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High-temperature gas composite oxide desulfurizer and production thereof

A technology of composite oxides and desulfurizers, applied in the catalytic conversion of impurities, gas purification, etc., can solve the problems of desulfurization performance and mechanical strength attenuation, affecting the service life of desulfurizers, etc., and achieve the effect of high wear resistance

Inactive Publication Date: 2005-12-28
CHINA COAL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

All of the above desulfurizers have high sulfur capacity, but the desulfurization performance and mechanical strength of the desulfurizer will be attenuated during long-term use, which will affect the service life of the desulfurizer
The above desulfurizers are only suitable for use in fixed bed reactors

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] No. 1 desulfurizer is composed of the following components: 35% of zinc oxide, 51% of titanium dioxide, 4.0% of nickel oxide, 2.5% of aluminum oxide, 5.5% of inorganic binder (bentonite, kaolin, clay, etc.), organic binder Binder (cellulose, polyvinyl alcohol and starch, etc.) 2.0%, etc.;

[0019]The components of No. 2 desulfurizer are: zinc oxide 37%, titanium dioxide 36%, copper oxide 10%, manganese dioxide 6.5%, aluminum oxide 1.5%, chromium oxide 2.0%, inorganic binder (including phosphoric acid) 6.0 %, organic binder 1.0%, etc.;

[0020] The components of No. 3 desulfurizer are: 50% zinc oxide, 33% titanium dioxide, 4.5% nickel oxide, 4.0% aluminum oxide, 2.5% chromium oxide, 4.5% inorganic binder, 1.5% organic binder, etc.;

[0021] The components of No. 4 desulfurizer are: 44% zinc oxide, 42% titanium dioxide, 4.0% nickel oxide, 1.5% aluminum oxide, 1.5% chromium oxide, 3.5% inorganic binder, 3.5% organic binder, etc.;

[0022] The composition of No. 5 desulfu...

Embodiment 2

[0025] According to the ratio of No. 1 and No. 2 desulfurizers, 10 kg of desulfurizers for entrained bed desulfurization were prepared according to the aforementioned preparation method. First, mix and grind the prepared materials to disperse the components evenly, then add water for kneading, and use an extruder to make a cylindrical shape with a diameter of φ2~5mm. Drying at high temperature for 8 hours, the molded product is made into 200-500 μm particles, and No. 1 desulfurizer is roasted at 1000 ° C for 6 hours. No. 2 desulfurizer was roasted at 960°C for 8 hours.

[0026] Element

H 2

CO

CO 2

CH 4

C 2 h 4

C 2 h 6

N 2

O 2

％

40.9

24.8

30.4

2.6

0.02

0.03

0.9

0.09

[0027] H into the reactor gas 2 The S content is 14~21g / m3, the reactor outlet H 2 The S content is 0-10 mg / m3. The results of 17 times of desulfurization are shown in Table 1.

[0028...

example 3

[0032] According to the ratio of No. 3 and No. 4 desulfurizing agents, the roasting temperature of No. 3 desulfurizing agents during preparation is 940° C., and the roasting time is 6 hours. The roasting temperature of No. 4 desulfurizer is 1020°C for 8 hours, and the particle size of the finished product is φ4.5mm×5~10mm. The rest of the process is the same as the preparation of desulfurizer in Example 2.

[0033] The prepared desulfurizer was tested with real gas in a miniature high temperature and normal pressure packed bed reactor. The composition of the gas: H 2 32.45~44.3%, CO 25.88~36.06%, CO 2 22.8~41.2%, O 2 0.29~1.30%, CH 4 1.23~3.01%, N 2 0.462~5.41%, H in gas 2 S content up to 10g / m 3 , and regenerated with a mixed gas containing 50% steam, nitrogen and 3-6% oxygen. Four desulfurization / regeneration tests were carried out for the above two desulfurizers at a space velocity of 3000 / h and a temperature of 500°C, 550°C, 600°C and 650°C. The results show tha...

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Abstract

A high-temperature gas composite oxide desulfurizer and its production are disclosed. The desulfurizer consists of active component zinc oxide 33í½50% and multiple additives 31í½51% which comprises titanium dioxide, active stabilizer, surface modifier, strength reinforcer, regenerative improver and composite binder. The process is carried out by mixing active component with additives, grinding, kneading, forming, laying aside, drying, particle rectifying, calcining at 850í½1060íÒC in high-temperature furnace, and obtaining desulfurizer. It achieves better reactivity and efficiency, good abrasion resistance and regeneration. It can be used for fixed bed, fluidized bed and desulfurizing reactor of flowing bed.

Description

Technical field: [0001] The desulfurizing agent and preparation process involved in the invention belong to the fields of gas purification and desulfurizing agent preparation. Background technique: [0002] Coal is the conventional energy resource with the largest reserves and the widest distribution in the world. It accounts for 66.8% of the total fossil resources, 26.9% of the primary energy consumption, and 45% of the world's power generation. Coal derivatives produce more than 25,000 consumer and industrial products, and occupy an important position in the world economy. Coal is still the main energy source and important chemical raw material resource identified in the world. Calculated by heat, coal accounts for about 90% of the total reserves of all combustible minerals, which is enough for human use for thousands of years according to the world's current consumption level. In the long run, coal is reliable as the main energy and raw material resource. my country is ...

Claims

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Application Information

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IPC IPC(8): C10K1/34
Inventor 应幼菊步学朋戢绪国邓一英王鹏张翠清文芳边文忻仕河巩志坚彭万旺李文华徐振刚刘玉华杜铭华
Owner CHINA COAL RES INST
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