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Adsorbent for selectively removing low-concentration sulfur dioxide from gas containing carbon dioxide

A carbon dioxide and sulfur dioxide technology, applied in the direction of absorption, reagents, inorganic chemistry, etc., can solve the problems of high energy consumption and secondary pollution, and achieve the effect of small circulation, no secondary pollution, and saving power consumption.

Active Publication Date: 2014-06-11
中峰信和(大连)科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

High energy consumption and secondary pollution

Method used

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  • Adsorbent for selectively removing low-concentration sulfur dioxide from gas containing carbon dioxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Step 1. Add 0.2461g of sodium acetate, 0.2g of manganese sulfate and 0.005g of sodium dodecylbenzenesulfonate into 60g of water as the initial absorption solution. 2 2000ppm CO 2 Gas and air are absorbed, and the pH value of the absorption liquid and the outlet SO are detected every ten minutes 2 Concentration changes, the outlet concentration is below 50ppm within 70 minutes of absorption, and the absorption rate is as high as 99%. After 160 minutes of absorption, the absorption is saturated, and the pH value of the absorption solution is 3.48. stop ping SO 2 and CO 2 mixed composition. Stop the gas flow, and detect the sulfate content in the absorption solution.

[0032] Step 2. Continue to add 0.2461g of sodium acetate solid at a temperature of 40°C, pass air into it for forced oxidation for 120 minutes, and detect SO by spectrophotometry. 4 2- content.

[0033] Step 3. Add 0.2g CaCO to the absorption solution after forced oxidation 3 , stir well, and filter...

Embodiment 2

[0035] Step 1. Add 0.2889g sodium propionate, 0.2g manganese sulfate and 0.005g sodium dodecylbenzenesulfonate to 60g water as the initial absorption liquid, and at a temperature of 40°C, pass through 2 2000ppm CO 2 Gas and air are absorbed, and the pH value of the absorption liquid and the outlet SO are detected every ten minutes 2 Concentration changes, the outlet concentration is below 100ppm within 70 minutes of absorption, and the absorption rate is as high as 96%. After 180 minutes of absorption, the absorption is saturated, and the pH value of the absorption solution is 3.56. Stop the gas flow, and detect the sulfate content in the absorption solution.

[0036] Step 2 and step 3 are the same as in Example 1, and the amount of sodium propionate added is 0.2889g.

Embodiment 3

[0038] Step 1. Add 0.46g sodium succinate, 0.2g manganese sulfate and 0.005g sodium dodecylbenzenesulfonate to 60g water as the initial absorption liquid, and at a temperature of 40°C, pass through 2 2000ppm CO 2The gas is absorbed, and the pH value of the absorption liquid and the outlet SO are detected every ten minutes 2 Concentration changes, the outlet concentration is below 90ppm within 40 minutes of absorption, and the absorption rate is as high as 99%. After 150 minutes of absorption, the absorption is saturated, and the pH value of the absorption solution is 3.78. Stop the gas flow, and detect the sulfate content in the absorption solution.

[0039] Step 2 and step 3 are the same as in Example 1, and the amount of sodium succinate added is 0.46g.

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Abstract

The invention discloses an adsorbent for selectively removing low-concentration sulfur dioxide from gas containing carbon dioxide, which belongs to the technical field of protection of natural resources and environment. The adsorbent is characterized in that the adsorbent is used in an absorption tower during the gas-liquid mass transfer, can selectively remove sulfur dioxide in low-concentration carbon dioxide feed gas, and does not lose the carbon dioxide. The content of the carbon dioxide in the feed gas which can be treated by the adsorbent is between 3 and 8 percent, and the content of the sulfur dioxide is between 0.0001 and 80 percent. The adsorbent takes 0.4 to 80 percent carboxylate or carboxylate derivative as a main absorption component, 0.01 to 4 percent of transition metal ions as a catalyst and 0.006 to 0.01 percent of sodium dodecylbenzebesuefonate as a foamer, and the balance of water. The adsorbent has the advantages that the adsorbent has high purification rate, largeabsorption capacity, small regeneration energy consumption, small corrosion on equipment, no blocking, easy regeneration and no secondary pollution. The adsorbent cannot be affected by the content of oxygen in flue gas during the absorption, has strong adaptability on fuel, and ensures that the desulfurization rate can reach more than 99 percent.

Description

technical field [0001] The invention belongs to the technical field of resource and environment protection, and relates to an absorbent for selectively removing low-concentration sulfur dioxide from carbon dioxide-containing gas while retaining carbon dioxide (abbreviated as "carbon-preserving desulfurization"). Background technique [0002] With the rapid development of industrial production, the pollution of carbon dioxide waste gas to the atmosphere is becoming more and more serious, which in turn causes the greenhouse effect. Therefore, it is of great significance to recycle carbon resources and use them in chemical industry, machinery, food, agriculture and other fields to reduce the pressure of carbon dioxide emissions. The source of carbon dioxide gas is mainly the flue gas of coal-fired power plants and industrial boilers with various fuels, as well as the tail gas emitted from the pyrolysis process of ores such as calcium carbonate and magnesium carbonate, and the c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/14C01B31/20C01B17/56C01B32/50
CPCY02C10/06Y02A50/20Y02C20/40Y02P20/151
Inventor 张永春陈恒陈绍云
Owner 中峰信和(大连)科技有限公司
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