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Difunctional sulfur-resistant hydrogenation catalyst and preparation method thereof

A hydrogenation catalyst and dual-function technology, which is applied in the direction of catalyst activation/preparation, hydrogenation to hydrocarbons, molecular sieve catalysts, etc., can solve the problems of affecting the hydrogenation performance of the catalyst, the hydrogen overflow effect is not obvious, and it is not easy to precious metals, etc., to improve Anti-poisoning, high catalytic activity, avoiding coking effect

Inactive Publication Date: 2019-07-12
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Although Y and mordenite can be used as supports to prepare noble metal-loaded sulfur-resistant catalysts through the synergistic effect of shape selection and hydrogen overflow, their small pore size is not suitable for the hydrogenation of aromatics, especially fused-ring aromatics with large molecular sizes. There is a large diffusion limitation in the reaction, which seriously affects the hydrogenation performance of the prepared catalyst
In addition, when the loaded amount of precious metals is very low, it is not easy to load precious metals in cages with smaller orifices, and the hydrogen overflow effect is not obvious

Method used

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  • Difunctional sulfur-resistant hydrogenation catalyst and preparation method thereof
  • Difunctional sulfur-resistant hydrogenation catalyst and preparation method thereof
  • Difunctional sulfur-resistant hydrogenation catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Take 8.8wt% H 2 PtCl 6 Add 51 µL of aqueous solution to 10 mL of distilled water, stir well, add 1 g of H-SSZ-13 carrier, stir at 30 °C for 24 h, vacuum dry at 50 °C with a rotary evaporator, and bake at 350 °C for 4 h.

[0026] After the calcined product was placed in a hydrogen environment at 300° C. for 2 h and reduced, a bifunctional supported catalyst was obtained.

[0027] figure 1 The XRD characterization results of the catalysts prepared above are given. From figure 1 It can be seen that after loading Pt, calcination and reduction, the support structure of the catalyst has not changed, and still shows a strong SSZ-13 characteristic diffraction peak.

[0028] From figure 2 It can be seen from the TEM image of the catalyst that the Pt supported on the SSZ-13 carrier has a small particle size, about 1.3nm, and is distributed near the crystal edge and close to the orifice.

[0029] Add 0.25 g of naphthalene to the reaction kettle with 10 mL of cyclohexane, di...

Embodiment 2

[0038] 50ppm benzothiophene was added to the catalytic reaction system for hydrogenation of naphthalene in Example 1, and other conditions were the same as in Example 1. The concentration of naphthalene, tetrahydronaphthalene and decahydronaphthalene in the reaction solution is detected, and the conversion rate of naphthalene and the selectivity to tetrahydronaphthalene and decahydronaphthalene are calculated. The results are listed in Table 1.

[0039] It can be seen from the catalytic results that after adding 50 ppm benzothiophene, the catalytic activity of the catalyst prepared in Example 1 remains almost unchanged, which proves that the catalyst has good anti-sulfur activity.

Embodiment 3

[0047] Add 100ppm benzothiophene to the catalytic reaction system for hydrogenation of naphthalene in Example 1, and other conditions are the same as in Example 1. The concentration of naphthalene, tetrahydronaphthalene and decahydronaphthalene in the reaction solution is detected, and the conversion rate of naphthalene and the selectivity to tetrahydronaphthalene and decahydronaphthalene are calculated. The results are listed in Table 1.

[0048] As can be seen from the catalytic results in Table 1, compared with Example 1 and Example 2, with the increase of the sulfur content in the reaction system, although the conversion rate of the catalyst prepared with HSSZ-13 as the carrier is somewhat reduced, it still shows Relatively good catalytic activity and sulfur resistance.

[0049]

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Abstract

The invention discloses a difunctional sulfur-resistant hydrogenation catalyst which is prepared by dissolving a water-soluble salt of a noble metal into water, carrying out wet-method soaking with anH-SSZ-13 molecular sieve support, drying so as to obtain a catalyst precursor, firstly roasting in an air atmosphere at 300-450 DEG C, and by further carrying out reduction in the presence of hydrogen at 250-450 DEG C. The difunctional sulfur-resistant hydrogenation catalyst disclosed by the invention is applied to a hydrogenation catalysis reaction of polycyclic aromatic hydrocarbon, and has a good hydrogenation anti-sulfur effect.

Description

technical field [0001] The invention belongs to the technical field of catalyst preparation, and relates to a catalyst for hydrogenation reaction, in particular to a catalyst for hydrogenation reaction of aromatic hydrocarbons with an anti-sulfurization function, and a preparation method of the catalyst. Background technique [0002] As crude oil becomes heavier and worse, the content of polycyclic aromatics in diesel produced by catalytic cracking is getting higher and higher. The existence of a large amount of fused aromatic hydrocarbons not only causes a large amount of black smoke when diesel is burned, which affects the environment, but also reduces the cetane number of diesel oil, which cannot meet the requirements of environmental protection and the automobile industry for the content of aromatics in diesel oil and cetane number. Require. [0003] Therefore, improving and upgrading the quality of catalytic cracking diesel oil is an important issue faced by petroleum ...

Claims

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Application Information

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IPC IPC(8): B01J29/74B01J37/08B01J37/18B01J37/02C07C5/11C07C13/48C07C13/50
CPCB01J29/743B01J37/0201B01J37/082B01J37/18B01J2229/18C07C5/11C07C2602/10C07C13/48C07C13/50
Inventor 范彬彬牛盼盼史秀锋路宁悦闫晓亮李瑞丰
Owner TAIYUAN UNIV OF TECH
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