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An organic-inorganic composite biogas desulfurization membrane and its preparation method

A biogas desulfurization and inorganic composite technology, applied in chemical instruments and methods, membrane technology, gas fuels, etc., can solve the problems of large amount of lye by-product desulfurization, complex process, secondary pollution and energy consumption, etc., to improve the quality of biogas and combustion value, solve the effect of high energy consumption and high recovery rate

Inactive Publication Date: 2020-09-29
黑龙江省农业科学院农村能源研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Physical and chemical methods have problems such as complex process, high operating cost, easy to produce secondary pollution and high energy consumption.
While the biological method removes H 2 S has the problems of bulky equipment, large amount of lye, and treatment of by-products of desulfurization

Method used

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  • An organic-inorganic composite biogas desulfurization membrane and its preparation method
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  • An organic-inorganic composite biogas desulfurization membrane and its preparation method

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Embodiment 1

[0028] Step 1. The steps of preparing an inorganic substance-solvent mixture: weigh 0.45 gram molecular sieve and add it to 75 grams of nitrogen methyl pyrrolidone, and ultrasonically vibrate for 30 minutes in an ultrasonic water bath with a power of 800W and a water bath temperature of 50°C for 30 min. Uniform molecular sieve-nitrogen pyrrolidone mixture, take out;

[0029] Step 2. The steps to prepare a high-temperature homogeneous solution of polymer-inorganic-solvent: add 25 grams of polysulfone, stir continuously under the condition of 60℃ and nitrogen protection, dissolve in a water bath at 60℃ for 6 hours, and let stand for degassing 36 Compared with the conventional NIPS membrane production method, it needs to be dissolved at 180°C (the boiling point temperature of the nitrogen methyl pyrrolidone solvent is 203°C, 23°C below the boiling point temperature of the solvent) for 4 hours to prepare polysulfone- Molecular sieve-nitrogen methyl pyrrolidone solution;

[0030] Step ...

Embodiment 2

[0034] Step 1. Steps for preparing inorganic substance-solvent mixture: weigh 0.15 g of SiO 2 Add to 75 grams of N,N-dimethylformamide, and ultrasonically shake for 30 minutes in an ultrasonic water bath with a power of 500W and a water bath temperature of 50℃ to obtain uniformly dispersed SiO 2 -N,N-dimethylformamide mixture, take it out;

[0035] Step 2. The steps of preparing a high polymer-inorganic-solvent high-temperature homogeneous solution: add 25 grams of PVDF, stir continuously under the condition of 60℃ and nitrogen protection, dissolve in a water bath at 60℃ for 6 hours, and leave it to degas 36 pieces. Compared with the conventional NIPS film forming method, it needs to be dissolved at 130℃ (the boiling temperature of N,N-dimethylformamide is 153℃, 23℃ below the boiling temperature of the solvent) for 4 hours. PVDF-SiO 2 -N,N-Dimethylformamide high temperature mixed solution;

[0036] Step 3. Steps to prepare polymer composite membrane: pressurize the formed PVDF-SiO ...

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Abstract

The present invention relates to a method for preparing an efficient organic-inorganic composite biogas desulfurization membrane, which belongs to the field of biogas purification. The problem to be solved is to provide a method suitable for biogas removal of H 2 The preparation method of the polymer composite film of S. In the present invention, a certain amount of solvent is added to the nanoparticles, mixed evenly, and then polymer is added, stirred and dissolved at low temperature, and then a high-temperature uniform solution is formed below the boiling point of the solvent, and then the film is formed by spinning or casting. After a certain evaporation time, the nascent film was immersed in a coagulation bath, washed three times with distilled water, immersed in glycerin, and dried or dried naturally.

Description

Technical field [0001] The invention belongs to the field of biogas purification, and more specifically, relates to an organic-inorganic composite biogas desulfurization membrane and a preparation method thereof. Background technique [0002] As a clean energy, biogas plays a huge role in responding to climate change, developing a low-carbon circular economy, and promoting rural construction. However, biogas is a combustible gas mixture with methane as the main component, containing 50 to 70% CH 4 , 30-50% CO 2 And 0.1~3% of H 2 S etc. The presence of hydrogen sulfide, carbon dioxide and other impurity gases affect the quality and utilization efficiency of biogas. H 2 S is a colorless, highly toxic, acidic gas that is heavier than air. The concentration higher than 1mg / L will endanger human life. In addition, H 2 S interacts with the water vapor in the biogas, which will cause safety problems during the purification, transmission, storage and use of the biogas. Therefore, desul...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D69/12B01D67/00B01D69/06B01D69/08B01D71/26B01D71/34B01D71/38B01D71/64B01D71/68C10L3/10
CPCB01D67/0079B01D69/06B01D69/08B01D69/12B01D71/26B01D71/34B01D71/38B01D71/64B01D71/68C10L3/103C10L3/104C10L2290/541C10L2290/548
Inventor 史风梅马玉新裴占江刘杰王粟卢玢宇高亚冰
Owner 黑龙江省农业科学院农村能源研究所