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Anti-pulverization medium-high temperature coal gas zinc ferrite desulfurizer and preparation thereof

A technology of zinc ferrite and desulfurization agent, applied in the field of desulfurization agent research and preparation, can solve the problem of insufficient attention and achieve the effect of strong anti-pulverization ability and high desulfurization efficiency

Inactive Publication Date: 2009-05-27
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Relevant research institutes in the United States once conducted technical evaluations on the purification section, and believed that medium-temperature purification is beneficial in terms of technology and economy, but did not attract enough attention. It was not until the recent stage that research on gas desulfurizers and their processes under medium-temperature conditions began.

Method used

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  • Anti-pulverization medium-high temperature coal gas zinc ferrite desulfurizer and preparation thereof
  • Anti-pulverization medium-high temperature coal gas zinc ferrite desulfurizer and preparation thereof
  • Anti-pulverization medium-high temperature coal gas zinc ferrite desulfurizer and preparation thereof

Examples

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Effect test

example 1

[0043] Example 1: First, use iron and zinc nitrate saturated solution and ammonia water to carry out co-precipitation under the conditions of pH = 9 and precipitation temperature 40°C, then filter and wash, dry at 100°C for 3 hours, and finally reduce the roasting temperature The temperature is controlled at 600° C., and the roasting time is 1.5 hours to prepare the active component of zinc ferrite. Mix 195g of active component zinc ferrite, 90g of kaolin, 18g of pore-forming agent methylcellulose, and 0.3g of lubricant graphite, knead with water, extrude into a column shape of 2-4mm at room temperature, and dry in the shade at room temperature For 24 hours, dry at 150°C for 4 hours, and finally control the roasting temperature at 750°C for 4 hours to obtain the finished zinc ferrite desulfurizer. At a reaction temperature of 400°C and a space velocity of 2000h -1 , the imported hydrogen sulfide concentration is 2000ppm, and the activity evaluation is carried out under the si...

Embodiment approach 2

[0044] Embodiment 2: Firstly, use a saturated solution of nitrate of iron and zinc and ammonia water to carry out co-precipitation under the conditions of pH = 10 and precipitation temperature of 50°C, then filter and wash, dry at 150°C for 4 hours, and finally roast The temperature is controlled at 700° C., and the roasting time is 2 hours to prepare the zinc ferrite active component. Mix 180g of active component zinc ferrite, 90g of bentonite, 36g of pore-forming agent starch, and 0.25g of lubricant, knead with water, extrude into a column shape of 2-4mm at room temperature, and dry in the shade at room temperature for 36 hours. ℃ for 4 hours, and finally control the calcination temperature at 750 ℃ ​​for 4 hours to obtain the finished zinc ferrite desulfurizer. At a reaction temperature of 400°C and a space velocity of 2000h -1 , the imported hydrogen sulfide concentration is 2500ppm, and the activity evaluation is carried out under the simulated Texicao atmosphere. The de...

Embodiment approach 3

[0045] Embodiment 3: Firstly, use a saturated solution of nitrate of iron and zinc and ammonia water to carry out co-precipitation under the conditions of pH=9 and precipitation temperature of 55°C, then filter and wash, dry at 180°C for 4 hours, and finally roast The temperature is controlled at 700° C., and the roasting time is 2 hours to prepare the zinc ferrite active component. Mix 180g of active component zinc ferrite, 90g of brick and tile soil, 18g of pore-forming agent carboxyethyl cellulose, and 0.3g of lubricant graphite, knead with water, extrude into a column shape of 2-4mm at room temperature, and Dry in the shade for 36 hours, dry at 150°C for 4 hours, and finally control the roasting temperature at 750°C for 4 hours to obtain the finished zinc ferrite desulfurizer. At a reaction temperature of 400°C and a space velocity of 2000h -1 , the imported hydrogen sulfide concentration is 2000ppm, and the activity evaluation is carried out under the simulated Texicao a...

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Abstract

The invention relates to a high-temperature coal gas anti-chalking zinc ferrite desulfurizer, which belongs to the field of desulfurizer preparation. The desulfurizer consists of active components including 50 to 65 percent of zinc ferrite, 15 to 30 percent of clay addition agent, 6 to 12 percent of pore-forming material and the like. The active component zinc ferrite of the desulfurizer is prepared by adopting a coprecipitation method and is then added with a caking agent through the steps of grinding, mixing, extruding, high temperature calcinations and the like. The desulfurizer adapts to a fixed bed reactor at a desulfurization temperature of between 350 and 600 DEG C, and can be applied to key technology for integrated coal gasification combined cycle power generation and coal gasification fuel cell in the field of high-temperature gas purification and the field of feed gas desulfurization purification.

Description

1. Technical field [0001] The invention discloses a zinc ferrite desulfurizer that resists pulverization of high-temperature gas and its preparation, and belongs to the field of research and preparation of desulfurizers, and in particular relates to a desulfurizer for removing hydrogen sulfide and a preparation method thereof. 2. Background technology [0002] The emerging gas integrated combined cycle power generation (IGCC) technology is the most promising clean coal utilization technology in the 21st century. It is expected to increase the thermal efficiency of the entire power generation system to about 52% in 2010 and is environmentally friendly. . Among them, thermal desulfurization of high-temperature gas is one of the key technologies of IGCC. [0003] In the past few years, the research and development of high-temperature gas desulfurizers have gradually shifted from single metal oxides to composite metal oxides. Among them, the zinc ferrite desulfurizer has the ad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10K1/34
Inventor 梁美生康文凯刘玉香李春虎谢克昌
Owner TAIYUAN UNIV OF TECH
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