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A kind of preparation method of high temperature resistant anti-coking supported gold nano catalyst

An anti-coking, supported technology, used in catalyst activation/preparation, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc. economic effect

Active Publication Date: 2019-06-18
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the temperature of some reactions is relatively high, and the temperature rises, and the problem of high temperature agglomeration of gold nanometers still exists.

Method used

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  • A kind of preparation method of high temperature resistant anti-coking supported gold nano catalyst
  • A kind of preparation method of high temperature resistant anti-coking supported gold nano catalyst

Examples

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Effect test

Embodiment 1

[0021] First put 100g of blue-green algae in 1L of aqueous solution containing 5g of chloroauric acid, stir or shake for 3 hours, and then recover the blue-green algae that have adsorbed heavy metal ions through a filter device or by collecting suspended matter on the surface of the water body. Then, the collected gold-adsorbed cyanobacteria were dried at 100° C. for 2 hours, and then these dried cyanobacteria were placed in a tubular reactor, and nitrogen or inert gas was continuously fed to remove the air remaining in the reactor. Gradually increase the temperature in the reactor to 600°C at a heating rate of 10°C / min. After maintaining this temperature for 4 hours, let the reactor cool down to room temperature naturally, and collect the residual solid in the reactor, which is the high-temperature-resistant supported gold nanometer. catalyst.

Embodiment 2

[0023] Obtain the dried cyanobacteria with gold attached by the method of Example 1. The difference is that 100g of cyanobacteria is placed in 1L containing 1g of chloroauric acid, and the temperature in the reactor is 700°C, and this temperature is maintained for 2 hours.

Embodiment 3

[0025] Obtain the dried cyanobacteria with gold attached by the method of Example 1. The difference is that 100g of cyanobacteria is placed in 1L containing 2.5g of chloroauric acid, and the temperature in the reactor is 650°C, and this temperature is maintained for 10 hours.

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Abstract

The invention relates to a preparation method of a heat-resistant anti-coking load-type gold nanoparticle catalyst. The preparation method includes: adding algae or aquatic plants into a gold precursor solution for reduction reaction in adsorption; taking out the algae or the aquatic plants to perform dehydration treatment, placing the algae or the aquatic plants in an oxygen-isolated reactor for dry distillation and heating the algae or the aquatic plants to the temperature ranging from 600 to 700DEG C; naturally cooling to indoor temperature to acquire the black-powder type solid catalyst. Compared with the prior art, a load-type gold nanoparticle catalyst is prepared by subjecting gold ions to reduction-adsorption with algae of blue algae, green algae and the like or aquatic plants of water caltrop, water nymph and the like prior to dry distillation in high temperature; the preparation method has the advantages of being anti-coking and heat resistant, neither coking nor agglomerating occurs under the temperature of 700DEG C, feasibility that the gold nanoparticle catalyst can be used for catalysis under the high temperature of 700DEG C is realized, and the preparation method is green, pollution free and good in economic return.

Description

technical field [0001] The patent of the present invention relates to the technical field of chemical product preparation, in particular to a process for preparing a high-temperature-resistant and anti-coking supported gold nanocatalyst by using aquatic plants or algae plants. Background technique [0002] Using biomass to reduce and prepare nanoparticles with different shapes and sizes, as an environmentally friendly nanomaterial preparation method that has emerged in recent years, has been widely favored by researchers and is a great potential alternative to traditional chemical methods. An effective method for preparing gold nanometers and physical methods. The obvious advantage of the biological method is that it utilizes a large amount of cheap and easy-to-obtain biomass resources in nature, the reduction conditions are mild (generally at room temperature), and there is no need to add chemical reagents other than metal precursors during the preparation process. Relying...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/52
CPCB01J23/52B01J37/084
Inventor 孙津生尹红吕灏杨洁魏东梅崔承天
Owner TIANJIN UNIV
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