Bayer-process red mud modified biomass activated carbon for degrading formaldehyde and preparation method thereof

A Bayer process red mud and activated carbon technology, applied in separation methods, chemical instruments and methods, carbon compounds, etc., can solve the problems of unfavorable ecological environment sustainable development, short service life of activated carbon, secondary pollution of indoor environment, etc. The effect of sustainable development, short service life and lower production costs

Inactive Publication Date: 2019-05-28
ANHUI UNIVERSITY OF TECHNOLOGY
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AI-Extracted Technical Summary

Problems solved by technology

[0004] In order to solve the problem that on the one hand, activated carbon is generally prepared by wood and bamboo, which leads to high cost and is not conducive to the sustainable development of the ecological environment; on the other hand, the service life of activated carbon is short...
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Abstract

The invention discloses Bayer-process red mud modified biomass activated carbon for degrading formaldehyde and a preparation method thereof and belongs to the field of resource utilization of solid wastes. The Bayer-process red mud modified biomass activated carbon comprises biomass waste, red mud, phosphoric acid, absolute ethyl alcohol, hydrochloric acid and water. The biomass waste comprises one or more of shells, pits and straws. The red mud is Bayer-process red mud. The Bayer-process red mud modified biomass activated carbon is prepared by compounding the Bayer-process red mud and biomasswaste materials; metal oxide in the Bayer-process red mud is used for carrying out modification treatment on the biomass waste materials and the production cost of the modified activated carbon is reduced by 50 to 60 percent; high-additional-value application of the Bayer-process red mud and the biomass waste materials is expanded and a novel concept of treating dangerous materials with waste isrealized.

Application Domain

Carbon compoundsDispersed particle separation +1

Technology Topic

BiomassChemistry +13

Image

  • Bayer-process red mud modified biomass activated carbon for degrading formaldehyde and preparation method thereof
  • Bayer-process red mud modified biomass activated carbon for degrading formaldehyde and preparation method thereof
  • Bayer-process red mud modified biomass activated carbon for degrading formaldehyde and preparation method thereof

Examples

  • Experimental program(7)
  • Comparison scheme(1)

Example Embodiment

[0024] Example 1
[0025] Taking the preparation of 100g of the product of the present invention as an example, the components and their mass ratios are:
[0026]
[0027] The biomass waste is a nut shell; the red mud is Bayer process red mud; the phosphoric acid is of analytical grade; the anhydrous ethanol is of analytical grade; the hydrochloric acid is of analytical grade; the water is deionized water .
[0028] First, the biomass waste is washed and dried, and then pulverized by a frequency conversion planetary ball mill at a speed of 500r/min for 90 min to obtain biomass waste powder; the red mud is ground using a frequency conversion planetary ball mill at a speed of 600r/min for 60 min. Obtain red mud powder.
[0029] Secondly, after mixing the micropowder of biomass waste with phosphoric acid, use an ultrasonic cell disintegrator with an ultrasonic power of 400W to ultrasonically disperse for 30 minutes to obtain a solution of micropowder of biomass waste; mix the micropowder of red mud with water and add hydrochloric acid. An ultrasonic cell disruptor with an ultrasonic power of 500W was ultrasonically dispersed for 50 minutes to obtain a red mud micropowder solution; after mixing the biomass waste micropowder solution with the red mud micropowder solution and adding absolute ethanol, the ultrasonic cell disrupter with an ultrasonic power of 800W was used After 120 minutes of ultrasonic dispersion, the precursor of Bayer process red mud modified biomass activated carbon was obtained.
[0030] Finally, the precursor of the Bayer process red mud modified biomass activated carbon was placed in a vacuum drying oven with a vacuum pressure of -0.06MPa and a temperature of 70°C for 240 minutes, and then calcined in an experimental furnace at a calcination temperature of 200°C for 30 minutes to obtain the Bayer process Red mud modified biomass activated carbon.

Example Embodiment

[0031] Example 2
[0032] Taking the preparation of 100g of the product of the present invention as an example, the components and their mass ratios are:
[0033]
[0034] The biomass waste is fruit pit; the red mud is Bayer process red mud; the phosphoric acid is of analytical grade; the anhydrous ethanol is of analytical grade; the hydrochloric acid is of analytical grade; the water is deionized water .
[0035] First, the biomass waste is washed and dried, and then pulverized with a frequency conversion planetary ball mill at a speed of 400r/min for 45 minutes to obtain biomass waste powder; the red mud is ground using a frequency conversion planetary ball mill at a speed of 500r/min for 75 minutes, Obtain red mud powder.
[0036] Secondly, after mixing the micropowder of biomass waste with phosphoric acid, ultrasonically disperse it for 50 minutes by using an ultrasonic cell disruptor with an ultrasonic power of 600W to obtain a micropowder solution of biomass waste; mix the micropowder of red mud with water and add hydrochloric acid, then use The ultrasonic cell disruptor with an ultrasonic power of 400W is ultrasonically dispersed for 40 minutes to obtain a red mud micropowder solution; after mixing the biomass waste micropowder solution with the red mud micropowder solution and adding anhydrous ethanol, the ultrasonic cell disrupter with an ultrasonic power of 700W is used After 60 minutes of ultrasonic dispersion, the precursor of Bayer process red mud modified biomass activated carbon was obtained.
[0037] Finally, the precursor of the Bayer process red mud modified biomass activated carbon was placed in a vacuum drying oven with a vacuum pressure of -0.04MPa and a temperature of 80°C for 180 minutes, and then roasted in an experimental furnace at a calcination temperature of 300°C for 15 minutes to obtain the Bayer process Red mud modified biomass activated carbon.

Example Embodiment

[0038] Example 3
[0039] Taking the preparation of 100g of the product of the present invention as an example, the components and their mass ratios are:
[0040]
[0041]
[0042] The biomass waste is straw; the red mud is Bayer process red mud; the phosphoric acid is of analytical grade; the anhydrous ethanol is of analytical grade; the hydrochloric acid is of analytical grade; and the water is deionized water.
[0043] First, the biomass waste is washed and dried, and then pulverized by a frequency conversion planetary ball mill at a rotation speed of 600r/min for 60 minutes to obtain biomass waste micropowder; the red mud is ground using a frequency conversion planetary ball mill at a rotation speed of 400r/min for 90 min. Obtain red mud powder.
[0044] Secondly, after mixing the micropowder of biomass waste with phosphoric acid, use an ultrasonic cell disruptor with an ultrasonic power of 500W to ultrasonically disperse for 40 minutes to obtain a micropowder solution of biomass waste; mix the micropowder of red mud with water and add hydrochloric acid, then use Ultrasonic cell breaker with an ultrasonic power of 600W disperses for 60 minutes to obtain a red mud micropowder solution; after mixing the biomass waste micropowder solution with the red mud micropowder solution and adding absolute ethanol, use the ultrasonic cell breaker with an ultrasonic power of 600W After 100 minutes of ultrasonic dispersion, the precursor of Bayer process red mud modified biomass activated carbon was obtained.
[0045] Finally, the precursor of the Bayer process red mud modified biomass activated carbon was placed in a vacuum drying oven with a vacuum pressure of -0.08MPa and a temperature of 90°C for 120 minutes, and then calcined in an experimental furnace at a calcination temperature of 250°C for 45 minutes to obtain the Bayer process Red mud modified biomass activated carbon.
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Description & Claims & Application Information

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