A shaped catalyst for fixed-bed Fenton reaction and preparation method thereof
A Fenton reaction and catalyst technology, which is applied in the direction of molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of difficult recycling of catalysts, narrow applicable pH range, large output of chemical sludge, etc., and achieve regeneration The method is simple, the regeneration performance is good, and the cost is low
Active Publication Date: 2019-02-26
FUDAN UNIV
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Problems solved by technology
However, traditional homogeneous catalysts have problems such as narrow applicable pH range, difficulty in recycling catalysts, and large and difficult to handle chemical sludge. Therefore, research on heterogeneous shaped catalysts that can be used in fixed-bed Fenton reactions is not only an urgent need to be solved. scientific research issues, and is of great significance to the application of Fenton catalysts in practical wastewater treatment
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[0031] The technical solutions of the present invention will be described below in conjunction with specific embodiments.
[0032] The catalyst forming process is as follows:
[0033] (1) 2kg Y-type zeolite, 100g polyurethane and 50g polyvinyl alcohol are placed in a rotary molding machine, and 1.5kg of deionized water is sprayed therein to obtain a spherical catalyst with a diameter of about 1.5 to 2.0mm;
[0034] (II) Blow the spherical catalyst obtained above at 45°C, replenish traces of water several times in the middle, dry at 120°C for 6 hours after 2 hours, and finally roast at 600°C for 6 hours.
[0035] Perform ion exchange on the formed catalyst, the process is as follows:
[0036] (1) Weigh 4.56g of ferric nitrate nonahydrate, dissolve it in 10ml of ethanol, put the above shaped catalyst into the ethanol solution of ferric nitrate, stir at 25°C for 12h, and dry the obtained catalyst at 70°C for 5h;
[0037] (II) continue to drop the dried catalyst into an ethanol ...
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Abstract
The invention belongs to the technical field of industrial catalysis, and particularly relates to a preformed catalyst used for a fixed-bed Fenton reaction and a preparing method thereof. The catalyst is prepared by adopting preformed commercial zeolite as a carrier, and by steps of dissolving a certain amount of an adhesive, a pore forming agent and an active component precursor salt (Fe or Co) into ethanol or water, and uniformly dispersing the active component to the carrier by a wet dipping manner. Organic waste water difficult to treat in the industry such as phenols and dye can be efficiently degraded by the catalyst at room temperature (lower than 30 DEG C) and under a nearly neutral condition (with the pH value being 6-8) when the catalyst is added into a fixed bed reactor, and the degradation rate can be higher than 90%. A regeneration method of the catalyst is simple and convenient, and the regenerated catalyst is good in catalytic performance. The catalyst is long in service lifetime, low in cost and wide in application prospect.
Description
technical field [0001] The invention belongs to the technical field of industrial catalysis, and in particular relates to a fixed-bed Fenton catalyst and a preparation method thereof. Background technique [0002] With the social development and population growth, the resulting environmental pollution is increasing day by day, and the removal of refractory pollutants in water and the reduction of water pollution have attracted widespread attention [BabuponnusamiA., et. al., Journal of Environmental Chemical Engineering. 2014, 2, 557]. With the increasingly complex wastewater quality and the country's emphasis on environmental protection, traditional treatment methods have become increasingly difficult to meet the treatment needs of refractory wastewater. [0003] Advanced Oxidation Technology (AOPs) is based on the strong oxidation activity of hydroxyl radicals (HO ) generated in the system, which can non-selectively remove and degrade organic pollutants that are difficul...
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IPC IPC(8): B01J29/14B01J29/24B01J29/46B01J29/072B01J29/76C02F1/28C02F1/72C02F101/30C02F101/34
Inventor 程晓维邓勇辉
Owner FUDAN UNIV