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A catalyst for biodiesel hydrodeoxygenation reaction and its preparation method and application

A biodiesel and deoxygenation reaction technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, carbon compound catalyst, liquid hydrocarbon mixture preparation, etc., can solve the problem of low utilization rate and catalytic efficiency, low H atom economy , Carrier acid center residues and other issues, to achieve high metal utilization, improve product selectivity, and improve the effect of dispersion

Active Publication Date: 2022-07-12
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the shortcomings of the above-mentioned hydrodeoxygenation catalysts, such as low utilization rate and catalytic efficiency of Pt, residue of carrier acid center, low selectivity, and low economy of biodiesel C and H atoms, a biodiesel hydrodeoxygenation reaction catalyst is provided. Catalyst and preparation method thereof, the acidity of the surface of the catalyst carrier is reduced, the side reaction is less, the catalytic activity is high, and the stability is good

Method used

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  • A catalyst for biodiesel hydrodeoxygenation reaction and its preparation method and application
  • A catalyst for biodiesel hydrodeoxygenation reaction and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] catalyst preparation

[0038] (1) Preparation of catalyst carrier. Weigh 60.294g Al (NO 3 ) 3 ·9H 2 O (molecular weight: 375), 0.630g Mn (NO 3 ) 2 (Molecular weight: 179) and 2.559g Ba (NO 3 ) 2 (Molecular weight: 261) was dissolved in 150ml of deionized water, made into a solution, and stirred for 1 h; heated the solution to 60°C, neutralized with 5wt% sodium carbonate solution, and controlled the pH to 9; filtered and washed with deionized water and then used 10mol / L nitric acid solution was acidified to pH 6, stirred to a sol-like state to obtain a carrier slurry; the slurry was added dropwise to the oil-ammonia column, the sol was shrunk into a spherical gel, aged for 2 hours, the gel spheres were taken out, and washed with deionized water , dried at 120 °C for 12 h, and calcined at 500 °C for 8 h to obtain composite oxide carrier beads;

[0039] (2) Weigh 0.057g SnCl 2 ·2H 2 O (molecular weight: 226) and 0.120 g H 2 PtCl 6 ·6H 2 O (molecular weight: 5...

Embodiment 2

[0043] The catalyst preparation process is the same as that of Example 1.

[0044] Catalyst evaluation: The evaluation conditions were the same as in Example 1, except that the evaluation raw material was changed to methyl oleate. The specific conditions are that the reactor adopts a radial reactor, and the reaction temperature of hydrogenation bed I (loaded with basic alumina, Shanghai Yuanjiang Chemical, 80-160 mesh) and hydrogenation bed II (loaded with catalyst A) is 45 ° C, The reaction pressure was 4.0MPa, the molar ratio of hydrogen and methyl oleate (18:1) was 0.5, and the liquid hourly space velocity was 4h -1 . The catalyst needs to be reduced with pure hydrogen before the reaction. The reduction temperature is 500°C and the reduction time is 3h. The catalyst for cracking bed III is selected as ZSM-5 type catalytic material, and the process conditions are 600 ℃ and space velocity 10h -1 , the reaction pressure is 4.0MPa, and the catalyst-oil ratio is 8. The cataly...

Embodiment 3

[0046] (1) Preparation of catalyst carrier. Weigh 57.904g Al (NO 3 ) 3 9H2O (molecular weight: 375), 0.756g Mn (NO 3 ) 2 (Molecular weight: 179) and 3.071g Ba (NO 3 ) 2 (Molecular weight: 261) was dissolved in 150ml of deionized water, made into a solution, and stirred for 1 hour; heated the solution to 45°C, neutralized with 5wt% sodium carbonate solution, and controlled the pH to 9; filtered and washed with deionized water and then used 10mol / L nitric acid solution was acidified to pH 6, stirred to a sol-like state to obtain a carrier slurry; the slurry was added dropwise to the oil-ammonia column, the sol was shrunk into a spherical gel, aged for 2 hours, the gel spheres were taken out, and washed with deionized water , dried at 160°C for 18h, and calcined at 550°C for 8h to obtain composite oxide carrier pellets;

[0047] (2) Weigh 0.028g SnCl 2 ·2H 2 O (molecular weight: 226) and 0.060 g H 2 PtCl 6 ·6H 2 O (molecular weight: 518) was dissolved in 250 ml of hyd...

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Abstract

The invention discloses a catalyst for the hydrodeoxygenation reaction of biodiesel and its preparation method and application. The catalyst is MnO-BaO-Al 2 O 3 The composite oxide is used as the carrier, the metal Pt is used as the active component, and the auxiliary agent is Sn. The supported catalyst in which the active component Pt is distributed on the carrier in an eggshell shape was prepared by impregnation method, and the eggshell Pt / MnO‑BaO‑Al was prepared by using the additive Sn. 2 O 3 The catalyst was modified. The catalyst of the invention cooperates with the radial reactor and has a good effect on the cracking of biodiesel to generate propylene. The obtained catalyst has high utilization rate of Pt, good selectivity and high catalytic efficiency, and can make full use of high-quality biological products containing straight-chain carbon groups. Diesel feedstock cracking produces more propylene.

Description

technical field [0001] The present invention relates to a catalyst for biodiesel hydrodeoxygenation reaction, its preparation method and application. Background technique [0002] Propylene itself is a common basic chemical raw material, which is widely used in the production of acrylonitrile, epoxy propylene, acetone and other chemical fields. At present, there is still a big gap in the market. The main chemical components of biological oils and fats such as animals and plants are triglycerides formed by higher fatty acids and free higher fatty acids, mainly containing C, H, O elements, which are green and renewable energy sources. At the same time, due to the continuous improvement of agricultural production technology, the output of bio-oil has increased rapidly, and the production cost has also dropped sharply. In recent years, with the massive consumption of fossil energy and the decreasing reserves, the transformation of renewable bio-oils into fossil crude oil resour...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/656C07C1/20C10G3/00C07C11/06
CPCB01J23/002B01J23/6562C07C1/20C10G3/49C07C2523/656C07C11/06Y02P20/52
Inventor 徐艳飞孔祥明李江蒋锋王兰磊温达芬国欣常林张宏科华卫琦
Owner WANHUA CHEM GRP CO LTD
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