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A kind of hydrodeoxygenation solid acid catalyst ni/ceo 2 -al 2 o 3

A ceo2-al2o3, deoxidized solid technology, applied in the direction of metal/metal oxide/metal hydroxide catalysts, catalysts, carbon compound catalysts, etc., can solve the cost of precious metals and pollution of sulfur-containing catalysts, reduce catalytic activity, and easy carbon deposition and other problems, to achieve the effect of good reusability, simple preparation process and strong anti-sintering ability

Active Publication Date: 2022-04-01
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Catalysts supporting noble metals such as Pt, Pd, Ru, and transition metals containing sulfur have been applied in hydrodeoxygenation, decarboxylation, decarbonylation, etc., but there are problems of noble metal cost and pollution of sulfur-containing catalysts
In addition, solid acid carriers loaded with transition metals, such as HZSM-5, Al-SBA-15, SAPO-11, etc., can catalyze biomass oils to obtain higher yields of biofuel liquid alkane products, but due to the high acidity, the biological Substance oil cracking and isomerization reactions are unavoidable, affecting the composition of the target product, and these carriers are prone to carbon deposition in the process of hydrodeoxygenation, thereby reducing catalytic activity or deactivating the catalyst

Method used

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  • A kind of hydrodeoxygenation solid acid catalyst ni/ceo <sub>2</sub> -al <sub>2</sub> o <sub>3</sub>
  • A kind of hydrodeoxygenation solid acid catalyst ni/ceo <sub>2</sub> -al <sub>2</sub> o <sub>3</sub>
  • A kind of hydrodeoxygenation solid acid catalyst ni/ceo <sub>2</sub> -al <sub>2</sub> o <sub>3</sub>

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1. Preparation of Ni / CeO 2 -Al 2 o 3 catalyst

[0032] Ce(NO 3 ) 3 ·6H 2 O and Al(NO 3 ) 3 9H 2 O is dissolved in deionized water at a molar ratio of 3:1 to form a solution with a total concentration of 0.3mol / L, and the addition of NO 3 -3:1 molar ratio of urea, stir evenly until the solution is clear, then transfer the mixed solution to a polytetrafluoroethylene-lined reactor for crystallization at 110°C for 4 hours, cool to room temperature, and suction filter the formed precipitate , the filter cake was washed with deionized water until neutral (pH = 7), and dried at a constant temperature at 80°C overnight. The resulting solid was ground and sieved, and the 100-mesh powder was placed in a box-type muffle furnace with a temperature increase of 2°C / min. Calcined at 500°C for 4 hours, and the CeO containing weak acid and medium strong acid was obtained after cooling. 2 -Al 2 o 3 carrier;

[0033] Ni(NO 3 ) 2 ·6H 2 O, CeO prepared above 2 -Al 2 o 3 ...

Embodiment 2

[0036] The operation procedure of Example 2 is the same as that of Example 1, but the molar ratio of Ce and Al in the catalyst is 0.5:1, and the molar yield of the biofuel product n-heptadecane is 77%, and the product purity is 98% by mass.

Embodiment 3

[0037] The operation steps of Example 3 are the same as in Example 1, but the molar ratio of Ce and Al in the catalyst is 1:1, and the molar yield of the biofuel product n-heptadecane is 94%, and the product purity is 98% by mass.

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Abstract

The invention discloses a catalyst Ni-CeO containing weak acid and medium strong acid 2 / Al 2 o 3 Catalyzed hydrodeoxygenation of ethyl oleate to generate n-heptadecane biofuel, Ni / CeO 2 ‑Al 2 o 3 The catalyst has high catalytic activity, is easy to separate from the reaction system, and has good reusability. When the mass ratio of catalyst, reaction raw material ethyl oleate, and reaction solvent is 0.2-0.5:1:10, the pressure of hydrogen added is 2.5-3.0 MPa, and the reaction temperature 280-300 DEG C, and the reaction time is 6-8 hours, the hydrodeoxygenation product product n-heptadecane bio-fuel has a molar yield of more than 95%, and a product quality purity percentage of 98%.

Description

technical field [0001] The invention belongs to the field of biomass energy catalysis, and relates to a solid acid catalyst Ni / CeO for catalyzing biomass hydrodeoxygenation 2 -Al 2 o 3 And its preparation method and application. Background technique [0002] Biofuel is a kind of renewable energy. The first and second generation biodiesel are fatty acid monoalkyl esters obtained through the transesterification reaction of animal and vegetable oils and alcohols (methanol or ethanol). High degree of saturation, high freezing point, low calorific value, high viscosity, direct hydrodeoxygenation of biomass can produce biofuel with better performance. Catalysts supporting Pt, Pd, Ru and other noble metals and sulfur-containing transition metals have been applied in hydrodeoxygenation, decarboxylation, and decarbonylation, but there are problems of noble metal cost and pollution of sulfur-containing catalysts. In addition, solid acid carriers loaded with transition metals, such...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/83B01J35/10C07C1/207C07C9/22C10G3/00
CPCB01J23/83B01J35/0093B01J35/1061B01J35/1019C10G3/45C07C1/2078C07C2523/83C07C9/22Y02P30/20
Inventor 刘跃进崔华敏付琳李勇飞
Owner XIANGTAN UNIV
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