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A kind of molecular sieve catalyst applied in seaweed liquefaction reaction and preparation method thereof

A catalyst and molecular sieve technology, which is applied in the direction of molecular sieve catalysts, preparation of liquid hydrocarbon mixtures, physical/chemical process catalysts, etc., can solve the problems of low stability and limited use of metal molecular sieve catalysts, and achieve excellent hydrothermal stability. Effect of deactivation and high fuel yield

Active Publication Date: 2017-05-03
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, a large number of experiments have shown that when only metals are loaded on the molecular sieve, although the catalytic efficiency is improved to a certain extent, the stability of the metal molecular sieve catalyst is not high, and the use is limited.
[0006] For the application of seaweed liquefaction, chemical liquid deposition method to modify metal-modified microporous-mesoporous composite molecular sieve catalysts has not been reported yet.

Method used

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  • A kind of molecular sieve catalyst applied in seaweed liquefaction reaction and preparation method thereof
  • A kind of molecular sieve catalyst applied in seaweed liquefaction reaction and preparation method thereof

Examples

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Embodiment 1

[0048] A method for preparing a metal-modified microporous-mesoporous composite molecular sieve catalyst modified by chemical liquid phase deposition, comprising the following steps:

[0049] (1) Take 10g of ZSM-5 molecular sieve and grind it into a particle size of 0.03mm, and treat it with 300mL of 0.8mol / L NaOH solution at 90°C for 1.5h to obtain an alkali-treated zeolite slurry; add sixteen Alkyltrimethylammonium bromide (CTAB) 3g, deionized water 1500mL until dissolved, then add 6g ethyl orthosilicate and continue stirring for 1h to obtain a solution. Add the prepared zeolite slurry to this solution, adjust the pH of the mixed solution to 10 with 1mol / L nitric acid, put the evenly stirred solution into a high-pressure reactor, crystallize at 170°C for 48h, and roast at 550°C for 6h Then ZSM-5 / MCM-41 composite molecular sieve is obtained.

[0050] (2) 1mol / L Ni(NO 3 ) 2 The solution was mixed with the composite molecular sieve catalyst prepared in the previous step at a...

Embodiment 2

[0053] (1) Take 9g of ZSM-5 molecular sieve and grind it into a particle size of 0.03mm, and treat it with 300mL of 1mol / L NaOH solution at 80°C for 2h to obtain an alkali-treated zeolite slurry; add hexadecyl to the beaker under stirring conditions Trimethylammonium bromide (CTAB) 3g, deionized water 2000mL until dissolved, then add 10g ethyl orthosilicate and continue stirring for 1.5h to obtain a solution. Add the prepared zeolite slurry to this solution, adjust the pH of the mixed solution to 9 with 1mol / L nitric acid, put the evenly stirred solution into a high-pressure reactor, crystallize at 180°C for 48 hours, and roast at 500°C After 8 hours, the ZSM-5 / MCM-41 composite molecular sieve was obtained.

[0054] (2) 0.5mol / L of Fe(NO 3 ) 2 Mix the solution with the composite molecular sieve catalyst prepared in the previous step at a mass ratio of 1:1, stir evenly, impregnate at room temperature for 12 hours, dry and roast at 500°C for 8 hours to obtain a modified compos...

Embodiment 3

[0057] (1) Take 5g of ZSM-5 molecular sieve and grind it into a particle size of 0.04mm, and treat it with 200mL of 1mol / L NaOH solution at 85°C for 1.8h to obtain an alkali-treated zeolite slurry; add hexadecane to the beaker under stirring conditions Trimethylammonium bromide (CTAB) 3g, deionized water 1500mL to dissolve, then add 9g ethyl orthosilicate and continue to stir for 1h to obtain a solution. Add the prepared zeolite slurry to this solution, adjust the pH of the mixed solution to 10 with 1mol / L nitric acid, put the evenly stirred solution into a high-pressure reactor, crystallize at 160°C for 60 hours, and roast at 525°C After 7 hours, the ZSM-5 / MCM-41 composite molecular sieve was obtained.

[0058] (2) 0.8mol / L Co(NO 3 ) 2 The solution was mixed with the composite molecular sieve catalyst prepared in the previous step at a mass ratio of 1:1, stirred evenly, impregnated at room temperature for 11 hours, dried and calcined at 5250°C for 7 hours to obtain a modifi...

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Abstract

The invention discloses a molecular sieve catalyst applied to a seaweed liquefaction reaction and a preparation method thereof. The method comprises the following steps: firstly, taking a ZSM-5 / MCM-41 composite molecular sieve catalyst as a carrier to metal to obtain a metal-loaded composite molecular sieve catalyst; then modifying the metal-loaded composite molecular sieve catalyst by using a chemical liquid phase deposition method to obtain a meso-microporopus composite molecular sieve catalyst. The catalyst can be applied to seaweed liquefaction and has obvious catalysis effect on the seaweed liquefaction so as to facilitate the aromatization of the product; the catalyst has obvious deoxidation effect, high fuel oil yield, high calorific value, low oxygen content and high content of aromatic hydrocarbon and long-chain alkane.

Description

technical field [0001] The invention belongs to the field of comprehensive utilization of biomass, especially seaweed, and specifically relates to a molecular sieve catalyst used in seaweed liquefaction and a preparation method thereof. Background technique [0002] The serious imbalance between people's increasing demand for fossil energy and the limited and non-renewable nature of traditional energy makes it urgent to find new renewable and environmentally friendly energy as a substitute. Biomass energy reserves are abundant and can be regenerated. From the perspective of chemical composition, biomass is composed of carbon, hydrogen, oxygen, nitrogen and other elements. It is similar to traditional fossil energy and does not contain sulfur, so it does not need to be used in the process of use. will emit SO 2 And it is a zero-carbon emission, so it can be used as an ideal potential alternative energy source for fossil energy. Compared with terrestrial biomass, seaweed has...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/80C10G1/00
Inventor 李金花张帅王宗花王国明杨敏
Owner QINGDAO UNIV
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