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Platinum-based catalyst taking hexagonal boron-carbon-nitrogen as carrier and preparation method of platinum-based catalyst

A platinum-based catalyst and boron carbon nitrogen technology, which is applied in the field of low-carbon alkane dehydrogenation catalyst preparation, can solve the problems of catalyst coking, sintering and high reaction temperature, and achieve the effect of high activity and stability

Active Publication Date: 2021-07-02
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the direct dehydrogenation reaction of propane, the typical feature of this type of reaction is that the reaction temperature is relatively high, and the reaction temperature is generally higher than 450 ° C, which is prone to coking, sintering and deactivation of the catalyst. Improving the stability of the catalyst for this type of reaction is important. Industry-recognized problems

Method used

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  • Platinum-based catalyst taking hexagonal boron-carbon-nitrogen as carrier and preparation method of platinum-based catalyst
  • Platinum-based catalyst taking hexagonal boron-carbon-nitrogen as carrier and preparation method of platinum-based catalyst
  • Platinum-based catalyst taking hexagonal boron-carbon-nitrogen as carrier and preparation method of platinum-based catalyst

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example 1

[0032] Preparation of catalyst of the present invention and performance evaluation of propane dehydrogenation

[0033] (1) Preparation of catalyst

[0034]1 g of boric acid, 3 g of melamine and 3 g of glucose were thoroughly ground with an agate mortar. The mixed precursors are then put into a horizontal tube furnace. Before heating, exhaust all the oxygen in the tube for about 30 minutes, calcinate at 950°C for 6 hours, and wash the obtained product with 0.1M HCl in hot water to obtain a hexagonal boron carbon nitrogen carrier. Take 0.5 g of hexagonal borocarbon nitrogen carrier, put it into 5 mL of chloroplatinic acid solution with a Pt content of 5 mg / mL and 5 mL of ethanol. Stir at 25°C for 3h, sonicate for 3h, stir for another 3h, completely evaporate the ethanol in the system to dryness at 80°C, and then dry at 80°C overnight. put it in N 2 Calcined at 500°C for 2h in the atmosphere to obtain catalyst A. The content of platinum element in catalyst A, the ratio of bo...

example 2

[0038] Prepare catalyst and carry out propane dehydrogenation reaction by the method for example 1, difference is (1) the quality of glucose in the step is 1g, the platinum element content in the catalyst B of making, used boric acid, melamine and glucose ratio and propane dehydrogenation The reaction results are shown in Table 1. The results of the 10-hour reaction are shown in Table 3.

example 3

[0040] Prepare catalyst by the method for example 1 and carry out propane dehydrogenation reaction, difference is (1) the quality of glucose in the step is 2g, the platinum element content in the catalyst C of making, used boric acid, melamine and glucose ratio and propane dehydrogenation The reaction results are shown in Table 1. The results of the 10-hour reaction are shown in Table 4.

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Abstract

The invention belongs to the field of preparation of low-carbon alkane dehydrogenation catalysts, and particularly relates to a platinum-based catalyst taking hexagonal boron-carbon-nitrogen as a carrier and a preparation method thereof. The catalyst specifically comprises 1.0-10.0% by mass of platinum and 90-99% by mass of hexagonal boron carbon nitrogen. The specific preparation method comprises the following steps: mixing a boron source, a nitrogen source and a carbon source according to a ratio of 1: 1-10: 1-10, roasting the mixture in inert gas at 900-1400 DEG C to obtain a hexagonal boron-carbon-nitrogen crude body, washing the hexagonal boron-carbon-nitrogen crude body with hydrochloric acid with a certain concentration to obtain a hexagonal boron-carbon-nitrogen pure body, dipping the hexagonal boron-carbon-nitrogen crude body with a platinum-containing compound solution, drying in inert gas, and reducing. The obtained catalyst is used for light alkane dehydrogenation reaction and has high activity and stability.

Description

technical field [0001] The invention belongs to the field of preparation of low-carbon alkane dehydrogenation catalysts, and in particular relates to a platinum series catalyst with hexagonal boron carbon nitrogen as a carrier and a preparation method thereof. Background technique [0002] Commonly used propane dehydrogenation catalysts are Pt-based and Cr-based catalysts. Among them, the active center Cr and its compounds of Cr-based catalysts are heavy metals, which are toxic and easy to pollute the environment, so their use is also subject to certain restrictions. Although Pt-based catalysts are relatively expensive, they have high activity and stability. [0003] The carrier is a solid that supports the active components in the catalyst. With the improvement of people's requirements for catalytic performance, there are more and more studies on supports. For the propane dehydrogenation reaction, supports with good thermal stability, high surface area and uniform pore st...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J32/00B01J37/02C07C5/333C07C11/06
CPCB01J27/24B01J37/0201C07C5/3337C07C11/06Y02P20/52
Inventor 刘杰王屹鸣王皓月刘传亮汪义香
Owner FUZHOU UNIV
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