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Catalyst for preparing aviation kerosene components through one-step hydrodeoxygenation cracking isomerization of grease and preparation method of catalyst

A technology of aviation kerosene and hydrodeoxygenation, which is applied in the field of catalysis, can solve the problems of catalyst poisoning, and achieve the effects of low hydrogen and energy, low viscosity, and simple preparation methods

Inactive Publication Date: 2014-07-16
KUNMING INST OF PRECIOUS METALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In patents EP1396531, WO2009156452, and WO2008058664, it is pointed out that water will poison the commonly used supported noble metal / molecular sieve catalysts, which is also the main reason why the current bio-aviation kerosene preparation does not use a one-step hydrogenation process but a two-stage hydrogenation process

Method used

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  • Catalyst for preparing aviation kerosene components through one-step hydrodeoxygenation cracking isomerization of grease and preparation method of catalyst
  • Catalyst for preparing aviation kerosene components through one-step hydrodeoxygenation cracking isomerization of grease and preparation method of catalyst

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1, Pd / (beta-Al 2 o 3 ) Preparation of catalyst

[0027] (1) 3g H-beta molecular sieve (specific surface area is 526m 2 / g, the pore volume is 0.6ml / g, the crystallinity is 100%, the silicon-aluminum ratio is 25) added to 16.6g Al 2 o 3 (The specific surface area is 200-600m 2 / g, the pore volume is 0.30~0.60ml / g), add 200ml deionized water, stir overnight at room temperature;

[0028] (2) Pd(NO 3 ) 2 The aqueous solution was transferred to (1) the composite carrier aqueous solution, and stood at room temperature for 4 hours, then evaporated to dryness in a water bath at 90°C, then placed in an oven, dried overnight at 120°C, and finally baked in a muffle furnace at 500°C for 5 hours. Finally, it was reduced in an autoclave for 6 hours at 300°C under a hydrogen pressure of 1MPa;

[0029] The prepared catalyst has a mass fraction of Pd of 2%, a mass fraction of beta molecular sieve of 15%, Al 2 o 3 Pd / (beta-Al with a mass fraction of 83% 2 o 3) hydr...

Embodiment 2

[0030] Embodiment 2, Pd / (beta-Al 2 o 3 ) Preparation of catalyst

[0031] (1) 6g H-beta molecular sieve (specific surface area is 526m 2 / g, pore volume is 0.6ml / g, crystallinity is 100%, silicon-aluminum ratio is 25) added to 13.6g Al2O3 (specific surface area is 200-600m 2 / g, the pore volume is 0.30~0.60ml / g), add 200ml deionized deionized deionized water, and stir overnight at room temperature;

[0032] (2) Move the Pd(NO3)2 aqueous solution accounting for 2% of the mass fraction of the catalyst to (1) the composite carrier aqueous solution, let it stand at room temperature for 4 hours, evaporate to dryness in a water bath at 90°C, and then put it in an oven and dry it at 120°C Overnight, then roasted in a muffle furnace at 500°C for 5h, and finally reduced in an autoclave at 300°C under a hydrogen pressure of 1MPa for 6h;

[0033] The prepared catalyst has a mass fraction of Pd of 2%, a mass fraction of beta molecular sieve of 30%, Al 2 o 3 Pd / (beta-Al with a mass f...

Embodiment 3

[0034] Embodiment 3, Pd / (beta-Al 2 o 3 ) Preparation of catalyst

[0035] (1) 9g H-beta molecular sieve (specific surface area is 526m 2 / g, the pore volume is 0.6ml / g, the crystallinity is 100%, the silicon-aluminum ratio is 25) added to 10.6g Al 2 o 3 (The specific surface area is 200~600m 2 / g, the pore volume is 0.30~0.60ml / g), add 200ml deionized deionized deionized water, and stir overnight at room temperature;

[0036] (2) Pd(NO 3 ) 2 Move the aqueous solution to (1) the composite carrier aqueous solution, let it stand at room temperature for 4 hours after impregnation, evaporate to dryness in a water bath at 90°C, then put it in an oven, dry it at 120°C overnight, and then bake it in a muffle furnace at 500°C for 5 hours, and finally Reduction in an autoclave for 6 hours at 300°C under a hydrogen pressure of 1MPa;

[0037] The prepared catalyst has a mass fraction of Pd of 2%, a mass fraction of beta molecular sieve of 45%, Al 2 o 3 Pd / (beta-Al with a mass fr...

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Abstract

The invention relates to a catalyst for preparing aviation kerosene components through one-step hydrodeoxygenation cracking isomerization of grease and a preparation method of the catalyst. The catalyst is mainly used for the process of preparing new-generation ultra-clean aviation fuel oil substitution components through one-step catalytic hydrogenation of grease model compounds, grease and derivatives of the grease. The catalyst provided by the invention is loading noble metal / composite solid acid carrier catalyst which is composed of 0.2-5.0% of Pd, 5-85% of a bata molecular sieve, 10-94.8% of Al2O3. With the adoption of the catalyst, the grease and the grease model compounds can be converted into the biological aviation kerosene components (C8-C16) through hydrogenation, deoxygenation, cracking and isomerization. The catalyst obtained by the preparation method has the advantages of high activity, high selectivity, low hydrogen consumption and the like, and has great significance in promoting development of biological aviation kerosene and reduction of carbon emission; in evaluation for the catalytic activity of the catalyst, the hydrodeoxygenation conversion rate of grease is 100%, and the yield of the aviation kerosene components is 72.3%.

Description

technical field [0001] The invention relates to a hydrodeoxygenation cracking isomerization catalyst used for preparing biological aviation kerosene components. It is mainly used in the one-step hydrogenation preparation process of a new generation of ultra-clean alternative fuel for turbojet engines. The invention belongs to the technical field of catalysis. Background technique [0002] Aviation kerosene is one of the most demanded liquid fuels in the world at present, and it is a national strategic material. There are many specifications, generally composed of straight-chain saturated alkanes, isoparaffins, naphthenes and aromatics with 8 to 16 carbons. Traditional aviation kerosene mainly comes from catalytic cracking and hydrocracking of petroleum resources. However, the aviation industry is currently facing the dual pressures of global crude oil resource shortage and carbon dioxide emission reduction. Finding a new generation of ultra-clean aviation alternative fuel...

Claims

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Application Information

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IPC IPC(8): B01J29/74C10G3/00
CPCY02P30/20
Inventor 杜君臣张爱敏夏文正赵云昆陶峰
Owner KUNMING INST OF PRECIOUS METALS
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