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Method for promoting removal of COS and CS2 in natural gas

A natural gas and removal technology, applied in separation methods, chemical instruments and methods, gas fuels, etc., can solve the problems of increasing the cost of purification and treatment, limiting the processing capacity of the absorption device, etc., to increase the load, improve the degree of removal, and reduce the total effect of sulfur

Inactive Publication Date: 2018-12-14
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In actual operation, it is impossible to combine CO 2 Therefore, the removal of COS may affect the total sulfur of the purified gas, limit the increase in the treatment capacity of the absorption device, and increase the cost of purification treatment

Method used

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  • Method for promoting removal of COS and CS2 in natural gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The test raw material gas and conditions are the same as those of Comparative Example 1, but a section of 150mm high COS and CS is added to the middle and lower part of the absorption tower 2 Hydrolysis catalyst. The test results are shown in Table 1.

Embodiment 2

[0020] The test pressure is 2.5MPa, and the other test raw materials and conditions are the same as in Comparative Example 1, but a section of 150mm high COS and CS is added to the middle and lower part of the absorption tower 2 Hydrolysis catalyst. The test results are shown in Table 1.

Embodiment 3

[0022] The pressure of the natural gas used in the test is 2.5MPa, it enters the test device at room temperature, and the volume fraction of the main component of the natural gas is H 2 S 2.0%, CO 2 5.0%, COS 300ppmv, CS 2 100ppmv and the rest are nitrogen, but a section of 300mm high COS and CS is added to the middle and lower part of the absorption tower 2 Hydrolysis catalyst. The test results are shown in Table 1.

[0023] The test result of table 1 comparative example and embodiment

[0024] project

gas-liquid ratio

COS removal rate

CS 2 Removal rate

comparative example

200

43.7%.

31.3%

Implementation column 1

200

83.8%

75.6%

Implementation column 2

230

79.2%

73.0%

Implementation column 3

200

80.5%

73.4%

[0025]The gas-liquid ratio in Table 1 is the ratio of the gas flow to the absorption liquid flow, which can be used to measure the processing load. For the built test devic...

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Abstract

In the invention, a hydrolysis catalysis section is added in the middle of a common absorption tower commonly used in an alcohol-amine method, i.e. the one hydrolysis catalysis section is added nearbythe position with higher absorption temperature, a catalytic hydrolysis section is filled with100-300 mm of a hydrolysis catalyst of COS and CS2, and the catalytic hydrolysis is accelerated by utilizing the heat of an absorption reaction, so that the removal degree of COS and CS2 is increased to 70%-80% under the normal condition and is nearly increased twice when being compared with the traditional manner, and the bottleneck that the load of an absorption device cannot be increased due to lower removal degree of COS and CS2 and higher total sulfur is removed.

Description

technical field [0001] The invention relates to a method for promoting natural gas containing COS, CS 2 Gas removal of COS and CS 2 The invention relates to a method for reducing the total sulfur content in purified gas, belonging to the technical field of gas purification treatment. Background technique [0002] Natural gas is a high-quality, efficient and clean low-carbon energy and chemical raw material, and its status as a resource is becoming increasingly prominent. To reduce CO 2 , dust and other pollutants, the global natural gas consumption continues to increase steadily, and China is growing rapidly. In fact, the global natural gas consumption has maintained a growth rate of about 2% for 30 consecutive years, and the annual growth rate of natural gas consumption in my country is also greater than 8%. It can be seen that the continuous increase of natural gas consumption at home and abroad will also accelerate and increase the extraction of natural gas. Accordin...

Claims

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Application Information

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IPC IPC(8): B01D53/86B01D53/48C10L3/10
CPCB01D53/8603B01D53/8606C10L3/103
Inventor 毛松柏陈园园朱道平周志斌杨绪甲余勇宋丽
Owner CHINA PETROLEUM & CHEM CORP
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