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Catalyst for synthesizing acidic gas absorbent and preparation method for catalyst

An acid gas and catalyst technology, which is applied in the field of catalyst for synthesizing acid gas absorbent and its preparation, can solve the problems of easy falling off of active components, decreased catalytic performance, many catalyst steps, etc., and achieves low price, simple preparation process, and avoidance of Easy to fall off effect

Inactive Publication Date: 2013-01-30
NANJING UNIV OF INFORMATION SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The catalyst preparation process of this method has many steps, long time, high calcination temperature, and requires H 2 Reduction, especially the active component loaded on the carrier by impregnation method is easy to fall off, resulting in a decrease in catalytic performance

Method used

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  • Catalyst for synthesizing acidic gas absorbent and preparation method for catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Crush 88g of porous silica gel into 30-50nm powder, dry at 100°C for 2 hours, then calcinate at 400°C for 2h in a horse boiling furnace, take it out and cool it to room temperature for later use; put 39g of Ni(NO 3 ) 2 ·6H 2 O, 3g Cu(NO 3 ) 2 ·3H 2 O and 1.5g La(NO 3 ) 3 ·6H 2 O was dissolved in deionized water to form a mixed solution; 0.01g 2H 3 PO 4 ·24WO 3 48H 2 O is dissolved in deionized water to form a solution and is ready for use; add silica gel powder to the mixed solution, add 0.15mol ammonium bicarbonate or ammonium bicarbonate while stirring to form a precipitate, mature at 80 °C for 2 hours, filter, remove the filtrate, and keep the precipitate The precipitate is dried at 100°C for 4 hours, then calcined in a horse-boiling furnace at 350°C for 4 hours, cooled and then immersed in phosphotungstic acid solution, and evaporated to dryness in a water bath at 80°C; the evaporated matter is dried at 100°C for 4 hours , and then calcined at 350°C for 4...

Embodiment 2

[0027] Crush 71.5g of porous silica gel into 30-50nm powder, dry at 150°C for 3 hours, then calcinate at 350°C for 3h in a horse boiling furnace, take it out and cool it to room temperature for later use; put 78g of Ni(NO 3 ) 2 ·6H 2 O, 9g Cu(NO 3 ) 2 ·3H 2 O and 6.6g La(NO 3 ) 3 ·6H 2O was dissolved in deionized water to form a mixed solution; 0.5g 2H 3 PO 4 ·24WO 3 48H 2 O is dissolved in deionized water to form a solution and is ready for use; add silica gel powder to the mixed solution, add 0.32mol ammonium bicarbonate or ammonium bicarbonate while stirring to form a precipitate, mature at 100 °C for 3 hours, filter, remove the filtrate, and keep the precipitate The precipitate is dried at 150°C for 5 hours, then calcined in a horse-boiler furnace at 400°C for 5 hours, cooled and then immersed in phosphotungstic acid solution, and evaporated to dryness in a water bath at 90°C; the evaporated matter is dried at 150°C for 5 hours , and then calcined at 400°C for 5...

Embodiment 3

[0029] Crush 49g of porous silica gel into 30-50nm powder, dry at 200°C for 4 hours, then calcinate at 500°C for 4h in a horse boiling furnace, take it out and cool it to room temperature for later use; put 136g of Ni(NO 3 ) 2 ·6H 2 O, 15g Cu(NO 3 ) 2 ·3H 2 O and 13.5g La(NO 3 ) 3 ·6H 2 O was dissolved in deionized water to form a mixed solution; 1g 2H 3 PO 4 ·24WO 3 48H 2 O is dissolved in deionized water to form a solution and is ready for use; add silica gel powder to the mixed solution, add 0.56mol ammonium bicarbonate or ammonium bicarbonate under stirring to form a precipitate, mature at 120 °C for 5 hours, filter, remove the filtrate, and keep the precipitate The precipitate was dried at 180°C for 6 hours, then calcined in a horse-boiler furnace at 500°C for 6 hours, cooled and then immersed in phosphotungstic acid solution, and evaporated to dryness in a water bath at 100°C; the evaporated matter was dried at 180°C for 6 hours , and then calcined at 500°C fo...

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Abstract

The invention relates to a catalyst for synthesizing an acidic gas absorbent and a preparation method for the catalyst. Oxides of Ni, Cu and La and phosphotungstic acid are loaded on a porous SiO2 carrier by a precipitation method. The catalyst comprises the following components in percentage by mass: 10 to 35 percent of NiO, 1 to 5 percent of CuO, 1 to 10 percent of La2O3, 0.01 to 1.0 percent of phosphotungstic acid, and the balance of the carrier. According to the catalyst for synthesizing the acidic gas absorbent and the preparation method for the catalyst, the preparation method is rich in raw materials and low in price, the preparation process is simple, H2 for reduction is not required, the synthetic technology is low in operating cost, and the catalyst is directly used as the acidic gas absorbent without purification and separation.

Description

technical field [0001] The invention relates to the field of catalytic synthesis and separation, in particular to a catalyst for synthesizing an acid gas absorbent and a preparation method thereof. Background technique [0002] Mixed gases such as natural gas, synthesis gas, refinery gas, Claus tail gas, power plant tail gas and flue gas often contain various acid gases 2 S, SO 2 and CO 2 etc. Before the mixed gas is further processed or discharged, it must be purified to remove the acid gas in order to meet the requirements of subsequent sections or environmental protection emission standards. The use of absorbents to remove acid gases in mixed gas is one of the most commonly used methods in industry at present. High-efficiency and energy-saving acid gas absorbents are the fields that domestic and foreign researchers pay attention to and are eager to open up. In the current energy shortage and increasingly severe environment Under the circumstances, high efficiency and e...

Claims

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Application Information

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IPC IPC(8): B01J27/188B01D53/78B01D53/50B01D53/52B01D53/62
Inventor 陆建刚花爱春许正文承玲林凤英樊璠
Owner NANJING UNIV OF INFORMATION SCI & TECH
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