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Novel globular active carbon and use in desulfuration field

A technology of activated carbon and spherical shape, which is applied in the new spherical activated carbon and its application in the field of desulfurization. It can solve the problems of high resistance and small sulfur capacity of fixed bed, and achieve the effect of regular structure, small gas pressure drop and uniform appearance.

Inactive Publication Date: 2009-01-21
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the defects of existing activated carbon desulfurizers, the present invention provides a modified new spherical activated carbon for H 2 The removal of S solves the shortcomings of ordinary activated carbon desulfurizers such as small sulfur capacity and high resistance to fixed bed use.

Method used

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  • Novel globular active carbon and use in desulfuration field
  • Novel globular active carbon and use in desulfuration field
  • Novel globular active carbon and use in desulfuration field

Examples

Experimental program
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Effect test

Embodiment 1

[0040] Mix 10 g of pitch-based spherical activated carbon (PSAC-220) with 8% Na 2 CO 3 The solution was impregnated with an equal volume, and dried at 120° C. for 24 hours to obtain the novel spherical activated carbon of the present invention.

[0041] With novel spherical activated carbon of the present invention as desulfurizer, at normal pressure, temperature is 30 ℃, relative humidity is 90%, H 2 The desulfurization performance was characterized under the condition that the S inlet concentration was 1500ppm and the oxygen content was 1%. When the breakthrough concentration was 1ppm, the test results showed that the breakthrough sulfur capacity of the new spherical activated carbon desulfurizer was 62%.

Embodiment 2

[0043] The spherical activated carbon of the present invention was prepared by impregnating 10 g of phenolic resin-based spherical activated carbon with KOH solution with a mass concentration of 5% in equal volume, and drying at 120° C. for 24 hours.

[0044] The new spherical activated carbon of the present invention is used as a desulfurizer, and the desulfurization performance is characterized under the conditions of normal pressure, temperature of 25°C, relative humidity of 80%, H2S concentration of 1500ppm, and oxygen content of 1%. When the breakthrough concentration is 1ppm , The test results show that the breakthrough sulfur capacity of the new spherical activated carbon is 54%.

Embodiment 3

[0046] At normal pressure, temperature is 30°C, relative humidity is 90%, H in raw gas 2 S content is 1000ppm, and oxygen content is under the condition of 1%, the novel spherical activated carbon desulfurizer of embodiment 1, common impregnated active carbon, high sulfur capacity impregnated activated carbon dry desulfurizer (patent No. CN1088387C), U.S. Westvaco active carbon carry out performance comparison , the results are shown in Table 1. As can be seen from Table 1, when the breakthrough concentration is 1 ppm, the breakthrough sulfur capacity of the new spherical activated carbon of the present invention as a desulfurizer is the largest, which can reach 62%.

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Abstract

The invention relates to novel spherical active carbon and the application thereof in the field of desulfurization. The novel spherical active carbon of the invention is prepared by carrying out equivalent volume impregnation or excessive impregnation of pitch-based spherical activated carbon or resin-based spherical activated carbon with the alkaline compound of sodium or potassium and drying the materials at 30-160 DEG C. The novel spherical active carbon of the invention can be taken as H2S desulfurizer and has the advantages of simple preparation, large breakthrough sulfur capacity, small air resistance in the application of a fixed bed, small pressure reduction and low dust capacity of active carbon. The novel spherical active carbon can be widely applied to the removal process of H2S in the tail gas of sewage treatment plants, synthesis gases, petroleum and natural gas.

Description

technical field [0001] The present invention relates to the preparation of a new type of spherical activated carbon and its application in the field of desulfurization, in particular to a new type of spherical activated carbon modified by impregnating the surface of an alkaline compound, and the spherical activated carbon used as H 2 Application of S desulfurizer. technical background [0002] In the oil and gas industry, the purification and desulfurization of natural gas and refinery gas (both collectively referred to as petroleum gas) is a very important process, which directly affects the synthetic production of petrochemical products and environmental protection. Currently, research and development of the H 2 There are many kinds of S removal methods. According to the desulfurization method, it can be divided into two categories: dry method and wet method. Generally, due to the shortcomings of low desulfurization accuracy and secondary pollution, the wet method often...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01D53/52
Inventor 梁晓怿陈庆军刘小军徐生盼王志乔文明凌立成
Owner EAST CHINA UNIV OF SCI & TECH
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