Metal-modified hollow HZSM-5 catalyst for aromatization of glycerin and preparation method of metal-modified hollow HZSM-5 catalyst

A HZMS-5, metal modification technology, which is applied in the field of fine chemicals, can solve the problems of short catalyst life and achieve the effect of simple modification method, easy control of loading capacity and easy control of parameters

Pending Publication Date: 2021-11-16
SOUTHEAST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] Purpose of the invention: Although the existing HZSM-5 molecular sieve can improve its glycerin aromatization catalytic activity by loading metal elements, it is difficult to solve the problem of too short catalyst life due to the coking of reactants and products on the surface of the catalyst. In order to solve the above Technical problem, the present invention provides the metal-modified hollow HZSM-5 molecular sieve catalyst that is used for glycerin aromatization; Another purpose of the present invention is to provide its preparation method

Method used

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  • Metal-modified hollow HZSM-5 catalyst for aromatization of glycerin and preparation method of metal-modified hollow HZSM-5 catalyst
  • Metal-modified hollow HZSM-5 catalyst for aromatization of glycerin and preparation method of metal-modified hollow HZSM-5 catalyst
  • Metal-modified hollow HZSM-5 catalyst for aromatization of glycerin and preparation method of metal-modified hollow HZSM-5 catalyst

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Experimental program
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Effect test

Embodiment 1

[0026] Mix 10g of HZSM-5 powder with 10% (mass percent) tetrapropylammonium hydroxide solution at a ratio of 10mL / g, then heat in a hydrothermal kettle at 180°C for 24h, then filter, wash, and dry at 100°C for 12h , Calcined at 540°C for 6h to obtain hollow HZSM-5. Mix 5g of hollow HZSM-5 with 10mL of 5% (mass fraction) zinc nitrate solution, sonicate for 5 minutes, let stand for 12 hours, then filter, wash, dry overnight, and roast at 500°C for 3 hours to obtain Zn-modified Hollow HZSM-5 molecular sieve catalyst, the catalyst TEM characterization results are as attached figure 1 As shown in (a), the hollow structure of the catalyst can be clearly seen, and the XRD characterization results are shown in the attached figure 2 As shown in the Zn / Holl-HZSM-5 curve, it can be seen that the catalyst has the characteristic peak of HZSM-5, and the result of ICP-AES shows that the content of Zn in the catalyst is 1.1%.

Embodiment 2

[0028] Mix 10g of HZSM-5 powder with 1% (mass percent) tetrapropylammonium hydroxide solution at a ratio of 20mL / g, then place in a hydrothermal kettle and heat at 200°C for 72h, then filter, wash, and dry at 100°C for 12h , Calcined at 540°C for 6h to obtain hollow HZSM-5. Mix 5g of hollow HZSM-5 with 20mL of 3% (mass fraction) tin chloride solution, sonicate for 30 minutes, let stand for 48 hours, then filter, wash, dry overnight, and bake at 500°C for 3 hours to obtain Sn-modified The hollow HZSM-5 molecular sieve catalyst. The TEM characterization results of the catalyst are attached figure 1 As shown in (b), the hollow structure of the catalyst can be clearly seen, and the XRD characterization results are shown in the attached figure 2 As shown in the Zn / Holl-HZSM-5 curve, it can be seen that the catalyst has the characteristic peak of HZSM-5, and the result of ICP-AES shows that the content of Sn in the catalyst is 1.2%.

Embodiment 3

[0030] Mix 10g of HZSM-5 powder with 50% (mass percent) tetrapropylammonium hydroxide solution at a ratio of 2mL / g, then place in a hydrothermal kettle and heat at 120°C for 4h, then filter, wash, and dry at 100°C for 12h , Calcined at 540°C for 6h to obtain hollow HZSM-5. Mix 5g of hollow HZSM-5 with 20mL of 15% (mass fraction) lanthanum nitrate mixed solution, sonicate for 15 minutes, let stand for 24 hours, then filter, wash, dry overnight, and roast at 500°C for 3 hours to obtain La modified The hollow HZSM-5 molecular sieve catalyst. The TEM characterization results of the catalyst are attached figure 1 As shown in (c), the hollow structure of the catalyst can be clearly seen, and the XRD characterization results are shown in the attached figure 2 As shown in the La / Holl-HZSM-5 curve, it can be seen that the catalyst has the characteristic peak of HZSM-5, and the result of ICP-AES shows that the content of La in the catalyst is 5.8%.

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Abstract

The invention discloses a metal modified hollow HZSM-5 catalyst for glycerol aromatization and a preparation method, and belongs to the technical field of fine chemicals, the catalyst is HZSM-5 molecular sieve hollow particles, and metal is loaded on the surface of a molecular sieve skeleton or embedded in the molecular sieve skeleton. The metal modified hollow HZSM-5 molecular sieve catalyst retains the skeleton and pore structure of the HZSM-5 molecular sieve, the hollow structure widens the internal space and the overall specific surface area, carbon deposition on the catalyst can be effectively inhibited, and the service life of the catalyst in a glycerin aromatization reaction is obviously prolonged.

Description

technical field [0001] The invention belongs to the technical field of fine chemicals, and in particular relates to a metal-modified hollow HZSM-5 molecular sieve catalyst used for glycerin aromatization and a preparation method thereof. Background technique [0002] Benzene, toluene, xylene and other light aromatics (BTX) are basic organic chemical raw materials, which are widely used in synthetic fibers, synthetic resins, synthetic rubbers and various fine chemicals. whole reaction. Glycerol is an ideal renewable resource, which is a by-product of biodiesel production by transesterification. The selective production of high value-added aromatics through the aromatization reaction of glycerol can not only reduce my country’s oil dependence, but also expand the profits of biodiesel-related industrial chains, and step into the road of sustainable development, which is also in line with the development of green chemistry. The direction is of great significance to the developm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/40B01J29/46C10G3/00
CPCB01J29/405B01J29/46C10G3/44C10G3/45C10G3/49B01J2229/186Y02P30/20
Inventor 高李璟束逸逍肖国民雷严岳倩倩魏瑞平张进潘晓梅
Owner SOUTHEAST UNIV
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