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Catalyst for hydrolysis of carbonyl sulfide as well as preparation method and application thereof

A catalyst, carbonyl sulfide technology, applied in the field of carbonyl sulfide hydrolysis catalyst and its preparation, can solve the problem of low removal rate, achieve the effect of low applicable temperature, excellent hydrolysis ability, and high resistance to sulfation

Inactive Publication Date: 2016-10-19
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The catalyst provided by the prior art is suitable for removing carbonyl sulfide whose concentration is lower than 300ppm, and when used for the removal of high-concentration carbonyl sulfide, its removal rate is low

Method used

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preparation example Construction

[0032] In the second aspect, the embodiment of the present invention provides a method for preparing the above-mentioned catalyst, comprising: preparing an aqueous solution with a concentration of 7-15% of the active component, and then impregnating the carrier in the active component at 20-25°C In the divided aqueous solution for 2-4 hours, the active component is loaded on the carrier, then dried at 120-150°C for 3-5 hours, and finally roasted at 450-500°C to obtain the desired catalyst;

[0033] Wherein, in the prepared catalyst, the weight of the active component is 5-10% of the weight of the catalyst.

[0034] It can be understood that in this preparation method, the carrier used is selected from the group with a particle size of 4-6mm, a pore volume of 0.35-0.45ml / g, and a specific surface area of ​​300-350m 2 / g of activated alumina and / or activated titanium oxide. The active components used are selected from at least one of the oxides of alkali metals, alkaline earth ...

Embodiment 1

[0049] This embodiment provides a catalyst for the hydrolysis of carbonyl sulfide in natural gas, the catalyst comprising 93% (weight percent) activated alumina and 7% (weight percent) yttrium oxide supported on the activated alumina. Among them, the particle size of activated alumina is 5mm, the pore volume is 0.4ml / g, and the specific surface area is 300m 2 / g.

[0050] The preparation method of this catalyst is as follows:

[0051] Prepare an aqueous solution of yttrium oxide with a concentration of 10%, and then immerse activated alumina in the aqueous solution of yttrium oxide at 25°C for 3 hours to load yttrium oxide on the activated alumina, and then dry it at 135°C It was treated for 3.5 hours, and finally calcined at 450° C. to obtain the desired catalyst.

Embodiment 2

[0053] This embodiment provides a catalyst for the hydrolysis of carbonyl sulfide in natural gas, the catalyst includes 92% (weight percent) active titanium oxide and 8% (weight percent) rubidium oxide supported on the active titanium oxide. Among them, the particle size of activated titanium oxide is 4mm, the pore volume is 0.35ml / g, and the specific surface area is 250m 2 / g.

[0054] The preparation method of this catalyst is as follows:

[0055] Prepare an aqueous solution of rubidium oxide with a concentration of 12%, and then immerse the active titanium oxide in the aqueous solution of rubidium oxide at 22°C for 3 hours to load the rubidium oxide on the active titanium oxide, and then dry it at 130°C It was treated for 4 hours, and finally calcined at 500° C. to obtain the desired catalyst.

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Abstract

The invention discloses a catalyst for hydrolysis of carbonyl sulfide as well as a preparation method and an application thereof, and belongs to the field of natural gas purification. The catalyst comprises a carrier and an active component which is loaded on the carrier; the carrier is active aluminum oxide and / or active titanium oxide; the active component comprises at least one of oxide of alkali metal, oxide of alkaline earth metal, and oxide of rare earth metal; the weight of the active component accounts for 5-10% of the weight of the catalyst; particle sizes of active aluminum oxide and active titanium oxide are 4-6mm, pore volumes are 0.35-0.45ml / g, and specific surface areas are 300-350m<2> / g. The catalyst has the advantages of good gas source adaptability, high sulfation resisting capability, low applicable temperature, excellent hydrolysis capability for carbonyl sulfide whose concentration is 100-4000ppm, and removal rate of carbonyl sulfide reaches 97% or above.

Description

technical field [0001] The invention relates to the field of natural gas purification, in particular to a catalyst for hydrolysis of carbonyl sulfide, a preparation method and application thereof. Background technique [0002] With the development of natural gas exploration in China, more and more high-sulfur gas fields are being developed, such as the Luojiazhai, Tieshanpo, Dukouhe and other gas fields in the Sichuan-Chongqing area, which have large geological reserves, good reservoir characteristics, single well It has high output and good development prospects, and is an important reserve resource for the Sichuan-East Gas Pipeline and new gas supply to the Sichuan-Chongqing region. However, it has been proved that these gas fields not only contain higher H 2 S (up to 15.83%) and CO 2 (up to 10.53%), it also contains higher carbonyl sulfide (COS), carbon disulfide (CS 2 ), mercaptans and other organic sulfurs, these organic sulfurs are likely to cause equipment corrosio...

Claims

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Application Information

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IPC IPC(8): B01J23/10B01J23/02B01J23/04B01J21/10B01D53/86B01D53/48C10L3/10
Inventor 刘宗社陈昌介何金龙温崇荣黄黎明
Owner PETROCHINA CO LTD
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