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for selective absorption 2 The imidazole polymer absorbent and its application

A polymer and absorbent technology, which is applied in separation methods, dispersed particle separation, chemical instruments and methods, etc., can solve the problems of difficult management and maintenance, high operating costs, secondary pollution, etc., and achieves a simple preparation process and high absorption efficiency. , The effect of high non-volatile

Active Publication Date: 2020-05-15
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the removal efficiency of wet desulfurization technology is as high as 90% or more and the utilization rate of desulfurizer is high, the equipment cost is equivalent to 10% of the total construction cost of the power plant, and the operation cost is expensive, management and maintenance are difficult, and secondary pollution occurs
Traditional non-resourced SO 2 The removal technology consumes absorbent and produces a large amount of waste water, making it inconsistent with the concept of green chemical industry

Method used

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  • for selective absorption <sub>2</sub> The imidazole polymer absorbent and its application
  • for selective absorption <sub>2</sub> The imidazole polymer absorbent and its application
  • for selective absorption <sub>2</sub> The imidazole polymer absorbent and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Take by weighing 15.30g of poly-1-vinylimidazole with an average molecular weight of 2000, 0.20g of hydroquinone, 3.50g of piperazine, and 30.60g of water to make an absorbent, and use pure SO 2 gas and SO 2 The mixed gas with a content of 1.2 Vol% (volume percentage, the same below) was subjected to an absorption experiment at 30°C.

[0032] The absorbent for pure SO 2 The gas absorption is 15.84g, and the unit absorption is 0.32g / g(SO 2 / absorbent). The desulfurization rate of the absorbent reaches 98.8% when the flow rate of the mixed gas is 400ml / min.

Embodiment 2

[0054] Weigh 14.90 g of poly-1-vinylimidazole with an average molecular weight of 2000, 0.25 g of anthraquinone, 4.70 g of 1-methylimidazole, and 30.20 g of water to make an absorbent, and use pure SO 2 gas and SO 2 The mixed gas with a content of 1.2 Vol% (volume percentage, the same below) was subjected to an absorption experiment at 30°C.

[0055] The absorbent for pure SO 2 The absorption capacity of gas is 16.54g, and the unit absorption capacity is 0.33g / g(SO 2 / absorbent). The desulfurization rate of the absorbent reaches 99.1% when the flow rate of the mixed gas is 400ml / min.

Embodiment 3

[0057] Weigh 14.10 g of poly-1-vinylimidazole with an average molecular weight of 2000, 0.15 g of catechol, 4.90 g of N-methyldiethanolamine, and 30.80 g of water to make an absorbent, and use pure SO 2 gas and SO 2 The mixed gas with a content of 1.2 Vol% (volume percentage, the same below) was subjected to an absorption experiment at 30°C.

[0058] The absorbent for pure SO 2 The gas absorption is 14.94g, and the unit absorption is 0.30g / g(SO 2 / absorbent). The desulfurization rate of the absorbent reaches 98.3% when the flow rate of the mixed gas is 400ml / min.

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Abstract

The invention discloses an imidazole polymer absorbent for selectively absorbing SO2 and application of the imidazole polymer absorbent, and belongs to the field of environmental protection and gas purification. The imidazole polymer absorbent comprises the following components in percentage by mass: 10-50% of an imidazole polymer, 0.01-0.2% of an antioxidant, 3.00-10.00% of an activation additive and the balance of water. By virtue of relatively appropriate alkalinity of N atoms on the site 3 of imidazole functional group structure, according to pH buffer liquid principles, and considering the non-volatility and the thermal stability of a polymer, the invention discloses the imidazole polymer water solution absorbent which is simple in preparation process, low in cost, high in absorption selectivity upon SO2 and high in absorption efficiency, and SO2 can be recycled.

Description

technical field [0001] The invention belongs to the field of environmental protection and gas purification, in particular to an imidazole polymer absorbent for selectively absorbing SO2 and its application. Background technique [0002] SO 2 is one of the main air pollutants, SO 2 The large amount of emissions is the main reason for the formation of acid rain, smog and other environmental problems. Sulfur dioxide in the atmosphere mainly comes from the burning of coal and other fossil fuels, so the control of sulfur dioxide emissions in flue gas is the main task of air pollution control. From 2011 to 2015, my country's total sulfur dioxide emissions were around 20 million tons, ranking first in the world. With the improvement of environmental protection awareness and the increasingly stringent requirements for air pollutant emissions, higher requirements are put forward for flue gas desulfurization technology. [0003] There are many kinds of flue gas desulfurization tec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/78B01D53/50
CPCB01D53/50B01D53/78
Inventor 张吕鸿杨华伟顾文豪澹台晓伟
Owner TIANJIN UNIV