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Synthesis of spherical Fe-MCM-48 mesoporous material and preparation of catalytic combustion catalyst loaded with Ag of spherical Fe-MCM-48 mesoporous material

A fe-mcm-48, mesoporous material technology, applied in physical/chemical process catalysts, catalyst carriers, molecular sieve catalysts, etc., can solve the problem of narrow utilization range and achieve the effect of good catalytic performance

Inactive Publication Date: 2011-05-04
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing published MCM-48 with regular morphology is often pure silicon type, and its application range is relatively narrow.

Method used

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  • Synthesis of spherical Fe-MCM-48 mesoporous material and preparation of catalytic combustion catalyst loaded with Ag of spherical Fe-MCM-48 mesoporous material
  • Synthesis of spherical Fe-MCM-48 mesoporous material and preparation of catalytic combustion catalyst loaded with Ag of spherical Fe-MCM-48 mesoporous material
  • Synthesis of spherical Fe-MCM-48 mesoporous material and preparation of catalytic combustion catalyst loaded with Ag of spherical Fe-MCM-48 mesoporous material

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Experimental program
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Effect test

example 1

[0026] At room temperature, dissolve CTAB and Tx-100 in deionized water and stir to mix, then add water glass and ferric sulfate under stirring, continue to stir to form a homogeneous mixture, transfer this mixture into a reaction kettle, and crystallize in an oven at 100°C After 2 days, take it out, filter it with suction, wash it with deionized water, and dry it at 70°C to obtain a synthetic raw powder. After directly roasting the synthetic raw powder at 500°C for 4 hours in the air, you can get a spherical Fe-MCM-48 mesoporous molecular sieve sample . Typical XRD patterns, TEM photos, and SEM spectra are shown in Figure 1 ~ Figure 3 .

example 2

[0028] By equal volume impregnation method, 10% AgNO 3 Loaded on the spherical Fe-MCM-48 mesoporous molecular sieve, after standing overnight, calcined at 500°C for 3h, the spherical Fe-MCM-48 supported Ag catalytic combustion catalyst was obtained. The benzene catalytic combustion activity of this sample is shown in Table 1.

example 3

[0030] After the above-mentioned Ag / Fe-MCM-48 powder was pressed into tablets and sieved, 0.1 g of a 40-60 mesh sample was taken and placed in the center of a quartz tube fixed-bed reactor with an inner diameter of 6 mm for activity evaluation. Components were detected by FID. Air is the balance gas, the initial concentration of benzene is 1000PPM, and the space velocity is 100000h -1 .

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Abstract

In the invention, cheap sodium silicate which is sold in the market is used as the silicon source, common inorganic iron salt is used as the iron source and cationic surfactant cetyl trimethyl ammonium bromide (CTAB) and nonionic surfactant p-octyl polyethylene phenyl ether (Tx-100) are used as the co-template agent in a hydrothermal system to prepare Fe-MCM-48 mesoporous molecular sieve of a regular spherical structure. The prepared material is used as the carrier to load a catalyst prepared from precious metal silver which is relatively cheap, thus the obtained catalyst has better catalytic activity in the catalytic combustion reaction of benzene. The preparation method in the invention has advantages of simple operation, low cost, high activity.

Description

1. Technical field [0001] The present invention uses the cheap water glass sold in the market as silicon source, takes conventional inorganic iron salt as iron source, and in hydrothermal system, uses cationic surfactant cetyltrimethylammonium bromide (CTAB) and nonionic The active agent polyethylene glycol octylphenyl ether (Tx-100) was used as a co-template agent to prepare Fe-MCM-48 mesoporous molecular sieves with regular spherical structure. The catalyst prepared by loading Ag on the material showed good catalytic performance in the catalytic combustion of benzene. 2. Background technology [0002] Since the emergence of mesoporous molecular sieves represented by the M41s series in the early 1990s, this type of material has been used in analysis, petroleum and fine It has been widely used in chemical industry and carrier materials. Compared with mesoporous molecular sieves with irregular morphology, mesoporous molecular sieve materials with regular morphology have mor...

Claims

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Application Information

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IPC IPC(8): B01J32/00B01J29/88B01D53/86B01D53/72
Inventor 赵伟齐涛王丽娜初景龙曲景奎黎少华
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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