Ru/Al2O3 catalytic ozone oxidation catalyst and its microwave synthesis method

A technology of ozone oxidation and microwave synthesis, applied in the direction of physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve problems such as poor results, achieve energy saving, Broad application prospects, promotion and application effects

Inactive Publication Date: 2006-06-14
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The activity of conventional metal oxide catalysts is generally suitable for catalyzing the ozone oxidation process under acidic conditions (pH=2), and the effect is often not good under neutral pH conditions; while other supported catalysts are all aimed at a certain model pollutant It has a good catalytic effect, and the application conditions are mostly in acidic pH conditions.

Method used

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  • Ru/Al2O3 catalytic ozone oxidation catalyst and its microwave synthesis method
  • Ru/Al2O3 catalytic ozone oxidation catalyst and its microwave synthesis method
  • Ru/Al2O3 catalytic ozone oxidation catalyst and its microwave synthesis method

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Effect test

Embodiment 1

[0024] Embodiment 1: Ru / Al 2 o 3 Catalyst preparation and its effect on the oxidation and mineralization of dimethyl phthalate by ozone

[0025] Using equal volume impregnation method, 1g / L RuCl 3 solution and Al 2 o 3 Carriers are mixed in equal volumes (this concentration of RuCl 3 The Ru loading of the prepared catalyst is 0.1wt.%), and soaked in a shaker at 100-160rmp for 2 hours at 10-30°C. Then dry in an air-atmosphere oven for 2 hours, the drying temperature is 105°C, the water content of the catalyst obtained at this time is about 33%, and finally microwave heating in a microwave reactor to obtain the finished catalyst, wherein the frequency of microwave heating is 2450MHz, The power is 300W, the microwave heating time is 3min, and the diameter of the microwave-treated reactor is 4cm.

[0026] In a 1L cylindrical bubbling semi-continuous reactor, the above Ru / Al 2 o 3 Catalytic ozone oxidation of dimethyl phthalate, catalyst dosage is 20g / L, catalyst particle s...

Embodiment 2

[0028] Embodiment two: Ru / Al 2 o 3 Catalyst preparation and its effect on the oxidation of mineralized phenol by ozone

[0029] Using equal volume impregnation method, 20g / L RuCl 3 solution and Al 2 o 3 Carriers are mixed in equal volumes (this concentration of RuCl 3 The Ru loading of the prepared catalyst is 2.0wt.%), and soaked in a shaker at 100-160rmp for 2 hours at 10-30°C. Then dry in an air-atmosphere oven for 2 hours, the drying temperature is 105°C, the water content of the catalyst obtained at this time is about 33%, and finally microwave heating in a microwave reactor to obtain the finished catalyst, wherein the frequency of microwave heating is 2450MHz, The power is 700W, the microwave heating time is 10min, and the diameter of the microwave-treated reactor is 4cm.

[0030]In a 1L cylindrical bubbling semi-continuous reactor with Ru / Al 2 o 3 Catalytic ozone oxidation of phenol, catalyst dosage is 20g / L, catalyst particle size is 2-3mm, initial concentratio...

Embodiment 3

[0031] Embodiment three: Ru / Al 2 o 3 Catalyst preparation and its effect on the oxidation and mineralization of oxalic acid by ozone

[0032] Using equal volume impregnation method, 1g / L RuCl 3 solution and Al 2 o 3 Carriers are mixed in equal volumes (this concentration of RuCl 3 The Ru loading of the prepared catalyst is 0.1wt.%), and soaked in a shaker at 100-160rmp for 2 hours at 10-30°C. Then dry in an air-atmosphere oven for 12 hours, the drying temperature is 105°C, the water content of the catalyst obtained at this time is about 7.2%, and finally the finished catalyst is obtained by microwave heating in a microwave reactor, wherein the frequency of microwave heating is 2450MHz, The power is 300W, the microwave heating time is 20min, and the diameter of the microwave-treated reactor is 4cm.

[0033] In a 1L cylindrical bubbling semi-continuous reactor with Ru / Al 2 o 3 Catalytic ozone oxidation of oxalic acid, catalyst dosage is 20mg / L, catalyst particle size 2-3...

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Abstract

A Ru/Al2O3 catalyst for the catalytic oxidization of ozone is composed of Al2O3 as carrier and RuO2 as active component proportionally. Its preparing process includes such steps as equivolume mixing between RuCl3 solution and Al2O3 carrier, impregnating in shaker, drying and microwave heating. It has high effect to remove ozone, interference substance to internal secretion, phenols and micro-molecular acids.

Description

technical field [0001] The present invention relates to Ru / Al 2 o 3 The catalytic ozonation catalyst and its microwave synthesis method are mainly used in the catalytic ozonation process to treat organic matter that is difficult to biodegrade in slightly polluted source water, and belong to the field of water treatment technology and environmental functional materials. Background technique [0002] Catalytic ozone oxidation technology is a new type of high-efficiency advanced oxidation water treatment technology. Due to the large amount of highly oxidizing free radicals generated during the reaction process, it can quickly oxidize and decompose most organic compounds, and can oxidize and decompose alcohols that are difficult to directly oxidize and decompose ozone. Ketones, organic acids and esters continue to oxidize, so the oxidation of organic pollutants is more complete and the removal efficiency is higher. Heterogeneous catalytic ozonation technology has a wider appli...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/46B01J37/34C02F1/78
Inventor 祝万鹏周云瑞陈迅
Owner TSINGHUA UNIV
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