Regeneration method for activated carbon or carbon-based catalyst

Abstract

The invention discloses a regeneration method for activated carbon or a carbon-based catalyst. The method comprises the following steps that the methylene blue value of inactivated activated carbon ismeasured, or ozone degradation is catalyzed by a carbon-based catalyst to decrease the COD (chemical oxygen demand), and the removal rate of COD (chemical oxygen demand) is measured; the inactivatedactivated carbon or the carbon-based catalyst is soaked into a NaOH solution; ozone is introduced into the NaOH solution; the activated carbon or the carbon-based catalyst is taken out from the NaOH solution and is washed thoroughly with clean water, and then dehydrating and drying are carried out so as to obtain the regenerated activated carbon or the regenerated carbon-based catalyst; and the methylene blue value of the obtained regenerated activated carbon is measured and is compared with the original measured methylene blue value, the activation effect of the activated carbon is evaluated,or ozone degradation is catalyzed by the obtained regenerated carbon-based catalyst to decrease the COD (chemical oxygen demand), the removal rate of the COD (chemical oxygen demand) is measured andis compared with the original measured removal rate of the COD (chemical oxygen demand), and the activation effect of the carbon-based catalyst is evaluated. The method has the advantages of being good in activation effect, short in time and high in activation efficiency.

Description

technical field [0001] The invention relates to the field of chemical industry and environmental protection, in particular to a method for regenerating activated carbon or carbon-based catalysts. Background technique [0002] Activated carbon or carbon-based catalysts are widely used in environmental protection and have achieved considerable results. However, activated carbon needs to be replaced after adsorption saturation or catalytic deactivation of carbon-based catalysts. A large number of replaced activated carbon or carbon-based catalysts are treated by physical desorption or chemical means. Afterwards, the activity can be restored and reused. [0003] Existing regeneration technologies usually include: physical regeneration, biological regeneration, chemical cleaning, etc. [0004] Among them, high-temperature steam desorption and high-temperature rotary kiln secondary roasting are most commonly used, and the activation temperature is greater than 800°C. The physica...

AI Technical Summary

Problems solved by technology

The physical method has high regeneration efficiency and a wide range of applications, but it consumes a lot of energy in regeneration, and the investment and operating costs are high; the biological regeneration method uses domesticated bacteria to analyze the organic matter adsorbed on activated carbon and carbon-based catalysts, and further digest and decompose them. The biological process is simple and easy, with low investment and operating costs, but it takes a long time, is greatly affected by water quality and temperature, has low efficiency, and the biodegradation is selective and incomplete; chemical cleaning methods often A large amount of acid, alkali or organic solvent is required. The essence of activation is to transfer pollutants to the cleaning agent without completely eliminating them, causing secondary pollution to the environment

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