Catalyst for improving performance of methane oxygen-free aromatization reaction and preparation method thereof

A technology of reaction performance and catalyst, applied in the direction of catalyst activation/preparation, carbon compound catalyst, physical/chemical process catalyst, etc., can solve the problems of reducing catalyst wear resistance, harsh conditions, time-consuming and labor-intensive, etc., and improve the resistance to carbon deposition. The performance, the conditions are easy to meet, and the economic effect is high

Active Publication Date: 2021-06-18
NORTHWEST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when adding active metals, precious metal components are often added, which increases the cost, and the modification and reprocessing steps are often cumbersome, requiring repeated modification of molecular sieves, which is time-consuming and laborious; the synthesis of hollow HZSM-5, nano-HZSM-5, nuclear Shell-type HZSM-5 also needs to add expensive soft and hard templates to create pores, which not only has harsh conditions, but also reduces the wear resistance of the catalyst in the fluidized bed, making it difficult to apply in subsequent industrialization

Method used

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  • Catalyst for improving performance of methane oxygen-free aromatization reaction and preparation method thereof
  • Catalyst for improving performance of methane oxygen-free aromatization reaction and preparation method thereof
  • Catalyst for improving performance of methane oxygen-free aromatization reaction and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0042] Take 0.26g of ammonium molybdate tetrahydrate in a 25ml beaker, add 1.1ml of deionized water, seal it and disperse the solution evenly with 32KHZ ultrasonic for 20min; then add dry 2g of HZSM-5 zeolite, stir for 15min, and place it at room temperature for 24h, The ammonium molybdate solution was uniformly impregnated in the zeolite channels, and then dried in a blast drying oven at 80°C, weighed 0.4g of dried melamine and mixed with the above catalyst precursor solidly, ground in a mortar for 15min, and then placed In a pyrolysis furnace under a nitrogen atmosphere at a heating rate of 2°C / min, it was raised to 550°C for 6 hours to obtain a finished amination catalyst with a loading capacity of 6% Mo / HZSM-5-CN (20%).

Embodiment 2

[0044]Take 0.26g of ammonium molybdate tetrahydrate into a 25ml beaker, add 1.1ml of deionized water, seal the seal and disperse the solution evenly with 32KHZ ultrasound for 20min; then add dry 2g of HZSM-5 zeolite, stir for 15min, place at room temperature for 24h, Evenly impregnate the ammonium molybdate solution in the zeolite channels, and then dry it in a blast drying oven at 80°C for use. Weigh 0.4g of dried melamine and add it to 1.5ml of methanol solution, ultrasonically disperse for 30min, and mix the above two Evenly, after standing at room temperature for 24 hours, dry at 60°C, and then place it in a pyrolysis furnace under a nitrogen atmosphere at a heating rate of 2°C / min to 550°C for 6 hours to obtain a loading capacity of 6% Mo / HZSM - 5-CN (20%) finished amination catalyst.

Embodiment 3

[0046] Take 0.26g of ammonium molybdate tetrahydrate into a 25ml beaker, add 1.1ml of deionized water, seal the seal and disperse the solution evenly with 32KHZ ultrasound for 20min; then add dry 2g of HZSM-5 zeolite, stir for 15min, place at room temperature for 24h, Evenly impregnate the ammonium molybdate solution in the zeolite channels, and then dry it in a blast drying oven at 80°C for use. Weigh 0.1g of dried melamine and add it to 1.5ml of methanol solution, ultrasonically disperse for 30min, and mix the above two Evenly, after standing at room temperature for 24 hours, dry at 60°C, and then place it in a pyrolysis furnace under a nitrogen atmosphere at a heating rate of 2°C / min to 550°C for 6 hours to obtain a loading capacity of 6% Mo / HZSM - 5-CN (5%) finished amination catalyst.

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Abstract

The invention discloses a catalyst for improving the performance of methane anaerobic aromatization reaction and a preparation method thereof. Firstly, the carrier molecular sieve and the auxiliary drop melamine are dried for standby; then ammonium molybdate tetrahydrate is dissolved in deionized water Ultrasonic dispersion, the volume of deionized water is the saturated water absorption of the carrier molecular sieve, then impregnate the carrier molecular sieve with this solution, stir and mix evenly, dry after impregnating at room temperature, and obtain the catalyst precursor for later use; then weigh melamine, mix with the catalyst precursor The method of solid-solid mixing or solution mixing and evaporation is adopted to fully mix the two; the mixture is heated and roasted under nitrogen or air atmosphere to obtain a catalyst for improving the performance of methane anaerobic aromatization reaction. The preparation method of the invention is simple, the raw materials are easy to obtain, green and efficient, high in economic benefit, and easy to meet the needs of industrialized production.

Description

technical field [0001] The invention belongs to the technical field of energy and chemical catalysts, and in particular relates to a catalyst for improving the performance of methane anaerobic aromatization reaction and a preparation method thereof. Background technique [0002] Aromatic hydrocarbons are an important organic reaction intermediate in the petroleum industry, and are widely used in many industries such as medicine, military industry, materials, and daily cosmetics. At present, the main source of aromatics still relies on traditional processes such as catalytic reforming in petrochemical industry. However, China's oil resources are short and its dependence on foreign countries remains high. Therefore, the development of a new aromatics preparation technology has great practical significance for the national energy strategy and security. In 1993, Wang Shenglin of Dalian Institute of Chemical Physics proposed for the first time that methane could be directly and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/48B01J29/78B01J27/24B01J37/02B01J37/08C07C2/76C07C15/02
CPCB01J27/24B01J29/48B01J29/7876B01J37/0201B01J37/082B01J2229/186C07C2/76C07C2529/48C07C2529/78C07C15/02
Inventor 马晓迅韩运达骆嘉钦彭志威
Owner NORTHWEST UNIV
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