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Preparation method of supported catalyst for circulating type catalytic reaction

A supported catalyst and catalytic reaction technology, applied in the field of catalysis, to achieve the effect of increasing the surface area

Inactive Publication Date: 2018-11-13
NANJING UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although significant progress has been made in the research of membrane catalysts, membrane catalysts are still far from practical applications, and the preparation of high-performance membrane catalysts is still a big challenge.

Method used

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  • Preparation method of supported catalyst for circulating type catalytic reaction
  • Preparation method of supported catalyst for circulating type catalytic reaction
  • Preparation method of supported catalyst for circulating type catalytic reaction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1 Pd / TiO 2 nanotube-modified Al 2 o 3 Preparation of ceramic membrane

[0031] (1) TiO 2 nanotube-modified Al 2 o 3 Preparation of ceramic membrane

[0032] The first step of hydrothermal: Measure 20 mL of deionized water and 20 mL of hydrochloric acid, mix and stir for 5 minutes, add 0.955 mL of tetrabutyl titanate (0.07 mol / L) and stir for 10 minutes to prepare a hydrothermal solution; ceramic membrane (diameter: 3.2 cm, material: Al 2 o 3 , membrane pore size: 3 μm) was placed vertically in a 50 mL hydrothermal kettle, poured into the hydrothermal solution, and carried out hydrothermal reaction at 150 °C for 5 h, and a layer of TiO was grown on the surface of the ceramic membrane. 2 Seed.

[0033] The second step of hydrothermal: Mix 20 mL of hydrochloric acid, 20 mL of deionized water, and 3 mL of NaCl solution with a concentration of 6.16 mol / L and stir for 5 min, add 0.955 mL of tetrabutyl titanate (0.07 mol / L) and stir for 10 min Configure a hyd...

Embodiment 2

[0042] Example 2 Pd / TiO 2 Nanotube-modified ZrO 2 Preparation of ceramic membrane

[0043] (1) TiO 2 Nanotube-modified ZrO 2 Preparation of ceramic membrane

[0044] The first step of hydrothermal: Measure 27 mL of deionized water and 13 mL of hydrochloric acid, mix and stir for 5 minutes, add 1.228 mL of tetrabutyl titanate (0.09 mol / L) and stir for 10 minutes to prepare a hydrothermal solution; ceramic membrane (diameter: 3.2 cm, material: ZrO 2 , membrane pore size: 50nm) was placed vertically in a 50 mL hydrothermal kettle, poured into the hydrothermal solution, and carried out hydrothermal reaction at 180 °C for 5 h, and a layer of TiO was grown on the surface of the ceramic membrane. 2 Seed.

[0045] The second step of hydrothermal: Mix 27 mL of deionized water, 13 mL of hydrochloric acid, and 3 mL of NaCl solution with a concentration of 4 mol / L and stir for 5 min, add 1.228 mL of tetrabutyl titanate (0.09 mol / L) and stir for 10 min Configure a hydrothermal solut...

Embodiment 3

[0053] Example 3 Pd / TiO 2 Nanotube-modified TiO 2 Preparation of ceramic membrane

[0054] (1) TiO 2 Nanotube-modified TiO 2 Preparation of ceramic membrane

[0055] The first step of hydrothermal: Measure 13 mL of deionized water and 27 mL of hydrochloric acid, mix and stir for 5 minutes, add 0.409 mL of tetrabutyl titanate (0.03 mol / L) and stir for 10 minutes, and prepare a hydrothermal solution; ceramic membrane (diameter: 3.2 cm, material: TiO 2 , membrane pore size: 800nm) was placed vertically in a 50 mL hydrothermal kettle, poured into the hydrothermal solution, and carried out hydrothermal reaction at 90 °C for 1 h, and a layer of TiO was grown on the surface of the ceramic membrane. 2 Seed.

[0056] The second step of hydrothermal: Mix 13 mL deionized water, 27 mL hydrochloric acid, and 3 mL NaCl solution with a concentration of 2 mol / L for 5 min, add 0.409 mL tetrabutyl titanate (0.03 mol / L) and stir for 10 min Configure a hydrothermal solution that will coat ...

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Abstract

The invention relates to a preparation method of a supported catalyst for circulating type catalytic reaction. The catalyst uses a ceramic membrane as a carrier. The preparation method comprises the following steps: growing TiO2 nanorods on the surface and in pore passages of a ceramic membrane by a two-step hydrothermal method, then etching the TiO2 nanorods into TiO2 nanotubes by a hydrochloricacid hydrothermal etching method, modifying through a silane coupling agent to introduce amino functional groups, and finally, loading Pd nanoparticles by a sol impregnation method to prepare the supported catalyst. The preparation method has the advantages that the surface and the pore passages of the ceramic membrane are modified through the TiO2 nanotubes, so that the surface area of the membrane catalyst can be expanded, more Pd nanoparticles are loaded on the surface and in the pore passages of the ceramic membrane, and the catalytic performance of the catalyst is improved; by virtue of the multiparous property of the ceramic membrane, the membrane catalyst can be used for forming a circulating type catalytic membrane reactor, the problem of difficult separation of the catalyst from aproduct is avoided, and the supported catalyst can be widely applied to the circulating type catalytic reaction process.

Description

technical field [0001] The invention relates to a method for preparing a supported catalyst, in particular to a method for preparing a catalyst used in a hydrogenation process, and belongs to the technical field of catalysis. Background technique [0002] Nano-catalysts have excellent catalytic performance due to their small particle size, large specific surface area, and many surface defects. However, in actual production and application, it is difficult to separate nanocatalysts from products, which limits their wide application. It is an effective solution to load nano-catalysts on the surface of the membrane and in the pores to prepare supported membrane catalysts. [0003] Membrane catalysts can increase the conversion rate and selectivity of the reaction, reduce the reaction temperature, save energy consumption, and have high application value in the field of catalytic industry. Due to the porous nature of the membrane, it constitutes a catalyst together with catalyt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/44B01J35/06B01J35/10
CPCB01J23/44B01J35/59B01J35/60
Inventor 陈日志缪建峰杜艳姜红唐文麒刘业飞邢卫红
Owner NANJING UNIV OF TECH
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