Composite adsorbent for removing hydrogen sulfide at high temperature, and preparation method and application thereof

A composite adsorption and hydrogen sulfide technology, applied in chemical instruments and methods, separation methods, alkali metal compounds, etc., can solve the problems of poor desulfurization cycle stability, low desulfurization efficiency, and difficult regeneration, and achieve good desulfurization effect and reduce water consumption. , a wide range of effects

Active Publication Date: 2020-02-18
HUAZHONG UNIV OF SCI & TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of low desulfurization efficiency, poor desulfurization cycle stability, and difficult regeneration of desulfurizers in high-temperature gasification gas, and provide a high-temperature desulfurizer with high desulfurization efficiency and good cycle stability during the desulfurization-regeneration cycle process. Preparation method and application

Method used

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  • Composite adsorbent for removing hydrogen sulfide at high temperature, and preparation method and application thereof
  • Composite adsorbent for removing hydrogen sulfide at high temperature, and preparation method and application thereof
  • Composite adsorbent for removing hydrogen sulfide at high temperature, and preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0045] Take 30 grams of aluminum nitrate and dissolve it in distilled water, add 4.5 grams of polyvinyl alcohol, and add 1 gram of lanthanum nitrate, and ultrasonically treat it for 6 hours to completely dissolve it. Diluted aqueous ammonia was then added dropwise to the solution and stirred until pH reached 9. Alumina gel was prepared and rinsed 3 times with distilled water. The samples were dried at 110 degrees, calcined at 600 degrees for 6 hours, and cooled to room temperature to obtain modified alumina. The 20% lanthanum nitrate solution with a mass concentration of 20% was immersed in an equal volume of modified alumina, dispersed by ultrasonic to make it evenly mixed, immersed in a rotary mixer for 12 hours, and calcined at 800 degrees for 6 hours. The mixed solution of manganese nitrate (2mol / L) and nickel nitrate (12%) was immersed in the calcined sample in equal volume. During the immersion process, it was first sonicated for 10 minutes, then immersed in a rotary mi...

Embodiment 2

[0047]Take 30 grams of aluminum nitrate and dissolve it in distilled water, add 4.5 grams of polyvinyl alcohol, and add 1 gram of cerium nitrate, and ultrasonically treat it for 6 hours to completely dissolve it. Diluted aqueous ammonia was then added dropwise to the solution and stirred until pH reached 9. Alumina gel was prepared and rinsed 3 times with distilled water. The samples were dried at 110 degrees, calcined at 600 degrees for 6 hours, and cooled to room temperature to obtain modified alumina. The 20% lanthanum nitrate solution with a mass concentration of 20% was immersed in an equal volume of modified alumina, dispersed by ultrasonic to make it evenly mixed, immersed in a rotary mixer for 12 hours, and calcined at 800 degrees for 6 hours. The mixed solution of manganese nitrate (2mol / L) and cerium nitrate (20%) was immersed into the calcined sample in equal volume. During the immersion process, it was first ultrasonicated for 10 minutes, then immersed in a rotary...

Embodiment 3

[0049] Take 30 grams of aluminum nitrate and dissolve it in distilled water, add 5 grams of polyvinyl alcohol, and add 2 grams of lanthanum nitrate, and ultrasonically treat it for 6 hours to completely dissolve it. Diluted aqueous ammonia was then added dropwise to the solution and stirred until pH reached 9. Alumina gel was prepared and rinsed 3 times with distilled water. The samples were dried at 110 degrees, calcined at 600 degrees for 6 hours, and cooled to room temperature to obtain modified alumina. The 20% lanthanum nitrate solution with a mass concentration of 20% was immersed in an equal volume of modified alumina, dispersed by ultrasonic to make it evenly mixed, immersed in a rotary mixer for 12 hours, and calcined at 800 degrees for 6 hours. The mixed solution of manganese nitrate (1mol / L) and barium nitrate (20%) was immersed into the calcined sample in equal volume. During the immersion process, it was first ultrasonicated for 10 minutes, then immersed in a rot...

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Abstract

The invention belongs to the technical field of desulfurization adsorbents, and particularly relates to a composite adsorbent for removing hydrogen sulfide at a high temperature, and a preparation method and application thereof. The composite adsorbent for removing hydrogen sulfide provided by the invention comprises the following components in percentage by weight: 10%-50% of manganese oxide, 30%-40% of alumina, and 2%-15% of an auxiliary agent, wherein the auxiliary agent is selected from a mixture of at least two of lanthanum oxide, cerium oxide, barium oxide or nickel oxide. The compositeadsorbent for removing hydrogen sulfide can work normally at 800 DEG C or more, and has the following advantages: 1) the desulfurization effect of the fresh adsorbent is good, in the simulated reducing atmosphere desulfurization experiment, a removal rate of hydrogen sulfide is close to 100%, and the content of hydrogen sulfide in a tail gas is less than 1 mg / m<3>; 2) the desulfurization performance of the adsorbent is stable during the desulfurization-regeneration cycle process, the breakthrough sulfur capacity and desulfurization efficiency are both kept stable, and the hydrogen sulfide content in the tail gas is less than 3 mg / m<3> during the desulfurization process; and 3) the adsorbent is in a dry state, no aqueous solution is required during use, and thereby the water consumption isreduced.

Description

technical field [0001] The invention belongs to the technical field of desulfurization adsorbents, and in particular relates to a high-temperature hydrogen sulfide removal composite adsorbent and a preparation method and application thereof, which are suitable for integrated coal gasification combined cycle power generation (IGCC), fuel cells and biomass gasification power generation (BGPG) ). Background technique [0002] The integrated coal gasification combined cycle power generation technology is an advanced power system that combines coal gasification technology and high-efficiency combined cycle, which can not only improve the energy conversion efficiency of traditional power generation technology, but also reduce the pollution of gas pollutants to the environment; solid fuel cells technology; biomass gasification power generation technology can not only solve the effective use of renewable energy, but also solve the environmental pollution of various organic wastes. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/28B01J20/02B01J20/30B01J20/32B01D53/02
CPCB01D53/02B01D2253/112B01D2257/304B01J20/0296B01J20/28047B01J20/28057B01J20/3064B01J20/3078B01J20/32B01J20/3204
Inventor 苏胜李海峰向军刘利军许凯尹子骏胡松汪一江龙
Owner HUAZHONG UNIV OF SCI & TECH
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