Preparation method for catalyst used for deoxidation of biological fatty alcohol

A catalyst and fatty alcohol technology, which is applied in the field of catalyst preparation, can solve the problems of poor hydrothermal stability of alumina and achieve the effects of long service life, improved conversion rate and high conversion rate

Inactive Publication Date: 2014-10-08
ZHEJIANG UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is the problem of poor hydrothermal stability of alumina used in the prior art, and a preparation method of a catalyst for deoxidation of bio-fatty alcohol is provided, more specifically using γ-Al 2 o 3 , MCM-41 molecular sieve compounded as a carrier, expanded by acid, loaded with a

Method used

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Examples

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Comparison scheme
Effect test

preparation example Construction

[0012] The preparation method of the catalyst of this biological fatty alcohol deoxygenation of the present invention, the steps of the method are as follows:

[0013] (1), carrier preparation: 40-60 grams of γ-Al 2 o 3 Powder, 60-80 grams of MCM-41 molecular sieve powder with a pore size of 10-50nm and 5-10 grams of Tianqing powder, stir and mix in a dry state, add 50-100ml deionized water and 20-30ml with a concentration of 15%-20% Dilute nitric acid aqueous solution, kneading repeatedly for 20-30 minutes, extruded into cylindrical shape, clover shape or spherical shape, dried at room temperature for 2-5 hours, dried in an oven at 105°C-120°C for 2 hours, and then calcined at 500°C for 4-5 hours to obtain carrier;

[0014] (2) Take 100g carrier, add it to 200ml-250ml of 1%-2% acid solution to expand the pores, react for 0.2-0.5h, then wash with deionized water for 3-5 times, dry at room temperature for 2h, and store at 105°C- Dry in an oven at 120°C for 2 hours, then calc...

Embodiment 1

[0021] 80g γ-Al 2 o 3 Mix with 40g of MCM-41 molecular sieve with a pore size of about 35nm, 5g of Tianqing powder in a dry state, then add 50ml of deionized water and a small amount of nitric acid, knead repeatedly for 30 minutes, and extrude a cylindrical carrier with a diameter of 2mm; dry at room temperature for 5h, Dry in an oven at 105°C for 2h, and then calcined at 500°C for 5h to obtain a carrier. Take 100g of the carrier, add it to 200ml of 2% hydrochloric acid, react for 0.2h, then wash with deionized water 5 times, dry at room temperature for 2h, dry in an oven at 105°C for 2h, and then calcinate at 500°C for 4h. After cooling to normal temperature, immerse in 40ml tetraammonium platinum nitrate aqueous solution containing 0.3g Pt for 5 hours, dry at normal temperature for 12 hours, dry at 120°C for 2 hours, and calcined at 550°C for 4 hours to obtain the catalyst of Example 1 of the present invention.

[0022] The performance evaluation of the catalyst was carrie...

Embodiment 2

[0024] 40g γ-Al 2 o 3 Mix with 80g of MCM-41 molecular sieve with a pore size of about 35nm and 5g of Tianqing powder in a dry state, then add 50ml of deionized water and a small amount of nitric acid, knead repeatedly for 20 minutes, and extrude a cylindrical carrier with a diameter of 1.6mm; dry at room temperature for 2 hours , dried in an oven at 120°C for 2h, and then calcined at 500°C for 4h to obtain a carrier. Take 100g carrier, add it to 250ml sulfuric acid solution (1%), react for 0.5h, then wash 4 times with deionized water, dry at room temperature for 2h, dry in an oven at 120°C for 2h, and then calcined at 500°C for 4h. After cooling to room temperature, impregnate with 40ml palladium acetate solution containing 0.3g Pd for 5 hours, dry at room temperature for 5 hours, dry at 120°C for 2 hours, and roast at 550°C for 4 hours to obtain the catalyst of Example 2 of the present invention.

[0025] The performance evaluation of the catalyst was carried out on a norm...

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Abstract

The invention relates to a preparation method for a catalyst used for deoxidation of biological fatty alcohol. The method comprises the following steps: 1, mixing gamma-Al2O3 powder, MCM-41 molecular sieve powder and Sesbania cannabina powder under stirring, adding deionized water and an aqueous dilute nitric acid solution, carrying out repeated kneading and extrusion so as to obtain a cylindrical, clover-shaped or spherical substance and subjecting the substance to room temperature drying, drying in a baking oven and calcining so as to obtain a carrier; and 2, taking the carrier, adding the carrier into an acid solution for pore expansion, washing the carrier with deionized water, subjecting the carrier to room temperature drying, drying in the baking oven and calcining, then cooling the carrier to normal temperature, dipping the carrier with a dipping solution and successively carrying out drying at normal temperature, drying at 120 DEG C and roasting so as to prepare the catalyst. The invention has the following beneficial effects: since gamma-Al2O3 and an MCM-41 molecular sieve are cooperatively used and the aqueous acid solution is used for pore expansion, the pore diameter and the pore volume of the catalyst are increased; reduction is carried out after loading of metal components consisting of Pt and Pd, so rapid diffusion of molecules is promoted, and the conversion rate is increased; the catalyst is applicable to biological high alcohols and has the advantages of low reaction pressure, a high conversion rate and long service life.

Description

technical field [0001] The invention belongs to the technical field of chemical engineering and new biological energy, in particular to a preparation method of a catalyst for deoxygenation of biological fatty alcohol. Background technique [0002] With the decrease of global oil and the continuous increase of people's demand for petroleum fuel, the energy crisis is becoming more and more serious. In recent years, bio-fermentation technology can produce bio-ethanol, and animal and vegetable oils and fatty acids can be prepared to remove higher fatty alcohols after multi-step reactions. These bioalcohols can be dehydrated by a catalyst to obtain olefins, thereby completing the transformation from biooxygenated compounds to oxygen-free hydrocarbons, which is a key step in the preparation of liquid fuels that can replace fossil raw materials from biomass. The obtained liquid biofuel belongs to renewable energy, which can reduce the dependence of human beings on fossil energy an...

Claims

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Application Information

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IPC IPC(8): B01J29/068C10G3/00
CPCY02P30/20
Inventor 计建炳刘学军林绍杰于凤文卢美贞朱萃汉
Owner ZHEJIANG UNIV OF TECH
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