Catalyst for Claus tail gas hydrohydrolysis and preparation method and application thereof

A Claus tail gas and catalyst technology, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc., can solve the problem of low hydrolysis rate of organic sulfides

Active Publication Date: 2021-03-30
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the above-mentioned catalyst is used as a catalyst for low-temperature hydrohydrolysis reaction, the hydrolysis rate of organic sulfide is low, only 80% to 85%.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0030] In the second aspect, the embodiments of the present invention provide a method for preparing the above-mentioned catalyst, which specifically includes the following steps:

[0031] Step 1, immersing the dried activated alumina in the first solution containing cobalt and cesium for the first preset time, taking it out from the first solution and drying it, and then roasting at 450°C to 520°C to obtain the loaded Activated alumina of cobalt oxide and cerium oxide;

[0032] Step 2, and then immerse the activated alumina loaded with cobalt oxide and cesium oxide in the second solution containing molybdenum for a second preset time, take it out from the second solution and dry it at 500°C to 550°C Roasting, that is, the catalyst.

[0033] Further, as preferred, the above-mentioned first solution can be a mixed aqueous solution of cobalt nitrate and cesium nitrate, wherein the concentration of cobalt nitrate can be 260g / L~280g / L (such as 260g / L, 265g / L, 270g / L, 275g / L, 280...

Embodiment 1

[0045] This embodiment provides a catalyst suitable for hydrohydrolysis of low-temperature Claus tail gas. The catalyst is supported by activated alumina, and cobalt oxide, cesium oxide and molybdenum oxide are loaded on the activated alumina.

[0046] In this embodiment, the above-mentioned catalyst is prepared from the activated alumina product produced by Aluminum Corporation of China (hereinafter referred to as Chinalco), wherein the specific surface of the activated alumina is 293m 2 / g, the pore volume is 0.44ml / g, and the average crushing strength is 195N / piece. The specific preparation method is as follows:

[0047] Step 101, drying 100 g of the above-mentioned activated alumina at 110° C. for 2 hours, and preparing 1000 ml of a mixed aqueous solution of cobalt nitrate and cesium nitrate, wherein 1000 ml of a mixed solution with a concentration of cobalt nitrate of 265 g / L and a concentration of cesium nitrate of 144 g / L , and 1000ml of ammonium molybdate aqueous solu...

Embodiment 2

[0053] This embodiment provides a catalyst suitable for hydrohydrolysis of low-temperature Claus tail gas. The catalyst is supported by activated alumina, and cobalt oxide, cesium oxide and molybdenum oxide are loaded on the activated alumina.

[0054] In this embodiment, the above-mentioned catalyst is prepared by using the activated alumina product produced by Aluminum Corporation of China (hereinafter referred to as Chinalco) as the raw material, wherein the specific surface of the activated alumina is 284m 2 / g, the pore volume is 0.43ml / g, and the average crushing strength is 177N / piece. The specific preparation method is as follows:

[0055] Step 201, drying 100 g of the above-mentioned activated alumina at 110° C. for 2 hours, and preparing 1000 ml of a mixed aqueous solution of cobalt nitrate and cesium nitrate, wherein 1000 ml of a mixed solution with a concentration of cobalt nitrate of 262 g / L and a concentration of cesium nitrate of 145 g / L , and 1000ml of ammoniu...

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Abstract

The invention discloses a catalyst for hydrogenation hydrolysis of Claus tail gas, a preparation method and applications thereof, and belongs to the technical field of Claus tail gas treatment. The catalyst uses active alumina as a carrier, wherein cobalt oxide, cesium oxide and molybdenum oxide are supported on the active alumina, the active alumina accounts for 77-85% of the total weight of thecatalyst, the cobalt oxide accounts for 3-4% of the total weight of the catalyst, the cesium oxide accounts for 0.5-1.0% of the total weight of the catalyst, and the molybdenum oxide accounts for 12-18% of the total weight of the catalyst. According to the present invention, under the premise of the ensuring of the high hydrogenation conversion rate of sulfur dioxide, the disadvantage of the pooractivity of the hydrolysis on organic sulfur at the low temperature through the existing catalyst is overcome, and the hydrolysis on organic sulfur is increased so as to reduce the emission concentration of sulfur dioxide and meet the national standard requirement.

Description

technical field [0001] The invention relates to the technical field of Claus tail gas treatment, in particular to a catalyst for hydrohydrolysis of Claus tail gas and its preparation method and application. Background technique [0002] Hydrogen sulfide gas is produced during the production, processing, storage and transportation of petroleum and natural gas. Gas containing hydrogen sulfide is harmful to the human body and the environment, so it is necessary to treat the gas containing hydrogen sulfide. The Claus method is currently one of the main methods for dealing with hydrogen sulfide gas. The hydrogen sulfide in the hydrogen sulfide-containing gas can be converted into sulfur by the Claus method, and the conversion rate is 93% to 97%. However, the tail gas produced by the Claus method (hereinafter referred to as the Claus tail gas) will contain 0.5% to 2% of sulfides (including sulfur dioxide and organic sulfides). In order to protect the environment and reduce pollu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/887B01D53/88B01D53/50B01D53/48B01D53/76
CPCB01D53/8603B01D53/8609B01D53/88B01D2251/202B01D2257/306B01D2258/02B01D2259/122B01J23/002B01J23/8872B01J2523/00B01J2523/15B01J2523/31B01J2523/68B01J2523/845
Inventor 陈昌介何金龙温崇荣常宏岗熊钢
Owner PETROCHINA CO LTD
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