Preparation method for metal salt/gamma-Al2O3 heat accumulating type catalyst carrier

A technology of catalyst carrier and metal salt, which is applied in the direction of catalyst carrier, physical/chemical process catalyst, chemical instrument and method, etc., to achieve the effects of enhancing mechanical properties, increasing stability, and improving the ability to resist sintering

Active Publication Date: 2015-06-03
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention proposes to use γ-Al 2 o 3 Catalyst carrier and metal salt are compounded by a special process to obtain a regenerative catalyst carrier with high heat storage density, rapid heat absorption and release, and adaptable to various reactions, which is a new idea to solve hot spots in the catalytic reaction process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Preparation of alumina support: Dissolve 10 g of aluminum nitrate in 15 mL of deionized water at room temperature, and slowly add dilute ammonia water with a mass concentration of 3.5% into the aluminum nitrate solution dropwise while stirring until aluminum hydroxide gel is formed; Then the aluminum hydroxide gel was washed and centrifuged three times with distilled water to remove NO in the gel. 3 - and NH 4 + Then add 5 mL of concentrated nitric acid with a mass fraction of 65% to the aluminum hydroxide gel, stir at a speed of 300 rpm for 10 min, place it in an oven at 120°C and heat it to light blue to obtain aluminum sol , the alumina carrier;

[0028] (2) Preparation and modification of polystyrene microspheres: Prepare materials according to the following ratio: distilled water 150mL, emulsifier sodium p-styrenesulfonate 0.0425g, initiator K 2 S 2 o 8 0.0833g, buffer NaHCO 3 0.0833g and styrene 18.3mL, distilled water, sodium p-styrenesulfonate and buf...

Embodiment 2

[0032] (1) Preparation of alumina carrier: Dissolve 15g of aluminum nitrate in 25mL of deionized water at room temperature, and slowly add dilute ammonia water with a mass concentration of 3.5% into the aluminum nitrate solution dropwise while stirring until aluminum hydroxide gel is formed; Then the aluminum hydroxide gel was washed and centrifuged four times with distilled water to remove NO in the gel. 3 - and NH 4 + Then add 2 mL of concentrated nitric acid with a mass fraction of 65% to the aluminum hydroxide gel, stir at a speed of 400 rpm for 15 min, place it in an oven at 110°C and heat it until it becomes transparent to obtain an aluminum sol, namely Alumina carrier;

[0033] (2) Preparation and modification of polystyrene microspheres: Prepare materials according to the following ratio: distilled water 150mL, emulsifier sodium p-styrenesulfonate 0.0425g, initiator K 2 S 2 o 8 0.0833g, buffer NaHCO 3 0.0833g and styrene 18.3mL, distilled water, sodium p-styrene...

Embodiment 3

[0037] (1) Preparation of alumina support: Dissolve 30g of aluminum nitrate in 60mL of deionized water at room temperature, and slowly add dilute ammonia water with a mass concentration of 3.5% into the aluminum nitrate solution dropwise while stirring until aluminum hydroxide gel is formed; The aluminum hydroxide gel was washed and centrifuged five times with distilled water to remove NO in the gel. 3 - and NH 4 + Then add 1 mL of concentrated nitric acid with a mass fraction of 65% to the aluminum hydroxide gel, stir at a speed of 200 rpm for 20 min, place it in an oven at 100°C and heat it to light blue to obtain aluminum sol , the alumina carrier;

[0038] (2) Preparation and modification of polystyrene microspheres: Prepare materials according to the following ratio: distilled water 150mL, emulsifier sodium p-styrenesulfonate 0.0425g, initiator K 2 S 2 o 8 0.0833g, buffer NaHCO 3 0.0833g and styrene 18.3mL, distilled water, sodium p-styrenesulfonate and buffer NaHC...

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Abstract

The invention provides a preparation method for a metal salt / gamma-Al2O3 heat accumulating type catalyst carrier. The preparation method comprises the following steps of: preparing macropore gamma-Al2O3 by adopting aluminum nitrate an aluminum source and modified polystyrene microballoon spheres as a template agent; and soaking the metal to a pore channel of the macropore gamma-Al2O3, thereby finally obtaining the heat accumulating type gamma-Al2O3. According to the obtained metal salt / gamma-Al2O3 heat accumulating type catalyst carrier disclosed by the invention, the metal salt is uniformly and sufficiently distributed in a porous netted structure alumina matrix; a phase-change heat accumulating material is divided into a plurality of micro heat accumulating type units by the alumina pore channel; and the micro heat accumulating units are further used for preventing the molten phase-change material from flowing outwards due to tension action of a capillary tube while improving heat absorption and heat release, thereby not affecting the performances of the catalytic material due to changes of the micro heat accumulating type units as well as the heat accumulation and the heat release.

Description

technical field [0001] The invention provides a method for preparing a catalyst carrier with heat storage function, in particular to a metal salt / γ-Al 2 o 3 The invention discloses a method for preparing a heat storage catalyst carrier, which belongs to the technical field of applied catalysis. Background technique [0002] In recent years, the study of macroporous metal oxide materials has aroused widespread interest, because it has broad application prospects in the research fields of filtration and separation materials, catalyst supports, chromatographic supports, and cell immobilization supports. For example, the research on macroporous metal oxide materials provides an opportunity to solve the problems of excessive diffusion resistance of heavy oil molecules in the catalyst pores in the field of heavy oil catalysis, which hinders the increase of product liquid yield and affects the improvement of selectivity. [0003] Alumina is a very important metal oxide, which is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J32/00B01J27/232B01J27/10
Inventor 李孔斋王华吴冬冬魏永刚祝星杜云鹏宁培洪郑燕娥
Owner KUNMING UNIV OF SCI & TECH
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