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Production art of cellular catalyst carrier using natural zeolite as principal raw material

A kind of honeycomb catalyst, technology of natural zeolite

Inactive Publication Date: 2009-12-02
胡琳
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The cordierite (Mg 2 Al 4 Si 5 o 18 ) to make a honeycomb catalyst carrier, both of which are two-step production methods. Not only the process is complicated, but the production cost is high, and the alumina coating is easy to peel off, causing the activity to be lost, affecting the use effect and life

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Take 30kg of 200-mesh zeolite powder treated with dilute hydrochloric acid with a molar concentration of 2.5mol / L, put it into a mixer, start the mixer and add 15kg of pottery clay, 4kg of mixed rare earth oxides, 2kg of methylcellulose and 2kg of water in sequence, and mix thoroughly uniform. Put the mixture into a vacuum kneader, knead repeatedly and put it into a mold to extrude into a honeycomb shape. Put the formed honeycomb body into the activation furnace, raise the temperature to 100°C at a heating rate of 5°C / min and keep the furnace temperature for 3 hours, after it is fully baked, slowly increase the furnace temperature to 600°C, and keep the temperature for 4 hours , and then cooled to room temperature to obtain a yellowish honeycomb carrier. Measure the various indicators of the product, and the overall size is 50×50×50mm 3 , the pore diameter is 1.5mm, and the pore density is 27 / cm 2 , the channel wall thickness is 0.35-0.40mm, the free cross-sectional ...

Embodiment 2

[0023] Use the same operation as in Example 1, except that the baking temperature is controlled at 200°C for 2 hours. Finally, the various indicators of the product are measured, and the obtained data parameter indicators are within the control range.

Embodiment 3

[0025] With the same operation as Example 1, the difference is to adjust the proportioning of each component. Get 40kg of 200-mesh zeolite powder treated with dilute hydrochloric acid, 10kg of clay, 3kg of mixed rare earth oxides, 2kg of methyl cellulose, and 2kg of water. Finally, the various indicators of the product are measured, and the obtained data parameter indicators are within the control range.

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PUM

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Abstract

A high-efficiency honeycomb-shaped catalyst carrier production process, characterized in that the natural zeolite is crushed into powder, injected with dilute hydrochloric acid and stirred evenly, after standing still, the zeolite powder is rinsed with water to neutrality; clay, mixed rare earth oxidation are added to the zeolite powder After mixing evenly, put it into a vacuum kneader to fully bond and extrude it into a honeycomb semi-finished product through a mold. Put the honeycomb (made) semi-finished product into the activation furnace, dry it at low temperature, then raise the temperature to 500°C-600°C, and wait for it to cool to become the finished honeycomb catalyst carrier. The invention has the advantages of simple preparation process, low cost and energy consumption, and the finished carrier product has good adsorption performance and metal cation exchange performance, which can greatly reduce the usage of rare and precious metals in the active components of the catalyst and improve the catalytic conversion rate.

Description

technical field [0001] The invention relates to a manufacturing process of a high-efficiency honeycomb catalyst carrier, in particular to a manufacturing process of a honeycomb catalyst carrier with natural zeolite as the main raw material, and belongs to the technical field of manufacturing inorganic and solid material chemistry. Background technique [0002] The catalyst carrier is the support of the catalyst material. The catalyst material is coated on its surface and together with the catalyst to form various catalytic devices, which are widely used in chemical industry, environmental protection, thermal power generation and other industries, such as automobile exhaust purifier. In order to improve the performance of the catalyst, the specific surface area of ​​the carrier must be enlarged, usually made into a honeycomb shape. [0003] At present, most of the honeycomb catalyst supports commonly used in the market are based on cordierite (Mg 2 al 4 Si 5 o 18 ) as the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/06B01J35/04
Inventor 胡琳胡珺
Owner 胡琳
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