-4h; in the preparation process of the carrier, the roasting temperature of the carrier precursor is controlled to be 400-600 ℃ and the roasting time is controlled to be 3-5h; in the step (2), the solid potassium carbonate, sodium carbonate, nickel carbonate, cobalt carbonate, ammonium molybdate and potassium manganate are mixed according to the mass ratio of (50-70): (20-40): (0-10): (0-5): (0-5): (0-5) nickel carbonate, cobalt carbonate, ammonium molybdate and potassium manganate, the mass of which is not 0;
in the step (2), each 100g of active components and additives are dissolved in 400ml of ammonia water in the process of preparing the impregnating solution; in the step (2), the concentration of the ammonia water is 3-8wt%;
in the step (3), the soaking time is 1-2h; in the step (3), the drying temperature of the solid phase object is 150-250 ℃ and the drying time is 3-5h.
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