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Method for measuring wear rate of catalyst

A measurement method and wear rate technology, which can be used in the preparation of test samples, weighing by removing certain components, and chemical analysis by combustion. Highly maneuverable and repeatable effects

Active Publication Date: 2021-02-26
CHNA ENERGY INVESTMENT CORP LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method takes a long time, and generally requires at least 1000 hours to reflect the wear rate of the catalyst under working conditions, making it difficult to implement

Method used

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  • Method for measuring wear rate of catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] This embodiment is used to illustrate the test method of catalyst wear performance provided by the present invention

[0044] (1) 10g of iron-based Fischer-Tropsch synthesis catalyst A and 600ml of liquid paraffin are filled in a 1L stirred tank reactor, and the diameter of the stirring paddle is about 5cm. h 2 and CO, the catalyst is first heated at 250°C with a space velocity of 5000h -1 , the ratio of hydrogen to carbon is 5.0, and the stirring speed is adjusted so that the tangential line speed is 1m / s and the reduction is 24h. Switch to 250°C after catalyst reduction, 2.3MPa, space velocity 8000h -1 , the hydrogen-to-carbon ratio is 3.0, and the stirring speed is adjusted so that the tangential line speed is 8m / s and the reaction is maintained for 200h.

[0045] (2) After the reaction is over, cool down to 130°C and reduce the pressure to normal pressure. After the stirring is stopped, quickly put the stirred tank body filled with the slurry in the still in an o...

Embodiment 2

[0048] This embodiment is used to illustrate the test method of catalyst wear performance provided by the present invention

[0049] The catalyst abrasion performance test was carried out according to the method of Example 1, except that the iron-based Fischer-Tropsch synthesis catalyst A was replaced by an equivalent amount of iron-based Fischer-Tropsch synthesis catalyst B.

[0050] The iron content in the sample was analyzed by inductively coupled plasma spectrometer (ICP), the results are shown in Table 1, and the experiment was repeated 3 times.

Embodiment 3

[0052] This embodiment is used to illustrate the test method of catalyst wear performance provided by the present invention

[0053] (1) 10g of iron-based Fischer-Tropsch synthesis catalyst C and 800ml of liquid paraffin are filled in a 1L stirred tank reactor, and the diameter of the stirring paddle is about 5cm. h 2 and CO, the catalyst is first heated at 250°C with a space velocity of 5000h -1 , the ratio of hydrogen to carbon is 5.0, and the stirring speed is adjusted so that the tangential line speed is 1m / s and the reduction is 24h. Switch to 280°C after catalyst reduction, 2MPa, space velocity 15000h -1 , the hydrogen-to-carbon ratio is 2.5, and the stirring speed is adjusted so that the tangential line speed is 10m / s and the reaction is maintained for 100h.

[0054] (2) After the reaction, cool down to 150°C, reduce the pressure to normal pressure, stop the stirring, and quickly place the stirred tank body containing the slurry in the kettle in an oven at 150°C for ...

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Abstract

The invention relates to the field of measurement of the wear rate of a catalyst, and particularly relates to a method for measuring the wear rate of a catalyst. The method comprises the steps of carrying out catalytic reaction on a gas-phase reaction raw material by using a solid-phase catalyst in a liquid-phase reaction medium at a tangential linear speed with the stirring strength of at least 5m / s to obtain reaction slurry; keeping the slurry in a liquid state, and carrying out solid-liquid separation on the slurry; analyzing the solid content of the separated liquid phase, and calculatingthe ratio 1 of the solid content to the amount of the added catalyst; analyzing the content of the elements from the catalyst in the separated liquid phase, and calculating the ratio 2 of the contentof the elements from the catalyst in the separated liquid phase to the content of the elements in the catalyst; and drying the separated solid phase, and determining the content of powder with the particle size of less than 20 microns in the dried product. According to the method, the strength of the catalyst is inspected under the reaction condition, the consumed time is short, physical abrasionand chemical abrasion can be considered at the same time, the repeatability of the test result is high, and the obtained test result has more guiding significance for industrial application of the catalyst.

Description

technical field [0001] The invention relates to the field of measuring catalyst wear rate, in particular to a method for measuring catalyst wear rate. Background technique [0002] Fischer-Tropsch synthesis is an important way for clean coal conversion, and the slurry bed Fischer-Tropsch synthesis process has gradually become the mainstream process of Fischer-Tropsch synthesis due to its advantages of good heat extraction and high production capacity. In slurry bed Fischer-Tropsch synthesis, solid catalyst particles are suspended in the liquid medium of the reactor, and the synthesis gas (H 2 +CO) react to generate hydrocarbon compounds, light hydrocarbons leave the reactor in the form of gas, and heavy hydrocarbons flow out of the reactor in liquid form after being separated from the solid catalyst particles through the filtering effect of the filter installed inside the reactor. [0003] In an industrial Fischer-Tropsch synthesis reactor, the solid catalyst is suspended i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/73G01N31/12G01N5/04G01N15/04G01N1/34
CPCG01N21/73G01N31/12G01N5/04G01N15/04G01N1/34
Inventor 张奉波孟祥堃门卓武胡云剑张琪王涛吕毅军李永龙
Owner CHNA ENERGY INVESTMENT CORP LTD