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Method for selectively removing H2S from gas mixture containing CO2

A gas mixture, selective technology, used in separation methods, combustible gas purification, chemical instruments and methods, etc.

Active Publication Date: 2013-03-27
SINOPEC NANJING RES INST OF CHEM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] In the prior art, there have been reports on the use of hypergravity devices for gas absorption, but no reports on selective desulfurization

Method used

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  • Method for selectively removing H2S from gas mixture containing CO2

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Implementation example one: containing H 2 S1%, CO 2 10%, N 2 89%, after the mixed gas is metered, it enters the absorption tube equipped with the liquid to be evaluated, and absorbs it by bubbling at 40°C. The liquid was analyzed by liquid phase. The selectivity S is calculated by the following formula:

[0022] S = [ H 2 S ] 1 [ C O 2 ] g [ H 2 S ] g [ ...

Embodiment 2

[0028] Implementation Example 2: The composition is CO 2 36%, H 2 46%, CO 17%, H 2 S 3.6g / Nm 3 The shift gas 52000Nm 3 / h, using the absorption liquid desulfurization of the present invention in the absorption tower, the CO after desulfurization 2 19.2%, H 2 S40mg / Nm 3 .

Embodiment 3

[0029] Implementation Example 3: The composition is CO 2 36%, H 2 46%, CO 17%, H 2 S 3.6g / Nm 3 The shift gas 64000Nm 3 / h, using the absorption liquid desulfurization of the present invention in the supergravity rotating bed, the CO after desulfurization 2 24.1%, H 2 S11mg / Nm 3 .

[0030] The above results show that: adopting the method of the present invention, the desulfurization selectivity is high and the processing capacity is large.

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Abstract

The invention belongs to the technical field of gas separation, which relates to a method for selectively removing H2S from a gas mixture containing CO2. A compound aqueous ammonia solution with high desulfurization selectivity is used as an absorbant, a hypergravity rotating bed is used as the absorption equipment, then H2S is selectively removed from the air flow containing the CO2, and the absorbant can be reproduced and recycled. Compared with the conventional amine method, the invention has higher desulfurization selectivity and large treatment capability.

Description

Technical field: [0001] The invention belongs to the technical field of gas separation, in particular to a 2 Selective removal of H from a gas mixture 2 S solvent. Background technique: [0002] Raw material gas (such as catalytic dry gas, coking dry gas, cracked gas, liquefied gas, etc.), water gas, synthesis gas, coke oven gas and some natural gas and other industrial gases of petroleum and its processing industry contain a certain amount of H 2 S, H 2 S is a highly toxic, colorless flammable gas. Its existence not only seriously threatens personal safety, but also causes corrosion of equipment and pipelines. It can also poison catalysts in many production processes, which must be eliminated or controlled. pollutants. [0003] H in industrial gases 2 S is usually associated with CO 2 Existing at the same time, although both are acidic, CO 2 It has a certain chemical inertness, and generally does not need to be removed unless it is required by the subsequent process....

Claims

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Application Information

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IPC IPC(8): B01D53/14C10K1/14C07C7/11
CPCY02P20/152Y02P20/151
Inventor 毛松柏张超林朱道平叶宁丁雅萍
Owner SINOPEC NANJING RES INST OF CHEM IND CO LTD