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Aluminum trioxide sulfur recovery catalyst resistant to sulfation and preparation method thereof

A technology for the recovery of alumina trioxide and sulfur, which can be used in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., and can solve the problems of low efficiency of de-oxygenation reaction , to achieve the effect of improving redox reaction process, improving catalytic efficiency and improving service life

Active Publication Date: 2016-05-11
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the concentration of "oxygen leakage" in the Claus reactor is usually lower than 1%, making the de-"oxygen leakage" reaction less efficient

Method used

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  • Aluminum trioxide sulfur recovery catalyst resistant to sulfation and preparation method thereof
  • Aluminum trioxide sulfur recovery catalyst resistant to sulfation and preparation method thereof

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preparation example Construction

[0013] According to the present invention, the preparation method of above-mentioned catalyst comprises steps as follows:

[0014] (1) Ultrasonic dispersion of graphene in water, adding pseudo-boehmite and mixing evenly;

[0015] (2) with the material that step (1) obtains, add MnO 2 or CuO, knead evenly and dry;

[0016] (3) immersing the dried material obtained in step (2) in an iron salt solution for 1-15 hours, and drying again after the immersion is completed;

[0017] (4) The dried material in step (3) is kept at 450-550° C. for 3-6 hours at a constant temperature to obtain the finished catalyst.

[0018] According to the present invention, preferably, the mass ratio of graphene and pseudo-boehmite described in step (1) is (1-10):125, more preferably (3-8):125.

[0019] According to the present invention, preferably, MnO in step (2) 2 Or the mass ratio of CuO to pseudo-boehmite in step (1) is (1-8):125, more preferably (2-6):125.

[0020] According to the present in...

Embodiment 1

[0029] Take graphene 5g, join in 100mL water, ultrasonic dispersion is uniform, then weigh 125g pseudo-boehmite (water content 24.5%), join in above-mentioned graphene aqueous solution, after stirring, join in extruder, Add 3g MnO 2 Continue kneading for 1 hour, then extrude into a φ3mm strip, put it into an oven for 110°C×12h to dry; weigh 10g of ferric nitrate nonahydrate (Fe(NO 3 ) 3 9H 2 (0), add 100mL of water to dissolve, impregnate the strip sample at room temperature for 12h, dry at 110°C for 12h, and roast at 500°C for 4h at a heating rate of 15°C / min to obtain catalyst sample A. The specific surface area of ​​the sample is 276m 2 / g, the average crushing strength is 292N / cm.

Embodiment 2

[0031] Take graphene 5g, join in 100mL water, ultrasonic dispersion is uniform, then weigh 125g pseudo-boehmite (water content 24.5%), join in above-mentioned graphene aqueous solution, after stirring, join in extruder, Add 3g MnO 2 Continue kneading for 1 hour, then extrude into strips of φ3mm, put into an oven at 110°C×12h for drying; weigh 15g of ferric nitrate nonahydrate (Fe(NO 3 ) 3 9H 2 (0), after adding 100mL of water to dissolve, impregnate the strip sample treated with graphene at room temperature for 12h, dry at 110°C for 12h, and roast at 500°C for 4h at a heating rate of 15°C / min to obtain catalyst sample B. The specific surface area of ​​the sample is 267m 2 / g, the average crushing strength is 290N / cm.

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Abstract

The invention relates to an aluminum trioxide sulfur recovery catalyst resistant to sulfation and a preparation method thereof. The catalyst is composed of the following components in percentage by weight: 75 to 90% of active aluminum trioxide, 1 to 10% of graphene, 1 to 8% of Fe2O3, and 0.5 to 7% of R oxide, wherein the R oxide represents MnO2 or CuO. The invention also provides a preparation method of the catalyst. Compared with the common alumina catalyst, the provided catalyst is resistant to poisoning caused by sulfation in the presence of trace O2 and SO2 and overcomes the shortage that active aluminum (III) trioxide is inactivated easily by hydrothermal sintering.

Description

technical field [0001] The invention relates to a sulfate-resistant alumina sulfur recovery catalyst and a preparation method thereof, in particular to a sulfur recovery catalyst with high Claus reaction activity and long life and a preparation method thereof. Background technique [0002] Sulfur recovery catalysts are mainly used to make H produced during fossil fuel processing 2 S is transformed into non-toxic and safe elemental sulfur. A large amount of H is produced during the processing of oil, natural gas and coal coking 2 S gas, in order to protect the environment and recover sulfur, the Claus process is widely used in industry to treat H 2 The acid gas of S protects the atmospheric environment, and its main process includes: H in acid gas 2 S is partially oxidized to SO in the combustion furnace 2 , SO 2 with remaining H 2 S reacts to form elemental sulfur; unreacted H 2 S and SO 2 Enter the subsequent Claus reactor to continue the reaction. The main reaction...

Claims

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Application Information

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IPC IPC(8): B01J23/889B01J23/745B01J35/10
CPCB01J23/002B01J23/745B01J23/8892B01J2523/00B01J35/615B01J2523/31B01J2523/842B01J2523/72B01J2523/17
Inventor 张文郁王玉节冷军晓
Owner QILU UNIV OF TECH
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