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Adsorption desulfurizer capable of being thermally regenerated and having COS hydrolysis function as well as preparation method and application of adsorption desulfurizer

A technology of adsorption desulfurization and thermal regeneration, applied in the direction of sulfur preparation/purification, chemical instruments and methods, separation methods, etc.

Pending Publication Date: 2021-12-14
山东迅达催化剂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But when the inlet airflow contains such as 5-50mg / m 3 When the COS is low, the activated carbon desulfurizer loaded with iron oxide or iron hydroxide has almost no COS hydrolysis ability, so COS breakthrough occurs quickly; 2 The influence of concentration is large, and COS breakthrough will also occur quickly

Method used

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  • Adsorption desulfurizer capable of being thermally regenerated and having COS hydrolysis function as well as preparation method and application of adsorption desulfurizer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-8、 comparative example 1-6

[0043] Prepare the adsorption desulfurizer of the ratio of Table 1 as follows:

[0044] A. Coal-based columnar activated carbon carrier with large pores is 100g, the pore volume is 0.65mL / g, and the specific surface area is 420m 2 / g, outer diameter 3.0mm, length 4-7mm, equal volume impregnated ferric nitrate solution of required concentration, dried at 120°C for 5 hours, cooled and equal volume impregnated with required concentration of sodium hydroxide solution, airtightly placed for reaction for 10 hours and washed with water until Wash out water Na + The concentration is lower than 40ppm, and dried at 130°C for 3 hours to produce ferric hydroxide / activated carbon semi-finished product; the amount of alkali in the sodium hydroxide solution is 1.10 times the amount required to completely react with the iron salt to form ferric hydroxide;

[0045] B. Measure the water absorption of ferric hydroxide / activated carbon semi-finished products, impregnate the required concentratio...

Embodiment 9-10

[0050] 50g of the adsorption desulfurizers of Examples 1 and 3 were each taken, and heat-treated in a tube furnace and 320°C normal-pressure superheated steam flow for 80hr, as the adsorption desulfurizers of Examples 9-10; Last change.

Embodiment 11

[0052] Using a tube furnace, take homemade (BDBU) PF 6 Two portions of 5.00g each were placed in a porcelain boat, and were treated in a 320°C normal-pressure nitrogen flow and a 320°C normal-pressure superheated steam flow for 80 hours respectively, and the weight loss by heat measurement was less than 1%; the samples before and after treatment were analyzed by infrared, and the results were The comparison shows that there is no thermal decomposition or generation of other substances, which is also consistent with the standard spectrum of the substance.

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Abstract

The invention provides an adsorption desulfurizer capable of being thermally regenerated and having a COS hydrolysis function as well as a preparation method and application of the adsorption desulfurizer. According to the invention, macroporous activated carbon is used as a carrier, and (BDBU)PF6 and ferric hydroxide are loaded; the loading capacity of the (BDBU)PF6 is 0.1-0.5% by mass, and the loading capacity of the ferric hydroxide is 5-10% by mass; and the adsorption desulfurizer has high H2S and COS desulfurization precision and high desulfurization capacity, the influence of a water vapor concentration and a CO2 concentration in gas flow on the desulfurization performance of the adsorption desulfurizer is small, and the COS hydrolysis performance and desulfurization precision of the adsorption desulfurizer are maintained before high desulfurization capacity is achieved.

Description

technical field [0001] The invention belongs to the technical field of gas purification, and specifically relates to an adsorption desulfurizer capable of thermal regeneration and COS hydrolysis function, a preparation method and an application thereof. Background technique [0002] The exhaust gas from the chimney of acid gas sulfur recovery unit, its SO 2 Concentration is a continuous monitoring item. "Petroleum Refining Industry Pollutant Discharge Standard" (GB31570-2015) stipulates that the SO 2 The emission concentration limit is 400mg / m 3 , the SO of key regions 2 The emission concentration limit is 100mg / m 3 ;Some provinces and cities implement higher emission standards, such as the key control area SO 2 Emission 50mg / m 3 , core control area 35mg / m 3 . The SO 2 Concentration is contained in H 2 S, COS, CS 2 The total value converted from the concentration of equal sulfides, where H 2 S, COS, CS 2 It is a foul odor pollutant, and the emission concentration...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01J20/30B01D53/48B01D53/52B01D53/81C01B17/04
CPCB01J20/22B01J20/20B01J20/06B01D53/81B01D53/52B01D53/48C01B17/0404C01B17/0408B01D2257/308B01D2257/304
Inventor 胡文宾崔旭浩杨金帅崔国栋邢西猛
Owner 山东迅达催化剂有限公司
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