Renewable adsorbent for hydrogen sulfide removal and preparation method thereof

An adsorbent and hydrogen sulfide technology, applied in chemical instruments and methods, separation methods, filter regeneration, etc., can solve the problems of cumbersome preparation process and high manufacturing cost of adsorbents, achieve concentration of mesoporous channels, improve utilization effect, and save The effect of operating energy consumption

Pending Publication Date: 2022-03-08
SHANGHAI LVQIANG NEW MATERIALS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The above regenerable adsorbents, although for H 2 S can maintain a certain adsorption effect, but there are still some disadvantages,

Method used

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  • Renewable adsorbent for hydrogen sulfide removal and preparation method thereof
  • Renewable adsorbent for hydrogen sulfide removal and preparation method thereof
  • Renewable adsorbent for hydrogen sulfide removal and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Step 1: Weigh 100g of activated alumina and 100g of ZSM-5 molecular sieve with a silicon-aluminum ratio of 15, add it to 375g of sodium metaaluminate solution with a concentration of 2.8%wt, and maintain at 80°C for 4h under stirring conditions.

[0045] Step 2: drying the slurry solution obtained in Step 1 at a temperature of 100° C. for 8 hours, and then crushing and grinding to obtain a modified mixed powder.

[0046] Step 3, mix 150g of mixed powder obtained in step 2 with 80g of sodium acetate and sodium bicarbonate with a concentration of 0.5%wt, wherein the mass ratio of sodium acetate to sodium bicarbonate is 1:1, mix and shape to obtain spherical particles, and then Drying at 100°C, followed by calcination at 200°C for 1 hour, 450°C for 0.5 hours, and 550°C for 0.5 hours to obtain the finished adsorbent. Labeled as sample S-1.

Embodiment 2

[0048] Step 1: Weigh 100g of activated alumina and 20g of ZSM-5 molecular sieve with a silicon-aluminum ratio of 150, add it to 360g of 5%wt sodium metaaluminate solution, and maintain at 80°C for 4h under stirring conditions.

[0049] Step 2: Spray-dry the slurry solution obtained in Step 1 at a temperature of 180° C. for 0.5 h to obtain a modified mixed powder.

[0050] Step 3, mix 130g of the mixed powder obtained in step 2 with 100g, the concentration is 3.0%wt sodium acetate and sodium bicarbonate, wherein the mass ratio of sodium acetate and sodium bicarbonate is 1:1, mix and shape to obtain bar-shaped particles, and then Drying at 100°C, followed by calcination at 200°C for 1h, 450°C for 0.5h, and 550°C for 0.5h to obtain the finished adsorbent. Labeled as sample S-2.

Embodiment 3

[0052] Step 1: Weigh 100g of activated alumina and 50g of ZSM-5 molecular sieve with a silicon-aluminum ratio of 20, add it to 1350g of 5%wt sodium metaaluminate solution, and maintain at 80°C for 4h under stirring.

[0053] Step 2: drying the slurry solution obtained in Step 1 at a temperature of 100° C. for 8 hours, and then crushing and grinding to obtain a modified mixed powder.

[0054] Step 3, 120g of mixed powder obtained in step 2 is mixed with 80g of sodium acetate and sodium bicarbonate with a concentration of 0.5%wt, wherein the mass ratio of sodium acetate to sodium bicarbonate is 1:1, mixed and formed to obtain spherical particles, and then in Drying at 100°C, followed by calcination at 200°C for 1h, 450°C for 0.5h, and 550°C for 0.5h to obtain the finished adsorbent. Labeled as sample S-3.

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Abstract

The invention relates to a renewable adsorbent for hydrogen sulfide removal and a preparation method thereof, the adsorbent is composed of an active component and a carrier, the active component is an alkaline metal salt, and the carrier is a composite carrier having a plurality of mesoporous channel structures and composed of activated alumina and a molecular sieve. Compared with the prior art, by adjusting the pore channel structure of the composite carrier in the adsorbent, the composite carrier has mesoporous structures with pore size distribution of 2-20 nm and 20-50 nm respectively, and the utilization effect of the active component is improved, so that the single-time use time of the adsorbent is prolonged, the regeneration frequency is reduced, and the purpose of reducing the operation energy consumption during industrial application is achieved.

Description

technical field [0001] The invention belongs to the technical field of adsorbent preparation, and relates to a renewable adsorbent for hydrogen sulfide removal and a preparation method thereof. Background technique [0002] In the petrochemical industry, the existence of hydrogen sulfide is extremely harmful. Hydrogen sulfide will not only cause equipment damage, catalyst poisoning, and product quality degradation, but may also pose a great threat to the safety of operators. Therefore, in order to avoid the harm caused by hydrogen sulfide, it must be removed. [0003] At present, there are many methods for removing hydrogen sulfide in industry, which can be summarized as chemical method removal and physical method removal. For example, US13395834B discloses a method for removing hydrogen sulfide from hydrocarbon streams, using zinc oxide to react with hydrogen sulfide to reduce the content of hydrogen sulfide in raw materials to a certain range. US03400389 discloses a kind...

Claims

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Application Information

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IPC IPC(8): B01J20/18B01J20/28B01J20/30B01J20/34B01D53/02
CPCB01J20/08B01J20/186B01J20/28083B01J20/3458B01J20/3433B01D53/02B01D2257/304
Inventor 李春成王鹏飞张佳徐华胜何秋平陈伟
Owner SHANGHAI LVQIANG NEW MATERIALS CO LTD
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