Method for preparing aviation oil through catalyzing algae oil by virtue of phosphotungstic acid-loaded nickel base molecular sieve

A molecular sieve, phosphotungstic acid technology, applied in molecular sieve catalysts, chemical instruments and methods, preparation of liquid hydrocarbon mixtures, etc., can solve the problems of affecting pore structure and acid distribution, affecting the reaction pathway of fatty acid methyl ester deoxygenation and bond breaking, etc. Enhanced reactivity, product selectivity, and improved contact probability

Active Publication Date: 2019-02-22
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, whether phosphotungstic acid is suitable for making bifunctional catalysts to convert microalgae oil into aviation oil has not been reported in the literature. Therefore, whether phosphotungstic acid loaded on gradient mesoporous molecular sieves will affect the pore structure and acid distribution, and then whether it will affect fatty acid methyl ester. The deoxygenation bond-breaking reaction pathway is a very interesting question

Method used

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  • Method for preparing aviation oil through catalyzing algae oil by virtue of phosphotungstic acid-loaded nickel base molecular sieve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Add 5 g of Y-type molecular sieve raw materials into 50 mL of NaOH solution with a concentration of 0.05 M, and stir for 0.25 h with a magnetic stirrer to make the OH - Ions and molecular sieve framework unit SiO 4 Si atoms in the center combine to form free Si(OH) 4 , by continuously removing Si atoms, a gradient distribution mesopore of 2-10 nm is formed on the molecular sieve framework. Then add hydrochloric acid to neutralize to pH = 7, filter the liquid by suction filtration, wash once with deionized water, add 50mL of NH with a concentration of 0.1M 4 The Cl solution was ion-exchanged for 0.25 h, and the liquid was filtered out by suction filtration, and then washed once with deionized water to obtain a gradient mesoporous molecular sieve carrier.

[0034] Take 4.3g of gradient mesoporous molecular sieve carrier, weigh 0.2g of phosphotungstic acid H 3 [P(W 3 o 10 ) 4 ] and 2.48g nickel nitrate hexahydrate Ni(NO 3 ) 2 ·6H 2 O, mixed and added to 20 mL of d...

Embodiment 2

[0037] Add 100g of Y-type molecular sieve raw material into 1000mL NaOH solution with a concentration of 1M, and stir for 8h with a magnetic stirrer to make the OH - Ions and molecular sieve framework unit SiO 4 Si atoms in the center combine to form free Si(OH) 4 , by continuously removing Si atoms, a gradient distribution mesopore of 2-10 nm is formed on the molecular sieve framework. Then add hydrochloric acid to neutralize to pH = 7, filter the liquid by suction filtration, wash with deionized water 5 times, add 1000mL of 2M NH 4 The Cl solution was ion-exchanged for 2 hours, the liquid was filtered out by suction filtration, and then washed with deionized water for 5 times to obtain a gradient mesoporous molecular sieve carrier.

[0038] Take 86g of gradient mesoporous molecular sieve carrier, weigh 4g of phosphotungstic acid H 3 [P(W 3 o 10 ) 4 ] and 49.54g nickel nitrate hexahydrate Ni (NO 3 ) 2 ·6H 2 O, mixed and added to 400 mL of deionized water. Stir with ...

Embodiment 3

[0041] Add 20 g of Y-type molecular sieve raw materials into 200 mL of NaOH solution with a concentration of 0.2 M, and stir for 2 h with a magnetic stirrer to make the OH - Ions and molecular sieve framework unit SiO 4 Si atoms in the center combine to form free Si(OH) 4 , by continuously removing Si atoms, a gradient distribution mesopore of 2-10 nm is formed on the molecular sieve framework. Then add hydrochloric acid to neutralize to pH = 7, filter the liquid by suction filtration, wash twice with deionized water, add 200mL of 1M NH 4 The Cl solution was ion-exchanged for 1 h, and the liquid was filtered out by suction filtration, and then washed twice with deionized water to obtain a gradient mesoporous molecular sieve carrier.

[0042] Take 17.2g of gradient mesoporous molecular sieve carrier, weigh 0.8g of phosphotungstic acid H 3 [P(W 3 o 10 ) 4 ] and 9.908g nickel nitrate hexahydrate Ni (NO 3 ) 2 ·6H 2 O, mixed and added to 200 mL of deionized water. Stir fo...

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Abstract

The invention relates to the utilization technique of biomass energy and aims at providing a method for preparing aviation oil through catalyzing algae oil by virtue of a phosphotungstic acid-loaded nickel base molecular sieve. The method comprises the following steps: adding a phosphotungstic acid-nickel base gradient mesoporous molecular sieve catalyst into a fixed bed continuous flow reactor, controlling the temperature and hydrogen pressure of the reactor, and carrying out deoxygenation bond breaking reaction on a microalgae biodiesel reactor, wherein four distil-off holes are sequentiallyformed in the side wall of the reactor from top to bottom and are used for discharging mixtures in the reactor in different reaction stages; and sequentially extracting four distillates, and mixing,so as to obtain a microalgae biological aviation oil product. According to the method, long-chain n-alkane is obtained through effectively controlling decarboxylic reaction of microalgae biodiesel, and is further subjected to bond breakage to generate short-chain n-alkane, and short-chain n-alkane is subjected to isomerization and aromatization so as to generate the microalgae biological aviationoil product with selectivity reaching up to 63.1%, the content of isoparaffin in the aviation oil product is remarkably increased to 32.5%, and a reasonable aromatic hydrocarbon content, namely 17.6%,is realized.

Description

technical field [0001] The invention relates to biomass energy utilization technology, in particular to a method for preparing aviation oil from algae oil catalyzed by nickel-based molecular sieve loaded with phosphotungstic acid. Background technique [0002] The International Air Transport Association (IATA) has pledged to reduce aviation net carbon dioxide emissions to half of 2005 levels by 2050. The carbon emissions generated by biomass energy utilization are almost equal to the carbon accumulated by biomass through photosynthesis, so bio-aviation fuels that are close to carbon neutral have broad application prospects. As a representative of the third generation of bio-energy, microalgae has many advantages such as fast growth, high oil content, no occupation of arable land, and no competition with food, etc. It is an ideal raw material for the preparation of bio-aviation fuel. The use of microalgae biodiesel (mainly composed of fatty acid methyl esters) for hydrogenat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/16C10G3/00
CPCB01J29/166C10G3/49C10G3/54C10G2400/08Y02E50/10Y02T50/678Y02P30/20
Inventor 程军岑可法周俊虎刘建忠王智化张彦威杨卫娟周志军何勇
Owner ZHEJIANG UNIV
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