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Preparing method for loaded metal oxide catalyst

A catalyst and oxide technology, applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of increasing preparation time, energy consumption, large particles, etc., and achieve the effect of energy saving in the preparation process

Inactive Publication Date: 2005-02-23
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] From the above commonly used methods for preparing supported metal oxide catalysts, we can understand that precipitation pyrolysis and impregnation pyrolysis are the most commonly used methods, which are convenient and simple, and can prepare most metal oxide catalysts However, this method needs to be roasted under high temperature conditions, which has a serious energy consumption problem, and at the same time, because the high temperature roasting has increased the preparation time, this has the problem of lengthy preparation process; while the colloid method, although it High-efficiency catalysts can be prepared, and the reaction process does not require high-temperature treatment, but strict control is required during the preparation process, and the process is very complicated
In the above methods, there is a common problem, that is, the obtained catalyst needs to be mechanically ground at the end, otherwise it cannot be used.
Therefore, the particles are larger

Method used

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  • Preparing method for loaded metal oxide catalyst

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Get 1.0g of carbon black (Vulcan XC-72, produced by U.S. Cabot Company) and place it in a 100ml reactor, add 15ml of isopropanol aqueous solution (isopropanol:water=1:3), ultrasonically stir for 10 minutes, and drop into 12.46ml 1MCo(NO 3 ) 3, followed by ultrasonic homogenization until the sample becomes a paste, the beaker containing the sample is transferred to a large glass container with a volume of 250ml using tungsten carbide as the microwave sensitive material, and the above reactor is placed in a microwave oven (frequency is 2.45GHz, output The power is 850W and the temperature is 600°C). The sample was dried using an intermittent microwave heating program, and the heating program was controlled as microwave heating for 15 seconds / stop for 30 seconds and repeated four times. The above-mentioned dried sample was then subjected to the following microwave heating procedure: heating for 20 seconds / stopping for 60 seconds was repeated six times, and the reaction s...

Embodiment 2

[0036] Get 1.0g of carbon black (Vulcan XC-72, produced by U.S. Cabot Company) and place it in a 100ml reactor, add 15ml of isopropanol aqueous solution (isopropanol:water=1:3), ultrasonically stir for 10 minutes, slowly drop into 5.81ml 1MCeCl 3 aqueous solution, then dropwise added K 2 CO 3 Until the pH is 9, then ultrasonically mix until the sample becomes a paste, the beaker containing the sample is transferred to a large glass container of 250ml with carbon black as the microwave sensitive material, and the above-mentioned reactor is placed in a microwave oven (frequency is 2.45GHz, the output power is 850W, and the temperature is 750°C). The sample was dried by intermittent microwave heating program, and the heating program was controlled as microwave heating for 15 seconds / stop for 30 seconds and repeated four times; the dried above-mentioned samples were subjected to the following microwave heating procedure: heating for 20 seconds / stop for 60 seconds for six times ...

Embodiment 3

[0038] Get 1.0g of nano-titanium oxide (Degusa P25 type, U.S.A.) and place it in a 100ml reactor, add 15ml of isopropanol aqueous solution (isopropanol: water = 1: 3), ultrasonically stir for 10 minutes, drop into 13.11ml of 1MMn (NO 3 ) 3 , then ultrasonically mixed until the sample becomes a paste, the beaker containing the sample is transferred to a large glass container with a volume of 250ml using molybdenum carbide as a microwave sensitive material, and the above reactor is placed in a microwave oven (frequency is 2.45GHz, output The power is 850W and the temperature is 800°C). The sample was dried by intermittent microwave heating program, and the heating program was controlled as microwave heating for 15 seconds / stop for 30 seconds and repeated four times; the dried above-mentioned samples were subjected to the following microwave heating procedure: heating for 20 seconds / stop for 60 seconds for six times Second, after the reaction system was cooled, samples were obta...

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Abstract

A carried metallic oxide catalyst is prepared through mixing carrier with the precursor of active component, microwave drying, and microwave to thermodecompose said precursor to obtain the relative oxide.

Description

technical field [0001] The invention relates to a method for preparing a catalyst, in particular to a method for preparing a supported metal oxide catalyst. Background technique [0002] Metal oxides are widely used in metallurgy, petrochemical industry, functional ceramics and glass industry, especially in the field of catalysis, which can catalyze the reaction of various small molecular compounds such as H 2 , CO, O 2 , NO X It plays an important role in the control of automobile exhaust, water treatment, catalytic cracking and reforming of petroleum. In addition, in the field of electrocatalysis, metal oxides such as MnO 2 It has a good reducing effect on oxygen and is used as a cathode catalyst in fuel cells. co 2 o 3 As an anode catalyst, it can catalyze the oxidation of small organic molecules such as glucose. In order to improve the utilization rate of the catalyst and increase the contact area between the reactant and the catalyst, a ...

Claims

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Application Information

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IPC IPC(8): B01J37/00B01J37/34
Inventor 沈培康田植群徐常威
Owner SUN YAT SEN UNIV
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