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Dehydrogenation catalyzing material as well as preparation method and application thereof

A catalytic material and dehydrogenation technology, applied in the direction of chemical instruments and methods, hydrocarbons, hydrocarbons, etc., can solve the problems of poor catalyst activity and stability, achieve reduced deactivation rate, high propane dehydrogenation activity, inhibit enrichment effect

Active Publication Date: 2014-05-28
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the activity and stability of the catalyst are still poor

Method used

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  • Dehydrogenation catalyzing material as well as preparation method and application thereof
  • Dehydrogenation catalyzing material as well as preparation method and application thereof
  • Dehydrogenation catalyzing material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0092] Prepare the propane dehydrogenation catalytic material according to the following steps:

[0093] Weigh 8g of P123 into a 500ml beaker, then add 60ml of deionized water, 240ml of 2mol / L hydrochloric acid, and stir at 40°C for 4h. 17g of TEOS was slowly added dropwise and continued to stir vigorously at 40°C for 24h. The obtained white turbid liquid was transferred into a high-pressure reactor with a polytetrafluoroethylene inner sleeve, crystallized at 100°C for 48 hours, cooled, washed, and dried. The obtained white solid was calcined at 550° C. for 6 h with a heating rate of 2° C. / min, and the obtained solid was the SBA-15 carrier. Small-angle X-ray (SAXRD) and N 2 Adsorption-desorption isotherm characterization, the spectrum is as follows figure 1 shown by figure 1 It can be seen that the prepared SBA-15 carrier has a regular two-dimensional hexagonal mesoporous channel structure.

[0094] 0.013g chloroplatinic acid, 0.03g SnCl 4 ·5H 2 O, 0.042g of aluminum ni...

Embodiment 2

[0097] The synthesis steps of the SBA-15 carrier are shown in Example 1, and the calcination time is 8 hours.

[0098] 0.026g chloroplatinic acid, 0.059g SnCl 4 ·5H 2 O, 0.025g aluminum chloride was dissolved in a certain amount of deionized water, then added SBA-15 carrier, ultrasonicated for 60min, dried in an oven at 40°C for 24h, and then roasted at 500°C for 6h, before propane dehydrogenation reaction, the Catalytic material at 550°C H 2 Medium treatment 2h. Among them, platinum, tin, and aluminum loadings are 1wt%, 2wt%, and 0.5wt%, respectively. The specific surface area of ​​the catalytic material is 738.2m 2 / g.

[0099] The evaluation of propane dehydrogenation performance of the catalytic material is the same as in Example 1. Under the reaction condition of 590°C, the initial propane conversion rate of the catalytic material is 51.2%, the initial yield of propylene is 50.5%, and the high propane conversion rate is still 39.1% after 6 hours of reaction , the se...

Embodiment 3

[0101] The synthesis steps of the SBA-15 carrier are shown in Example 1, and the crystallization temperature is 120°C.

[0102] 0.13g chloroplatinic acid, 0.29g SnCl 4 ·5H 2 O, 0.14g of aluminum nitrate was dissolved in a certain amount of deionized water, and then SBA-15 carrier was added, ultrasonicated for 30min, dried in an oven at 40°C for 12h, and then roasted at 550°C for 4h. Before the propane dehydrogenation reaction, the catalytic material H at 400°C 2 Medium treatment 10h. Wherein, platinum, tin, and aluminum are loaded in amounts of 5wt%, 10wt%, and 1wt%, respectively. The specific surface area of ​​the catalytic material is 713.9m 2 / g.

[0103] The evaluation of propane dehydrogenation performance of the catalytic material is the same as that in Example 1. The catalytic material has an initial propane conversion rate of 41.5% and a propylene yield of 40.9% at a reaction temperature of 590°C. After 6 hours of reaction, the conversion rate is still high at 35....

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Abstract

The invention provides a dehydrogenation catalyzing material as well as a preparation method and application thereof. The dehydrogenation catalyzing material comprises the following components by weight: 0.5-5% of platinum element, 1-10% of IVA metal, 0.1-1% of Al and the balance of mesoporous silicon material, wherein the mesoporous silicon material serves as a carrier, the platinum element serves as a catalyst, the IVA metal serves as a first auxiliary and the Al serves as a second auxiliary. Compared with a multiple dipping method, the preparation method has the advantages that the active components and auxiliary elements are dipped and carried on the mesoporous silicon carrier in one step, so that the preparation method is simple in operation and short in preparation cycle; molecules of the active components and auxiliaries of the catalytic material obtained through one-step dipping are in fuller contact, which is beneficial to inhibit the enrichment of carbon on the active components, so that the deactivation rate is reduced and the stability of the catalytic material is increased.

Description

technical field [0001] The invention belongs to the catalyst preparation technology in the technical field of industrial catalysis. Specifically, the present invention relates to a dehydrogenation catalytic material and its preparation method and application. More specifically, the present invention relates to a catalyst containing SBA-15 as a carrier The invention discloses a catalyst material for producing propylene from platinum-based propane dehydrogenation with an aluminum additive, a preparation method and application thereof, and is suitable for gas-solid phase catalytic reactions. Background technique [0002] Propylene is an important organic raw material second only to ethylene, and is mainly used in the production of chemical products such as polypropylene, acrylonitrile, propylene oxide, acrylic acid, acrolein, phenol and octyl alcohol. In recent years, with the rapid development of my country's petrochemical industry, the demand for propylene has risen linearly....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/03C07C5/333C07C11/06
CPCY02P20/52
Inventor 李建梅赵震范晓强刘坚韦岳长段爱军姜桂元
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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