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Long-life low-platinum bimetallic catalyst for methylcyclohexane and preparation method of long-life low-platinum bimetallic catalyst

A bimetallic catalyst and methylcyclohexane technology are applied in the field of long-life and low-platinum bimetallic catalysts and their preparation, which can solve the problems of rapid catalyst deactivation, high precious metal content, short life and the like, and achieve low cost and precious metal content. Low, life-extending effect

Pending Publication Date: 2022-02-08
CHINA TIANCHEN ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the main problems of dehydrogenation catalysts are that the catalyst deactivates quickly, the high content of precious metals leads to high cost, and short service life.

Method used

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  • Long-life low-platinum bimetallic catalyst for methylcyclohexane and preparation method of long-life low-platinum bimetallic catalyst
  • Long-life low-platinum bimetallic catalyst for methylcyclohexane and preparation method of long-life low-platinum bimetallic catalyst

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Embodiment 1

[0031] A preparation method for a long-life low platinum bimetallic catalyst for methylcyclohexane, comprising the steps,

[0032] (1) Add γ-Al 2 o 3 Add to tube furnace, pass H into the tube furnace 2 , heated up to 100°C and purged for 2 hours to obtain activated γ-Al 2 o 3 carrier;

[0033] (2) A certain amount of chloroplatinic acid and nickel nitrate (by Pt loading 0.1%, Ni loading 1%) are dissolved in a certain amount of water, the mass fraction of the total mass of the compound containing Pt and Ni in the solution is 5% , adjust its pH value to 5 with citric acid;

[0034] (3) The obtained activated γ-Al 2 o 3 The carrier was added to the above aqueous solution, mixed evenly, and aged at room temperature for 12 hours. The product was dried in an air atmosphere at 120° C. for 12 hours, crushed and then pressed into tablets. Calcined in air atmosphere at 400°C for 4 hours to prepare the catalyst.

Embodiment 2

[0036] A preparation method for a long-life low platinum bimetallic catalyst for methylcyclohexane, comprising the steps,

[0037] (1) Add γ-Al 2 o 3 Add to tube furnace, pass H into the tube furnace 2 , heated to 120°C and purged for 2 hours to obtain activated γ-Al 2 o 3 carrier;

[0038] (2) A certain amount of chloroplatinic acid and nickel nitrate (by Pt loading 0.1%, Ni loading 1%) are dissolved in a certain amount of water, the mass fraction of the total mass of the compound containing Pt and Ni in the solution is 5% , adjust its pH value to 5 with citric acid;

[0039] (3) The obtained activated γ-Al 2 o 3 The carrier was added to the above aqueous solution, mixed evenly, and aged at room temperature for 12 hours. The product was dried in an air atmosphere at 120° C. for 12 hours, crushed and then pressed into tablets. Calcined in air atmosphere at 400°C for 4 hours to prepare the catalyst.

Embodiment 3

[0041] A preparation method for a long-life low platinum bimetallic catalyst for methylcyclohexane, comprising the steps,

[0042] (1) Add γ-Al 2 o 3 Add to tube furnace, pass H into the tube furnace 2 , heated up to 100°C and purged for 2 hours to obtain activated γ-Al 2 o 3 carrier;

[0043] (2) A certain amount of chloroplatinic acid and nickel nitrate (by Pt loading 0.08%, Ni loading 1%) are dissolved in a certain amount of water, the mass fraction of the total mass of the compound containing Pt and Ni in the solution is 5% , adjust its pH value to 5 with citric acid;

[0044] (3) The obtained activated γ-Al 2 o 3 The carrier was added to the above aqueous solution, mixed evenly, and aged at room temperature for 12 hours. The product was dried in an air atmosphere at 120° C. for 12 hours, crushed and then pressed into tablets. Calcined in air atmosphere at 400°C for 4 hours to prepare the catalyst.

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Abstract

The invention provides a long-life low-platinum bimetallic catalyst for methylcyclohexane and a preparation method of the long-life low-platinum bimetallic catalyst.The catalyst comprises a main catalyst, a cocatalyst and a catalyst carrier, wherein the main catalyst is Pt, the cocatalyst is Ni, the catalyst carrier is sulfur-containing gamma-Al2O3, the mass content of the main catalyst Pt is 0.05-0.2% of the total catalyst amount, and the mass content of the cocatalyst Ni is 0.1-2% of the total catalyst amount. The catalyst provided by the invention has the advantages of simple preparation steps, mild preparation conditions, low content of the required noble metal Pt and lower cost, and the catalyst has a service life of more than 5000 hours when being applied to a reaction system for dehydrogenation of methylcyclohexane.

Description

technical field [0001] The invention belongs to the technical field of chemical hydrogen storage, and in particular relates to a long-life low-platinum bimetallic catalyst for methylcyclohexane and a preparation method thereof. Background technique [0002] Hydrogen is a clean, efficient and environmentally friendly secondary energy source. It has received widespread attention since the last century and is regarded as the most promising clean energy source in the future. my country already has a good industrial base for hydrogen production and is rich in hydrogen resources. The storage and transportation of hydrogen are still the key problems restricting the large-scale application of hydrogen energy. It is urgent to find a large-scale hydrogen storage technology with low energy consumption, high hydrogen storage density, and safe operation and transportation under normal temperature and pressure. Among the commonly used hydrogen storage technologies, liquid organic hydroge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89B01J35/00B01J37/00B01J37/02C01B3/00C07C5/367C07C15/06
CPCB01J23/892B01J37/0018B01J37/0207C07C5/367C01B3/0015B01J35/393B01J35/394C07C15/06Y02E60/32Y02P20/52
Inventor 刘喆王绍伟杨光王聪刘新伟
Owner CHINA TIANCHEN ENG
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