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Method for treating Claus process tail gas by adopting modified adsorbing agent

A technology of Claus tail gas and process tail gas, which is applied in the field of treating Claus process tail gas with modified adsorbent, can solve the problem of single sulfur component removal, and achieve the effect of reducing energy consumption and device cost

Active Publication Date: 2015-03-18
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For Claus tail gas containing H 2 S, COS, CS 2 , sulfur steam and many other gases are not involved, the removal of sulfur components is single, and the removal of multi-component sulfur species in Claus tail gas is not involved

Method used

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  • Method for treating Claus process tail gas by adopting modified adsorbing agent
  • Method for treating Claus process tail gas by adopting modified adsorbing agent
  • Method for treating Claus process tail gas by adopting modified adsorbing agent

Examples

Experimental program
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Effect test

Embodiment 1

[0041] H in the Claus tail gas of this embodiment 2 The volume concentration of S gas is 2%, SO 2 The gas volume concentration is 1%, the COS gas volume concentration is 1000ppm, and the CS 2 The gas volume concentration is 1000ppm. The volume ratio of oxygen to sulfide in the mixed gas is 2, the volume of water vapor accounts for 10% of the total volume of the mixed gas, and the rest is N 2 .

[0042] Coconut shell activated carbon was immersed in 5% Cu(NO 3 ) 2 In the solution, stand still for 2-24 hours, filter and dry at 150°C for 2-6 hours, and then roast at 200-850°C for 2-5 hours under inert gas to obtain the modified adsorbent. The Claus exhaust gas is mixed with air or oxygen to form a mixture. Put 3.63g of the modified adsorbent into the adsorption bed, pass the mixed gas into the adsorption bed, the operating temperature of the adsorption bed is 60°C, the internal pressure of the adsorption bed is 0.1Mpa, and the space velocity of the mixed gas entering th...

Embodiment 2

[0044] H in the Claus tail gas of this embodiment 2 The volume concentration of S gas is 2%, SO 2 The gas volume concentration is 1%, the COS gas volume concentration is 1000ppm, and the CS 2 The gas volume concentration is 1000ppm. The volume ratio of oxygen to sulfide in the mixed gas is 2, the volume of water vapor accounts for 10% of the total volume of the mixed gas, and the rest is N 2 .

[0045] Immerse the ZSM-5 molecular sieve into Fe(NO 3 ) 3 and a mass concentration of 2.5% Ni (CH 3 COO) 2 In the mixed solution, stand still for 2-24 hours, filter and dry at 150°C for 2-6 hours, and then roast at 200-850°C for 2-5 hours under inert gas to obtain the modified adsorbent. The Claus exhaust gas is mixed with air or oxygen to form a mixture. Put 3.63g of the modified adsorbent into the adsorption bed, pass the mixed gas into the adsorption bed, the operating temperature of the adsorption bed is 60°C, the internal pressure of the adsorption bed is 0.1Mpa, and t...

Embodiment 3

[0047] H in the Claus tail gas of this embodiment 2 The volume concentration of S gas is 2%, SO 2 The gas volume concentration is 1%, the COS gas volume concentration is 1000ppm, and the CS 2 The gas volume concentration is 1000ppm. The volume ratio of oxygen to sulfide in the mixed gas is 6, the volume of water vapor accounts for 50% of the total volume of the mixed gas, and the rest is N 2 .

[0048] The SBA-15 mesoporous molecular sieve was immersed in 5% Cu(NO 3 ) 2 In the solution, stand still for 2-24 hours, filter and dry at 150°C for 2-6 hours, and then roast at 200-850°C for 2-5 hours under inert gas to obtain the modified adsorbent. The Claus exhaust gas is mixed with air or oxygen to form a mixture. Put 3.63g of the modified adsorbent into the adsorption bed, and pass the mixed gas into the adsorption bed. The operating temperature of the adsorption bed is 160°C, the internal pressure of the adsorption bed is 1Mpa, and the space velocity of the mixed gas e...

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Abstract

The invention relates to a method for treating a Claus process tail gas by adopting a modified adsorbing agent. The method comprises the following steps: (1) immersing an adsorbing agent in a 1-10% metal ion solution, standing, drying after filtering to obtain a modified adsorbing agent; (2) placing the modified adsorbing agent in an adsorbing bed for removing sulfide in the Claus process tail gas; and (3) after the adsorbing agent in the adsorbing bed reaches adsorption saturation, performing regeneration by adopting hot airflow with a temperature of 150-500 DEG C, wherein the regenerated adsorbing agent can be recycled. According to the method, the sulfide in the tail gas of a Claus device is removed by adopting an adsorption-catalysis method, the modified adsorbing agent can be used for simultaneously treating H2S, SO2, COS and CS2 in the Claus process tail gas and recovering the H2S, the SO2, the COS and the CS2 in the Claus process tail gas in a sulphur or sulfuric acid form, and the adsorbing agent reaching the adsorption saturation can be regenerated and recycled.

Description

technical field [0001] The invention relates to a recovery process of sulfide in the tail gas of the Claus process, and adopts a modified solid catalyst to reduce the H in the tail gas 2 S, SO 2 、CS 2 , COS for adsorption and catalytic recovery to form sulfur or sulfuric acid, this method is especially suitable for refinery gas and natural gas. Background technique [0002] In 1883 Carl Friedrich Claus invented the H 2 S oxidation sulfur production method, in the 1930s, the German Farben improved the Claus process, firstly, 1 / 3 of the H in the raw gas 2 S is converted to SO at a temperature of 1200°C 2 , such as the reaction equation (1), then the SO obtained by the reaction 2 and H 2 S is converted into liquid sulfur for recycling under the action of the catalyst, as shown in Reaction Equation 2. [0003] (1) [0004] (2) [0005] At present, the Claus process is widely used in oil refining, natural gas, fertilizer and coal gasification plants due to its adva...

Claims

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Application Information

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IPC IPC(8): B01D53/86B01D53/52B01D53/50B01D53/48
Inventor 崔群钱中坚王海燕樊继利赵桥坡侯春健
Owner CHINA PETROLEUM & CHEM CORP
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