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A preparation method of a hydrodeoxygenation isomerization catalyst, a hydrodeoxygenation isomerization catalyst and its application

A hydrodeoxygenation and catalyst technology, which is applied in molecular sieve catalysts, fatty acid isomerization, chemical instruments and methods, etc., can solve the problems of poor adjustment of catalyst acidity and high requirements for catalyst selectivity, etc., achieve rich channels and increase catalytic efficiency , high catalytic efficiency

Active Publication Date: 2018-10-09
NANKAI UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this kind of catalyst can only get diesel oil, and the acidity of the catalyst is weak during the process of preparing diesel oil, while the carbon chain of kerosene is between gasoline and diesel oil, so the selectivity requirements of the catalyst are relatively high, and the acidity of the required catalyst is not easy to adjust. General catalysts are easy to directly convert vegetable oil into diesel or gasoline. At present, there are few catalysts that use carbon nanotubes to support active components to obtain highly selective kerosene.
In PCT / CN2015 / 089534 "Catalyst and preparation method and application for preparing bio-jet fuel from castor oil", we also used carbon nanotube mechanically mixed molecular sieves as the carrier of hydroisomerization, and supported precious metals to A hydroisomerization catalyst has been prepared, but the essence of this method is still a two-step method, and there are still problems with the two-step method. A method with better catalytic effect, simpler process, and better stability is needed for aviation Preparation of kerosene

Method used

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  • A preparation method of a hydrodeoxygenation isomerization catalyst, a hydrodeoxygenation isomerization catalyst and its application
  • A preparation method of a hydrodeoxygenation isomerization catalyst, a hydrodeoxygenation isomerization catalyst and its application
  • A preparation method of a hydrodeoxygenation isomerization catalyst, a hydrodeoxygenation isomerization catalyst and its application

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preparation example Construction

[0040] A preparation method of a hydrodeoxygenation isomerization catalyst is characterized in that comprising the following steps:

[0041] Step a: Attachment of active components: attaching the active components to carbon nanotubes;

[0042] Step b: synthesis of hydrodeoxygenation isomerization catalyst: mixing and stirring the modified carbon nanotubes with active components attached to deionized water, silica sol, phosphoric acid and pseudo-boehmite, adding the mixture to the template agent and stirring, Recrystallization, washing, calcination and reduction are carried out to obtain the desired hydrodeoxygenation isomerization catalyst.

[0043] In the step b, a precipitant is added to the crystallized mixture for precipitation, and then washing and roasting are performed to precipitate free active components, so as to ensure the effect of the catalyst.

[0044] The process of the step a is as follows: 1) firstly, the carbon nanotubes are hydroxylated to obtain hydroxylat...

Embodiment 1

[0067] Example 1: Preparation of NiFeMWNTSAPO-11 catalyst

[0068] (1) NiFeMWNT-NH 2 Preparation steps: first, 10g of carbon nanotubes were added to 30g of 10% potassium hydroxide ethanol solution, refluxed and stirred at 80 ° C for 3-5 hours, and then the obtained mixed solution was vacuum filtered and filtered. The cake was repeatedly washed with distilled water until the pH value of the solution was washed to neutrality, and the filter cake finally obtained was dried in an oven at 110°C for 4-8 hours to obtain MWNT-OH. Then, the obtained 5g MWNT-OH powder was added to 15g DMF solution, refluxed and stirred at 110°C for half an hour, and then 1.5g KH-570 was added to continue stirring under this condition for 10 hours, and then the obtained mixed solution was filtered under reduced pressure. Then the obtained filter cake was washed repeatedly with DMF until the pH value of the solution was washed to neutrality, and the finally obtained filter cake was dried in an oven at 11...

Embodiment 2

[0073] Example 2: Preparation of NiFeMWNTSAPO-11 catalyst

[0074] (1) NiFeMWNT-NH 2 Preparation steps: firstly, 10g of carbon nanotubes were added to 30g of 10% potassium hydroxide ethanol solution, refluxed and stirred at 80 ° C for 3-5 hours, then the obtained mixed solution was vacuum filtered, and then the obtained filtered The cake was repeatedly washed with distilled water until the pH value of the solution was washed to neutrality, and the filter cake finally obtained was dried in an oven at 110° C. for 4-8 hours to obtain MWNT-OH. Then, the obtained 5g MWNT-OH powder was added to 15g DMF solution, refluxed for half an hour at 110°C, and then 1.5g KH-570 was added to continue stirring under this condition for 10 hours, and then the obtained mixed solution was filtered under reduced pressure. Then the obtained filter cake was washed repeatedly with DMF until the pH value of the solution was washed to neutrality, and the finally obtained filter cake was dried in an oven...

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Abstract

The invention belongs to the technical field of preparation of aviation kerosene, and particularly relates to a preparation method of a hydrodeoxidation isocatalyst, a hydrodeoxidation isocatalyst and application thereof. Carbon nanotubes are modified by nickel phthalocyanine so as to introduce Ni and N elements into the carbon nanotubes, iron phthalocyanine is added to cooperate with the nickel phthalocyanine, and the modified carbon nanotubes are added into a SAPO-11 synthetic gel in the form of a gel component, so that the synthesized SAPO-11 has more abundant pores and higher acid strength; and by introducing the Ni, Fe and N, the synthesized molecular sieve has the hydrodeoxidation activity, so that the synthesized NiFeCNTSAPO-11 can be directly used as a biological aviation kerosene catalyst for hydrogenating vegetable oil, thereby omitting the step of impregnating active components into the support and simplifying the preparation procedure. Besides, the hydrodeoxidation isocatalyst has high catalytic efficiency and high biological aviation kerosene yield (up to 78-85%).

Description

technical field [0001] The invention belongs to the technical field of aviation kerosene preparation, and in particular relates to a preparation method of a hydrodeoxygenation isomerization catalyst, a hydrodeoxygenation isomerization catalyst and an application thereof. Background technique [0002] With the continuous depletion of fossil energy such as oil and coal, global oil resources are gradually decreasing, and energy issues will become a crucial issue hindering human development, which will eventually lead to an energy crisis. Finding alternatives to traditional fossil energy has become a global issue. focus of attention. To alleviate the energy crisis, the development of renewable fuels is necessary. Biodiesel is a new kind of renewable energy. With the development of technology and society, Yuemi has attracted more and more attention. In recent years, methyl-esterified vegetable oil prepared by acid, alkali and enzyme catalysis has been used as the first generat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/85C10G3/00C11C3/12C11C3/14
CPCB01J29/85B01J2229/183C10G3/49C11C3/123C11C3/14Y02P30/20
Inventor 李伟刘思阳关庆鑫何良年叶峰
Owner NANKAI UNIV
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