RE sulfide catalyst for hydrolysis of carbonyl sulfide and its prepn

A technology for hydrolyzing catalysts and rare earth oxides, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc. Low-level problems, to achieve the effect of large operating flexibility, good sulfur resistance, and high activity

Inactive Publication Date: 2003-03-19
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] US Patent 4,455,446 discloses a γ-Al 2 o 3 The COS hydrolysis catalyst loaded with platinum sulfide has the disadvantage of high catalyst cost and the need for periodic regeneration
[0005] Chinese patent CN 1069673 discloses a normal temperature organosulfur hydrolysis catalyst, which is made of spherical γ-Al 2 o 3 2-5% K on load 2 CO 3 , the disadvantage of this catalyst is that the COS content and space velocity of the feed gas are relatively low, respectively 1-5mg/m 3 and 2,000hr -1
[0007] Chinese patent CN 1134312 discloses a kind of by 4-20wt% TiO 2 and γ-Al 2 o 3 Composed of organosulfur hydrolysis catalysts, the disadvantage of this catalyst is that the space velocity is only 1,800hr -1
[0008] Chinese p

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Weigh La 2 o 3 Add 100ml of deionized water to 10g of the sample, heat it under boiling conditions for 2 hours, then dry at 110°C for 24 hours, press into tablets and sieve to obtain 40-60 mesh hydrated lanthanum oxide;

[0025] (2) Install the hydrated lanthanum oxide in a fixed-bed quartz reactor (Φ8×300mm), and use 2% SO at 550°C 2 / 1%CO / N 2 Gas activation of 0.5 hours, to obtain La 2 o 2 S;

[0026] (3) In the reactor described in (2), at a temperature of 100°C and a space velocity of 10,000hr -1 , under the condition of COS content 150ppm, the conversion rate of COS is 90.2%.

Embodiment 2

[0028] Get the La prepared by embodiment 1 2 o 2 S, at a temperature of 200°C and a space velocity of 5,000-20,000hr -1 , COS conversion rate is shown in Table 1 under the condition of COS content 150ppm:

[0029] Table 1 Airspeed versus La 2 o 2 Effect of S catalyst on COS hydrolysis activity

[0030] Airspeed, hr -1 5,000 10,000 15,000 20,000

[0031] COS conversion rate, % 98.9 98.7 98.0 91.6

Embodiment 3

[0033] Get the La prepared by embodiment 1 2 o 2 S, at a temperature of 150°C and a space velocity of 5,000hr -1 , COS conversion rate 91.4% under the condition of COS content 300ppm.

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PUM

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Abstract

The RE oxysulfide catalyst has the chemical expression of Re2O2S, where Re is La, Ce, Pr, Nd, Sm, Eu, Gd, Dy, Ho and Er. The preparation process of the catalyst includes hydrolysis of RE oxide and activation with the mixed gas of SO2 and CO at 400-700 deg.c. The catalyst has excellent hydrolysis effect on COS and other organic sulfide, certain sulfate resistance and oxygen poison resistance, and under the reaction condition including temperature 100-250 deg.c, COS content 150-300 ppm, space velocity 5,000-10,000/Hr it results in a COS conversion rate higher than 90%.

Description

technical field [0001] The invention belongs to a catalyst for removing organic sulfur, in particular to a carbonyl sulfide hydrolysis catalyst and a preparation method thereof. Background technique [0002] Carbonyl sulfide (COS) widely exists in the chemical production process using coal, natural gas and petroleum as raw materials. Its existence not only pollutes the environment, but also causes catalyst poisoning, equipment corrosion and product quality degradation in the subsequent production process. COS hydrolysis is the most practical method for removing organic sulfur, and its process is: <chemistry num="001"> <chem file="02137242_cml001.xml" / > < / chemistry> , under the action of a hydrolysis catalyst, use the water vapor in the tail gas or raw gas to convert COS into easier-to-handle inorganic hydrogen sulfide, and finally recover the sulfur element in the form of sulfur. [0003] U.S. Patent No. 4,455,446 discloses a γ-Al 2 o 3 The disadvanta...

Claims

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Application Information

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IPC IPC(8): B01J27/04
Inventor 马建新张益群肖忠斌周伟邬敏忠
Owner EAST CHINA UNIV OF SCI & TECH
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